diff --git a/app/Http/Controllers/Admin/Master/RawMaterialController.php b/app/Http/Controllers/Admin/Master/RawMaterialController.php
index 661bd0f..3bf53cc 100644
--- a/app/Http/Controllers/Admin/Master/RawMaterialController.php
+++ b/app/Http/Controllers/Admin/Master/RawMaterialController.php
@@ -5,9 +5,11 @@
 use App\Enums\RawMaterialUnit;
 use App\Http\Controllers\Concerns\FlashesEntityMessage;
 use App\Http\Controllers\Concerns\ParsesDataTableQuery;
+use App\Enums\CuttingStatus;
 use App\Http\Controllers\Controller;
 use App\Http\Requests\Admin\Master\RawMaterialRequest;
 use App\Http\Requests\Admin\ToggleStatusRequest;
+use App\Models\CuttingMaterial;
 use App\Models\RawMaterial;
 use App\Services\Master\RawMaterialService;
 use App\Support\Media\MediaPresenter;
@@ -84,6 +86,27 @@ public function destroy(Request $request, RawMaterial $rawMaterial): RedirectRes
         return redirect()->route('admin.master.raw_materials.index');
     }
 
+    public function checkVariantUsage(Request $request): JsonResponse
+    {
+        $priceIds = $request->query('price_ids', []);
+
+        if (! is_array($priceIds) || $priceIds === []) {
+            return response()->json(['in_use' => []]);
+        }
+
+        $priceIds = array_map('intval', $priceIds);
+
+        $inUse = CuttingMaterial::query()
+            ->whereIn('raw_material_price_id', $priceIds)
+            ->whereHas('cutting', fn ($q) => $q->where('status', '!=', CuttingStatus::COMPLETED))
+            ->pluck('raw_material_price_id')
+            ->unique()
+            ->values()
+            ->toArray();
+
+        return response()->json(['in_use' => $inUse]);
+    }
+
     public function toggleStatus(ToggleStatusRequest $request, RawMaterial $rawMaterial): RedirectResponse
     {
         $this->rawMaterialService->toggleStatus($rawMaterial, $request->validated(), $request->user());
diff --git a/app/Services/Master/RawMaterialService.php b/app/Services/Master/RawMaterialService.php
index 1e1ee5a..d2dd82e 100644
--- a/app/Services/Master/RawMaterialService.php
+++ b/app/Services/Master/RawMaterialService.php
@@ -313,6 +313,27 @@ private function ensureNotUsedInActiveCutting(RawMaterial $rawMaterial): void
         }
     }
 
+    private function ensurePricesNotUsedInActiveCutting(array $priceIds): void
+    {
+        $usedPriceIds = CuttingMaterial::query()
+            ->whereIn('raw_material_price_id', $priceIds)
+            ->whereHas('cutting', fn ($q) => $q->where('status', '!=', CuttingStatus::COMPLETED))
+            ->pluck('raw_material_price_id')
+            ->unique()
+            ->toArray();
+
+        if ($usedPriceIds !== []) {
+            $variantNames = RawMaterialPrice::whereIn('id', $usedPriceIds)
+                ->pluck('variant')
+                ->unique()
+                ->implode(', ');
+
+            throw ValidationException::withMessages([
+                'prices' => "Variant '{$variantNames}' tidak dapat dihapus karena masih digunakan dalam proses cutting yang belum selesai.",
+            ]);
+        }
+    }
+
     public function applyToggleStatus(OwnerVerificationRequest $verificationRequest): void
     {
         $rawMaterial = $verificationRequest->subject;
@@ -353,6 +374,15 @@ private function applyPayloadToRawMaterial(
             ->map(fn ($id) => (int) $id)
             ->all();
 
+        $deletingPriceIds = $rawMaterial->prices()
+            ->whereNotIn('id', $submittedPriceIds)
+            ->pluck('id')
+            ->toArray();
+
+        if ($deletingPriceIds !== []) {
+            $this->ensurePricesNotUsedInActiveCutting($deletingPriceIds);
+        }
+
         $rawMaterial->prices()
             ->whereNotIn('id', $submittedPriceIds)
             ->get()
diff --git a/resources/js/pages/admin/master/raw-materials/form/RawMaterialForm.vue b/resources/js/pages/admin/master/raw-materials/form/RawMaterialForm.vue
index 4ce8f30..cae8aa7 100644
--- a/resources/js/pages/admin/master/raw-materials/form/RawMaterialForm.vue
+++ b/resources/js/pages/admin/master/raw-materials/form/RawMaterialForm.vue
@@ -94,7 +94,23 @@ const useSamePrice = ref(prices.value.length <= 1 || allPricesHaveSameValue());
 const showDeleteConfirm = ref(false);
 const priceToDelete = ref<string | null>(null);
 
-function confirmRemovePrice(clientId: string) {
+async function confirmRemovePrice(clientId: string) {
+    const price = prices.value.find((p) => p.client_id === clientId);
+
+    if (price?.id) {
+        try {
+            const res = await fetch(`/admin/master/raw-materials/check-variant-usage?price_ids[]=${price.id}`);
+            const data: { in_use: number[] } = await res.json();
+
+            if (data.in_use?.includes(price.id)) {
+                toast.error(`Varian "${price.variant}" tidak dapat dihapus karena masih digunakan dalam proses cutting yang belum selesai.`);
+                return;
+            }
+        } catch {
+            // proceed to confirm dialog if check fails
+        }
+    }
+
     priceToDelete.value = clientId;
     showDeleteConfirm.value = true;
 }
@@ -223,6 +239,9 @@ function submit() {
             if (errors.system) {
                 toast.error(errors.system);
             }
+            if (errors.prices) {
+                toast.error(errors.prices);
+            }
         },
     });
 }
diff --git a/routes/web.php b/routes/web.php
index e532744..b451408 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -146,6 +146,9 @@
             Route::prefix('raw-materials')->name('raw_materials.')
                 ->middleware('permission:'.Permission::RAW_MATERIALS_VIEW->value)
                 ->group(function () {
+                    Route::get('check-variant-usage', [RawMaterialController::class, 'checkVariantUsage'])
+                        ->name('check_variant_usage');
+
                     Route::get('create', [RawMaterialController::class, 'create'])
                         ->middleware('permission:'.Permission::RAW_MATERIALS_CREATE->value)
                         ->name('create');