diff --git a/serverless.yml b/serverless.yml
index ad28250..d987f51 100644
--- a/serverless.yml
+++ b/serverless.yml
@@ -182,11 +182,3 @@ functions:
       uri: ${file(envs/config.${self:provider.stage}.json):BILL_OCR_IMAGE_URI}
     timeout: 300
     memorySize: 2048
-    events:
-      - s3:
-          bucket: ${file(envs/config.${self:provider.stage}.json):BILL_BUCKET_NAME}
-          event: s3:ObjectCreated:Put
-          rules:
-            - prefix: "bills/"
-          existing: true
-          forceDeploy: true
diff --git a/src/dto/bill_dto.py b/src/dto/bill_dto.py
new file mode 100644
index 0000000..d8e291e
--- /dev/null
+++ b/src/dto/bill_dto.py
@@ -0,0 +1,47 @@
+"""
+관리비(Bill) 관련 DTO 클래스들을 정의합니다.
+"""
+
+from typing import Optional, Any
+from dataclasses import dataclass
+from .base_dto import BaseDTO
+
+
+@dataclass
+class BillDTO(BaseDTO):
+    """단일 관리비 응답 DTO"""
+
+    id: Optional[int]
+    studentNo: str
+    type: str
+    amount: Optional[float]
+    endDate: Optional[str]  # YYYY-MM-DD
+    bankInfo: Optional[list[dict[str, Optional[str]]]]
+
+    @classmethod
+    def from_supabase_data(cls, data: dict) -> "BillDTO":
+        """Supabase row(snake_case) -> DTO(camelCase) 매핑"""
+        return cls(
+            id=data.get("id"),
+            studentNo=data.get("student_no", ""),
+            type=data.get("type", ""),
+            amount=data.get("amount"),
+            endDate=(
+                str(data.get("end_date")) if data.get("end_date") is not None else None
+            ),
+            bankInfo=data.get("bank_info"),
+        )
+
+
+@dataclass
+class BillListDTO(BaseDTO):
+    """관리비 목록 응답 DTO"""
+
+    items: list[BillDTO]
+
+    def to_dict(self) -> list[dict[str, Any]]:
+        return [item.to_dict() for item in self.items]
+
+    @classmethod
+    def from_supabase_data(cls, rows: list[dict]) -> "BillListDTO":
+        return cls(items=[BillDTO.from_supabase_data(row) for row in rows])