diff --git a/changelog.d/nj-njhps-exact-fpl-ratio.fixed.md b/changelog.d/nj-njhps-exact-fpl-ratio.fixed.md
new file mode 100644
index 00000000000..21f10cbee01
--- /dev/null
+++ b/changelog.d/nj-njhps-exact-fpl-ratio.fixed.md
@@ -0,0 +1 @@
+Decide New Jersey Health Plan Savings' 600% income ceiling on the exact ratio of ACA MAGI to the prior-year poverty guideline instead of the truncated `aca_magi_fraction`, so incomes from 600.003% to 600.994% of the poverty line are no longer eligible, and put a household exactly at 150%, 200%, 250% or 400% of the poverty line (or up to one point above it) in the higher per-member band, following DOBI's table of plan year 2026 amounts ("At least 150% FPL but less than 200% FPL", ..., "At least 550% FPL but less than or equal to 600% FPL", "Above 600% FPL").
diff --git a/policyengine_us/parameters/gov/states/nj/dobi/njhps/pmpm.yaml b/policyengine_us/parameters/gov/states/nj/dobi/njhps/pmpm.yaml
index b8a97a386f6..ce267dacf4f 100644
--- a/policyengine_us/parameters/gov/states/nj/dobi/njhps/pmpm.yaml
+++ b/policyengine_us/parameters/gov/states/nj/dobi/njhps/pmpm.yaml
@@ -14,6 +14,8 @@ metadata:
       href: https://pub.njleg.gov/bills/2020/AL20/61_.HTM
     - title: Get Covered NJ - New Jersey Health Plan Savings
       href: https://www.nj.gov/getcoverednj/financialhelp/premiums/
+    - title: NJ DOBI 2027 Rate Filing Requirements, section 7 (plan year 2026 subsidy amounts by FPL range)
+      href: https://www.nj.gov/dobi/division_insurance/ihcseh/ratefilings/2027RateFilingRequirements.pdf#page=4
 
 brackets:
   # Household income measured as ACA MAGI as a share of the federal poverty line.
@@ -33,17 +35,23 @@ brackets:
   # FY2026, continuing "up to 600% FPL"). Neither source alone both states the
   # values and confirms PY2026 currency, so both are carried. The Get Covered NJ
   # URL is a secondary (anchorless) corroborating reference, not a value source.
-  # Bands are lower-exclusive / upper-inclusive, so thresholds use the "x.0001"
-  # convention to match the published "from X% through Y%" banding. The 138% floor
-  # is enforced by the eligibility gate; this base band gives $0 below 138% FPL so
-  # the single_amount lookup covers the full domain.
+  # Bands are lower-inclusive / upper-exclusive, as DOBI's 2027 Rate Filing
+  # Requirements (section 7) tabulate "the subsidy amounts from plan year 2026":
+  # "Less than 150% FPL" $20, "At least 150% FPL but less than 200% FPL" $40, ...,
+  # "At least 550% FPL but less than or equal to 600% FPL" $50, "Above 600% FPL"
+  # $0. Each threshold is therefore the band's lower edge, and a household exactly
+  # at an edge takes the higher band. The scale reads the truncated
+  # aca_magi_fraction, which is exact for lower-inclusive whole-percentage edges.
+  # The 138% floor and the 600% ceiling are enforced by the eligibility gate; this
+  # base band gives $0 below 138% FPL so the single_amount lookup covers the full
+  # domain.
   # Below 138% FPL (routed to NJ FamilyCare/Medicaid) -> $0 per member per month.
   - threshold:
       2026-01-01: 0
     amount:
       0000-01-01: 0
       2026-01-01: 0
-  # 138% through 150% FPL -> $20 per member per month. The schedule is new to the
+  # 138% to less than 150% FPL -> $20 per member per month. The schedule is new to the
   # model for PY2026, so every band is $0 before 2026-01-01. The threshold is set
   # to 1.3799 (just below the 138% floor) because aca_magi_fraction is a float32
   # variable and float32(1.38) rounds to 1.37999999..., which is just BELOW a
@@ -54,32 +62,32 @@ brackets:
     amount:
       0000-01-01: 0
       2026-01-01: 20
-  # 150% through 200% FPL -> $40.
+  # At least 150% but less than 200% FPL -> $40.
   - threshold:
-      2026-01-01: 1.5001
+      2026-01-01: 1.5
     amount:
       0000-01-01: 0
       2026-01-01: 40
-  # 200% through 250% FPL -> $50.
+  # At least 200% but less than 250% FPL -> $50.
   - threshold:
-      2026-01-01: 2.0001
+      2026-01-01: 2
     amount:
       0000-01-01: 0
       2026-01-01: 50
-  # 250% through 400% FPL -> $100.
+  # At least 250% but less than 400% FPL -> $100.
   - threshold:
-      2026-01-01: 2.5001
+      2026-01-01: 2.5
     amount:
       0000-01-01: 0
       2026-01-01: 100
-  # 400% through 600% FPL -> $50. In this band the federal APTC is $0 (the 400% FPL
+  # At least 400% and up to 600% FPL -> $50. In this band the federal APTC is $0 (the 400% FPL
   # cliff reverts for PY2026), so NJHPS is the sole premium subsidy.
   - threshold:
-      2026-01-01: 4.0001
+      2026-01-01: 4
     amount:
       0000-01-01: 0
       2026-01-01: 50
-  # Above 600% FPL (ineligible) -> $0.
+  # Above 600% FPL (ineligible; the eligibility gate excludes it) -> $0.
   - threshold:
       2026-01-01: 6.0001
     amount:
diff --git a/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/integration.yaml b/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/integration.yaml
index 372c73ac5dd..a33ade0b86f 100644
--- a/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/integration.yaml
+++ b/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/integration.yaml
@@ -1,6 +1,7 @@
 # Integration tests for New Jersey Health Plan Savings (NJHPS).
 #
-# These exercise the full chain: aca_magi_fraction (income band) ->
+# These exercise the full chain: the exact ratio of ACA MAGI to the prior-year
+# guideline (eligibility band) and aca_magi_fraction (PMPM band) ->
 # nj_njhps_member_eligible (per-person non-income enrollee gate) ->
 # nj_njhps_eligible (in_effect + band + at least one member) ->
 # nj_njhps (per-member build-up capped by SLCSP - APTC).
@@ -12,19 +13,19 @@
 #
 # Amount formula recap:
 #   n            = count of nj_njhps_member_eligible members
-#   pmpm(frac)   = 20 [1.38-1.5], 40 (1.5-2.0], 50 (2.0-2.5], 100 (2.5-4.0],
-#                  50 (4.0-6.0], 0 elsewhere   [per member per month]
+#   pmpm(frac)   = 20 [1.38-1.5), 40 [1.5-2.0), 50 [2.0-2.5), 100 [2.5-4.0),
+#                  50 [4.0-6.0], 0 elsewhere   [per member per month]
 #   base_annual  = 12 * pmpm(frac) * n
 #   residual     = max(0, slcsp_annual - aca_ptc)
 #   annual       = eligible * min(base_annual, residual)
 
