diff --git a/app/Http/Requests/Client/ClientStoreRequest.php b/app/Http/Requests/Client/ClientStoreRequest.php
index ac57fbe..51c344d 100644
--- a/app/Http/Requests/Client/ClientStoreRequest.php
+++ b/app/Http/Requests/Client/ClientStoreRequest.php
@@ -3,6 +3,7 @@
 namespace App\Http\Requests\Client;
 
 use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
 
 class ClientStoreRequest extends FormRequest
 {
@@ -17,7 +18,10 @@ public function rules(): array
             'client_group_id' => 'nullable|integer',
             'client_code' => 'required|string|max:50',
             'name' => 'required|string|max:100',
-            'client_type' => 'nullable|in:매입,매출,매입매출',
+            'client_type' => [
+                'nullable',
+                Rule::exists('common_codes', 'code')->where('code_group', 'client_type'),
+            ],
             // 연락처 정보
             'contact_person' => 'nullable|string|max:100',
             'phone' => 'nullable|string|max:20',
@@ -48,7 +52,10 @@ public function rules(): array
             'bad_debt_amount' => 'nullable|numeric|min:0',
             'bad_debt_receive_date' => 'nullable|date',
             'bad_debt_end_date' => 'nullable|date|after_or_equal:bad_debt_receive_date',
-            'bad_debt_progress' => 'nullable|in:협의중,소송중,회수완료,대손처리',
+            'bad_debt_progress' => [
+                'nullable',
+                Rule::exists('common_codes', 'code')->where('code_group', 'bad_debt_progress'),
+            ],
             // 기타
             'memo' => 'nullable|string',
             'is_active' => 'nullable|boolean',
diff --git a/app/Http/Requests/Client/ClientUpdateRequest.php b/app/Http/Requests/Client/ClientUpdateRequest.php
index 115deec..636001f 100644
--- a/app/Http/Requests/Client/ClientUpdateRequest.php
+++ b/app/Http/Requests/Client/ClientUpdateRequest.php
@@ -3,6 +3,7 @@
 namespace App\Http\Requests\Client;
 
 use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
 
 class ClientUpdateRequest extends FormRequest
 {
@@ -17,7 +18,10 @@ public function rules(): array
             'client_group_id' => 'nullable|integer',
             'client_code' => 'sometimes|string|max:50',
             'name' => 'sometimes|string|max:100',
-            'client_type' => 'nullable|in:매입,매출,매입매출',
+            'client_type' => [
+                'nullable',
+                Rule::exists('common_codes', 'code')->where('code_group', 'client_type'),
+            ],
             // 연락처 정보
             'contact_person' => 'nullable|string|max:100',
             'phone' => 'nullable|string|max:20',
@@ -48,7 +52,10 @@ public function rules(): array
             'bad_debt_amount' => 'nullable|numeric|min:0',
             'bad_debt_receive_date' => 'nullable|date',
             'bad_debt_end_date' => 'nullable|date|after_or_equal:bad_debt_receive_date',
-            'bad_debt_progress' => 'nullable|in:협의중,소송중,회수완료,대손처리',
+            'bad_debt_progress' => [
+                'nullable',
+                Rule::exists('common_codes', 'code')->where('code_group', 'bad_debt_progress'),
+            ],
             // 기타
             'memo' => 'nullable|string',
             'is_active' => 'nullable|boolean',
diff --git a/app/Http/Requests/Pricing/PriceStoreRequest.php b/app/Http/Requests/Pricing/PriceStoreRequest.php
index 588eb00..93f1d44 100644
--- a/app/Http/Requests/Pricing/PriceStoreRequest.php
+++ b/app/Http/Requests/Pricing/PriceStoreRequest.php
@@ -16,7 +16,11 @@ public function rules(): array
     {
         return [
             // 품목 연결 (필수)
-            'item_type_code' => 'required|string|in:PRODUCT,MATERIAL',
+            'item_type_code' => [
+                'required',
+                'string',
+                Rule::exists('common_codes', 'code')->where('code_group', 'item_type'),
+            ],
             'item_id' => 'required|integer',
             'client_group_id' => 'nullable|integer',
 
