diff --git a/schedules/anchoring/src/anchoring/service.py b/schedules/anchoring/src/anchoring/service.py
index 2732bb1..81b86ac 100644
--- a/schedules/anchoring/src/anchoring/service.py
+++ b/schedules/anchoring/src/anchoring/service.py
@@ -25,8 +25,8 @@ def calc_price_range_index(target_price: int) -> int:
 
 
 def calc_anchoring_price(target_price: int, anchoring_value: int) -> int:
-    """앵커링가 = 목표가 × (1 − A), 1원 단위 내림. §4.2 (정수 연산만)"""
-    return target_price * (1000 - anchoring_value) // 1000
+    """앵커링가 = 목표가 × (1 − A), 10원 단위 반올림. §4.2 (정수 연산만)"""
+    return (target_price * (1000 - anchoring_value) + 5000) // 10000 * 10
 
 
 def judge_sample_type(
diff --git a/schedules/anchoring/tests/test_core.py b/schedules/anchoring/tests/test_core.py
index e3cd149..01e6aca 100644
--- a/schedules/anchoring/tests/test_core.py
+++ b/schedules/anchoring/tests/test_core.py
@@ -23,10 +23,10 @@ E = AnchoringSampleType.EXCLUDED.value
 
 
 # ── §11.1 앵커링가 계산 (내림 검증) ──────────────────────
-def test_calc_anchoring_price_floor():
+def test_calc_anchoring_price_round():
     assert calc_anchoring_price(30_000, 200) == 24_000
-    assert calc_anchoring_price(26_706, 10) == 26_438    # 26,438.94 → 내림
-    assert calc_anchoring_price(29_999, 15) == 29_549    # 29,549.015 → 내림
+    assert calc_anchoring_price(26_706, 10) == 26_440    # 26,438.94 → 10원 반올림
+    assert calc_anchoring_price(29_999, 15) == 29_550    # 29,549.015 → 10원 반올림
     assert calc_anchoring_price(0, 10) == 0