-- name: Scenario 1, single adult with income deriving 200% FPL, $40 band.
+- name: Scenario 1, single adult with income deriving 200% FPL, $50 band.
   # Income path: employment_income 31_300 -> aca_magi 31_300 (single W-2 filer,
   # AGI = gross). aca_magi_fraction uses the PRIOR-year (2025) single FPG 15_650:
   #   floor(100 * 31_300 / 15_650) / 100 = floor(200.0) / 100 = 2.0.
-  # frac 2.0 is upper-inclusive in the (1.5, 2.0] band -> pmpm 40. n=1 ->
-  # base = 12*40 = 480. residual = max(0, 8_000 - 5_000) = 3_000.
-  # annual = min(480, 3_000) = 480.
+  # DOBI's plan year 2026 bands are lower-inclusive: "At least 200% FPL but less
+  # than 250% FPL" -> pmpm 50. n=1 -> base = 12*50 = 600.
+  # residual = max(0, 8_000 - 5_000) = 3_000. annual = min(600, 3_000) = 600.
   period: 2026
   absolute_error_margin: 0.01
   input:
@@ -49,7 +50,7 @@
     nj_njhps_eligible: true
     slcsp: 8_000  # annual sum of the MONTH variable
     aca_ptc: 5_000
-    nj_njhps: 480
+    nj_njhps: 600
 
 - name: Scenario 2, family of four at 300% FPL, four members, digest anchor.
   # frac 3.0 -> pmpm 100. All four pay an ACA premium -> n=4.
@@ -66,7 +67,9 @@
     tax_units:
       tax_unit:
         members: [person1, person2, person3, person4]
-        aca_magi_fraction: 3.0
+        aca_magi: 30_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 20_000
         aca_ptc: 8_000
     households:
@@ -96,7 +99,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 5.0
+        aca_magi: 50_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 7_000
         aca_ptc: 0
     households:
@@ -125,7 +130,9 @@
     tax_units:
       tax_unit:
         members: [person1, person2]
-        aca_magi_fraction: 2.2
+        aca_magi: 22_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 6_000
         aca_ptc: 5_200
     households:
@@ -153,7 +160,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.2
+        aca_magi: 12_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 6_000
         aca_ptc: 4_000
     households:
@@ -181,7 +190,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.5
+        aca_magi: 25_000
+        tax_unit_fpg:
+          2025: 10_000
         filing_status: SEPARATE
         slcsp: 9_000
         aca_ptc: 4_000
@@ -211,7 +222,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 6.0
+        aca_magi: 60_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 10_000
         aca_ptc: 0
     households:
@@ -231,10 +244,10 @@
 # ===========================================================================
 
