diff --git a/src/tui.tsx b/src/tui.tsx
index 7870ac5..32357e9 100644
--- a/src/tui.tsx
+++ b/src/tui.tsx
@@ -13,13 +13,32 @@ function percent(value: number) {
     return value < 0.1 && value > 0 ? "<0.1" : value.toFixed(value < 10 ? 1 : 0);
 }
 
-export function formatQuotaWindow(
-    window: QuotaWindow & { remaining: number; sessionConsumed: number },
-) {
+function resetTiming(resetsAt: number, now: number) {
+    if (!Number.isFinite(resetsAt) || resetsAt <= 0 || !Number.isFinite(now))
+        return "reset unavailable";
+    const remaining = resetsAt - now;
+    if (remaining <= 0) return "reset due";
+    if (remaining < 60_000) return "resets in <1m";
+
+    const minutes = Math.floor(remaining / 60_000);
+    const days = Math.floor(minutes / 1_440);
+    if (days > 0) {
+        const hours = Math.floor((minutes % 1_440) / 60);
+        return `resets in ${days}d${hours > 0 ? ` ${hours}h` : ""}`;
+    }
+    const hours = Math.floor(minutes / 60);
+    if (hours > 0) {
+        const rest = minutes % 60;
+        return `resets in ${hours}h${rest > 0 ? ` ${rest}m` : ""}`;
+    }
+    return `resets in ${minutes}m`;
+}
+
+export function formatQuotaWindow(window: QuotaWindow & { remaining: number }, now = Date.now()) {
     const label = window.label
         ? `${window.label} ${duration(window.seconds)}`
         : duration(window.seconds);
-    return `${label}: ${percent(window.remaining)}% left · ~${percent(window.sessionConsumed)}pp this session`;
+    return `${label}: ${percent(window.remaining)}% left · ${resetTiming(window.resetsAt, now)}`;
 }
 
 export async function loadQuotaStatus(load: () => Promise<QuotaStatus | null>) {
diff --git a/tests/quota.test.ts b/tests/quota.test.ts
index 3714d2e..6166970 100644
--- a/tests/quota.test.ts
+++ b/tests/quota.test.ts
@@ -415,18 +415,58 @@ test("polls, carries consumption across quota resets, tolerates errors, and clea
     expect(result.calls()).toBe(calls);
 });
 
-test("sidebar text places estimated percentage-point use beside latest remaining quota", () => {
+test("sidebar text places reset timing beside latest remaining quota", () => {
     expect(
-        formatQuotaWindow({
-            seconds: 604_800,
-            id: "codex:secondary",
-            label: null,
-            used: 25,
-            remaining: 75,
-            sessionConsumed: 2.25,
-            resetsAt: 0,
-        }),
-    ).toBe("7d: 75% left · ~2.3pp this session");
+        formatQuotaWindow(
+            {
+                seconds: 604_800,
+                id: "codex:secondary",
+                label: null,
+                used: 25,
+                remaining: 75,
+                resetsAt: 100_000 + 2 * 86_400_000 + 5 * 3_600_000,
+            },
+            100_000,
+        ),
+    ).toBe("7d: 75% left · resets in 2d 5h");
+});
+
+test("sidebar reset timing uses compact future units and handles boundaries", () => {
+    const now = 1_000_000;
+    const format = (resetIn: number) =>
+        formatQuotaWindow(
+            {
+                seconds: 18_000,
+                id: "codex:primary",
+                label: null,
+                used: 25,
+                remaining: 75,
+                resetsAt: now + resetIn,
+            },
+            now,
+        );
+
+    expect(format(2 * 3_600_000 + 15 * 60_000)).toBe("5h: 75% left · resets in 2h 15m");
+    expect(format(3_600_000)).toBe("5h: 75% left · resets in 1h");
+    expect(format(15 * 60_000)).toBe("5h: 75% left · resets in 15m");
+    expect(format(60_000)).toBe("5h: 75% left · resets in 1m");
+    expect(format(59_999)).toBe("5h: 75% left · resets in <1m");
+});
+
+test("sidebar reset timing distinguishes stale and unavailable timestamps", () => {
+    const window = {
+        seconds: 18_000,
+        id: "codex:primary",
+        label: "GPT-5.6 Luna",
+        used: 99.95,
+        remaining: 0.05,
+    };
+    expect(formatQuotaWindow({ ...window, resetsAt: 999 }, 1_000)).toBe(
+        "GPT-5.6 Luna 5h: <0.1% left · reset due",
+    );
+    expect(formatQuotaWindow({ ...window, resetsAt: Number.NaN }, 1_000)).toBe(
+        "GPT-5.6 Luna 5h: <0.1% left · reset unavailable",
+    );
 });
 
 test("inactive roots freeze, resume from a cached baseline on failure, and deactivate by family", async () => {
diff --git a/tests/tui.test.ts b/tests/tui.test.ts
index 73492c8..54ee7b6 100644
--- a/tests/tui.test.ts
+++ b/tests/tui.test.ts
@@ -84,7 +84,7 @@ test("built quota slot stays reactive across pending, empty, failure, update, an
 
         pending.resolve(status("plus", 75));
         await setup.waitForFrame((frame) => frame.includes("ChatGPT quota (plus)"));
-        expect(setup.captureCharFrame()).toContain("5h: 75% left · ~1.5pp this session");
+        expect(setup.captureCharFrame()).toContain("5h: 75% left · reset due");
 
         responses.push(async () => null);
         notifyUpdated();