diff --git a/M01_MasterData/M01_MasterData_UI_LogicLab_Detail.ts b/M01_MasterData/M01_MasterData_UI_LogicLab_Detail.ts
index cf558b31..0a4ae57b 100644
--- a/M01_MasterData/M01_MasterData_UI_LogicLab_Detail.ts
+++ b/M01_MasterData/M01_MasterData_UI_LogicLab_Detail.ts
@@ -87,6 +87,8 @@ interface Entry {
   qty: string;
   qtyTag: string;
   qtyFrag: Fragment[];
+  /** 한 줄이 비목 몫으로 갈렸을 때 이 묶음의 몫 이름(예 「노무비」) */
+  share?: string;
   price: string;
   amount: number | null;
   /** 덧줄이면 true */
@@ -188,7 +190,12 @@ function infoBox(ctx: DetailContext): HTMLElement {
 const spread = (e: Entry, line?: CalcLine): Entry[] => {
   const parts = Object.entries(line?.비목 ?? {}).filter(([, v]) => v !== 0);
   if (!parts.length) return [e];
-  return parts.map(([k, v]) => ({ ...e, group: OF_COST[k] ?? "other", amount: v }));
+  return parts.map(([k, v]) => ({
+    ...e,
+    group: OF_COST[k] ?? "other",
+    amount: v,
+    ...(parts.length > 1 ? { share: k } : {}),
+  }));
 };
 
 function entries(ctx: DetailContext): Entry[] {
@@ -275,6 +282,9 @@ function lineRow(e: Entry): HTMLElement {
       el("td", {
         children: [
           el("div", { text: e.name }),
+          ...(e.share
+            ? [el("div", { className: "m01-logic__tag", text: `${e.share} ${tl("Share")}` })]
+            : []),
           ...(e.spec ? [el("div", { className: "m01-logic__muted", text: e.spec })] : []),
         ],
       }),
diff --git a/M01_MasterData/M01_MasterData_UI_LogicLab_Text.ts b/M01_MasterData/M01_MasterData_UI_LogicLab_Text.ts
index c4d691ec..9288970a 100644
--- a/M01_MasterData/M01_MasterData_UI_LogicLab_Text.ts
+++ b/M01_MasterData/M01_MasterData_UI_LogicLab_Text.ts
@@ -30,6 +30,7 @@ const TEXT = {
   G_other: ["그 밖 (인력·자재·경비 어디에도 안 맞는 줄)", "Other (fits none of the three)"],
   Tag_Table: ["표", "Table"],
   Subtotal: ["소계", "Subtotal"],
+  Share: ["몫", "Share"],
   Total: ["계", "Total"],
   Extra: ["덧줄", "Extra"],
   Col_Name: ["이름", "Name"],
diff --git a/M01_MasterData/M01_MasterData_UI_Logic_Calc.ts b/M01_MasterData/M01_MasterData_UI_Logic_Calc.ts
index 484592d7..6d1e84d0 100644
--- a/M01_MasterData/M01_MasterData_UI_Logic_Calc.ts
+++ b/M01_MasterData/M01_MasterData_UI_Logic_Calc.ts
@@ -139,7 +139,12 @@ export function buildCalc(host: HTMLElement, ctx: CalcContext): void {
       ctx.onText?.(answer);
     });
   }
-  if (ctx.savedKey !== null && !autoAsked.has(ctx.values)) {
+  if (!fields.length && !autoAsked.has(ctx.values)) {
+    autoAsked.add(ctx.values); // 입력이 없으면 채울 것이 없음 — 열 때 한 번 바로 계산
+    queueMicrotask(() => {
+      if (previewSeq === mySeqAtOpen) host.querySelector("button")?.click();
+    });
+  } else if (ctx.savedKey !== null && !autoAsked.has(ctx.values)) {
     autoAsked.add(ctx.values);
     void fetchAuto(ctx.savedKey).then((auto) => {
       const names = (ctx.row.입력 ?? [])