 - name: Scenario 8, exactly 400% FPL, APTC-positive residual caps below the base.
-  # notes: 400.0 leg of the residual-flip pair. frac 4.0 (NOT > 4.0001) -> pmpm 100,
-  # n=1 -> base = 12*100 = 1_200. At the cliff the tax unit is still APTC-eligible,
+  # notes: 400.0 leg of the residual-flip pair. "At least 400% FPL" -> pmpm 50,
+  # n=1 -> base = 12*50 = 600. At the cliff the tax unit is still APTC-eligible,
   # so aca_ptc 9_500 -> residual = max(0, 10_000 - 9_500) = 500. annual =
-  # min(1_200, 500) = 500 (the post-APTC residual binds). Paired with Scenario 9.
+  # min(600, 500) = 500 (the post-APTC residual binds). Paired with Scenario 9.
   period: 2026
   absolute_error_margin: 0.01
   input:
@@ -245,7 +258,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 4.0
+        aca_magi: 40_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 10_000
         aca_ptc: 9_500
     households:
@@ -262,7 +277,7 @@
 
 - name: Scenario 9, just above 400% FPL, APTC 0 so residual is the full SLCSP.
   # notes: 400.01 leg of the residual-flip pair (same slcsp 10_000 as Scenario 8).
-  # frac 4.01 > 4.0001 -> pmpm 50, n=1 -> base = 12*50 = 600. Above the 400% cliff
+  # frac 4.01 >= 4.0 -> pmpm 50, n=1 -> base = 12*50 = 600. Above the 400% cliff
   # aca_ptc 0 -> residual = max(0, 10_000 - 0) = 10_000. annual = min(600, 10_000) =
   # 600. The residual source flips from slcsp - aptc (500) to full slcsp (10_000),
   # so the base binds -> 600. NJHPS is the sole subsidy in this band.
@@ -276,7 +291,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 4.01
+        aca_magi: 40_100
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 10_000
         aca_ptc: 0
     households:
@@ -307,7 +324,9 @@
     tax_units:
       tax_unit:
         members: [person1, person2, person3, person4]
-        aca_magi_fraction: 3.0
+        aca_magi: 30_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 20_000
         aca_ptc: 8_000
     households:
diff --git a/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/nj_njhps.yaml b/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/nj_njhps.yaml
index 5ce199518f4..a864cfb31d7 100644
--- a/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/nj_njhps.yaml
+++ b/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/nj_njhps.yaml
@@ -1,21 +1,23 @@
 # Unit tests for the New Jersey Health Plan Savings (NJHPS) amount.
 #
-# All inputs (pays_aca_premium per person, aca_magi_fraction, slcsp as an annual
-# value, aca_ptc) are supplied directly so every expected value is exactly
-# hand-verifiable and independent of the rating-area premium lookup. slcsp is a
+# All inputs (pays_aca_premium per person, aca_magi against a prior-year
+# tax_unit_fpg pinned to $10,000, slcsp as an annual value, aca_ptc) are supplied
+# directly so every expected value is exactly hand-verifiable and independent of the rating-area premium lookup. slcsp is a
 # MONTH-period variable; the amount formula annualizes it via
 # add(tax_unit, period, ["slcsp"]). Providing slcsp at the YEAR period sets the
 # annual total, so the values below are annual SLCSP.
 #
 # Formula (REQ-5):
 #   n            = count of nj_njhps_member_eligible members
-#   pmpm(frac)   = 20 [1.38-1.5], 40 (1.5-2.0], 50 (2.0-2.5], 100 (2.5-4.0],
-#                  50 (4.0-6.0], 0 elsewhere   [per member per month]
+#   pmpm(frac)   = 20 [1.38-1.5), 40 [1.5-2.0), 50 [2.0-2.5), 100 [2.5-4.0),
+#                  50 [4.0-6.0], 0 elsewhere   [per member per month]
 #   base_annual  = 12 * pmpm(frac) * n
 #   residual     = max(0, slcsp_annual - aca_ptc)
 #   annual       = eligible * min(base_annual, residual)
-# PMPM bracket thresholds are 1.5001 / 2.0001 / 2.5001 / 4.0001 / 6.0001, so a
-# fraction EXACTLY at a band boundary (e.g. 1.5 or 2.0) stays in the LOWER band.
+# PMPM bracket thresholds are 1.5 / 2 / 2.5 / 4 (DOBI's plan year 2026 bands,
+# "At least 150% FPL but less than 200% FPL" and so on), so a fraction EXACTLY at
+# a band boundary (e.g. 1.5 or 2.0) takes the HIGHER band. The 600% ceiling is
+# inclusive ("less than or equal to 600% FPL").
 
