diff --git a/yuthon_report/models/penalty_arrears_report.py b/yuthon_report/models/penalty_arrears_report.py
index 98fca983a..982d143e5 100644
--- a/yuthon_report/models/penalty_arrears_report.py
+++ b/yuthon_report/models/penalty_arrears_report.py
@@ -373,7 +373,139 @@ class PenaltyArrearsReport(models.Model):
                 "所属公司": rent_rec.company_id.name if rent_rec.company_id else "",
             })
 
-        # ========== 五、构建统计汇总数据 ==========
+        # ========== 五、来源C：从未收/收部分租金直接出发，动态计算违约金 ==========
+        # 覆盖场景：租金一直没交钱，既没有 is_batch 违约金应收单(来源A)，
+        #           也没有任何 modify.line 收款记录(来源B)，但产生了动态违约金
+        # 入口：property.accounts.receivable 中 deposit_state in [unpaid, no_paid] 的租金记录
+        #       且不在来源A、来源B中出现过的
+
+        # --- 5.1 构建已处理的租金ID集合 ---
+        # 来源A中关联到的租金ID
+        source_a_rent_ids = set()
+        for penalty_rec in penalty_a_recs:
+            if penalty_rec.source_receivable_id:
+                source_a_rent_ids.add(penalty_rec.source_receivable_id.id)
+        # 来源B中涉及到的租金ID（即 rent_penalty_collected 的 key 集合）
+        source_b_rent_ids = set(rent_penalty_collected.keys())
+
+        # --- 5.2 查询未收/收部分的租金记录（排除已处理过的）---
+        # 收款类型为"租金"的记录（非违约金），且状态是未收或收部分
+        rent_domain = [
+            ('management_type_id.name', '!=', '违约金'),  # 收款类型非违约金（即租金）
+            ('deposit_state', 'in', ['unpaid', 'no_paid']),  # 未收或收部分
+            ('is_invalid', '!=', True),  # 排除作废
+        ]
+        if query_date:
+            rent_domain.append(('due_date', '<=', query_date))  # 应收日已过，才开始产生违约金
+
+        unpaid_rent_recs = self.sudo().search(rent_domain, order="contract_id asc, due_date asc")
+
+        for rent_rec in unpaid_rent_recs:
+            # 跳过已经在来源A、B中处理过的租金
+            if rent_rec.id in source_a_rent_ids or rent_rec.id in source_b_rent_ids:
+                continue
+
+            # 内存过滤
+            prop_name = rent_rec.property_name or ""
+            if not _match_filters(rent_rec, prop_name):
+                continue
+
+            due_date = rent_rec.due_date
+            if not due_date:
+                continue
+
+            # --- 计算违约金起始日期：应收月的次月1号 ---
+            if due_date.month == 12:
+                penalty_start = datetime.date(due_date.year + 1, 1, 1)
+            else:
+                penalty_start = datetime.date(due_date.year, due_date.month + 1, 1)
+
+            # 违约金起始日期 > 查询日期，还没开始产生违约金
+            if query_date and penalty_start > query_date:
+                continue
+
+            # --- 获取违约金计算比例 ---
+            penalty_rate = _get_penalty_rate(rent_rec.contract_id)
+
+            # --- 动态计算违约金总额 ---
+            # 这笔租金没有任何 modify.line 收款记录，所以本金就是全额
+            rent_amount = (rent_rec.original_amount or 0.0) - (rent_rec.discount_amount or 0.0)
+            current_principal = rent_amount
+            total_calc_penalty = 0.0
+            calc_range_parts = []
+
+            # 从 penalty_start 到查询日期，整段计算
+            if current_principal > 0 and query_date and penalty_start <= query_date:
+                days = (query_date - penalty_start).days + 1
+                if days > 0:
+                    segment_penalty = current_principal * days * penalty_rate
+                    total_calc_penalty += segment_penalty
+                    calc_range_parts.append(
+                        f"{penalty_start.strftime('%Y-%m-%d')}至{query_date.strftime('%Y-%m-%d')} "
+                        f"({days}天×{current_principal:.2f}×{penalty_rate})"
+                    )
+
+            total_calc_penalty = round(total_calc_penalty, 2)
+            if total_calc_penalty <= 0:
+                continue
+
+            # 来源C：没有收到过任何钱，所以已收=0，未收=总额
+            penalty_collected_amt = 0.0
+            penalty_uncollected_amt = total_calc_penalty
+
+            # 去重 key
+            key = ('C', rent_rec.id)
+            if key in processed_keys:
+                continue
+            processed_keys.add(key)
+
+            # 租金信息
+            rent_collected_amt = round(rent_rec.delivered1 or 0.0, 2)
+            rent_uncollected_amt = round(rent_rec.submitted or 0.0, 2)
+            rent_status = ""
+            if rent_rec.deposit_state == 'paid':
+                rent_status = "已收"
+            elif rent_rec.deposit_state == 'no_paid':
+                rent_status = "收部分"
+            else:
+                rent_status = "未收"
+
+            # 累计统计
+            total_penalty += total_calc_penalty
+            total_uncollected += penalty_uncollected_amt
+
+            contract = rent_rec.contract_id
+            rows.append({
+                "来源": "C",
+                "租金ID": rent_rec.id,
+                "租金应收日": due_date.strftime("%Y-%m-%d"),
+                "租金收款日期": rent_rec.payout_date.strftime("%Y-%m-%d") if rent_rec.payout_date else "",
+                "租金金额": round(rent_amount, 2),
+                "租金已收": rent_collected_amt,
+                "租金未收": rent_uncollected_amt,
+                "租金状态": rent_status,
+                "违约金金额": total_calc_penalty,
+                "违约金已收": penalty_collected_amt,
+                "违约金未收": penalty_uncollected_amt,
+                "违约金状态": "动态",  # 纯动态计算，无任何收款记录
+                "违约金应收开始": penalty_start.strftime("%Y-%m-%d"),
+                "收费区间": "\n".join(calc_range_parts) if calc_range_parts else "",
+                "备注": "未收租金，动态计算违约金",
+                "合同编号": {
+                    'model': 'property.lease.contract',
+                    'id': contract.id,
+                    'display_name': contract.contract_code,
+                } if contract else "",
+                "物业名称": _build_property_display(contract, prop_name),
+                "承租方名称": {
+                    'model': 'property.tenant.information',
+                    'id': rent_rec.lessee_id.id,
+                    'display_name': rent_rec.lessee_id.name,
+                } if rent_rec.lessee_id else "",
+                "所属公司": rent_rec.company_id.name if rent_rec.company_id else "",
+            })
+
+        # ========== 六、构建统计汇总数据 ==========
         stats = [
             {'name': '记录总数', 'amount': len(rows)},
             {'name': '违约金总额', 'amount': round(total_penalty, 2)},
@@ -381,7 +513,7 @@ class PenaltyArrearsReport(models.Model):
             {'name': '违约金未收', 'amount': round(total_uncollected, 2)},
         ]
 
-        _logger.info("[PENALTY_ARREARS] query_date=%s, source_a=%d, source_b_rents=%d, total_rows=%d",
-                     query_date, len(penalty_a_recs), len(rent_recs_b), len(rows))
+        _logger.info("[PENALTY_ARREARS] query_date=%s, source_a=%d, source_b_rents=%d, source_c_rents=%d, total_rows=%d",
+                     query_date, len(penalty_a_recs), len(rent_recs_b), len(unpaid_rent_recs), len(rows))
 
         return {"rows": rows, "stats": stats}