diff --git a/src/core/runtime/src/add-tags-to-shared-resources-step.ts b/src/core/runtime/src/add-tags-to-shared-resources-step.ts
index 5473b8889..51164db50 100644
--- a/src/core/runtime/src/add-tags-to-shared-resources-step.ts
+++ b/src/core/runtime/src/add-tags-to-shared-resources-step.ts
@@ -21,6 +21,7 @@ interface AddTagToResourceOutput {
   resourceType: string;
   targetAccountIds: string[];
   tags: Tag[];
+  region: string;
 }
 
 type AddTagToResourceOutputs = AddTagToResourceOutput[];
@@ -48,7 +49,7 @@ export const handler = async (input: CreateTagsRequestInput) => {
         const credentials = await sts.getCredentialsForAccountAndRole(targetAccountId, assumeRoleName);
         if (ALLOWED_RESOURCE_TYPES.includes(resourceType)) {
           try {
-            const tagResources = new TagResources(credentials);
+            const tagResources = new TagResources(credentials, addTagsToResources.region);
             await tagResources.createTags({
               Resources: [resourceId],
               Tags: tags.map(t => ({ Key: t.key, Value: t.value })),
diff --git a/src/deployments/cdk/src/apps/phase-2.ts b/src/deployments/cdk/src/apps/phase-2.ts
index 0e8b67f52..3d0ac4ab8 100644
--- a/src/deployments/cdk/src/apps/phase-2.ts
+++ b/src/deployments/cdk/src/apps/phase-2.ts
@@ -200,6 +200,7 @@ export async function deploy({ acceleratorConfig, accountStacks, accounts, conte
             resourceType: 'security-group',
             targetAccountIds: [accountId],
             tags: securityGroup.tags.renderTags(),
+            region: securityGroupStack.region,
           })),
       });
     }
diff --git a/src/deployments/cdk/src/common/add-tags-to-resources-output.ts b/src/deployments/cdk/src/common/add-tags-to-resources-output.ts
index b0b79c4be..3db0c8616 100644
--- a/src/deployments/cdk/src/common/add-tags-to-resources-output.ts
+++ b/src/deployments/cdk/src/common/add-tags-to-resources-output.ts
@@ -11,6 +11,7 @@ export interface AddTagsToResource {
   resourceType: 'subnet' | 'security-group' | 'vpc' | 'tgw-attachment';
   targetAccountIds: string[];
   tags: Tag[];
+  region: string;
 }
 
 export interface AddTagsToResourcesOutputProps extends Omit<JsonOutputProps, 'value' | 'type'> {
diff --git a/src/deployments/cdk/src/common/vpc-subnet-sharing.ts b/src/deployments/cdk/src/common/vpc-subnet-sharing.ts
index 484c254c6..1126bf5c6 100644
--- a/src/deployments/cdk/src/common/vpc-subnet-sharing.ts
+++ b/src/deployments/cdk/src/common/vpc-subnet-sharing.ts
@@ -125,6 +125,7 @@ export class VpcSubnetSharing extends cdk.Construct {
             sourceAccountId: o.sourceAccountId,
             targetAccountIds: o.targetAccountIds,
             tags: o.subnet.tags.renderTags(),
+            region: cdk.Aws.REGION,
           })),
       });
 
@@ -137,6 +138,7 @@ export class VpcSubnetSharing extends cdk.Construct {
             sourceAccountId: o.sourceAccountId,
             targetAccountIds: o.targetAccountIds,
             tags: vpc.tags.renderTags(),
+            region: cdk.Aws.REGION,
           })),
       });
     }
diff --git a/src/deployments/cdk/src/common/vpc.ts b/src/deployments/cdk/src/common/vpc.ts
index c6943f171..174a19267 100644
--- a/src/deployments/cdk/src/common/vpc.ts
+++ b/src/deployments/cdk/src/common/vpc.ts
@@ -346,6 +346,7 @@ export class Vpc extends cdk.Construct implements constructs.Vpc {
                 resourceType: 'tgw-attachment',
                 tags: tgwAttachment!.resource.tags.renderTags(),
                 targetAccountIds: [ownerAccountId],
+                region: cdk.Aws.REGION,
               },
             ],
           });
diff --git a/src/deployments/cdk/src/deployments/firewall/cluster/step-2.ts b/src/deployments/cdk/src/deployments/firewall/cluster/step-2.ts
index 81b0481d2..c1a50be7d 100644
--- a/src/deployments/cdk/src/deployments/firewall/cluster/step-2.ts
+++ b/src/deployments/cdk/src/deployments/firewall/cluster/step-2.ts
@@ -174,6 +174,7 @@ async function createCustomerGateways(props: {
             value: `${prefix}_att`,
           },
         ],
+        region: cdk.Aws.REGION,
       });
 