 # --- Each PMPM band with a positive residual (base binds) ---
 
@@ -32,7 +34,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.4
+        aca_magi: 14_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 6_000
         aca_ptc: 5_000
     households:
@@ -55,7 +59,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.8
+        aca_magi: 18_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 8_000
         aca_ptc: 5_000
     households:
@@ -78,7 +84,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.2
+        aca_magi: 22_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 9_000
         aca_ptc: 4_000
     households:
@@ -101,7 +109,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 3.0
+        aca_magi: 30_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 10_000
         aca_ptc: 2_000
     households:
@@ -126,7 +136,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 5.0
+        aca_magi: 50_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 7_000
         aca_ptc: 0
     households:
@@ -136,11 +148,12 @@
   output:
     nj_njhps: 600
 
-# --- Band step boundaries (upper-inclusive; lower band wins at the exact edge) ---
+# --- Band step boundaries (lower-inclusive; higher band wins at the exact edge) ---
 
-- name: Case 6, exactly 150% FPL stays in the $20 band.
-  # frac 1.5 is NOT > 1.5001, so pmpm 20 (not 40). base = 12*20 = 240.
-  # residual = max(0, 6_000 - 5_000) = 1_000. annual = min(240, 1_000) = 240.
+- name: Case 6, exactly 150% FPL is in the $40 band.
+  # DOBI's plan year 2026 bands: "At least 150% FPL but less than 200% FPL" ->
+  # pmpm 40. base = 12*40 = 480.
+  # residual = max(0, 6_000 - 5_000) = 1_000. annual = min(480, 1_000) = 480.
   period: 2026
   absolute_error_margin: 0.01
   input:
@@ -151,7 +164,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.5
+        aca_magi: 15_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 6_000
         aca_ptc: 5_000
     households:
@@ -159,10 +174,10 @@
         members: [person1]
         state_code: NJ
   output:
-    nj_njhps: 240
+    nj_njhps: 480
 
 - name: Case 7, just above 150% FPL moves to the $40 band.
-  # frac 1.51 > 1.5001 -> pmpm 40. base = 12*40 = 480.
+  # frac 1.51 >= 1.5 -> pmpm 40. base = 12*40 = 480.
   # residual = max(0, 6_000 - 5_000) = 1_000 -> annual = min(480, 1_000) = 480.
   period: 2026
   absolute_error_margin: 0.01
@@ -174,7 +189,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.51
+        aca_magi: 15_100
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 6_000
         aca_ptc: 5_000
     households:
@@ -184,9 +201,9 @@
   output:
     nj_njhps: 480
 
-- name: Case 8, exactly 200% FPL stays in the $40 band.
-  # frac 2.0 is NOT > 2.0001, so pmpm 40. base = 12*40 = 480.
-  # residual = max(0, 8_000 - 5_000) = 3_000 -> annual = min(480, 3_000) = 480.
+- name: Case 8, exactly 200% FPL is in the $50 band.
+  # "At least 200% FPL but less than 250% FPL" -> pmpm 50. base = 12*50 = 600.
+  # residual = max(0, 8_000 - 5_000) = 3_000 -> annual = min(600, 3_000) = 600.
   period: 2026
   absolute_error_margin: 0.01
   input:
@@ -197,7 +214,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 8_000
         aca_ptc: 5_000
     households:
@@ -205,10 +224,10 @@
         members: [person1]
         state_code: NJ
   output:
-    nj_njhps: 480
+    nj_njhps: 600
 
 - name: Case 9, just above 200% FPL moves to the $50 band.
-  # frac 2.01 > 2.0001 -> pmpm 50. base = 12*50 = 600.
+  # frac 2.01 >= 2.0 -> pmpm 50. base = 12*50 = 600.
   # residual = max(0, 8_000 - 5_000) = 3_000 -> annual = min(600, 3_000) = 600.
   period: 2026
   absolute_error_margin: 0.01
@@ -220,7 +239,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.01
+        aca_magi: 20_100
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 8_000
         aca_ptc: 5_000
     households:
@@ -230,9 +251,9 @@
   output:
     nj_njhps: 600
 
-- name: Case 10, exactly 250% FPL stays in the $50 band.
-  # frac 2.5 is NOT > 2.5001, so pmpm 50. base = 12*50 = 600.
-  # residual = max(0, 9_000 - 4_000) = 5_000 -> annual = min(600, 5_000) = 600.
+- name: Case 10, exactly 250% FPL is in the $100 band.
+  # "At least 250% FPL but less than 400% FPL" -> pmpm 100. base = 12*100 = 1_200.
+  # residual = max(0, 9_000 - 4_000) = 5_000 -> annual = min(1_200, 5_000) = 1_200.
   period: 2026
   absolute_error_margin: 0.01
   input:
@@ -243,7 +264,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.5
+        aca_magi: 25_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 9_000
         aca_ptc: 4_000
     households:
@@ -251,10 +274,10 @@
         members: [person1]
         state_code: NJ
   output:
-    nj_njhps: 600
+    nj_njhps: 1_200
 
