diff --git a/apps/customer/src/app/payment/success/page.tsx b/apps/customer/src/app/payment/success/page.tsx
index b0027d3..f1c979e 100644
--- a/apps/customer/src/app/payment/success/page.tsx
+++ b/apps/customer/src/app/payment/success/page.tsx
@@ -1,9 +1,10 @@
 "use client";
 
-import { Suspense, useEffect, useMemo, useState } from "react";
+import { Suspense, useEffect, useMemo, useRef, useState } from "react";
 import { useSearchParams } from "next/navigation";
 import type { StoreRandomBoxRespDTO, StoreRespDTO } from "@compasser/api";
 import { useApproveKakaoPayMutation } from "@/shared/queries/mutation/payment/useApproveKakaoPayMutation";
+import { useCompleteAdminSettlementMutation } from "@/shared/queries/mutation/admin-settlement/useCompleteAdminSettlementMutation";
 import PurchaseCompleteModal from "@/app/(tabs)/main/store/[id]/purchase/_components/PurchaseCompleteModal";
 
 interface PendingPayment {
@@ -15,7 +16,12 @@ interface PendingPayment {
 
 function PaymentSuccessContent() {
   const searchParams = useSearchParams();
+
   const approveKakaoPayMutation = useApproveKakaoPayMutation();
+  const completeAdminSettlementMutation = useCompleteAdminSettlementMutation();
+
+  const hasRequestedRef = useRef(false);
+
   const [pendingPayment, setPendingPayment] = useState<PendingPayment | null>(
     null,
   );
@@ -29,10 +35,14 @@ function PaymentSuccessContent() {
   const pgToken = searchParams.get("pg_token");
 
   useEffect(() => {
+    if (hasRequestedRef.current) return;
+
     const savedPayment = sessionStorage.getItem("pendingPayment");
 
     if (!savedPayment || !reservationId || !pgToken) return;
 
+    hasRequestedRef.current = true;
+
     const parsedPayment = JSON.parse(savedPayment) as PendingPayment;
 
     setPendingPayment(parsedPayment);
@@ -44,12 +54,24 @@ function PaymentSuccessContent() {
       },
       {
         onSuccess: () => {
-          sessionStorage.removeItem("pendingPayment");
-          setIsCompleteModalOpen(true);
+          completeAdminSettlementMutation.mutate(
+            {
+              storeId: parsedPayment.store.storeId,
+              body: {
+                reservationIds: [reservationId],
+              },
+            },
+            {
+              onSettled: () => {
+                sessionStorage.removeItem("pendingPayment");
+                setIsCompleteModalOpen(true);
+              },
+            },
+          );
         },
       },
     );
-  }, [reservationId, pgToken, approveKakaoPayMutation]);
+  }, [reservationId, pgToken]);
 
   if (approveKakaoPayMutation.isPending) {
     return <div>결제 승인 처리 중...</div>;
diff --git a/apps/customer/src/shared/api/api.ts b/apps/customer/src/shared/api/api.ts
index e643a7f..3f6c68f 100644
--- a/apps/customer/src/shared/api/api.ts
+++ b/apps/customer/src/shared/api/api.ts
@@ -9,6 +9,7 @@ import {
   createMemberModule,
   createOrderModule,
   createPaymentModule,
+  createAdminSettlementModule,
 } from "@compasser/api";
 
