diff --git a/src/pages/subscription/Subscription.css b/src/pages/subscription/Subscription.css
index ca355dd..8282168 100644
--- a/src/pages/subscription/Subscription.css
+++ b/src/pages/subscription/Subscription.css
@@ -1078,6 +1078,13 @@
     font-weight: 500;
 }
 
+.sub-form-hint {
+    font-size: 10px;
+    color: var(--text-dim);
+    opacity: 0.7;
+    line-height: 1.4;
+}
+
 .sub-form-input {
     background: var(--bg-tertiary);
     border: 1px solid var(--line);
diff --git a/src/pages/subscription/Subscription.jsx b/src/pages/subscription/Subscription.jsx
index 6e764db..b800220 100644
--- a/src/pages/subscription/Subscription.jsx
+++ b/src/pages/subscription/Subscription.jsx
@@ -1360,10 +1360,13 @@ function ProfileTab() {
                             <input
                                 className="sub-form-input"
                                 type="number"
+                                min="0"
+                                max="300"
                                 value={profile.income_level || ''}
                                 onChange={e => handleChange('income_level', e.target.value)}
-                                placeholder="도시근로자 평균 대비 %"
+                                placeholder="도시근로자 월평균 대비 %"
                             />
+                            <span className="sub-form-hint">청년 ≤140 / 신혼·생애최초 ≤160 / 신생아 ≤200 · 미입력 시 검증 생략</span>
                         </label>
                     </div>
                 </div>