diff --git a/src/modules/billing/billing.controller.ts b/src/modules/billing/billing.controller.ts
index 4a0c6bc..df36d2d 100644
--- a/src/modules/billing/billing.controller.ts
+++ b/src/modules/billing/billing.controller.ts
@@ -22,6 +22,7 @@ export class BillingController {
       payload.projectId!,
       payload.planId,
       payload.countryCode,
+      payload.postalCode,
     );
     return {
       status: 'successful',
diff --git a/src/modules/billing/billing.service.ts b/src/modules/billing/billing.service.ts
index e2d69d4..9b5c773 100644
--- a/src/modules/billing/billing.service.ts
+++ b/src/modules/billing/billing.service.ts
@@ -26,7 +26,12 @@ export class BillingService {
     @Inject() private readonly configService: ConfigService,
   ) {}
 
-  async upgradePlan(projectId: number, planId: number, countryCode: string): Promise<string> {
+  async upgradePlan(
+    projectId: number,
+    planId: number,
+    countryCode: string,
+    postalCode: string,
+  ): Promise<string> {
     // get project
     const project = await this.projectRepository.getProjectById(projectId);
     if (project === null) {
@@ -99,6 +104,7 @@ export class BillingService {
         email: adminUser!.emailAddress,
         name: project.name,
         countryCode,
+        postalCode,
       },
       subscription: {
         priceId: plan.metadata.paddleData.priceId,
diff --git a/src/modules/billing/dto/generate-payment-link.dto.ts b/src/modules/billing/dto/generate-payment-link.dto.ts
index 8703da9..4e6f2f6 100644
--- a/src/modules/billing/dto/generate-payment-link.dto.ts
+++ b/src/modules/billing/dto/generate-payment-link.dto.ts
@@ -15,4 +15,9 @@ export class GeneratePaymentLinkDto {
     message: 'Country code not provided',
   })
   countryCode: string;
+
+  @IsNotEmpty({
+    message: 'Postal code not provided',
+  })
+  postalCode: string;
 }
diff --git a/src/modules/http/paddle-http-client/client.ts b/src/modules/http/paddle-http-client/client.ts
index f94c76c..4e7704b 100644
--- a/src/modules/http/paddle-http-client/client.ts
+++ b/src/modules/http/paddle-http-client/client.ts
@@ -50,7 +50,11 @@ export class PaddleHttpClient extends BaseHttpClient {
     const addresses = await this.listCustomerAddress(customer.id);
     address = addresses?.find((x) => x.country_code === request.customer.countryCode);
     if (address === null || address === undefined) {
-      address = await this.createCustomerAddress(customer.id, request.customer.countryCode);
+      address = await this.createCustomerAddress(
+        customer.id,
+        request.customer.countryCode,
+        request.customer.postalCode,
+      );
     }
     // create transaction
     const response = await this.request<Record<string, unknown>>({
@@ -243,12 +247,14 @@ export class PaddleHttpClient extends BaseHttpClient {
   private async createCustomerAddress(
     customerId: string,
     countryCode: string,
+    postalCode: string,
   ): Promise<AddressResponse> {
     const response = await this.request<Record<string, unknown>>({
       url: `customers/${customerId}/addresses`,
       method: 'POST',
       data: {
         country_code: countryCode,
+        postal_code: postalCode,
       },
     });
 
diff --git a/src/modules/http/paddle-http-client/types.ts b/src/modules/http/paddle-http-client/types.ts
index 8be265c..4fb95a3 100644
--- a/src/modules/http/paddle-http-client/types.ts
+++ b/src/modules/http/paddle-http-client/types.ts
@@ -34,6 +34,7 @@ export type CreateTransactionRequest = {
     email: string;
     name: string;
     countryCode: string;
+    postalCode: string;
   };
   subscription: {
     priceId: string;