我为何会具有负数余额？
如果您应付费用和发起的退款在结算周期内超过销售额，则您的卖家账户余额可能为负。您的付款报告将提供您账户所有存入和支出款项的详细一览。
费用：费用因卖家类型、所售商品以及所用服务而异。您可转到付款报告交易一览选项卡，并点击一个订单总金额，查看订单级别的费用详情。您也可参阅亚马逊服务商业解决方案协议和“我要开店”费用价目表，了解有关您卖家账户的费用信息。
商品退款：如果您针对已收到付款的某件商品发起了退款，则亚马逊将向您收取退款全部金额以及退款管理费，并减去该订单任何适用的销售佣金费用。例如，如果某一商品分类的销售佣金为 15%，而您要对总销售价格为 10.00 美元的商品向买家退款，则您将看到 8.80 美元的扣款（10.00 美元的总销售价格 + 0.30 美元的退款管理费 - 1.50 美元的销售佣金）。有关退款管理费的更多信息，请参阅亚马逊服务商业解决方案协议。
亚马逊官网原文详情：
Why do I have a negative balance?
Your seller account may have a negative balance if the amount of fees you owe and refunds you have issued exceeds your sales during a settlement period. Your Payments Report provides a detailed summary of all credits and charges applied to your account.
Fees: Fees differ depending on your seller type, the items you sell, and the services you use. You can see order-level details of fees you have incurred by going to the Transaction View tab of your Payments Report and clicking on an order total amount. You can also refer to the Amazon Services Business Solutions Agreement and the Selling on Amazon Fee Schedule for information on fees associated with your seller account.
Product refunds: If you issue a refund for a product for which you have already received payment, Amazon will charge you the full amount of the refund, plus the refund administration fee, minus the cost of any applicable referral fees from the order. For example, if you refund a customer the $10.00 total sales price of a product in a category with a 15% referral fee, you will see a charge for $8.80 ($10.00 total sales price + $0.30 refund administration fee - $1.50 referral fee). For more information about refund administration fees, please refer to the Amazon Services Business Solutions Agreement.
文章来源：亚马逊官方网站
