diff --git a/packages/desktop-client/src/components/common/Menu.tsx b/packages/desktop-client/src/components/common/Menu.tsx
index 84ced272fbf..6012cf8e33f 100644
--- a/packages/desktop-client/src/components/common/Menu.tsx
+++ b/packages/desktop-client/src/components/common/Menu.tsx
@@ -23,7 +23,7 @@ function Keybinding({ keyName }: KeybindingProps) {
   );
 }
 
-type MenuItem = {
+export type MenuItem = {
   type?: string | symbol;
   name: string;
   disabled?: boolean;
@@ -37,7 +37,7 @@ type MenuProps = {
   header?: ReactNode;
   footer?: ReactNode;
   items: Array<MenuItem | typeof Menu.line>;
-  onMenuSelect;
+  onMenuSelect: (itemName: MenuItem['name']) => void;
 };
 
 export default function Menu({
diff --git a/packages/desktop-client/src/components/schedules/SchedulesTable.tsx b/packages/desktop-client/src/components/schedules/SchedulesTable.tsx
index 79f9f673cee..4cce1a00bc7 100644
--- a/packages/desktop-client/src/components/schedules/SchedulesTable.tsx
+++ b/packages/desktop-client/src/components/schedules/SchedulesTable.tsx
@@ -7,7 +7,7 @@ import {
   type ScheduleStatusType,
   type ScheduleStatuses,
 } from 'loot-core/src/client/data-hooks/schedules';
-import * as monthUtils from 'loot-core/src/shared/months';
+import { format as monthUtilFormat } from 'loot-core/src/shared/months';
 import { getScheduledAmount } from 'loot-core/src/shared/schedules';
 import { integerToCurrency } from 'loot-core/src/shared/util';
 import { type ScheduleEntity } from 'loot-core/src/types/models';
@@ -16,7 +16,7 @@ import DotsHorizontalTriple from '../../icons/v1/DotsHorizontalTriple';
 import Check from '../../icons/v2/Check';
 import { colors } from '../../style';
 import Button from '../common/Button';
-import Menu from '../common/Menu';
+import Menu, { type MenuItem } from '../common/Menu';
 import Text from '../common/Text';
 import View from '../common/View';
 import PrivacyFilter from '../PrivacyFilter';
@@ -41,7 +41,7 @@ type SchedulesTableProps = {
 type CompletedScheduleItem = { id: 'show-completed' };
 type SchedulesTableItem = ScheduleEntity | CompletedScheduleItem;
 
-export let ROW_HEIGHT = 43;
+export const ROW_HEIGHT = 43;
 
 function OverflowMenu({
   schedule,
@@ -52,7 +52,7 @@ function OverflowMenu({
   status: ScheduleStatusType;
   onAction: SchedulesTableProps['onAction'];
 }) {
-  let [open, setOpen] = useState(false);
+  const [open, setOpen] = useState(false);
 
   return (
     <View>
@@ -77,7 +77,7 @@ function OverflowMenu({
           onClose={() => setOpen(false)}
         >
           <Menu
-            onMenuSelect={name => {
+            onMenuSelect={(name: MenuItem['name']) => {
               onAction(name, schedule.id);
               setOpen(false);
             }}
@@ -194,7 +194,7 @@ export function SchedulesTable({
         (amount > 0 ? '+' : '') +
         integerToCurrency(Math.abs(amount || 0));
       const dateStr = schedule.next_date
-        ? monthUtils.format(schedule.next_date, dateFormat)
+        ? monthUtilFormat(schedule.next_date, dateFormat)
         : null;
 
