diff --git a/backend/internal/service/gateway_forward_as_chat_completions.go b/backend/internal/service/gateway_forward_as_chat_completions.go
index d03cf53531..7a7ad51f2b 100644
--- a/backend/internal/service/gateway_forward_as_chat_completions.go
+++ b/backend/internal/service/gateway_forward_as_chat_completions.go
@@ -165,12 +165,14 @@ func (s *GatewayService) ForwardAsChatCompletions(
 				Kind:               "failover",
 				Message:            upstreamMsg,
 			})
+			shouldDisable := false
 			if s.rateLimitService != nil {
-				s.rateLimitService.HandleUpstreamError(ctx, account, resp.StatusCode, resp.Header, respBody, mappedModel)
+				shouldDisable = s.rateLimitService.HandleUpstreamError(ctx, account, resp.StatusCode, resp.Header, respBody, mappedModel)
 			}
 			return nil, &UpstreamFailoverError{
-				StatusCode:   resp.StatusCode,
-				ResponseBody: respBody,
+				StatusCode:             resp.StatusCode,
+				ResponseBody:           respBody,
+				RetryableOnSameAccount: !shouldDisable && account.IsPoolMode() && account.IsPoolModeRetryableStatus(resp.StatusCode),
 			}
 		}
 
diff --git a/backend/internal/service/gateway_forward_as_responses.go b/backend/internal/service/gateway_forward_as_responses.go
index da125eff91..cdd0197eab 100644
--- a/backend/internal/service/gateway_forward_as_responses.go
+++ b/backend/internal/service/gateway_forward_as_responses.go
@@ -178,12 +178,14 @@ func (s *GatewayService) ForwardAsResponses(
 				Kind:               "failover",
 				Message:            upstreamMsg,
 			})
+			shouldDisable := false
 			if s.rateLimitService != nil {
-				s.rateLimitService.HandleUpstreamError(ctx, account, resp.StatusCode, resp.Header, respBody, mappedModel)
+				shouldDisable = s.rateLimitService.HandleUpstreamError(ctx, account, resp.StatusCode, resp.Header, respBody, mappedModel)
 			}
 			return nil, &UpstreamFailoverError{
-				StatusCode:   resp.StatusCode,
-				ResponseBody: respBody,
+				StatusCode:             resp.StatusCode,
+				ResponseBody:           respBody,
+				RetryableOnSameAccount: !shouldDisable && account.IsPoolMode() && account.IsPoolModeRetryableStatus(resp.StatusCode),
 			}
 		}
 
diff --git a/backend/internal/service/gateway_pool_mode_retry_test.go b/backend/internal/service/gateway_pool_mode_retry_test.go
new file mode 100644
index 0000000000..83455e5b95
--- /dev/null
+++ b/backend/internal/service/gateway_pool_mode_retry_test.go
@@ -0,0 +1,78 @@
+package service
+
+import (
+	"context"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGatewayCompatPoolMode429AllowsSameAccountRetry(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	tests := []struct {
+		name string
+		path string
+		body []byte
+		call func(*GatewayService, context.Context, *gin.Context, *Account, []byte) (*ForwardResult, error)
+	}{
+		{
+			name: "chat completions",
+			path: "/v1/chat/completions",
+			body: []byte(`{"model":"claude-sonnet-4-5","messages":[{"role":"user","content":"hello"}]}`),
+			call: func(svc *GatewayService, ctx context.Context, c *gin.Context, account *Account, body []byte) (*ForwardResult, error) {
+				return svc.ForwardAsChatCompletions(ctx, c, account, body, nil)
+			},
+		},
+		{
+			name: "responses",
+			path: "/v1/responses",
+			body: []byte(`{"model":"claude-sonnet-4-5","input":"hello"}`),
+			call: func(svc *GatewayService, ctx context.Context, c *gin.Context, account *Account, body []byte) (*ForwardResult, error) {
+				return svc.ForwardAsResponses(ctx, c, account, body, nil)
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			upstream := &queuedHTTPUpstreamStub{responses: []*http.Response{{
+				StatusCode: http.StatusTooManyRequests,
+				Header:     http.Header{"X-Request-Id": []string{"pool-429"}},
+				Body:       io.NopCloser(http.NoBody),
+			}}}
+			svc := &GatewayService{
+				cfg:                 &config.Config{},
+				httpUpstream:        upstream,
+				tlsFPProfileService: &TLSFingerprintProfileService{},
+			}
+			recorder := httptest.NewRecorder()
+			c, _ := gin.CreateTestContext(recorder)
+			c.Request = httptest.NewRequest(http.MethodPost, tt.path, nil)
+			account := &Account{
+				ID:       1,
+				Name:     "pool-account",
+				Platform: PlatformAnthropic,
+				Type:     AccountTypeAPIKey,
+				Credentials: map[string]any{
+					"api_key":   "test-key",
+					"pool_mode": true,
+				},
+			}
+
+			result, err := tt.call(svc, context.Background(), c, account, tt.body)
+			require.Nil(t, result)
+			var failoverErr *UpstreamFailoverError
+			require.ErrorAs(t, err, &failoverErr)
+			require.Equal(t, http.StatusTooManyRequests, failoverErr.StatusCode)
+			require.True(t, failoverErr.RetryableOnSameAccount)
+			require.Equal(t, 1, upstream.callCount)
+			require.Empty(t, recorder.Body.String())
+		})
+	}
+}