diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f5dc54bee..81e8cb45c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -315,13 +315,16 @@ jobs:
             platform: win
             target: nsis
             arch: x64
-            jobTimeoutMinutes: 120
+            # Without a Rust cache this row took 108 minutes on 2026-11-13.
+            jobTimeoutMinutes: 180
           - label: Windows arm64
             runner: windows-11-vs2026-arm
             platform: win
             target: nsis
             arch: arm64
-            jobTimeoutMinutes: 120
+            # Without a Rust cache this row took 113 minutes on a pull request on
+            # 2026-11-13, and was cancelled at its 120-minute limit on main.
+            jobTimeoutMinutes: 180
     steps: &native_desktop_steps
       - name: Checkout
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
diff --git a/docs/operations/ci.md b/docs/operations/ci.md
index a6cbcc4c8..0d1e0d8b8 100644
--- a/docs/operations/ci.md
+++ b/docs/operations/ci.md
@@ -140,7 +140,8 @@ the merge.
   path on every pull request; the job installs `dump_syms` 2.3.9 for it, and
   Rust Cache keeps the binary in `~/.cargo/bin`.
   Each matrix row declares its complete-job budget:
-  330 minutes for each macOS row and 120 minutes for the other four targets.
+  330 minutes for each macOS row, 180 minutes for each Windows row, and 120
+  minutes for each Linux row.
   That budget includes setup, host tests, the macOS optimized exception-recovery
   probe, and native packaging without shortening any check or test-owned deadline.
   Debug host tests cannot warm the optimized artifacts. The exception probe is
@@ -258,7 +259,7 @@ recently used entries above that. Which workflow saves which entry:
 
 A job cancelled by `timeout-minutes` or by a newer run skips the cache post
 step, so the Check and Test budgets above include a cold compile. Native
-desktop keeps its 120-minute and 330-minute row budgets.
+desktop keeps its 120-minute, 180-minute and 330-minute row budgets.
 
 Six native-desktop entries of about 1.6 GB each are about 10 GB on their own,
 before Check, Test, Crash smoke, Linux Git, and the setup-vp caches. Eviction
diff --git a/scripts/ci-platform-contract.test.ts b/scripts/ci-platform-contract.test.ts
index 0a1269a66..fd0451e83 100644
--- a/scripts/ci-platform-contract.test.ts
+++ b/scripts/ci-platform-contract.test.ts
@@ -332,7 +332,9 @@ describe("cross-platform CI contract", () => {
       // macOS builds the unoptimized host test graph and the optimized native
       // package with its symbols.
       // With a Rust cache the macOS rows took 215 and 228 minutes on 2026-11-13.
-      const minimum = row.platform === "mac" ? 330 : 120;
+      // Without a Rust cache the Windows rows took 108 and 113 minutes on the
+      // same day, and Windows arm64 was then cancelled at 120 minutes on main.
+      const minimum = row.platform === "mac" ? 330 : row.platform === "win" ? 180 : 120;
       expect(row.jobTimeoutMinutes, String(row.label)).toBeGreaterThanOrEqual(minimum);
     }
   });