diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/biz-cst-matrix-utils.ts b/apps/as/src/pages/sewer-bsc-plan/lib/biz-cst-matrix-utils.ts
index 41ff8e9da..74867acd6 100644
--- a/apps/as/src/pages/sewer-bsc-plan/lib/biz-cst-matrix-utils.ts
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/biz-cst-matrix-utils.ts
@@ -1,4 +1,4 @@
-import type { CostItemDef } from "@/widgets/pbadms-sprt/lib/business-cost-form-utils";
+import { type CostItemDef, roundAmount } from "@/widgets/pbadms-sprt";
 
 export interface BizCstMatrixItem {
   planStpNo: number;
@@ -45,9 +45,11 @@ function recalculateBizCstMatrix(
     if (!item.readonly || !item.children) continue;
 
     for (const planStpNo of PLAN_STEPS) {
-      const childSum = item.children.reduce(
-        (sum, childCode) => sum + getAmt(next, childCode, planStpNo),
-        0,
+      const childSum = roundAmount(
+        item.children.reduce(
+          (sum, childCode) => sum + getAmt(next, childCode, planStpNo),
+          0,
+        ),
       );
       const current = getAmt(next, item.code, planStpNo);
       if (current !== childSum) {
diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/fnrs-cst-form-utils.ts b/apps/as/src/pages/sewer-bsc-plan/lib/fnrs-cst-form-utils.ts
index a6ed6b94b..57de61985 100644
--- a/apps/as/src/pages/sewer-bsc-plan/lib/fnrs-cst-form-utils.ts
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/fnrs-cst-form-utils.ts
@@ -1,4 +1,4 @@
-import type { CostItemDef } from "@/widgets/pbadms-sprt/lib/business-cost-form-utils";
+import { type CostItemDef, roundAmount } from "@/widgets/pbadms-sprt";
 
 import { type BizCstMatrixItem,getAmt, PLAN_STEPS } from "./biz-cst-matrix-utils";
 
@@ -31,11 +31,11 @@ function getBizCstStepTotal(
 }
 
 function sumFnrsCstLeaf(item: FnrsCstItem): number {
-  return (
+  return roundAmount(
     (item.gvexpAmt ?? 0) +
-    (item.lcexpAmt ?? 0) +
-    (item.orgprBdchgAmt ?? 0) +
-    (item.etcAmt ?? 0)
+      (item.lcexpAmt ?? 0) +
+      (item.orgprBdchgAmt ?? 0) +
+      (item.etcAmt ?? 0),
   );
 }
 
@@ -55,7 +55,7 @@ function calcFnrsCstRemaining(
     const bizTotal = getBizCstStepTotal(bizCstList, costItems, planStpNo);
     const fnrsItem = fnrsCstList.find((item) => item.planStpNo === planStpNo);
     const sharTotal = fnrsItem ? sumFnrsCstLeaf(fnrsItem) : 0;
-    return { planStpNo, remaining: bizTotal - sharTotal };
+    return { planStpNo, remaining: roundAmount(bizTotal - sharTotal) };
   });
 }
 
