diff --git a/lib/rucio/core/account.py b/lib/rucio/core/account.py
index b65d702e1b..2c05ff6dc8 100644
--- a/lib/rucio/core/account.py
+++ b/lib/rucio/core/account.py
@@ -17,7 +17,9 @@
 from enum import Enum
 from re import match
 from traceback import format_exc
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Any
+from collections.abc import Generator
+import uuid
 
 from sqlalchemy import select, and_
 from sqlalchemy.exc import IntegrityError
@@ -27,6 +29,7 @@
 import rucio.core.rse
 from rucio.common import exception
 from rucio.common.config import config_get_bool
+from rucio.common.types import InternalAccount
 from rucio.core.vo import vo_exists
 from rucio.db.sqla import models
 from rucio.db.sqla.constants import AccountStatus, AccountType
@@ -37,7 +40,7 @@
 
 
 @transactional_session
-def add_account(account, type_, email, *, session: "Session"):
+def add_account(account: InternalAccount, type_: AccountType, email: str, *, session: "Session"):
     """ Add an account with the given account name and type.
 
     :param account: the name of the new account.
@@ -63,7 +66,7 @@ def add_account(account, type_, email, *, session: "Session"):
 
 
 @read_session
-def account_exists(account, *, session: "Session"):
+def account_exists(account: InternalAccount, *, session: "Session") -> bool:
     """ Checks to see if account exists and is active.
 
     :param account: Name of the account.
@@ -81,7 +84,7 @@ def account_exists(account, *, session: "Session"):
 
 
 @read_session
-def get_account(account, *, session: "Session"):
+def get_account(account: InternalAccount, *, session: "Session") -> dict:
     """ Returns an account for the given account name.
 
     :param account: the name of the account.
@@ -102,7 +105,7 @@ def get_account(account, *, session: "Session"):
 
 
 @transactional_session
-def del_account(account, *, session: "Session"):
+def del_account(account: InternalAccount, *, session: "Session"):
     """ Disable an account with the given account name.
 
     :param account: the account name.
@@ -123,7 +126,7 @@ def del_account(account, *, session: "Session"):
 
 
 @transactional_session
-def update_account(account, key, value, *, session: "Session"):
+def update_account(account: InternalAccount, key: str, value: Any, *, session: "Session"):
     """ Update a property of an account.
 
     :param account: Name of the account.
@@ -152,7 +155,7 @@ def update_account(account, key, value, *, session: "Session"):
 
 
 @stream_session
-def list_accounts(filter_=None, *, session: "Session"):
+def list_accounts(filter_: dict = None, *, session: "Session") -> Generator[dict]:
     """ Returns a list of all account names.
 
     :param filter_: Dictionary of attributes by which the input data should be filtered
@@ -213,7 +216,7 @@ def list_accounts(filter_=None, *, session: "Session"):
 
 
 @read_session
-def list_identities(account, *, session: "Session"):
+def list_identities(account: InternalAccount, *, session: "Session"):
     """
     List all identities on an account.
 
@@ -248,7 +251,7 @@ def list_identities(account, *, session: "Session"):
 
 
 @read_session
-def list_account_attributes(account, *, session: "Session"):
+def list_account_attributes(account: InternalAccount, *, session: "Session") -> list[dict]:
     """
     Get all attributes defined for an account.
 
@@ -278,7 +281,7 @@ def list_account_attributes(account, *, session: "Session"):
 
 
 @read_session
-def has_account_attribute(account, key, *, session: "Session"):
+def has_account_attribute(account: InternalAccount, key: str, *, session: "Session") -> bool:
     """
     Indicates whether the named key is present for the account.
 
@@ -298,7 +301,7 @@ def has_account_attribute(account, key, *, session: "Session"):
 
 
 @transactional_session
-def add_account_attribute(account, key, value, *, session: "Session"):
+def add_account_attribute(account: InternalAccount, key: str, value: Any, *, session: "Session"):
     """
     Add an attribute for the given account name.
 
@@ -334,7 +337,7 @@ def add_account_attribute(account, key, value, *, session: "Session"):
 
 
 @transactional_session
-def del_account_attribute(account, key, *, session: "Session"):
+def del_account_attribute(account: InternalAccount, key: str, *, session: "Session"):
     """
     Add an attribute for the given account name.
 
@@ -355,7 +358,7 @@ def del_account_attribute(account, key, *, session: "Session"):
 
 
 @read_session
-def get_usage(rse_id, account, *, session: "Session"):
+def get_usage(rse_id: uuid.UUID, account: InternalAccount, *, session: "Session") -> dict:
     """
     Returns current values of the specified counter, or raises CounterNotFound if the counter does not exist.
 
