diff --git a/backend/src/util/decimal.ts b/backend/src/util/decimal.ts
new file mode 100644
index 000000000..3f32a850e
--- /dev/null
+++ b/backend/src/util/decimal.ts
@@ -0,0 +1,8 @@
+import Decimal from 'decimal.js-light'
+
+Decimal.set({
+  precision: 25,
+  rounding: Decimal.ROUND_HALF_UP,
+})
+
+export default Decimal