       const associateConfig = attachConfig['tgw-rt-associate'] || [];
diff --git a/src/deployments/cdk/test/apps/unsupported-changes.mocks.ts b/src/deployments/cdk/test/apps/unsupported-changes.mocks.ts
index d05aabc7e..959a1640a 100644
--- a/src/deployments/cdk/test/apps/unsupported-changes.mocks.ts
+++ b/src/deployments/cdk/test/apps/unsupported-changes.mocks.ts
@@ -324,6 +324,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Web_Central_aza_net' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'subnet-075ca0d93563a4d6e',
@@ -334,6 +335,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Web_Central_azb_net' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'subnet-0b70e3e849949cc0c',
@@ -344,6 +346,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'App_Central_aza_net' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'subnet-04e252c39434bbb19',
@@ -354,6 +357,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'App_Central_azb_net' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'subnet-00bbd856fec06c15b',
@@ -364,6 +368,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Data_Central_aza_net' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'subnet-0ace127f373a1b274',
@@ -374,6 +379,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Data_Central_azb_net' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'subnet-05eff632d6af56d17',
@@ -384,6 +390,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Mgmt_Central_aza_net' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'subnet-03dc090bc09c84439',
@@ -394,6 +401,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Mgmt_Central_azb_net' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'subnet-02809ab1988c1ec82',
@@ -404,6 +412,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'GCWide_Central_aza_net' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'subnet-0f4514137baa07759',
@@ -414,6 +423,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'GCWide_Central_azb_net' },
             ],
+            region: 'ca-central-1',
           },
         ],
       }),
@@ -434,6 +444,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Central_vpc' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'vpc-0d0b4cd029857165a',
@@ -444,6 +455,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Central_vpc' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'vpc-0d0b4cd029857165a',
@@ -454,6 +466,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Central_vpc' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'vpc-0d0b4cd029857165a',
@@ -464,6 +477,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Central_vpc' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'vpc-0d0b4cd029857165a',
@@ -474,6 +488,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Central_vpc' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'vpc-0d0b4cd029857165a',
@@ -484,6 +499,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Central_vpc' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'vpc-0d0b4cd029857165a',
@@ -494,6 +510,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Central_vpc' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'vpc-0d0b4cd029857165a',
@@ -504,6 +521,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Central_vpc' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'vpc-0d0b4cd029857165a',
@@ -514,6 +532,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Central_vpc' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'vpc-0d0b4cd029857165a',
@@ -524,6 +543,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Central_vpc' },
             ],
+            region: 'ca-central-1',
           },
         ],
       }),
@@ -851,6 +871,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Mgmt_sg' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'sg-0c91bf1bc94e5797f',
@@ -860,6 +881,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Web_sg' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'sg-08f5b682020bf1c61',
@@ -869,6 +891,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'App_sg' },
             ],
+            region: 'ca-central-1',
           },
           {
             resourceId: 'sg-041abd65f62750b6e',
@@ -878,6 +901,7 @@ export function createPhaseInput(): Omit<PhaseInput, 'accountStacks'> {
               { key: 'Accelerator', value: 'PBMM' },
               { key: 'Name', value: 'Data_sg' },
             ],
+            region: 'ca-central-1',
           },
         ],
       }),
diff --git a/src/lib/common/src/aws/resource-tagging.ts b/src/lib/common/src/aws/resource-tagging.ts
index 4c8fd7318..be12594af 100644
--- a/src/lib/common/src/aws/resource-tagging.ts
+++ b/src/lib/common/src/aws/resource-tagging.ts
@@ -5,9 +5,10 @@ import { throttlingBackOff } from './backoff';
 export class TagResources {
   private readonly client: aws.EC2;
 
-  public constructor(credentials?: aws.Credentials) {
+  public constructor(credentials?: aws.Credentials, region?: string) {
     this.client = new aws.EC2({
       credentials,
+      region,
     });
   }