diff --git a/M02_MasterTemplete/M02_MasterTemplete_Sangeun_Cover.ts b/M02_MasterTemplete/M02_MasterTemplete_Sangeun_Cover.ts
index 3b6323be5..48a4063b1 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_Sangeun_Cover.ts
+++ b/M02_MasterTemplete/M02_MasterTemplete_Sangeun_Cover.ts
@@ -12,6 +12,7 @@
 
 import { createBadge } from "@ui/ui_template_badge";
 import { createButton } from "@ui/ui_template_button";
+import { createCheckbox } from "@ui/ui_template_checkbox";
 import { el } from "@ui/ui_template_elements";
 import { createInputField } from "@ui/ui_template_input";
 import { t as L } from "@ui/ui_template_locale";
@@ -181,6 +182,8 @@ export interface SkCoverOptions {
   onPrice: (row: CoverRow, value: number | null) => void;
   onDrop: (row: CoverRow) => void;
   onRestore: (cid: string) => void;
+  /** 더한 재료 줄 별도계상 켬 · 끔 */
+  onApart: (row: CoverRow, on: boolean) => void;
 }
 
 const ORDER = ["인력", "재료", "경비", "하위"];
@@ -243,7 +246,18 @@ function rowCells(r: CoverRow, o: SkCoverOptions): (string | Node)[] {
     ...(r.covered.qty || r.covered.price ? [createBadge(o.tag, "warning")] : []),
     ...(r.added !== null ? [createBadge(L("M02_SangeunAddedTag"), "accent")] : []),
     ...(r.pct ? [createBadge(L("M02_SangeunPct"), "neutral")] : []),
-    ...(r.apart ? [createBadge(L("M02_SangeunApart"), "neutral")] : []),
+    ...(can && r.apartPick
+      ? [
+          createCheckbox(L("M02_SangeunApart"), {
+            chip: true,
+            size: 22,
+            checked: r.apart,
+            onChange: (on) => o.onApart(r, on),
+          }).root,
+        ]
+      : r.apart
+        ? [createBadge(L("M02_SangeunApart"), "neutral")]
+        : []),
     ...(r.revised ? [createBadge(L("M02_SangeunRevised"), "danger")] : []),
   ];
   const drop = createButton({
diff --git a/M02_MasterTemplete/M02_MasterTemplete_Sangeun_Detail.ts b/M02_MasterTemplete/M02_MasterTemplete_Sangeun_Detail.ts
index f375e4bd3..274ab9d44 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_Sangeun_Detail.ts
+++ b/M02_MasterTemplete/M02_MasterTemplete_Sangeun_Detail.ts
@@ -33,6 +33,7 @@ import { openSangeunLinePicker } from "./M02_MasterTemplete_Sangeun_Pick";
 import {
   dropLine,
   restoreLine,
+  setApart,
   rowsOf,
   setPrice,
   setQty,
@@ -231,6 +232,7 @@ export function mountSangeunDetail(
       onPrice: (r, v) => (setPrice(doc, r, v), touch()),
       onDrop: (r) => (dropLine(doc, r), touch()),
       onRestore: (cid) => (restoreLine(doc, cid), touch()),
+      onApart: (r, on) => (setApart(doc, r, on), touch()),
     });
     const row = base?.logic ?? standIn();
     const est = el("div", {
diff --git a/M02_MasterTemplete/M02_Sangeun_Doc.py b/M02_MasterTemplete/M02_Sangeun_Doc.py
index f9c04e50d..0a0427eb3 100644
--- a/M02_MasterTemplete/M02_Sangeun_Doc.py
+++ b/M02_MasterTemplete/M02_Sangeun_Doc.py
@@ -6,7 +6,8 @@
      입력값 {이름: 값}, 열린입력 [이름](설계 때 정함 · 그 SK 품 덮개 = 배율만), 켜쌓기율?,
      고름 {cid: MT키}, 자재표시 {cid: {세 칸}},
      덮개 {cid: {qty | 배율, labor, material, expense, 원값}},
-     더한줄 [{종류: 인력|재료|기계, 요소, 이름, 단위, 수량, 비목?, 단가?}
+     더한줄 [{종류: 인력|재료|기계, 요소, 이름, 단위, 수량, 비목?, 단가?,
+             별도계상?(재료 · 없음 = 계 안)}
             | {종류: 로직, 로직, 입력값, 수량} | {참조 | 고정, 이름?, 단위?, 수량}],
      뺀줄 [cid], 바탕판}
 줄 정체 cid = `kind:키#n`(B09 702 덮개 꼴) — kind = labor · material · machine · logic · pct(덧줄) ·
@@ -179,6 +180,8 @@ def _added(raw: Any, where: str, whole: Any) -> dict:
         head = {"종류": raw["종류"], "요소": key, "비목": part}
         if raw.get("단가") is not None:
             head["단가"] = plain(_num(raw["단가"], f"{where} 단가"))
+        if raw["종류"] == "재료" and raw.get("별도계상") is True:
+            head["별도계상"] = True  # 더한 재료 기본 = 계 안 · 이 칸만 별도계상(`patched` 자재표시)
         name = name or str((got or {}).get("이름") or key)
         unit = unit or str((got or {}).get("단위") or "")
     else:
@@ -360,6 +363,10 @@ def patched(
         new_items.append(item)
         cids.append(cid)
     for k, one in enumerate(doc.get("더한줄") or []):
+        if one.get("종류") == "재료":  # 더한 재료 = 기본 계 안(직접계산) · `별도계상` 칸만 밖
+            out_marks[str(len(new_items))] = {
+                "별도계상": "별도계상" if one.get("별도계상") else "직접계산"
+            }
         new_items.append(_add_item(one))
         cids.append(f"add:#{k}")
     cids += [c for at, c in enumerate(ids) if at >= len(items) and c not in drop]
diff --git a/M02_MasterTemplete/logic/M02_Sangeun_Cover_Model.ts b/M02_MasterTemplete/logic/M02_Sangeun_Cover_Model.ts
index 13a288be4..22cd4cfff 100644
--- a/M02_MasterTemplete/logic/M02_Sangeun_Cover_Model.ts
+++ b/M02_MasterTemplete/logic/M02_Sangeun_Cover_Model.ts
@@ -107,6 +107,8 @@ export interface CoverRow {
   /** 저장 때 적힌 원값이 지금 바탕 값과 다름(M01 개정) */
   revised: boolean;
   priceEdit: boolean;
+  /** 더한 재료 줄 — 별도계상 고름(기본 계 안) */
+  apartPick: boolean;
 }
 
