diff --git a/Modules/Primaya/Http/Controllers/Api/MemberController.php b/Modules/Primaya/Http/Controllers/Api/MemberController.php
index 19cee3f0..f27a2075 100644
--- a/Modules/Primaya/Http/Controllers/Api/MemberController.php
+++ b/Modules/Primaya/Http/Controllers/Api/MemberController.php
@@ -84,7 +84,9 @@ class MemberController extends Controller
                     'benefits.description',
                     'benefits.code',
                     'corporate_benefits.corporate_id',
-                    'plans.service_code'
+                    'plans.service_code',
+                    'corporate_benefits.cashless_percentage',
+                    'corporate_benefits.reimbursement_percentage',
                     )
                 ->get();
                 $res_data['benefits'] = $benefits;
@@ -203,4 +205,119 @@ class MemberController extends Controller
 
         }
     }
+
+    public function calculateBenefit(Request $request)
+    {
+        $request->validate([
+            'member_id'  => 'required|integer',
+            'benefit_id' => 'required|integer',
+            'biaya'      => 'required|numeric|min:0'
+        ]);
+
+        $memberId  = $request->member_id;
+        $benefitId = $request->benefit_id;
+        $biaya     = $request->biaya;
+
+        // ===============================
+        // Ambil member
+        // ===============================
+        $member = DB::table('members')->where('id', $memberId)->first();
+
+        if (!$member) {
+            return ApiResponse::apiResponse("Data Not Found", [], "Member not found", 404);
+        }
+
+        // ===============================
+        // Ambil corporate employee
+        // ===============================
+        $corporateEmployee = DB::table('corporate_employees')
+            ->where('member_id', $memberId)
+            ->first();
+
+        if (!$corporateEmployee) {
+            return ApiResponse::apiResponse("Data Not Found", [], "Corporate not found", 404);
+        }
+
+        // ===============================
+        // Ambil Plan OP
+        // ===============================
+        $planMember = MemberPlan::where('member_id', $memberId)->pluck('plan_id');
+
+        $plan = Plan::whereIn('id', $planMember)
+            ->where('service_code', 'OP')
+            ->first();
+
+        if (!$plan) {
+            return ApiResponse::apiResponse("Data Not Found", [], "Plan OP not found", 404);
+        }
+
+        // ===============================
+        // Ambil Benefit
+        // ===============================
+        $corporateBenefit = CorporateBenefit::where('plan_id', $plan->id)
+            ->where('benefit_id', $benefitId)
+            ->first();
+
+        if (!$corporateBenefit) {
+            return ApiResponse::apiResponse("Data Not Found", [], "Benefit not found", 404);
+        }
+
+        // ===============================
+        // Hitung Used Limit (PAKAI HELPER)
+        // ===============================
+        $benefitData = [
+            [
+                'id' => $benefitId,
+                'limit_amount' => $corporateBenefit->limit_amount ?? 0,
+                'limit_amount_plan' => $plan->limit_rules ?? 0,
+                'family_plan' => $plan->family_plan ?? 'S',
+                'max_frequency_period' => $corporateBenefit->max_frequency_period ?? 0
+            ]
+        ];
+
+        $memberUsage = Helper::getUsageMember(
+            $corporateEmployee->corporate_id,
+            $memberId,
+            $benefitData
+        );
+
+        $usedLimitArray = json_decode($memberUsage, true);
+        $usedLimit = $usedLimitArray[$benefitId] ?? 0;
+
+        // ===============================
+        // Limit Logic
+        // ===============================
+        $limitPlan = $plan->limit_rules ?? 0;
+        $sisaLimit = $limitPlan - $usedLimit;
+
+        if ($sisaLimit < 0) {
+            $sisaLimit = 0;
+        }
+
+        // ===============================
+        // Percentage Logic
+        // ===============================
+        $cashlessPercentage = $corporateBenefit->cashless_percentage ?? 0;
+
+        $ditanggungPercentage = ($biaya * $cashlessPercentage) / 100;
+
+        $ditanggungFinal = min($ditanggungPercentage, $sisaLimit);
+
+        $sisaBayar = $biaya - $ditanggungFinal;
+
+        // ===============================
+        // Response
+        // ===============================
+        return ApiResponse::apiResponse("Success", [
+            'member_id' => $memberId,
+            'benefit_id' => $benefitId,
+            'biaya' => $biaya,
+            'cashless_percentage' => $cashlessPercentage,
+            'limit_plan' => $limitPlan,
+            'used_limit' => $usedLimit,
+            'sisa_limit' => $sisaLimit,
+            'ditanggung_asuransi' => $ditanggungFinal,
+            'sisa_bayar_member' => $sisaBayar
+        ], "Calculation successful", 200);
+    }
 }
diff --git a/Modules/Primaya/Routes/api.php b/Modules/Primaya/Routes/api.php
index a90a9e7b..7af136b3 100644
--- a/Modules/Primaya/Routes/api.php
+++ b/Modules/Primaya/Routes/api.php
@@ -40,6 +40,8 @@ Route::prefix('v1')->group(function () {
                 Route::post('request-log', 'requestLog');
             });
 
+            Route::post('calculate-benefit', [MemberController::class, 'calculateBenefit']);
+
             Route::prefix('master')->group(function () {
 
                 Route::get('specialities', [MasterController::class, 'specialities']);