@@ -379,7 +382,7 @@ def get_usage(rse_id, account, *, session: "Session"):
 
 
 @read_session
-def get_all_rse_usages_per_account(account, *, session: "Session"):
+def get_all_rse_usages_per_account(account: InternalAccount, *, session: "Session") -> list[dict]:
     """
     Returns current values of the specified counter, or raises CounterNotFound if the counter does not exist.
 
@@ -400,7 +403,7 @@ def get_all_rse_usages_per_account(account, *, session: "Session"):
 
 
 @read_session
-def get_usage_history(rse_id, account, *, session: "Session"):
+def get_usage_history(rse_id: uuid.UUID, account: InternalAccount, *, session: "Session") -> dict:
     """
     Returns historical values of the specified counter, or raises CounterNotFound if the counter does not exist.
 
@@ -423,4 +426,3 @@ def get_usage_history(rse_id, account, *, session: "Session"):
         return [row._asdict() for row in session.execute(query)]
     except exc.NoResultFound:
         raise exception.CounterNotFound('No usage can be found for account %s on RSE %s' % (account, rucio.core.rse.get_rse_name(rse_id=rse_id, session=session)))
-    return []
diff --git a/lib/rucio/core/account_counter.py b/lib/rucio/core/account_counter.py
index c0626bd9f8..f42a276d12 100644
--- a/lib/rucio/core/account_counter.py
+++ b/lib/rucio/core/account_counter.py
@@ -12,23 +12,26 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+import uuid
 import datetime
 from typing import TYPE_CHECKING
 
 from sqlalchemy import literal, insert, select
 from sqlalchemy.orm.exc import NoResultFound
 
+from rucio.common.types import InternalAccount
 from rucio.db.sqla import models, filter_thread_work
 from rucio.db.sqla.session import read_session, transactional_session
 
 if TYPE_CHECKING:
-    from sqlalchemy.orm import Session
+    from sqlalchemy.orm import Session, Query
 
 MAX_COUNTERS = 10
 
 
 @transactional_session
-def add_counter(rse_id, account, *, session: "Session"):
+def add_counter(rse_id: uuid.UUID, account: InternalAccount, *, session: "Session"):
     """
     Creates the specified counter for a rse_id and account.
 
@@ -41,7 +44,7 @@ def add_counter(rse_id, account, *, session: "Session"):
 
 
 @transactional_session
-def increase(rse_id, account, files, bytes_, *, session: "Session"):
+def increase(rse_id: uuid.UUID, account: InternalAccount, files: int, bytes_: int, *, session: "Session"):
     """
     Increments the specified counter by the specified amount.
 
@@ -55,7 +58,7 @@ def increase(rse_id, account, files, bytes_, *, session: "Session"):
 
 
 @transactional_session
-def decrease(rse_id, account, files, bytes_, *, session: "Session"):
+def decrease(rse_id: uuid.UUID, account: InternalAccount, files: int, bytes_: int, *, session: "Session") -> None:
     """
     Decreases the specified counter by the specified amount.
 
@@ -69,7 +72,7 @@ def decrease(rse_id, account, files, bytes_, *, session: "Session"):
 
 
 @transactional_session
-def del_counter(rse_id, account, *, session: "Session"):
+def del_counter(rse_id: uuid.UUID, account: InternalAccount, *, session: "Session"):
     """
     Resets the specified counter and initializes it by the specified amounts.
 
@@ -82,7 +85,7 @@ def del_counter(rse_id, account, *, session: "Session"):
 
 
 @read_session
-def get_updated_account_counters(total_workers, worker_number, *, session: "Session"):
+def get_updated_account_counters(total_workers: int, worker_number: int, *, session: "Session") -> list["Query"]:
     """
     Get updated rse_counters.
 
@@ -105,7 +108,7 @@ def get_updated_account_counters(total_workers, worker_number, *, session: "Sess
 
 
 @transactional_session
-def update_account_counter(account, rse_id, *, session: "Session"):
+def update_account_counter(account: InternalAccount, rse_id: uuid.UUID, *, session: "Session"):
     """
     Read the updated_account_counters and update the account_counter.
 
