diff --git a/src/libs/CardUtils.js b/src/libs/CardUtils.js
deleted file mode 100644
index 1e93ff4a110e..000000000000
--- a/src/libs/CardUtils.js
+++ /dev/null
@@ -1,33 +0,0 @@
-/**
- * Returns the masked card number (ex: 4242XXXXXXXX4242)
- *
- * @param {String} cardNumber
- * @return {Boolean}
- */
-function maskCardNumber(cardNumber) {
-    const firstFour = cardNumber.substring(0, 4);
-    const lastFour = cardNumber.substring(cardNumber.length - 4);
-
-    return `${firstFour}${'X'.repeat(cardNumber.length - 8)}${lastFour}`;
-}
-
-/**
- * @param {String} expirationDateString - string in MM/YYYY, MM/YY, MMYY, or MMYYYY format
- * @returns {String}
- */
-function getMonthFromExpirationDateString(expirationDateString) {
-    return expirationDateString.substr(0, 2);
-}
-
-/**
- * @param {String} expirationDateString - string in MMYY or MMYYYY format, with any non-number separator
- * @returns {String}
- */
-function getYearFromExpirationDateString(expirationDateString) {
-    const stringContainsNumbersOnly = /^\d+$/.test(expirationDateString);
-    const cardYear = stringContainsNumbersOnly ? expirationDateString.substr(2) : expirationDateString.substr(3);
-
-    return cardYear.length === 2 ? `20${cardYear}` : cardYear;
-}
-
-export {maskCardNumber, getMonthFromExpirationDateString, getYearFromExpirationDateString};
diff --git a/src/libs/CardUtils.ts b/src/libs/CardUtils.ts
new file mode 100644
index 000000000000..bbb938a666ac
--- /dev/null
+++ b/src/libs/CardUtils.ts
@@ -0,0 +1,18 @@
+/**
+ * @returns string with a month in MM format
+ */
+function getMonthFromExpirationDateString(expirationDateString: string) {
+    return expirationDateString.substring(0, 2);
+}
+
+/**
+ * @returns string with a year in YY or YYYY format
+ */
+function getYearFromExpirationDateString(expirationDateString: string) {
+    const stringContainsNumbersOnly = /^\d+$/.test(expirationDateString);
+    const cardYear = stringContainsNumbersOnly ? expirationDateString.substring(2) : expirationDateString.substring(3);
+
+    return cardYear.length === 2 ? `20${cardYear}` : cardYear;
+}
+
+export {getMonthFromExpirationDateString, getYearFromExpirationDateString};