diff --git a/blade-service-api/blade-transport-api/src/main/java/org/springblade/transport/pojo/dto/ReceivablePayableFeeCalculateRequest.java b/blade-service-api/blade-transport-api/src/main/java/org/springblade/transport/pojo/dto/ReceivablePayableFeeCalculateRequest.java
new file mode 100644
index 0000000..640ac83
--- /dev/null
+++ b/blade-service-api/blade-transport-api/src/main/java/org/springblade/transport/pojo/dto/ReceivablePayableFeeCalculateRequest.java
@@ -0,0 +1,66 @@
+/**
+ * BladeX Commercial License Agreement
+ * Copyright (c) 2018-2099, https://bladex.cn. All rights reserved.
+ * <p>
+ * Use of this software is governed by the Commercial License Agreement
+ * obtained after purchasing a license from BladeX.
+ * <p>
+ * 1. This software is for development use only under a valid license
+ * from BladeX.
+ * <p>
+ * 2. Redistribution of this software's source code to any third party
+ * without a commercial license is strictly prohibited.
+ * <p>
+ * 3. Licensees may copyright their own code but cannot use segments
+ * from this software for such purposes. Copyright of this software
+ * remains with BladeX.
+ * <p>
+ * Using this software signifies agreement to this License, and the software
+ * must not be used for illegal purposes.
+ * <p>
+ * THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY. The author is
+ * not liable for any claims arising from secondary or illegal development.
+ * <p>
+ * Author: Chill Zhuang (bladejava@qq.com)
+ */
+package org.springblade.transport.pojo.dto;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.Data;
+
+import java.io.Serial;
+import java.io.Serializable;
+import java.math.BigDecimal;
+import java.util.Map;
+
+/**
+ * 应收应付费用调整试算请求
+ *
+ * @author Chill
+ */
+@Data
+@Schema(description = "应收应付费用调整试算请求")
+public class ReceivablePayableFeeCalculateRequest implements Serializable {
+
+	@Serial
+	private static final long serialVersionUID = 1L;
+
+	@Schema(description = "应收应付明细ID")
+	private Long detailId;
+
+	@Schema(description = "费用行ID")
+	private Long feeId;
+
+	@Schema(description = "运输量")
+	private BigDecimal transportQuantity;
+
+	@Schema(description = "里程")
+	private BigDecimal mileage;
+
+	@Schema(description = "运输费")
+	private BigDecimal freightAmount;
+
+	@Schema(description = "动态费用项目")
+	private Map<String, BigDecimal> feeItems;
+
+}
diff --git a/doc/sql/transport/blade_receivable_payable_cargo_fee_change_reason_20260821.sql b/doc/sql/transport/blade_receivable_payable_cargo_fee_change_reason_20260821.sql
new file mode 100644
index 0000000..4642556
--- /dev/null
+++ b/doc/sql/transport/blade_receivable_payable_cargo_fee_change_reason_20260821.sql
@@ -0,0 +1,27 @@
+-- MySQL 5.7+ 兼容：为应收应付货物费用明细增加变更原因。
+-- 请在 transport 数据库执行。本脚本使用 information_schema 判断，可重复执行。
+
+DELIMITER $$
+
+DROP PROCEDURE IF EXISTS `upgrade_receivable_payable_cargo_fee_change_reason_20260821`$$
+CREATE PROCEDURE `upgrade_receivable_payable_cargo_fee_change_reason_20260821`()
+BEGIN
+  DECLARE db_name varchar(128);
+  SET db_name = DATABASE();
+
+  IF NOT EXISTS (
+    SELECT 1
+    FROM information_schema.columns
+    WHERE table_schema = db_name
+      AND table_name = 'blade_receivable_payable_cargo_fee'
+      AND column_name = 'change_reason'
+  ) THEN
+    ALTER TABLE `blade_receivable_payable_cargo_fee`
+      ADD COLUMN `change_reason` varchar(300) DEFAULT NULL COMMENT '变更原因' AFTER `remark`;
+  END IF;
+END$$
+
+CALL `upgrade_receivable_payable_cargo_fee_change_reason_20260821`()$$
+DROP PROCEDURE `upgrade_receivable_payable_cargo_fee_change_reason_20260821`$$
+
+DELIMITER ;