       return (
@@ -252,9 +252,7 @@ export function SchedulesTable({
           <DisplayId type="accounts" id={item._account} />
         </Field>
         <Field width={110} name="date">
-          {item.next_date
-            ? monthUtils.format(item.next_date, dateFormat)
-            : null}
+          {item.next_date ? monthUtilFormat(item.next_date, dateFormat) : null}
         </Field>
         <Field width={120} name="status" style={{ alignItems: 'flex-start' }}>
           <StatusBadge status={statuses.get(item.id)} />
diff --git a/packages/loot-core/src/client/data-hooks/accounts.tsx b/packages/loot-core/src/client/data-hooks/accounts.tsx
index fd3d4fd002b..9ed2b18497a 100644
--- a/packages/loot-core/src/client/data-hooks/accounts.tsx
+++ b/packages/loot-core/src/client/data-hooks/accounts.tsx
@@ -12,7 +12,7 @@ function useAccounts() {
 let AccountsContext = createContext(null);
 
 export function AccountsProvider({ children }) {
-  let data = useAccounts();
+  const data: AccountEntity[] = useAccounts();
   return <AccountsContext.Provider value={data} children={children} />;
 }
 
@@ -25,9 +25,9 @@ export function useCachedAccounts(): AccountEntity[];
 export function useCachedAccounts({
   idKey,
 }: {
-  idKey: string;
+  idKey: boolean;
 }): Record<AccountEntity['id'], AccountEntity>;
-export function useCachedAccounts({ idKey }: { idKey?: string } = {}) {
+export function useCachedAccounts({ idKey }: { idKey?: boolean } = {}) {
   const data: AccountEntity[] = useContext(AccountsContext);
   return idKey && data ? getAccountsById(data) : data;
 }
diff --git a/packages/loot-core/src/client/data-hooks/payees.tsx b/packages/loot-core/src/client/data-hooks/payees.tsx
index 2adba3bb71f..bdf73189634 100644
--- a/packages/loot-core/src/client/data-hooks/payees.tsx
+++ b/packages/loot-core/src/client/data-hooks/payees.tsx
@@ -1,5 +1,6 @@
 import React, { createContext, useContext } from 'react';
 
+import { type PayeeEntity } from '../../types/models';
 import q from '../query-helpers';
 import { useLiveQuery } from '../query-hooks';
 import { getPayeesById } from '../reducers/queries';
@@ -11,7 +12,7 @@ function usePayees() {
 let PayeesContext = createContext(null);
 
 export function PayeesProvider({ children }) {
-  let data = usePayees();
+  const data: PayeeEntity[] = usePayees();
   return <PayeesContext.Provider value={data} children={children} />;
 }
 
@@ -20,7 +21,13 @@ export function CachedPayees({ children, idKey }) {
   return children(data);
 }
 
-export function useCachedPayees({ idKey }: { idKey? } = {}) {
-  let data = useContext(PayeesContext);
+export function useCachedPayees(): PayeeEntity[];
+export function useCachedPayees({
+  idKey,
+}: {
+  idKey: boolean;
+}): Record<PayeeEntity['id'], PayeeEntity>;
+export function useCachedPayees({ idKey }: { idKey?: boolean } = {}) {
+  const data: PayeeEntity[] = useContext(PayeesContext);
   return idKey && data ? getPayeesById(data) : data;
 }
diff --git a/packages/loot-core/src/types/models/schedule.d.ts b/packages/loot-core/src/types/models/schedule.d.ts
index 03dd826213a..57bad1bd52c 100644
--- a/packages/loot-core/src/types/models/schedule.d.ts
+++ b/packages/loot-core/src/types/models/schedule.d.ts
@@ -13,7 +13,7 @@ export interface ScheduleEntity {
 
   // These are special fields that are actually pulled from the
   // underlying rule
-  _payee: PayeeEntity;
+  _payee: PayeeEntity['id'];
   _account: AccountEntity['id'];
   _amount: unknown;
   _amountOp: string;
diff --git a/tsconfig.json b/tsconfig.json
index 8936baed895..0b575736fe9 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -16,6 +16,7 @@
     // TODO: enable once every file is ts
     // "strict": true,
     "noFallthroughCasesInSwitch": true,
+    "noImplicitAny": true,
     "skipLibCheck": true,
     "jsx": "preserve",
     // Check JS files too