 - name: Case 11, just above 250% FPL moves to the $100 band.
-  # frac 2.51 > 2.5001 -> pmpm 100. base = 12*100 = 1_200.
+  # frac 2.51 >= 2.5 -> pmpm 100. base = 12*100 = 1_200.
   # residual = max(0, 9_000 - 4_000) = 5_000 -> annual = min(1_200, 5_000) = 1_200.
   period: 2026
   absolute_error_margin: 0.01
@@ -266,7 +289,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.51
+        aca_magi: 25_100
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 9_000
         aca_ptc: 4_000
     households:
@@ -276,9 +301,9 @@
   output:
     nj_njhps: 1_200
 
-- name: Case 12, exactly 400% FPL stays in the $100 band.
-  # frac 4.0 is NOT > 4.0001, so pmpm 100. base = 12*100 = 1_200.
-  # residual = max(0, 10_000 - 1_000) = 9_000 -> annual = min(1_200, 9_000) = 1_200.
+- name: Case 12, exactly 400% FPL is in the $50 band.
+  # "At least 400% FPL but less than 450% FPL" -> pmpm 50. base = 12*50 = 600.
+  # residual = max(0, 10_000 - 1_000) = 9_000 -> annual = min(600, 9_000) = 600.
   period: 2026
   absolute_error_margin: 0.01
   input:
@@ -289,7 +314,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 4.0
+        aca_magi: 40_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 10_000
         aca_ptc: 1_000
     households:
@@ -297,10 +324,10 @@
         members: [person1]
         state_code: NJ
   output:
-    nj_njhps: 1_200
+    nj_njhps: 600
 
 - name: Case 13, just above 400% FPL moves to the $50 band.
-  # frac 4.01 > 4.0001 -> pmpm 50. Above the APTC cliff aca_ptc is 0.
+  # frac 4.01 >= 4.0 -> pmpm 50. Above the APTC cliff aca_ptc is 0.
   # base = 12*50 = 600. residual = max(0, 7_000 - 0) = 7_000 -> annual = 600.
   period: 2026
   absolute_error_margin: 0.01
@@ -312,7 +339,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 4.01
+        aca_magi: 40_100
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 7_000
         aca_ptc: 0
     households:
@@ -323,7 +352,7 @@
     nj_njhps: 600
 
 - name: Case 14, exactly 600% FPL stays in the $50 band.
-  # frac 6.0 is NOT > 6.0001, so pmpm 50. base = 12*50 = 600.
+  # frac 6.0 is NOT > 6.0001 (the ceiling is inclusive), so pmpm 50. base = 12*50 = 600.
   # residual = max(0, 8_000 - 0) = 8_000 -> annual = min(600, 8_000) = 600.
   period: 2026
   absolute_error_margin: 0.01
@@ -335,7 +364,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 6.0
+        aca_magi: 60_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 8_000
         aca_ptc: 0
     households:
@@ -357,7 +388,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 6.01
+        aca_magi: 60_100
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 8_000
         aca_ptc: 0
     households:
@@ -384,7 +417,9 @@
     tax_units:
       tax_unit:
         members: [person1, person2, person3, person4]
-        aca_magi_fraction: 3.0
+        aca_magi: 30_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 20_000
         aca_ptc: 8_000
     households:
@@ -412,7 +447,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.45
+        aca_magi: 14_500
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 5_100
         aca_ptc: 5_000
     households:
@@ -435,7 +472,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.45
+        aca_magi: 14_500
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 6_000
         aca_ptc: 5_000
     households:
@@ -461,7 +500,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.2
+        aca_magi: 22_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 5_000
         aca_ptc: 5_000
     households:
@@ -485,7 +526,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.3
+        aca_magi: 13_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 6_000
         aca_ptc: 3_000
     households:
@@ -509,7 +552,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 8_000
         aca_ptc: 0
     households:
@@ -533,7 +578,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 8_000
         aca_ptc: 5_000
     households:
@@ -557,7 +604,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2024: 10_000
         slcsp: 8_000
         aca_ptc: 5_000
     households:
@@ -588,7 +637,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.2
+        aca_magi: 22_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 0
         aca_ptc: 0
     households:
@@ -614,7 +665,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.2
+        aca_magi: 22_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 5_600
         aca_ptc: 5_000
     households:
@@ -631,10 +684,10 @@
 # residual jumps to the full slcsp. The pmpm band ALSO steps $100 -> $50 here, so
 # the pair shows the band step and the residual-source flip together.
 