@@ -26,7 +30,7 @@ public function rules(): array
             'loss_rate' => 'nullable|numeric|min:0|max:100',
 
             // 판매가 정보
-            'margin_rate' => 'nullable|numeric|min:0|max:100',
+            'margin_rate' => 'nullable|numeric|min:0',  // max 제한 제거 (100% 초과 마진 허용)
             'sales_price' => 'nullable|numeric|min:0',
             'rounding_rule' => ['nullable', Rule::in(['round', 'ceil', 'floor'])],
             'rounding_unit' => ['nullable', Rule::in([1, 10, 100, 1000])],
diff --git a/app/Http/Requests/Pricing/PriceUpdateRequest.php b/app/Http/Requests/Pricing/PriceUpdateRequest.php
index 267928a..d0bcdd6 100644
--- a/app/Http/Requests/Pricing/PriceUpdateRequest.php
+++ b/app/Http/Requests/Pricing/PriceUpdateRequest.php
@@ -16,7 +16,11 @@ public function rules(): array
     {
         return [
             // 품목 연결 (선택)
-            'item_type_code' => 'sometimes|string|in:PRODUCT,MATERIAL',
+            'item_type_code' => [
+                'sometimes',
+                'string',
+                Rule::exists('common_codes', 'code')->where('code_group', 'item_type'),
+            ],
             'item_id' => 'sometimes|integer',
             'client_group_id' => 'nullable|integer',
 
@@ -26,7 +30,7 @@ public function rules(): array
             'loss_rate' => 'nullable|numeric|min:0|max:100',
 
             // 판매가 정보
-            'margin_rate' => 'nullable|numeric|min:0|max:100',
+            'margin_rate' => 'nullable|numeric|min:0',  // max 제한 제거 (100% 초과 마진 허용)
             'sales_price' => 'nullable|numeric|min:0',
             'rounding_rule' => ['nullable', Rule::in(['round', 'ceil', 'floor'])],
             'rounding_unit' => ['nullable', Rule::in([1, 10, 100, 1000])],
diff --git a/app/Http/Requests/Quote/QuoteStoreRequest.php b/app/Http/Requests/Quote/QuoteStoreRequest.php
index acd2864..c484c65 100644
--- a/app/Http/Requests/Quote/QuoteStoreRequest.php
+++ b/app/Http/Requests/Quote/QuoteStoreRequest.php
@@ -2,8 +2,8 @@
 
 namespace App\Http\Requests\Quote;
 
-use App\Models\Quote\Quote;
 use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
 
 class QuoteStoreRequest extends FormRequest
 {
@@ -33,7 +33,10 @@ public function rules(): array
             'site_code' => 'nullable|string|max:50',
 
             // 제품 정보
-            'product_category' => 'nullable|in:'.Quote::CATEGORY_SCREEN.','.Quote::CATEGORY_STEEL,
+            'product_category' => [
+                'nullable',
+                Rule::exists('common_codes', 'code')->where('code_group', 'product_category'),
+            ],
             'product_id' => 'nullable|integer',
             'product_code' => 'nullable|string|max:50',
             'product_name' => 'nullable|string|max:100',
diff --git a/app/Http/Requests/Quote/QuoteUpdateRequest.php b/app/Http/Requests/Quote/QuoteUpdateRequest.php
index 7b70e65..c6137b0 100644
--- a/app/Http/Requests/Quote/QuoteUpdateRequest.php
+++ b/app/Http/Requests/Quote/QuoteUpdateRequest.php
@@ -2,8 +2,8 @@
 
 namespace App\Http\Requests\Quote;
 