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sections/fnrs-cst-form-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/fnrs-cst-form-section.tsx
index c27e2d34b..3779c4c22 100644
--- a/apps/as/src/pages/sewer-bsc-plan/ui/sections/fnrs-cst-form-section.tsx
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sections/fnrs-cst-form-section.tsx
@@ -154,8 +154,7 @@ function FnrsCstFormSection() {
                     <TableCell key={planStpNo}>
                       <Field>
                         <Input
-                          type="text"
-                          inputMode="decimal"
+                          type="number"
                           className={cn("text-right", row.readonly && "bg-muted")}
                           readOnly={row.readonly}
                           disabled={row.readonly}
diff --git a/apps/as/src/widgets/pbadms-sprt/index.ts b/apps/as/src/widgets/pbadms-sprt/index.ts
index b1a1081d2..0dd7d8157 100644
--- a/apps/as/src/widgets/pbadms-sprt/index.ts
+++ b/apps/as/src/widgets/pbadms-sprt/index.ts
@@ -30,7 +30,7 @@ export {
   toFnrsSharSaveList,
   validateBizCstSharBalance,
 } from "./lib/fnrs-shar-form-utils";
-export { calcDiffPercent, fmtNumber, indentPx } from "./lib/format-utils";
+export { calcDiffPercent, fmtNumber, indentPx, roundAmount } from "./lib/format-utils";
 export { AttachmentsFormSection } from "./ui/attachments-form-section";
 export { AttachmentsViewSection } from "./ui/attachments-view-section";
 export { BusinessCostFormSection } from "./ui/business-cost-form-section";
diff --git a/apps/as/src/widgets/pbadms-sprt/lib/business-cost-form-utils.ts b/apps/as/src/widgets/pbadms-sprt/lib/business-cost-form-utils.ts
index d27b9eb85..b6d415675 100644
--- a/apps/as/src/widgets/pbadms-sprt/lib/business-cost-form-utils.ts
+++ b/apps/as/src/widgets/pbadms-sprt/lib/business-cost-form-utils.ts
@@ -1,5 +1,7 @@
 import type { AcntgSeMngTreeDto } from "@/entities/acntg";
 
+import { roundAmount } from "./format-utils";
+
 export interface CostItemDef {
   code: string;
   label: string;
@@ -29,7 +31,11 @@ function sumChildAmounts(list: BizCstListItem[], childCodes: string[]) {
     }
   });
 
-  return { bscPlanAmt, bgtRfltAmt, tstmDesignAmt };
+  return {
+    bscPlanAmt: roundAmount(bscPlanAmt),
+    bgtRfltAmt: roundAmount(bgtRfltAmt),
+    tstmDesignAmt: roundAmount(tstmDesignAmt),
+  };
 }
 
 export function buildAcntgCostItems(tree: AcntgSeMngTreeDto[]): CostItemDef[] {
diff --git a/apps/as/src/widgets/pbadms-sprt/lib/business-scale-form-utils.ts b/apps/as/src/widgets/pbadms-sprt/lib/business-scale-form-utils.ts
index 33ad22cd5..d50711bb9 100644
--- a/apps/as/src/widgets/pbadms-sprt/lib/business-scale-form-utils.ts
+++ b/apps/as/src/widgets/pbadms-sprt/lib/business-scale-form-utils.ts
@@ -1,5 +1,7 @@
 import type { CnstpSeMngTreeDto } from "@/entities/cnstp";
 
+import { roundAmount } from "./format-utils";
+
 export interface ScaleItemDef {
   code: string;
   label: string;
@@ -30,13 +32,17 @@ function sumChildScale(list: BzScaleListItem[], childCodes: string[]) {
     }
   });
 
-  return { bscPl, budgetReflct, thtiDsgn };
+  return {
+    bscPl: roundAmount(bscPl),
+    budgetReflct: roundAmount(budgetReflct),
+    thtiDsgn: roundAmount(thtiDsgn),
+  };
 }
 
 function withDiff(item: BzScaleListItem): BzScaleListItem {
   const budgetReflct = item.budgetReflct || 0;
   const thtiDsgn = item.thtiDsgn || 0;
-  return { ...item, diff: thtiDsgn - budgetReflct };
+  return { ...item, diff: roundAmount(thtiDsgn - budgetReflct) };
 }
 
 export function buildCnstpScaleItems(tree: CnstpSeMngTreeDto[]): ScaleItemDef[] {
diff --git a/apps/as/src/widgets/pbadms-sprt/lib/fnrs-shar-form-utils.ts b/apps/as/src/widgets/pbadms-sprt/lib/fnrs-shar-form-utils.ts
index fa0fc7908..4700fdac1 100644
--- a/apps/as/src/widgets/pbadms-sprt/lib/fnrs-shar-form-utils.ts
+++ b/apps/as/src/widgets/pbadms-sprt/lib/fnrs-shar-form-utils.ts
@@ -2,6 +2,7 @@ import type { FnrsSharItem } from "@/entities/fnrs-cnsltn";
 import type { FnrsSharBizCstTreeDto, FnrsSharSeMngTreeDto } from "@/entities/fnrs-shar-se";
 
 import type { BizCstListItem, CostItemDef } from "./business-cost-form-utils";
+import { roundAmount } from "./format-utils";
 
 export interface FnrsSharItemDef {
   code: string;
@@ -78,7 +79,10 @@ function sumChildSharAmounts(list: FnrsSharListItem[], childCodes: string[]) {
     chgRqtAmt += child.chgRqtAmt || 0;
   });
 
