diff --git a/package-lock.json b/package-lock.json
index 4d8a875..a554296 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -47,6 +47,7 @@
         "react-dom": "^18",
         "react-hook-form": "^7.49.2",
         "react-i18next": "^13.5.0",
+        "react-idle-timer": "^5.7.2",
         "react-intl": "^6.5.5",
         "react-number-format": "^5.3.4",
         "react-select": "^5.8.0",
@@ -9043,6 +9044,15 @@
         }
       }
     },
+    "node_modules/react-idle-timer": {
+      "version": "5.7.2",
+      "resolved": "https://registry.npmjs.org/react-idle-timer/-/react-idle-timer-5.7.2.tgz",
+      "integrity": "sha512-+BaPfc7XEUU5JFkwZCx6fO1bLVK+RBlFH+iY4X34urvIzZiZINP6v2orePx3E6pAztJGE7t4DzvL7if2SL/0GQ==",
+      "peerDependencies": {
+        "react": ">=16",
+        "react-dom": ">=16"
+      }
+    },
     "node_modules/react-intl": {
       "version": "6.6.2",
       "resolved": "https://registry.npmjs.org/react-intl/-/react-intl-6.6.2.tgz",
diff --git a/src/app/utils/formatUtil.ts b/src/app/utils/formatUtil.ts
index fff7d45..a35dd02 100644
--- a/src/app/utils/formatUtil.ts
+++ b/src/app/utils/formatUtil.ts
@@ -21,6 +21,33 @@ export const OUTPUT_DATE_FORMAT = "YYYY/MM/DD";
 
 export const OUTPUT_TIME_FORMAT = "HH:mm:ss";
 
+export const truncateMoney = (amount: number | undefined) => {
+  if (!amount) {
+    return amount;
+  }
+
+  const { maximumFractionDigits, minimumFractionDigits } =
+    moneyFormatter.resolvedOptions();
+
+  const fractionDigits = maximumFractionDigits ?? minimumFractionDigits ?? 0;
+
+  const factor = Math.pow(10, fractionDigits);
+  const truncatedAmount = Math.floor(amount * factor) / factor;
+
+  return truncatedAmount;
+};
+
+export const sumMoney = (a: number, b: number) => {
+  const { maximumFractionDigits, minimumFractionDigits } =
+    moneyFormatter.resolvedOptions();
+
+  const fractionDigits = maximumFractionDigits ?? minimumFractionDigits ?? 0;
+
+  const factor = Math.pow(10, fractionDigits);
+  const sum = Math.round(a * factor) + Math.round(b * factor);
+  return sum / factor;
+};
+
 export const convertDateToString = (
   date: Date,
   format: string = OUTPUT_DATE_FORMAT,
@@ -33,8 +60,8 @@ export const convertDateArrayToString = (
   format: string = OUTPUT_DATE_FORMAT,
   needTime: boolean = false,
 ) => {
-  if (dateArray === null){
-    return "-"
+  if (dateArray === null) {
+    return "-";
   }
   if (dateArray.length === 6) {
     if (!needTime) {
@@ -48,8 +75,8 @@ export const convertDateArrayToString = (
       return dayjs(dateString).format(format);
     }
   }
-  if (dateArray.length === 0){
-    return "-"
+  if (dateArray.length === 0) {
+    return "-";
   }
 };
 
@@ -134,8 +161,8 @@ export function convertLocaleStringToNumber(numberString: string): number {
 }
 
 export function timestampToDateString(timestamp: string): string {
-  if (timestamp === null){
-    return "-"
+  if (timestamp === null) {
+    return "-";
   }
   const date = new Date(timestamp);
   const year = date.getFullYear();
diff --git a/src/components/CreateProject/BulkAddPaymentModal.tsx b/src/components/CreateProject/BulkAddPaymentModal.tsx
index 4e92d4d..ff4594e 100644
--- a/src/components/CreateProject/BulkAddPaymentModal.tsx
+++ b/src/components/CreateProject/BulkAddPaymentModal.tsx
@@ -26,6 +26,7 @@ import {
   INPUT_DATE_FORMAT,
   moneyFormatter,
   OUTPUT_DATE_FORMAT,
+  truncateMoney,
 } from "@/app/utils/formatUtil";
 import { PaymentInputs } from "@/app/api/projects/actions";
 import dayjs from "dayjs";
@@ -94,7 +95,7 @@ const BulkAddPaymentModal: React.FC<Props> = ({
       amountToDivide &&
       description
     ) {
-      const dividedAmount = amountToDivide / numberOfEntries;
+      const dividedAmount = truncateMoney(amountToDivide / numberOfEntries)!;
       return Array(numberOfEntries)
         .fill(undefined)
         .map((_, index) => {
diff --git a/src/components/CreateProject/MilestoneSection.tsx b/src/components/CreateProject/MilestoneSection.tsx
index 0275189..34f6bf8 100644
--- a/src/components/CreateProject/MilestoneSection.tsx
+++ b/src/components/CreateProject/MilestoneSection.tsx
@@ -35,6 +35,7 @@ import {
   INPUT_DATE_FORMAT,
   OUTPUT_DATE_FORMAT,
   moneyFormatter,
+  truncateMoney,
 } from "@/app/utils/formatUtil";
 import isDate from "lodash/isDate";
 import BulkAddPaymentModal from "./BulkAddPaymentModal";
@@ -148,7 +149,11 @@ const MilestoneSection: React.FC<Props> = ({ taskGroupId }) => {
       // eslint-disable-next-line @typescript-eslint/no-unused-vars
       const { _isNew, _errors, ...updatedRow } = newRow;
       setPayments((ps) =>
-        ps.map((p) => (p.id === updatedRow.id ? updatedRow : p)),
+        ps.map((p) =>
+          p.id === updatedRow.id
+            ? { ...updatedRow, amount: truncateMoney(updatedRow.amount) }
+            : p,
+        ),
       );
       return updatedRow;
     },
@@ -246,6 +251,9 @@ const MilestoneSection: React.FC<Props> = ({ taskGroupId }) => {
         width: 300,
         editable: true,
         type: "number",
+        valueGetter(params) {
+          return truncateMoney(params.value);
+        },
         valueFormatter(params) {
           return moneyFormatter.format(params.value);
         },
diff --git a/src/components/CreateProject/ProjectTotalFee.tsx b/src/components/CreateProject/ProjectTotalFee.tsx
index 0db48e5..7ff3eb0 100644
--- a/src/components/CreateProject/ProjectTotalFee.tsx
+++ b/src/components/CreateProject/ProjectTotalFee.tsx
@@ -1,6 +1,6 @@
 import { CreateProjectInputs } from "@/app/api/projects/actions";
 import { TaskGroup } from "@/app/api/tasks";
-import { moneyFormatter } from "@/app/utils/formatUtil";
+import { moneyFormatter, sumMoney } from "@/app/utils/formatUtil";
 import {
   Button,
   Divider,
@@ -52,9 +52,12 @@ const ProjectTotalFee: React.FC<Props> = ({ taskGroups }) => {
     <Stack spacing={1}>
       {taskGroups.map((group, index) => {
         const payments = milestones[group.id]?.payments || [];
-        const paymentTotal = payments.reduce((acc, p) => acc + p.amount, 0);
+        const paymentTotal = payments.reduce(
+          (acc, p) => sumMoney(acc, p.amount),
+          0,
+        );
 
-        projectTotal += paymentTotal;
+        projectTotal = sumMoney(projectTotal, paymentTotal);
 
         return (
           <Stack