diff --git a/frontend/src/api/indirectPurchases.ts b/frontend/src/api/indirectPurchases.ts
index 3a456b5..a073e60 100644
--- a/frontend/src/api/indirectPurchases.ts
+++ b/frontend/src/api/indirectPurchases.ts
@@ -84,7 +84,7 @@ export interface CreateIndirectPRInput {
   estimatedPrice?: number | null;
   expenseCodeId: number;
   budgetPeriod: string; // YYYY-MM
-  preferredSupplierId?: number | null;
+  preferredSupplierId: number;
   priority?: 'LOW' | 'NORMAL' | 'HIGH' | 'URGENT';
   requiredByDate?: string | null;
   notes?: string | null;
diff --git a/frontend/src/pages/purchases/IndirectPurchasesTab.tsx b/frontend/src/pages/purchases/IndirectPurchasesTab.tsx
index 156c869..73956bc 100644
--- a/frontend/src/pages/purchases/IndirectPurchasesTab.tsx
+++ b/frontend/src/pages/purchases/IndirectPurchasesTab.tsx
@@ -612,6 +612,7 @@ export function IndirectPurchasesTab() {
               <Form.Item
                 name="preferredSupplierId"
                 label="Поставщик (IND_)"
+                rules={[{ required: true, message: 'Выберите поставщика' }]}
               >
                 <Select
                   allowClear
@@ -811,6 +812,7 @@ export function IndirectPurchasesTab() {
                       estimatedPrice: vals.estimatedPrice,
                       deliveryCost: vals.deliveryCost,
                       notes: vals.notes,
+                      preferredSupplierId: vals.preferredSupplierId,
                     } as any);
                     message.success('Сохранено');
                     setEditingPR(false);
@@ -820,6 +822,14 @@ export function IndirectPurchasesTab() {
                   } catch { message.error('Ошибка сохранения'); }
                   finally { setActionLoading(false); }
                 }}>
+                  <Form.Item name="preferredSupplierId" label="Поставщик" rules={[{ required: true, message: 'Выберите поставщика' }]}>
+                    <Select
+                      showSearch
+                      optionFilterProp="label"
+                      placeholder="Выберите поставщика"
+                      options={suppliers.map((s) => ({ value: s.id, label: s.companyName }))}
+                    />
+                  </Form.Item>
                   <Form.Item name="quantity" label="Количество" rules={[{ required: true }]}>
                     <InputNumber style={{ width: '100%' }} min={0.01} />
                   </Form.Item>
@@ -862,6 +872,7 @@ export function IndirectPurchasesTab() {
                     estimatedPrice: selectedPR.estimatedPrice ? Number(selectedPR.estimatedPrice) : null,
                     deliveryCost: (selectedPR as any).deliveryCost ? Number((selectedPR as any).deliveryCost) : null,
                     notes: selectedPR.notes ?? '',
+                    preferredSupplierId: (selectedPR as any).preferredSupplierId ?? undefined,
                   });
                   setEditingPR(true);
                 }}>
diff --git a/src/modules/purchases/indirect-purchases.schemas.ts b/src/modules/purchases/indirect-purchases.schemas.ts
index 0766cea..fd77bfc 100644
--- a/src/modules/purchases/indirect-purchases.schemas.ts
+++ b/src/modules/purchases/indirect-purchases.schemas.ts
@@ -12,7 +12,7 @@ export const createIndirectPRSchema = z.object({
   estimatedPrice: z.number().min(0).optional().nullable(),
   expenseCodeId: z.number().int().positive('Статья расходов обязательна'),
   budgetPeriod: z.string().regex(/^\d{4}-\d{2}$/, 'Период должен быть в формате YYYY-MM'),
-  preferredSupplierId: z.number().int().positive().optional().nullable(),
+  preferredSupplierId: z.number().int().positive({ message: 'Выберите поставщика' }),
   priority: z.enum(PURCHASE_PRIORITIES).default('NORMAL'),
   requiredByDate: z.coerce.date().optional().nullable(),
   notes: z.string().optional().nullable(),
diff --git a/src/modules/purchases/purchases.schemas.ts b/src/modules/purchases/purchases.schemas.ts
index 7850958..4c4e2e7 100644
--- a/src/modules/purchases/purchases.schemas.ts
+++ b/src/modules/purchases/purchases.schemas.ts
@@ -33,6 +33,7 @@ export const updatePurchaseRequirementSchema = z.object({
   requiredByDate: z.coerce.date().optional().nullable(),
   notes: z.string().optional().nullable(),
   supplierHintId: z.number().int().positive().optional().nullable(),
+  preferredSupplierId: z.number().int().positive().optional().nullable(),
   inStock: z.boolean().optional(),
 });
 
diff --git a/src/modules/purchases/purchases.service.ts b/src/modules/purchases/purchases.service.ts
index 168ca7c..7077db7 100644
--- a/src/modules/purchases/purchases.service.ts
+++ b/src/modules/purchases/purchases.service.ts
@@ -233,6 +233,13 @@ export class PurchaseService {
     if ((input as any).deliveryCost !== undefined) {
       data.deliveryCost = (input as any).deliveryCost != null ? Number((input as any).deliveryCost) : null;
     }
+    if (input.preferredSupplierId !== undefined) {
+      if (input.preferredSupplierId != null) {
+        const supplier = await this.prisma.supplier.findUnique({ where: { id: input.preferredSupplierId } });
+        if (!supplier) httpError(404, 'Поставщик не найден');
+      }
+      data.preferredSupplierId = input.preferredSupplierId;
+    }
     if ((input as any).isTemplate !== undefined) data.isTemplate = (input as any).isTemplate;
     if ((input as any).templateName !== undefined) data.templateName = (input as any).templateName;