diff --git a/lib/deploy-substrate/deploy-substrate.template.yaml b/lib/deploy-substrate/deploy-substrate.template.yaml
index a65aa92..0b31b59 100644
--- a/lib/deploy-substrate/deploy-substrate.template.yaml
+++ b/lib/deploy-substrate/deploy-substrate.template.yaml
@@ -877,6 +877,17 @@ Resources:
               - arn:aws:secretsmanager:us-east-1:011934824531:secret:paychex-integrations/slack-bot-token-L8DntD
               - arn:aws:secretsmanager:us-east-1:011934824531:secret:paychex-integrations/front-inboxes-write-v6niDC
               - arn:aws:secretsmanager:us-east-1:011934824531:secret:paychex-integrations/3cx-system-admin-PcUeJD
+          - Sid: PaychexIntegrationsDynamoDB
+            Effect: Allow
+            Action:
+              - dynamodb:GetItem
+              - dynamodb:PutItem
+              - dynamodb:UpdateItem
+              - dynamodb:DeleteItem
+              - dynamodb:ConditionCheckItem
+              - dynamodb:DescribeTable
+            Resource:
+              - !Sub "arn:aws:dynamodb:us-east-1:${AWS::AccountId}:table/paychex-worker-ledger"
 
   ProcurementIngestBoundary:
     Type: AWS::IAM::ManagedPolicy
diff --git a/lib/terraform-substrate/terraform-substrate.template.yaml b/lib/terraform-substrate/terraform-substrate.template.yaml
index 449cd94..a478aa7 100644
--- a/lib/terraform-substrate/terraform-substrate.template.yaml
+++ b/lib/terraform-substrate/terraform-substrate.template.yaml
@@ -743,12 +743,10 @@ Resources:
                   - !Sub "arn:aws:sns:us-east-1:${AWS::AccountId}:site-alerts"
 
   # ---------------------------------------------------------------------------
-  # paychex-integrations (PLAT-120) — plan + apply roles for workspace
-  # paychex-integrations-prod. Copy shape from front-integrations; scaffold
-  # first apply is Lambda + artifact bucket + alarms + secret shells only
-  # (no EventBridge, no DynamoDB). Secret Get/Put value stays off the apply
-  # role. Lambda execution boundary is floor-only until first apply mints
-  # secret suffixes.
+  # paychex-integrations (PLAT-120/123) — plan + apply roles for workspace
+  # paychex-integrations-prod. Copy shape from front-integrations. Secret
+  # Get/Put value stays off the apply role. Lambda execution boundary pins
+  # minted secret ARNs and table paychex-worker-ledger.
   # ---------------------------------------------------------------------------
   HcptfPaychexIntegrationsPlanRole:
     Type: AWS::IAM::Role
@@ -830,6 +828,15 @@ Resources:
                   - secretsmanager:ListSecretVersionIds
                 Resource:
                   - !Sub "arn:aws:secretsmanager:us-east-1:${AWS::AccountId}:secret:paychex-integrations/*"
+              - Sid: RefreshDynamoDB
+                Effect: Allow
+                Action:
+                  - dynamodb:DescribeTable
+                  - dynamodb:DescribeTimeToLive
+                  - dynamodb:DescribeContinuousBackups
+                  - dynamodb:ListTagsOfResource
+                Resource:
+                  - !Sub "arn:aws:dynamodb:us-east-1:${AWS::AccountId}:table/paychex-worker-ledger"
 
   HcptfPaychexIntegrationsApplyRole:
     Type: AWS::IAM::Role
@@ -930,6 +937,18 @@ Resources:
                       - paychex-integrations/slack-bot-token
                       - paychex-integrations/front-inboxes-write
                       - paychex-integrations/3cx-system-admin
+              - Sid: DynamoDBTable
+                Effect: Allow
+                Action:
+                  - dynamodb:*
+                Resource:
+                  - !Sub "arn:aws:dynamodb:us-east-1:${AWS::AccountId}:table/paychex-worker-ledger"
+                  - !Sub "arn:aws:dynamodb:us-east-1:${AWS::AccountId}:table/paychex-worker-ledger/index/*"
+              - Sid: DynamoDBList
+                Effect: Allow
+                Action:
+                  - dynamodb:ListTables
+                Resource: "*"
 
   # ---------------------------------------------------------------------------
   # Per-workspace hcptf-* roles for sh-openswe-traces-prod (PLAT-73).