 const tokenStore: TokenStore = {
@@ -44,4 +45,5 @@ export const authModule = createAuthModule(compasserApi);
 export const memberModule = createMemberModule(compasserApi);
 export const storeModule = createStoreModule(compasserApi);
 export const orderModule = createOrderModule(compasserApi);
-export const paymentModule = createPaymentModule(compasserApi);
\ No newline at end of file
+export const paymentModule = createPaymentModule(compasserApi);
+export const adminSettlementModule = createAdminSettlementModule(compasserApi);
\ No newline at end of file
diff --git a/apps/customer/src/shared/queries/mutation/admin-settlement/useCompleteAdminSettlementMutation.ts b/apps/customer/src/shared/queries/mutation/admin-settlement/useCompleteAdminSettlementMutation.ts
new file mode 100644
index 0000000..d4fb747
--- /dev/null
+++ b/apps/customer/src/shared/queries/mutation/admin-settlement/useCompleteAdminSettlementMutation.ts
@@ -0,0 +1,12 @@
+"use client";
+
+import { useMutation, useQueryClient } from "@tanstack/react-query";
+import { adminSettlementModule } from "@/shared/api/api";
+
+export const useCompleteAdminSettlementMutation = () => {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    ...adminSettlementModule.mutations.completeSettlement(queryClient),
+  });
+};
\ No newline at end of file
diff --git a/apps/owner/src/app/signup/business/page.tsx b/apps/owner/src/app/signup/business/page.tsx
index f9974b3..b4ea32e 100644
--- a/apps/owner/src/app/signup/business/page.tsx
+++ b/apps/owner/src/app/signup/business/page.tsx
@@ -3,7 +3,7 @@
 import { useEffect, useState } from "react";
 import { useRouter } from "next/navigation";
 import { Input, Button } from "@compasser/design-system";
-import { useVerifyBusinessMutation } from "@/shared/queries/mutation/auth/useVerifyBusinessMutation";
+import { useUpgradeToStoreManagerMutation } from "@/shared/queries/mutation/auth/useUpgradeToStoreManagerMutation";
 import { useOwnerSignupStore } from "@/shared/stores/ownerSignup.store";
 import {
   normalizeBusinessNumber,
@@ -13,7 +13,7 @@ import {
 
 export default function BusinessSignupPage() {
   const router = useRouter();
-  const verifyMutation = useVerifyBusinessMutation();
+  const upgradeMutation = useUpgradeToStoreManagerMutation();
 
   const signupCompleted = useOwnerSignupStore((s) => s.signupCompleted);
   const email = useOwnerSignupStore((s) => s.email);
@@ -65,26 +65,20 @@ export default function BusinessSignupPage() {
       return;
     }
 
-    verifyMutation.mutate(
-      {
-        businessLicenseNumber: value,
-        email,
+    upgradeMutation.mutate(undefined, {
+      onSuccess: (res) => {
+        if (res.alreadyUpgraded) {
+          setError("이미 사업자 등록이 완료된 계정입니다.");
+          return;
+        }
+
+        setBusinessCompleted();
+        router.push("/signup/register");
       },
-      {
-        onSuccess: (res) => {
-          if (res.alreadyUpgraded) {
-            setError("이미 사업자 등록이 완료된 계정입니다.");
-            return;
-          }
-
-          setBusinessCompleted();
-          router.push("/signup/register");
-        },
-        onError: () => {
-          setError("사업자 번호 인증에 실패했습니다.");
-        },
+      onError: () => {
+        setError("점장 승격 처리에 실패했습니다.");
       },
-    );
+    });
   };
 
   return (
@@ -115,9 +109,9 @@ export default function BusinessSignupPage() {
           size="lg"
           variant="primary"
           onClick={handleNext}
-          disabled={verifyMutation.isPending}
+          disabled={upgradeMutation.isPending}
         >
-          {verifyMutation.isPending ? "확인 중..." : "다음으로"}
+          {upgradeMutation.isPending ? "확인 중..." : "다음으로"}
         </Button>
       </div>
     </main>
diff --git a/apps/owner/src/shared/queries/mutation/auth/useUpgradeToStoreManagerMutation.ts b/apps/owner/src/shared/queries/mutation/auth/useUpgradeToStoreManagerMutation.ts
new file mode 100644
index 0000000..0cb54a8
--- /dev/null
+++ b/apps/owner/src/shared/queries/mutation/auth/useUpgradeToStoreManagerMutation.ts
@@ -0,0 +1,12 @@
+"use client";
+
+import { useMutation, useQueryClient } from "@tanstack/react-query";
+import { ownerModule } from "@/shared/api/api";
+
+export const useUpgradeToStoreManagerMutation = () => {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    ...ownerModule.mutations.upgradeToStoreManager(queryClient),
+  });
+};
\ No newline at end of file
diff --git a/apps/owner/src/shared/queries/mutation/auth/useVerifyBusinessMutation.ts b/apps/owner/src/shared/queries/mutation/auth/useVerifyBusinessMutation.ts
index 7112468..e667621 100644
--- a/apps/owner/src/shared/queries/mutation/auth/useVerifyBusinessMutation.ts
+++ b/apps/owner/src/shared/queries/mutation/auth/useVerifyBusinessMutation.ts
@@ -6,7 +6,7 @@ import { ownerModule } from "@/shared/api/api";
 export const useVerifyBusinessMutation = () => {
   const queryClient = useQueryClient();
 