-- name: Case 26, exactly 400% FPL, $100 band, APTC-positive residual caps the base.
-  # notes: 400.0 leg of the cliff pair. frac 4.0 (NOT > 4.0001) -> pmpm 100,
-  # base = 12*100 = 1_200. aca_ptc 9_500 (still APTC-eligible at the cliff) ->
-  # residual = max(0, 10_000 - 9_500) = 500 -> annual = min(1_200, 500) = 500.
+- name: Case 26, exactly 400% FPL, $50 band, APTC-positive residual caps the base.
+  # notes: 400.0 leg of the cliff pair. "At least 400% FPL" -> pmpm 50,
+  # base = 12*50 = 600. aca_ptc 9_500 (still APTC-eligible at the cliff) ->
+  # residual = max(0, 10_000 - 9_500) = 500 -> annual = min(600, 500) = 500.
   # The post-APTC residual binds (distinct from Case 12, where the base binds).
   period: 2026
   absolute_error_margin: 0.01
@@ -646,7 +699,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 4.0
+        aca_magi: 40_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 10_000
         aca_ptc: 9_500
     households:
@@ -657,8 +712,8 @@
     nj_njhps: 500
 
 - name: Case 27, just above 400% FPL, $50 band, APTC 0 so residual is full SLCSP.
-  # notes: 400.01 leg of the cliff pair (same slcsp 10_000 as Case 26). frac 4.01 >
-  # 4.0001 -> pmpm 50, base = 12*50 = 600. Above the 400% cliff aca_ptc 0 ->
+  # notes: 400.01 leg of the cliff pair (same slcsp 10_000 as Case 26). frac 4.01 >=
+  # 4.0 -> pmpm 50, base = 12*50 = 600. Above the 400% cliff aca_ptc 0 ->
   # residual = max(0, 10_000 - 0) = 10_000 -> annual = min(600, 10_000) = 600.
   # The residual source flips from slcsp - aptc (500 available) to full slcsp
   # (10_000 available), so the base now binds -> 600.
@@ -672,7 +727,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 4.01
+        aca_magi: 40_100
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 10_000
         aca_ptc: 0
     households:
@@ -700,7 +757,9 @@
     tax_units:
       tax_unit:
         members: [person1, person2, person3, person4]
-        aca_magi_fraction: 3.0
+        aca_magi: 30_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 20_000
         aca_ptc: 8_000
     households:
@@ -728,7 +787,9 @@
     tax_units:
       tax_unit:
         members: [person1, person2, person3, person4, person5]
-        aca_magi_fraction: 2.2
+        aca_magi: 22_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 30_000
         aca_ptc: 5_000
     households:
@@ -755,7 +816,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.38
+        aca_magi: 13_800
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 6_000
         aca_ptc: 3_000
     households:
@@ -783,7 +846,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.2
+        aca_magi: 22_000
+        tax_unit_fpg:
+          2025: 10_000
         slcsp: 5_000
         aca_ptc: 6_000
     households:
@@ -792,3 +857,27 @@
         state_code: NJ
   output:
     nj_njhps: 0
+
+- name: Case 32, $23,630.56 (150.994% of the 2025 guideline) is in the $40 band.
+  # The truncated fraction is 1.50, which is "at least 150%": pmpm 40, so
+  # base = 12*40 = 480. residual = max(0, 6_000 - 5_000) = 1_000 -> annual = 480.
+  period: 2026
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 40
+        pays_aca_premium: true
+    tax_units:
+      tax_unit:
+        members: [person1]
+        aca_magi: 23_630.56
+        slcsp: 6_000
+        aca_ptc: 5_000
+    households:
+      household:
+        members: [person1]
+        state_code: NJ
+  output:
+    aca_magi_fraction: 1.50
+    nj_njhps: 480
diff --git a/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/nj_njhps_eligible.yaml b/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/nj_njhps_eligible.yaml
index ca24a904635..6f404f33457 100644
--- a/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/nj_njhps_eligible.yaml
+++ b/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/nj_njhps_eligible.yaml
@@ -2,7 +2,10 @@
 #
 # nj_njhps_eligible (TaxUnit, bool, YEAR) returns:
 #   in_effect
-#   & (fpl_floor <= aca_magi_fraction <= fpl_limit)   [1.38 <= frac <= 6.0]
+#   & (fpl_floor <= ratio <= fpl_limit)   [1.38 <= ratio <= 6.0]
+# where ratio = max(aca_magi, 0) / tax_unit_fpg(prior year), the exact ratio, not
+# the truncated aca_magi_fraction. Supplied-income cases pin the prior-year
+# guideline to $10,000.
 #   & (count of nj_njhps_member_eligible > 0)
 #
 # in_effect is false before 2026-01-01 and true (open-ended) from 2026-01-01.
@@ -20,7 +23,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -41,7 +46,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.37