-use App\Models\Quote\Quote;
 use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
 
 class QuoteUpdateRequest extends FormRequest
 {
@@ -31,7 +31,10 @@ public function rules(): array
             'site_code' => 'nullable|string|max:50',
 
             // 제품 정보
-            'product_category' => 'nullable|in:'.Quote::CATEGORY_SCREEN.','.Quote::CATEGORY_STEEL,
+            'product_category' => [
+                'nullable',
+                Rule::exists('common_codes', 'code')->where('code_group', 'product_category'),
+            ],
             'product_id' => 'nullable|integer',
             'product_code' => 'nullable|string|max:50',
             'product_name' => 'nullable|string|max:100',
diff --git a/database/migrations/2025_12_20_222346_add_client_and_quote_codes_to_common_codes.php b/database/migrations/2025_12_20_222346_add_client_and_quote_codes_to_common_codes.php
new file mode 100644
index 0000000..a386e34
--- /dev/null
+++ b/database/migrations/2025_12_20_222346_add_client_and_quote_codes_to_common_codes.php
@@ -0,0 +1,91 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        $now = now();
+
+        // client_type 코드 그룹
+        $clientTypes = [
+            ['code' => 'PURCHASE', 'name' => '매입', 'sort_order' => 1],
+            ['code' => 'SALES', 'name' => '매출', 'sort_order' => 2],
+            ['code' => 'BOTH', 'name' => '매입매출', 'sort_order' => 3],
+        ];
+
+        foreach ($clientTypes as $item) {
+            DB::table('common_codes')->updateOrInsert(
+                ['code_group' => 'client_type', 'code' => $item['code']],
+                [
+                    'code_group' => 'client_type',
+                    'code' => $item['code'],
+                    'name' => $item['name'],
+                    'sort_order' => $item['sort_order'],
+                    'is_active' => true,
+                    'created_at' => $now,
+                    'updated_at' => $now,
+                ]
+            );
+        }
+
+        // bad_debt_progress 코드 그룹 (악성채권 진행상태)
+        $badDebtProgress = [
+            ['code' => 'NEGOTIATING', 'name' => '협의중', 'sort_order' => 1],
+            ['code' => 'LITIGATION', 'name' => '소송중', 'sort_order' => 2],
+            ['code' => 'RECOVERED', 'name' => '회수완료', 'sort_order' => 3],
+            ['code' => 'WRITTEN_OFF', 'name' => '대손처리', 'sort_order' => 4],
+        ];
+
+        foreach ($badDebtProgress as $item) {
+            DB::table('common_codes')->updateOrInsert(
+                ['code_group' => 'bad_debt_progress', 'code' => $item['code']],
+                [
+                    'code_group' => 'bad_debt_progress',
+                    'code' => $item['code'],
+                    'name' => $item['name'],
+                    'sort_order' => $item['sort_order'],
+                    'is_active' => true,
+                    'created_at' => $now,
+                    'updated_at' => $now,
+                ]
+            );
+        }
+
+        // product_category 코드 그룹 (견적 제품 카테고리)
+        $productCategories = [
+            ['code' => 'SCREEN', 'name' => '스크린', 'sort_order' => 1],
+            ['code' => 'STEEL', 'name' => '스틸', 'sort_order' => 2],
+        ];
+
+        foreach ($productCategories as $item) {
+            DB::table('common_codes')->updateOrInsert(
+                ['code_group' => 'product_category', 'code' => $item['code']],
+                [
+                    'code_group' => 'product_category',
+                    'code' => $item['code'],
+                    'name' => $item['name'],
+                    'sort_order' => $item['sort_order'],
+                    'is_active' => true,
+                    'created_at' => $now,
+                    'updated_at' => $now,
+                ]
+            );
+        }
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        DB::table('common_codes')->where('code_group', 'client_type')->delete();
+        DB::table('common_codes')->where('code_group', 'bad_debt_progress')->delete();
+        DB::table('common_codes')->where('code_group', 'product_category')->delete();
+    }
+};