-  return useMutation(
-    ownerModule.mutations.verifyBizAndUpgrade(queryClient),
-  );
+  return useMutation({
+    ...ownerModule.mutations.verifyBizAndUpgrade(queryClient),
+  });
 };
\ No newline at end of file
diff --git a/packages/api/src/domains/admin-settlement.ts b/packages/api/src/domains/admin-settlement.ts
new file mode 100644
index 0000000..a4868c8
--- /dev/null
+++ b/packages/api/src/domains/admin-settlement.ts
@@ -0,0 +1,59 @@
+// packages/api/src/domains/admin-settlement.ts
+
+import type { QueryClient } from "@tanstack/react-query";
+
+import { createMutationWithCache } from "../core/mutation";
+import type { CompasserApi } from "../core/types";
+import type {
+  AdminSettlementCompleteReqDTO,
+  AdminSettlementCompleteResponse,
+} from "../models/admin-settlement";
+
+export interface CompleteAdminSettlementParams {
+  storeId: number;
+  body: AdminSettlementCompleteReqDTO;
+}
+
+export const createAdminSettlementModule = (api: CompasserApi) => {
+  const keys = {
+    all: ["admin-settlement"] as const,
+    complete: (storeId: number) => [...keys.all, "complete", storeId] as const,
+  };
+
+  const requests = {
+    completeSettlement: async ({
+      storeId,
+      body,
+    }: CompleteAdminSettlementParams) => {
+      const { data } =
+        await api.privateClient.post<AdminSettlementCompleteResponse>(
+          `/admin/settlements/${storeId}/complete`,
+          body,
+        );
+
+      return data;
+    },
+  };
+
+  const mutations = {
+    completeSettlement: (queryClient: QueryClient) =>
+      createMutationWithCache({
+        queryClient,
+        mutationKey: [...keys.all, "complete"],
+        mutationFn: requests.completeSettlement,
+        getActions: (response, variables) => [
+          {
+            type: "set",
+            queryKey: keys.complete(variables.storeId),
+            value: response,
+          },
+          {
+            type: "invalidate",
+            queryKey: keys.all,
+          },
+        ],
+      }),
+  };
+
+  return { keys, requests, mutations };
+};
\ No newline at end of file
diff --git a/packages/api/src/index.ts b/packages/api/src/index.ts
index 25399c9..32d5350 100644
--- a/packages/api/src/index.ts
+++ b/packages/api/src/index.ts
@@ -13,6 +13,7 @@ export * from "./models/random-box";
 export * from "./models/store";
 export * from "./models/storeManager";
 export * from "./models/store-image";
+export * from "./models/admin-settlement";
 export * from "./domains/auth";
 export * from "./domains/health";
 export * from "./domains/member";
@@ -23,4 +24,5 @@ export * from "./domains/random-box";
 export * from "./domains/store";
 export * from "./domains/store-image";
 export * from "./domains/store-manager";
+export * from "./domains/admin-settlement";
 export * from "./domains/index";
\ No newline at end of file
diff --git a/packages/api/src/models/admin-settlement.ts b/packages/api/src/models/admin-settlement.ts
new file mode 100644
index 0000000..225fd04
--- /dev/null
+++ b/packages/api/src/models/admin-settlement.ts
@@ -0,0 +1,16 @@
+import type { ApiResponse } from "../core/types";
+
+export interface AdminSettlementCompleteReqDTO {
+  reservationIds: number[];
+}
+
+export interface AdminSettlementCompleteRespDTO {
+  storeId: number;
+  storeName: string;
+  count: number;
+  totalAmount: number;
+  message: string;
+}
+
+export type AdminSettlementCompleteResponse =
+  ApiResponse<AdminSettlementCompleteRespDTO>;
\ No newline at end of file