+        aca_magi: 13_700
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -60,7 +67,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.38
+        aca_magi: 13_800
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -81,7 +90,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 6.0
+        aca_magi: 60_000
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -100,7 +111,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 6.01
+        aca_magi: 60_100
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -122,7 +135,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -144,7 +159,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 5.0
+        aca_magi: 50_000
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -165,7 +182,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -187,7 +206,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2024: 10_000
     households:
       household:
         members: [person1]
@@ -206,10 +227,88 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2026: 10_000
     households:
       household:
         members: [person1]
         state_code: NJ
   output:
     nj_njhps_eligible: true
+
+- name: Case 11, $93,900 (exactly 600% of the 2025 guideline) is eligible.
+  period: 2026
+  input:
+    people:
+      person1:
+        age: 40
+        nj_njhps_member_eligible: true
+    tax_units:
+      tax_unit:
+        members: [person1]
+        aca_magi: 93_900
+    households:
+      household:
+        members: [person1]
+        state_code: NJ
+  output:
+    aca_magi_fraction: 6.00
+    nj_njhps_eligible: true
+
+- name: Case 12, $93,900.47 (600.003%) is ineligible though truncated to 6.00.
+  period: 2026
+  input:
+    people:
+      person1:
+        age: 40
+        nj_njhps_member_eligible: true
+    tax_units:
+      tax_unit:
+        members: [person1]
+        aca_magi: 93_900.47
+    households:
+      household:
+        members: [person1]
+        state_code: NJ
+  output:
+    aca_magi_fraction: 6.00
+    nj_njhps_eligible: false
+
+- name: Case 13, $94,055.56 (600.994%) is ineligible though truncated to 6.00.
+  period: 2026
+  input:
+    people:
+      person1:
+        age: 40
+        nj_njhps_member_eligible: true
+    tax_units:
+      tax_unit:
+        members: [person1]
+        aca_magi: 94_055.56
+    households:
+      household:
+        members: [person1]
+        state_code: NJ
+  output:
+    aca_magi_fraction: 6.00
+    nj_njhps_eligible: false
+
+- name: Case 14, $21,597 (exactly 138%) is eligible.
+  period: 2026
+  input:
+    people:
+      person1:
+        age: 40
+        nj_njhps_member_eligible: true
+    tax_units:
+      tax_unit:
+        members: [person1]
+        aca_magi: 21_597
+    households:
+      household:
+        members: [person1]
+        state_code: NJ
+  output:
+    aca_magi_fraction: 1.38
+    nj_njhps_eligible: true
diff --git a/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/nj_njhps_member_eligible.yaml b/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/nj_njhps_member_eligible.yaml
index 0aadc7215a3..03cbbb9652a 100644
--- a/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/nj_njhps_member_eligible.yaml
+++ b/policyengine_us/tests/policy/baseline/gov/states/nj/dobi/njhps/nj_njhps_member_eligible.yaml
@@ -5,11 +5,14 @@
 # PY2026 (the 400% APTC cliff reverts). It returns:
 #   pays_aca_premium
 #   & filing_status != SEPARATE
-#   & (fpl_floor <= aca_magi_fraction <= fpl_limit)   [1.38 <= frac <= 6.0]
+#   & (fpl_floor <= ratio <= fpl_limit)   [1.38 <= ratio <= 6.0]
+# where ratio = max(aca_magi, 0) / tax_unit_fpg(prior year), the exact ratio, not
+# the truncated aca_magi_fraction.
 #
 # pays_aca_premium is a Person YEAR bool supplied directly so each case is
-# independent of the immigration / MEC / TIN / coverage-gap internals. aca_magi_fraction and
-# filing_status are TaxUnit inputs. The band boundaries are inclusive on both ends:
+# independent of the immigration / MEC / TIN / coverage-gap internals. aca_magi (against a
+# prior-year tax_unit_fpg pinned to $10,000) and filing_status are TaxUnit inputs;
+# income-derived cases use the actual 2025 one-person guideline, $15,650. The band boundaries are inclusive on both ends:
 # 1.38 (138% floor) and 6.0 (600% ceiling).
 
