diff --git a/packages/desktop-client/src/components/mobile/budget/CategoryTransactions.jsx b/packages/desktop-client/src/components/mobile/budget/CategoryTransactions.tsx
similarity index 88%
rename from packages/desktop-client/src/components/mobile/budget/CategoryTransactions.jsx
rename to packages/desktop-client/src/components/mobile/budget/CategoryTransactions.tsx
index c03f1676451..543f72c138b 100644
--- a/packages/desktop-client/src/components/mobile/budget/CategoryTransactions.jsx
+++ b/packages/desktop-client/src/components/mobile/budget/CategoryTransactions.tsx
@@ -11,6 +11,10 @@ import { listen } from 'loot-core/platform/client/fetch';
 import * as monthUtils from 'loot-core/shared/months';
 import { q } from 'loot-core/shared/query';
 import { isPreviewId } from 'loot-core/shared/transactions';
+import {
+  type TransactionEntity,
+  type CategoryEntity,
+} from 'loot-core/src/types/models';
 
 import { useDateFormat } from '../../../hooks/useDateFormat';
 import { useNavigate } from '../../../hooks/useNavigate';
@@ -21,7 +25,15 @@ import { MobileBackButton } from '../MobileBackButton';
 import { AddTransactionButton } from '../transactions/AddTransactionButton';
 import { TransactionListWithBalances } from '../transactions/TransactionListWithBalances';
 
-export function CategoryTransactions({ category, month }) {
+type CategoryTransactionsProps = {
+  category: CategoryEntity;
+  month: string;
+};
+
+export function CategoryTransactions({
+  category,
+  month,
+}: CategoryTransactionsProps) {
   const dispatch = useDispatch();
   const navigate = useNavigate();
 
@@ -29,7 +41,7 @@ export function CategoryTransactions({ category, month }) {
     () =>
       q('transactions')
         .options({ splits: 'inline' })
-        .filter(getCategoryMonthFilter(category, month))
+        .filter(getCategoryMonthFilter({ category, month }))
         .select('*'),
     [category, month],
   );
@@ -73,7 +85,7 @@ export function CategoryTransactions({ category, month }) {
   });
 
   const onOpenTransaction = useCallback(
-    transaction => {
+    (transaction: TransactionEntity) => {
       // details of how the native app used to handle preview transactions here can be found at commit 05e58279
       if (!isPreviewId(transaction.id)) {
         navigate(`/transactions/${transaction.id}`);
@@ -119,7 +131,13 @@ export function CategoryTransactions({ category, month }) {
   );
 }
 
-function getCategoryMonthFilter(category, month) {
+function getCategoryMonthFilter({
+  category,
+  month,
+}: {
+  category: CategoryEntity;
+  month: string;
+}) {
   return {
     category: category.id,
     date: { $transform: '$month', $eq: month },
diff --git a/packages/desktop-client/src/components/mobile/transactions/TransactionListWithBalances.jsx b/packages/desktop-client/src/components/mobile/transactions/TransactionListWithBalances.jsx
index f884f927ac1..37a98f1a6d3 100644
--- a/packages/desktop-client/src/components/mobile/transactions/TransactionListWithBalances.jsx
+++ b/packages/desktop-client/src/components/mobile/transactions/TransactionListWithBalances.jsx
@@ -67,7 +67,7 @@ export function TransactionListWithBalances({
   onSearch,
   onLoadMore,
   onOpenTransaction,
-  onRefresh,
+  onRefresh = () => {},
 }) {
   const selectedInst = useSelected('transactions', transactions);
 
diff --git a/upcoming-release-notes/3875.md b/upcoming-release-notes/3875.md
new file mode 100644
index 00000000000..7f139bf825b
--- /dev/null
+++ b/upcoming-release-notes/3875.md
@@ -0,0 +1,6 @@
+---
+category: Maintenance
+authors: [cindywu]
+---
+
+Convert CategoryTransactions.jsx to tsx
\ No newline at end of file