 /* ── 순수 셈 ── */
@@ -183,6 +185,7 @@ export function rowsOf(ans: SkAnswer, bare: SkAnswer | null, doc: SkDoc): CoverR
         ((old.qty != null && !near(old.qty, base.qty)) ||
           (old.단가 != null && !near(old.단가, base.단가))),
       priceEdit: !pct && (added === null || ["인력", "재료", "기계"].includes(String(one?.종류))),
+      apartPick: one?.종류 === "재료",
     };
   };
   for (const l of ans.줄) rows.push(row(l.cid, l, partsOf(l), l));
@@ -263,6 +266,14 @@ export function dropLine(doc: SkDoc, r: CoverRow): void {
   }
 }
 
+/** 더한 재료 줄 별도계상 — 켬 = 계 밖(재료 목록만 · 서버 자재표시) · 끔 = 칸 지움(기본 계 안) */
+export function setApart(doc: SkDoc, r: CoverRow, on: boolean): void {
+  const one = r.added === null ? undefined : doc.더한줄?.[r.added];
+  if (!one || one.종류 !== "재료") return;
+  if (on) one.별도계상 = true;
+  else delete one.별도계상;
+}
+
 /** 뺀 줄 되살림 */
 export function restoreLine(doc: SkDoc, cid: string): void {
   doc.뺀줄 = (doc.뺀줄 ?? []).filter((c) => c !== cid);
diff --git a/resources/tester/test_715_sangeun_engine.py b/resources/tester/test_715_sangeun_engine.py
index c3b6847f3..4961a6020 100644
--- a/resources/tester/test_715_sangeun_engine.py
+++ b/resources/tester/test_715_sangeun_engine.py
@@ -84,3 +84,17 @@ def test_added_ref_and_fixed_lines(world):
     assert got["기준"]["계"] == pytest.approx(unit * 2 + 5000, abs=1)
     expense = labor.run_line(_whole(), PCT, {})["기준"]["경비"]
     assert got["기준"]["경비"] == pytest.approx(5000 + 2 * float(expense), abs=1)
+
+
+def test_added_material_counts_unless_apart():
+    """사용자가 더한 재료 줄 = 기본 계 안(재료비 · 계에 더함) · 줄 「별도계상」 칸만 계 밖(재료 목록만)."""
+    one = {"종류": "재료", "요소": "MT000010", "수량": 3, "단가": 1200}
+    bare = _run(바탕={"로직": PCT})
+    inside = _run(바탕={"로직": PCT}, 더한줄=[one])
+    assert inside["기준"]["재료비"] == pytest.approx(bare["기준"]["재료비"] + 3600)
+    assert inside["기준"]["계"] == pytest.approx(bare["기준"]["계"] + 3600, abs=1)
+    assert any(x["cid"] == "add:#0" for x in inside["줄"])
+    apart = _run(바탕={"로직": PCT}, 더한줄=[{**one, "별도계상": True}])
+    assert apart["기준"]["계"] == pytest.approx(bare["기준"]["계"])
+    assert not any(x["cid"] == "add:#0" for x in apart["줄"])
+    assert any(m["금액"] == pytest.approx(3600) for m in apart["재료"])
diff --git a/resources/tester/test_717_2b_sangeun_detail.py b/resources/tester/test_717_2b_sangeun_detail.py
index 1318a36ab..685c70b5f 100644
--- a/resources/tester/test_717_2b_sangeun_detail.py
+++ b/resources/tester/test_717_2b_sangeun_detail.py
@@ -74,6 +74,11 @@ out.split = doc.덮개["logic:G#0"];
 setQty(doc, by("add:#0"), 3, false);
 setPrice(doc, by("add:#0"), 350);
 out.added = doc.더한줄[0];
+out.pick = [by("add:#0").apartPick, by("labor:A#0").apartPick];
+setApart(doc, by("add:#0"), true);
+out.apartOn = doc.더한줄[0].별도계상 ?? null;
+setApart(doc, by("add:#0"), false);
+out.apartOff = doc.더한줄[0].별도계상 ?? null;
 const opened = { 덮개: {} };
 setQty(opened, by("labor:A#0"), 1.5, true);
 out.scale = opened.덮개["labor:A#0"];
@@ -105,6 +110,9 @@ console.log(JSON.stringify(out));
     assert got["split"]["labor"] == 60 and got["split"]["material"] == 30
     assert got["split"]["expense"] == 10
     assert got["added"]["수량"] == 3 and got["added"]["단가"] == 350
+    # 더한 재료 줄만 별도계상 고름 · 켬 = 칸 true · 끔 = 칸 지움(기본 계 안)
+    assert got["pick"] == [True, False]
+    assert got["apartOn"] is True and got["apartOff"] is None
     assert got["scale"]["배율"] == 1.5 and "qty" not in got["scale"]
     assert got["scaleBack"] is None
     assert got["drop"] == [["labor:A#0"], None]