@@ -131,7 +134,7 @@ def update_account_counter(account, rse_id, *, session: "Session"):
 
 
 @transactional_session
-def update_account_counter_history(account, rse_id, *, session: "Session"):
+def update_account_counter_history(account: InternalAccount, rse_id: uuid.UUID, *, session: "Session"):
     """
     Read the AccountUsage and update the AccountUsageHistory.
 
diff --git a/lib/rucio/core/account_limit.py b/lib/rucio/core/account_limit.py
index fd7b84722d..b1e4be592f 100644
--- a/lib/rucio/core/account_limit.py
+++ b/lib/rucio/core/account_limit.py
@@ -13,12 +13,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from typing import TYPE_CHECKING
+import uuid
+from typing import TYPE_CHECKING, Optional
 
 from sqlalchemy.orm.exc import NoResultFound
 from sqlalchemy.sql import func, select, literal
 from sqlalchemy.sql.expression import and_, or_
 
+from rucio.common.types import InternalAccount
 from rucio.core.account import get_all_rse_usages_per_account
 from rucio.core.rse import get_rse_name
 from rucio.core.rse_expression_parser import parse_expression
@@ -30,7 +32,7 @@
 
 
 @read_session
-def get_rse_account_usage(rse_id, *, session: "Session"):
+def get_rse_account_usage(rse_id: uuid.UUID, *, session: "Session") -> list[dict]:
     """
     Returns the account limit and usage for all accounts on a RSE.
 
@@ -90,7 +92,7 @@ def get_rse_account_usage(rse_id, *, session: "Session"):
 
 
 @read_session
-def get_global_account_limits(account=None, *, session: "Session"):
+def get_global_account_limits(account: InternalAccount = None, *, session: "Session") -> dict:
     """
     Returns the global account limits for the account.
 
@@ -121,7 +123,7 @@ def get_global_account_limits(account=None, *, session: "Session"):
 
 
 @read_session
-def get_global_account_limit(account, rse_expression, *, session: "Session"):
+def get_global_account_limit(account: InternalAccount, rse_expression: str, *, session: "Session") -> int:
     """
     Returns the global account limit for the account on the rse expression.
 
@@ -141,7 +143,7 @@ def get_global_account_limit(account, rse_expression, *, session: "Session"):
 
 
 @read_session
-def get_local_account_limit(account, rse_id, *, session: "Session"):
+def get_local_account_limit(account: InternalAccount, rse_id: uuid.UUID, *, session: "Session") -> Optional[int | float]:
     """
     Returns the account limit for the account on the rse.
 
@@ -162,7 +164,7 @@ def get_local_account_limit(account, rse_id, *, session: "Session"):
 
 
 @read_session
-def get_local_account_limits(account, rse_ids=None, *, session: "Session"):
+def get_local_account_limits(account: InternalAccount, rse_ids: list[uuid.UUID] = None, *, session: "Session") -> dict:
     """
     Returns the account limits for the account on the list of rses.
 
@@ -196,7 +198,7 @@ def get_local_account_limits(account, rse_ids=None, *, session: "Session"):
 
 
 @transactional_session
-def set_local_account_limit(account, rse_id, bytes_, *, session: "Session"):
+def set_local_account_limit(account: InternalAccount, rse_id: uuid.UUID, bytes_: int, *, session: "Session"):
     """
     Returns the limits for the account on the rse.
 
@@ -214,7 +216,7 @@ def set_local_account_limit(account, rse_id, bytes_, *, session: "Session"):
 
 
 @transactional_session
-def set_global_account_limit(account, rse_expression, bytes_, *, session: "Session"):
+def set_global_account_limit(account: InternalAccount, rse_expression: str, bytes_: int, *, session: "Session"):
     """
     Sets the global limit for the account on a RSE expression.
 
@@ -232,7 +234,7 @@ def set_global_account_limit(account, rse_expression, bytes_, *, session: "Sessi
 
 
 @transactional_session
-def delete_local_account_limit(account, rse_id, *, session: "Session"):
+def delete_local_account_limit(account: InternalAccount, rse_id: uuid.UUID, *, session: "Session") -> bool:
     """
     Deletes a local account limit.
 
@@ -250,7 +252,7 @@ def delete_local_account_limit(account, rse_id, *, session: "Session"):
 
 
 @transactional_session
-def delete_global_account_limit(account, rse_expression, *, session: "Session"):
+def delete_global_account_limit(account: InternalAccount, rse_expression: str, *, session: "Session") -> bool:
     """
     Deletes a global account limit.
 
@@ -268,7 +270,7 @@ def delete_global_account_limit(account, rse_expression, *, session: "Session"):
 
 
 @transactional_session
-def get_local_account_usage(account, rse_id=None, *, session: "Session"):
+def get_local_account_usage(account: InternalAccount, rse_id: uuid.UUID = None, *, session: "Session") -> list[dict]:
     """
     Read the account usage and connect it with (if available) the account limits of the account.
 
@@ -311,7 +313,7 @@ def get_local_account_usage(account, rse_id=None, *, session: "Session"):
 
 
 @transactional_session
-def get_global_account_usage(account, rse_expression=None, *, session: "Session"):
+def get_global_account_usage(account: InternalAccount, rse_expression: str = None, *, session: "Session") -> list[dict]:
     """
     Read the account usage and connect it with the global account limits of the account.