-  return { exstnAmt, chgRqtAmt };
+  return {
+    exstnAmt: roundAmount(exstnAmt),
+    chgRqtAmt: roundAmount(chgRqtAmt),
+  };
 }
 
 export function recalculateFnrsSharTotals(
@@ -103,7 +107,7 @@ export function recalculateFnrsSharTotals(
         ...current,
         exstnAmt,
         chgRqtAmt,
-        ajmtAmt: exstnAmt - chgRqtAmt,
+        ajmtAmt: roundAmount(exstnAmt - chgRqtAmt),
       };
       hasChanges = true;
     }
@@ -158,7 +162,10 @@ export function sumFnrsSharLeafAmounts(
     chgRqtAmt += row.chgRqtAmt || 0;
   });
 
-  return { exstnAmt, chgRqtAmt };
+  return {
+    exstnAmt: roundAmount(exstnAmt),
+    chgRqtAmt: roundAmount(chgRqtAmt),
+  };
 }
 
 export function calcBizCstSharRemaining(
@@ -171,8 +178,8 @@ export function calcBizCstSharRemaining(
   const leafSum = sumFnrsSharLeafAmounts(sharList, sharItems);
 
   return {
-    exstnRemaining: bizCstTotal.bscPlanAmt - leafSum.exstnAmt,
-    chgRqtRemaining: bizCstTotal.tstmDesignAmt - leafSum.chgRqtAmt,
+    exstnRemaining: roundAmount(bizCstTotal.bscPlanAmt - leafSum.exstnAmt),
+    chgRqtRemaining: roundAmount(bizCstTotal.tstmDesignAmt - leafSum.chgRqtAmt),
   };
 }
 
@@ -201,7 +208,7 @@ export function toFnrsSharSaveList(list: FnrsSharListItem[]): FnrsSharItem[] {
     fnrsSharSeCd: row.fnrsSharSeCd,
     exstnAmt: row.exstnAmt || 0,
     chgRqtAmt: row.chgRqtAmt || 0,
-    ajmtAmt: (row.exstnAmt || 0) - (row.chgRqtAmt || 0),
+    ajmtAmt: roundAmount((row.exstnAmt || 0) - (row.chgRqtAmt || 0)),
     rmrkCn: row.rmrkCn,
   }));
 }
@@ -239,7 +246,7 @@ export function mapFnrsSharDetToFormList(tree: FnrsSharBizCstTreeDto[]): FnrsSha
       fnrsSharSeCd: item.code,
       exstnAmt,
       chgRqtAmt,
-      ajmtAmt: exstnAmt - chgRqtAmt,
+      ajmtAmt: roundAmount(exstnAmt - chgRqtAmt),
       rmrkCn: node?.rmrkCn ?? "",
     };
   });
diff --git a/apps/as/src/widgets/pbadms-sprt/lib/format-utils.ts b/apps/as/src/widgets/pbadms-sprt/lib/format-utils.ts
index 8fa24d3cb..084674eb0 100644
--- a/apps/as/src/widgets/pbadms-sprt/lib/format-utils.ts
+++ b/apps/as/src/widgets/pbadms-sprt/lib/format-utils.ts
@@ -18,6 +18,13 @@ export function indentPx(indNm: string | undefined): number {
   return (spaces / 4) * 16;
 }
 
+const AMOUNT_DECIMAL_PLACES = 2;
+
+export function roundAmount(value: number): number {
+  const factor = 10 ** AMOUNT_DECIMAL_PLACES;
+  return Math.round((value + Number.EPSILON) * factor) / factor;
+}
+
 export function calcDiffPercent(diff: number, baseline: number): string {
   if (baseline === 0) return "-";
   return `${Math.round((diff / baseline) * 100)}%`;