diff --git a/apps/api/src/controllers/Actions.ts b/apps/api/src/controllers/Actions.ts
index a124eef..b6dd680 100644
--- a/apps/api/src/controllers/Actions.ts
+++ b/apps/api/src/controllers/Actions.ts
@@ -275,6 +275,7 @@ export class Actions {
       // These are always available for template rendering
       const dataWithSystemVars = {
         ...mergedData,
+        id: contact.id,
         email: contact.email,
         data: mergedData, // Also available as nested data for {{data.fieldName}} syntax
         unsubscribeUrl: `${DASHBOARD_URI}/unsubscribe/${contact.id}`,
diff --git a/apps/api/src/services/CampaignService.ts b/apps/api/src/services/CampaignService.ts
index 75a1e03..8c4de37 100644
--- a/apps/api/src/services/CampaignService.ts
+++ b/apps/api/src/services/CampaignService.ts
@@ -451,6 +451,7 @@ export class CampaignService {
         const contactData =
           contact.data && typeof contact.data === 'object' && !Array.isArray(contact.data) ? contact.data : {};
         const variables = {
+          id: contact.id,
           email: contact.email,
           ...contactData,
           data: contactData,
diff --git a/apps/api/src/services/ContactService.ts b/apps/api/src/services/ContactService.ts
index 7535326..e7f0b1d 100644
--- a/apps/api/src/services/ContactService.ts
+++ b/apps/api/src/services/ContactService.ts
@@ -221,7 +221,15 @@ export class ContactService {
       for (const [key, value] of Object.entries(data)) {
         // Skip reserved system-generated fields
         // These fields are dynamically added during template rendering and cannot be overridden
-        const reservedFields = ['plunk_id', 'plunk_email', 'email', 'unsubscribeUrl', 'subscribeUrl', 'manageUrl'];
+        const reservedFields = [
+          'plunk_id',
+          'plunk_email',
+          'id',
+          'email',
+          'unsubscribeUrl',
+          'subscribeUrl',
+          'manageUrl',
+        ];
         if (reservedFields.includes(key)) {
           continue;
         }
diff --git a/apps/api/src/services/EmailService.ts b/apps/api/src/services/EmailService.ts
index 486d854..3ecc28b 100644
--- a/apps/api/src/services/EmailService.ts
+++ b/apps/api/src/services/EmailService.ts
@@ -333,6 +333,7 @@ export class EmailService {
         subject: email.subject,
         body: email.body,
         data: {
+          id: email.contact.id,
           email: email.contact.email,
           ...contactData,
           data: contactData,
diff --git a/apps/api/src/services/WorkflowExecutionService.ts b/apps/api/src/services/WorkflowExecutionService.ts
index 0d85483..1b90b6c 100644
--- a/apps/api/src/services/WorkflowExecutionService.ts
+++ b/apps/api/src/services/WorkflowExecutionService.ts
@@ -545,6 +545,7 @@ export class WorkflowExecutionService {
         : {};
 
     const variables = {
+      id: contact.id,
       email: contact.email,
       ...contactData,
       ...executionContext,
diff --git a/apps/web/src/components/EmailEditor/EmailEditor.tsx b/apps/web/src/components/EmailEditor/EmailEditor.tsx
index afc76ec..4447200 100644
--- a/apps/web/src/components/EmailEditor/EmailEditor.tsx
+++ b/apps/web/src/components/EmailEditor/EmailEditor.tsx
@@ -44,6 +44,7 @@ interface EmailEditorProps {
 }
 
 const commonVariables = [
+  {name: 'id', description: 'Contact ID'},
   {name: 'email', description: 'Recipient email address'},
   {name: 'unsubscribeUrl', description: 'Unsubscribe link'},
   {name: 'subscribeUrl', description: 'Subscribe link'},
diff --git a/apps/web/src/components/EmailEditor/VariableMention.ts b/apps/web/src/components/EmailEditor/VariableMention.ts
index d64e523..b409bd9 100644
--- a/apps/web/src/components/EmailEditor/VariableMention.ts
+++ b/apps/web/src/components/EmailEditor/VariableMention.ts
@@ -117,7 +117,7 @@ export const VariableMention = Mention.configure({
 
     items: ({query}) => {
       const safeVariables = Array.isArray(availableVariables) ? availableVariables : [];
-      const allVariables = ['email', 'unsubscribeUrl', 'subscribeUrl', 'manageUrl', 'locale', ...safeVariables];
+      const allVariables = ['id', 'email', 'unsubscribeUrl', 'subscribeUrl', 'manageUrl', 'locale', ...safeVariables];
       const uniqueVariables = Array.from(new Set(allVariables)).filter(v => typeof v === 'string');
 
       if (!query) {