diff --git a/src/backend/app/auth/auth_deps.py b/src/backend/app/auth/auth_deps.py
index 4bea8abde..8ee41db60 100644
--- a/src/backend/app/auth/auth_deps.py
+++ b/src/backend/app/auth/auth_deps.py
@@ -19,16 +19,19 @@
 """Auth dependencies, for restricted routes and cookie handling."""
 
 from time import time
-from typing import Optional
+from typing import Annotated, Optional
 
 import jwt
-from fastapi import Header, HTTPException, Request, Response
+from fastapi import Depends, Header, HTTPException, Request, Response
 from fastapi.responses import JSONResponse
 from loguru import logger as log
+from psycopg import Connection
 
 from app.auth.auth_schemas import AuthUser
 from app.config import settings
+from app.db.database import db_conn
 from app.db.enums import HTTPStatus, UserRole
+from app.db.models import DbUser
 
 ### Cookie / Token Handling
 
@@ -262,7 +265,9 @@ async def refresh_cookies(
 
 
 async def login_required(
-    request: Request, access_token: str = Header(None)
+    db: Annotated[Connection, Depends(db_conn)],
+    request: Request,
+    access_token: str = Header(None),
 ) -> AuthUser:
     """Dependency for endpoints requiring login."""
     if settings.DEBUG:
@@ -273,11 +278,13 @@ async def login_required(
         request,
         settings.cookie_name,  # FMTM cookie
     )
-    return await _authenticate_user(extracted_token)
+    return await _authenticate_user(db, extracted_token)
 
 
 async def mapper_login_required(
-    request: Request, access_token: str = Header(None)
+    db: Annotated[Connection, Depends(db_conn)],
+    request: Request,
+    access_token: str = Header(None),
 ) -> AuthUser:
     """Dependency for mapper frontend login."""
     if settings.DEBUG:
@@ -292,8 +299,7 @@ async def mapper_login_required(
 
     # Verify login and continue
     if extracted_token:
-        print("mapper")
-        return await _authenticate_user(extracted_token)
+        return await _authenticate_user(db, extracted_token)
 
     # Else user has no token, so we provide login data automatically
     username = "svcfmtm"
@@ -305,7 +311,7 @@ async def mapper_login_required(
     return AuthUser(**temp_user)
 
 
-async def _authenticate_user(access_token: Optional[str]) -> AuthUser:
+async def _authenticate_user(db: Connection, access_token: Optional[str]) -> AuthUser:
     """Authenticate user by verifying the access token."""
     if not access_token:
         raise HTTPException(
@@ -322,4 +328,5 @@ async def _authenticate_user(access_token: Optional[str]) -> AuthUser:
             detail="Access token not valid",
         ) from e
 
+    await DbUser.update_last_active(db=db, user_id=int(token_data["sub"].split("|")[1]))
     return AuthUser(**token_data)
diff --git a/src/backend/app/db/models.py b/src/backend/app/db/models.py
index 1d7ee7176..faae34470 100644
--- a/src/backend/app/db/models.py
+++ b/src/backend/app/db/models.py
@@ -22,7 +22,7 @@
 """
 
 import json
-from datetime import timedelta
+from datetime import datetime, timedelta, timezone
 from io import BytesIO
 from re import sub
 from typing import TYPE_CHECKING, Annotated, Optional, Self
@@ -160,6 +160,7 @@ class DbUser(BaseModel):
     tasks_invalidated: Optional[int] = None
     projects_mapped: Optional[list[int]] = None
     registered_at: Optional[AwareDatetime] = None
+    last_active_at: Optional[AwareDatetime] = None
 
     # Relationships
     project_roles: Optional[dict[int, ProjectRole]] = None  # project:role pairs
@@ -312,6 +313,20 @@ async def create(
 
         return new_user
 
+    @classmethod
+    async def update_last_active(cls, db: Connection, user_id: int) -> None:
+        """Update the last active timestamp."""
+        async with db.cursor(row_factory=class_row(cls)) as cur:
+            await cur.execute(
+                """
+                UPDATE users
+                SET last_active_at = %(now)s
+                WHERE id = %(user_id)s;
+                """,
+                {"now": datetime.now(timezone.utc), "user_id": user_id},
+            )
+        log.info(f"User ({user_id}) last active timestamp updated.")
+
 
 class DbOrganisation(BaseModel):
     """Table organisations."""