 # --- pays_aca_premium gate ---
@@ -24,7 +27,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -42,7 +47,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -64,7 +71,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2025: 10_000
         filing_status: SEPARATE
     households:
       household:
@@ -86,7 +95,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.37
+        aca_magi: 13_700
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -105,7 +116,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 1.38
+        aca_magi: 13_800
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -124,7 +137,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 6.0
+        aca_magi: 60_000
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -143,7 +158,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 6.01
+        aca_magi: 60_100
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -166,7 +183,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 5.0
+        aca_magi: 50_000
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -187,7 +206,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
@@ -210,7 +231,9 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: 2.0
+        aca_magi: 20_000
+        tax_unit_fpg:
+          2024: 10_000
     households:
       household:
         members: [person1]
@@ -235,7 +258,9 @@
     tax_units:
       tax_unit:
         members: [person1, person2, person3, person4]
-        aca_magi_fraction: 3.0
+        aca_magi: 30_000
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1, person2, person3, person4]
@@ -260,10 +285,88 @@
     tax_units:
       tax_unit:
         members: [person1]
-        aca_magi_fraction: -0.5
+        aca_magi: -5_000
+        tax_unit_fpg:
+          2025: 10_000
     households:
       household:
         members: [person1]
         state_code: NJ
   output:
     nj_njhps_member_eligible: false
+
+- name: Case 13, $93,900 (exactly 600% of the 2025 guideline) is eligible.
+  period: 2026
+  input:
+    people:
+      person1:
+        age: 40
+        pays_aca_premium: true
+    tax_units:
+      tax_unit:
+        members: [person1]
+        aca_magi: 93_900
+    households:
+      household:
+        members: [person1]
+        state_code: NJ
+  output:
+    aca_magi_fraction: 6.00
+    nj_njhps_member_eligible: [true]
+
+- name: Case 14, $93,900.47 (600.003%) is ineligible though truncated to 6.00.
+  period: 2026
+  input:
+    people:
+      person1:
+        age: 40
+        pays_aca_premium: true
+    tax_units:
+      tax_unit:
+        members: [person1]
+        aca_magi: 93_900.47
+    households:
+      household:
+        members: [person1]
+        state_code: NJ
+  output:
+    aca_magi_fraction: 6.00
+    nj_njhps_member_eligible: [false]
+
+- name: Case 15, $94,055.56 (600.994%) is ineligible though truncated to 6.00.
+  period: 2026
+  input:
+    people:
+      person1:
+        age: 40
+        pays_aca_premium: true
+    tax_units:
+      tax_unit:
+        members: [person1]
+        aca_magi: 94_055.56
+    households:
+      household:
+        members: [person1]
+        state_code: NJ
+  output:
+    aca_magi_fraction: 6.00
+    nj_njhps_member_eligible: [false]
+
+- name: Case 16, $21,597 (exactly 138%) is eligible.
+  period: 2026
+  input:
+    people:
+      person1:
+        age: 40
+        pays_aca_premium: true
+    tax_units:
+      tax_unit:
+        members: [person1]
+        aca_magi: 21_597
+    households:
+      household:
+        members: [person1]
+        state_code: NJ
+  output:
+    aca_magi_fraction: 1.38
+    nj_njhps_member_eligible: [true]
diff --git a/policyengine_us/variables/gov/states/nj/dobi/njhps/nj_njhps_eligible.py b/policyengine_us/variables/gov/states/nj/dobi/njhps/nj_njhps_eligible.py
index 558647c50a9..77bc4e6b89d 100644
--- a/policyengine_us/variables/gov/states/nj/dobi/njhps/nj_njhps_eligible.py
+++ b/policyengine_us/variables/gov/states/nj/dobi/njhps/nj_njhps_eligible.py
@@ -24,7 +24,10 @@ class nj_njhps_eligible(Variable):
     def formula(tax_unit, period, parameters):
         p = parameters(period).gov.states.nj.dobi.njhps
         in_effect = p.in_effect
-        magi_fraction = tax_unit("aca_magi_fraction", period)
+        # The exact ratio, not the truncated aca_magi_fraction, which maps
+        # 600.00%-600.99% to 6.00 (see nj_njhps_member_eligible).
+        magi = max_(tax_unit("aca_magi", period), 0)
+        magi_fraction = magi / tax_unit("tax_unit_fpg", period.last_year)
         income_eligible = (magi_fraction >= p.fpl_floor) & (
             magi_fraction <= p.fpl_limit
         )
diff --git a/policyengine_us/variables/gov/states/nj/dobi/njhps/nj_njhps_member_eligible.py b/policyengine_us/variables/gov/states/nj/dobi/njhps/nj_njhps_member_eligible.py
index 6be048c756f..3777f6cff92 100644
--- a/policyengine_us/variables/gov/states/nj/dobi/njhps/nj_njhps_member_eligible.py
+++ b/policyengine_us/variables/gov/states/nj/dobi/njhps/nj_njhps_member_eligible.py
@@ -35,8 +35,13 @@ class nj_njhps_member_eligible(Variable):
 
     def formula(person, period, parameters):
         p = parameters(period).gov.states.nj.dobi.njhps
-        # aca_magi_fraction is a TaxUnit variable read at the person level.
-        magi_fraction = person.tax_unit("aca_magi_fraction", period)
+        # DOBI's plan year 2026 schedule runs to "less than or equal to 600%
+        # FPL" ($0 "Above 600% FPL"). Test the exact ratio, not the truncated
+        # aca_magi_fraction: truncation maps 600.00%-600.99% to 6.00, which
+        # would admit incomes above 600%. The 138% floor (">=") is unaffected
+        # by truncation. Both are TaxUnit quantities read at the person level.
+        magi = max_(person.tax_unit("aca_magi", period), 0)
+        magi_fraction = magi / person.tax_unit("tax_unit_fpg", period.last_year)
         # pays_aca_premium is the Person-level Marketplace enrollment test:
         # TIN, immigration/lawful-presence status, no ineligible minimum
         # essential coverage, the age-based premium requirement and, since