diff --git a/src/cron/schedule.test.ts b/src/cron/schedule.test.ts
index 210e2860a..f38bc6a2d 100644
--- a/src/cron/schedule.test.ts
+++ b/src/cron/schedule.test.ts
@@ -23,4 +23,12 @@ describe("cron schedule", () => {
     );
     expect(next).toBe(anchor + 30_000);
   });
+
+  it("computes next run for every schedule when anchorMs is not provided", () => {
+    const now = Date.parse("2025-12-13T00:00:00.000Z");
+    const next = computeNextRunAtMs({ kind: "every", everyMs: 30_000 }, now);
+
+    // Should return nowMs + everyMs, not nowMs (which would cause infinite loop)
+    expect(next).toBe(now + 30_000);
+  });
 });
diff --git a/src/cron/schedule.ts b/src/cron/schedule.ts
index 4c4308da8..bdf92ea13 100644
--- a/src/cron/schedule.ts
+++ b/src/cron/schedule.ts
@@ -12,9 +12,9 @@ export function computeNextRunAtMs(
   if (schedule.kind === "every") {
     const everyMs = Math.max(1, Math.floor(schedule.everyMs));
     const anchor = Math.max(0, Math.floor(schedule.anchorMs ?? nowMs));
-    if (nowMs <= anchor) return anchor;
+    if (nowMs < anchor) return anchor;
     const elapsed = nowMs - anchor;
-    const steps = Math.floor((elapsed + everyMs - 1) / everyMs);
+    const steps = Math.max(1, Math.floor((elapsed + everyMs - 1) / everyMs));
     return anchor + steps * everyMs;
   }