在阅读文章前，辛苦您点下"关注"，方便讨论和分享。作者定会不负众望，按时按量创作出 更优质的内容。 假如你是一个跨境电商卖家，每天睁开眼睛要盯汇率，关税政策一变动，利润就被吞掉一大块，好不容 易算清楚成本，却突然又冒出一个更大的隐忧——美国国税局（IRS）盯上了你。 是不是以后所有来自美国的收入，都要严格缴纳联邦所得税？是不是FBA、第三方海外仓、自营仓这些 模式，都可能被认定为"在美国从事贸易"？ 这不是危言耸听，监管正在变严，"合规"已不再是选择题，而是生死门。 税务这根"紧箍咒"，早就戴上了 其实美国的法律并没有突然变，只要构成"有效关联收入（ECI）"，理论上就该纳税。 只是过去监管松、查得少，很多人觉得"不交也没事"，可现在不同了，IRS动用了AI、大数据，甚至支 付平台的交易流水，都能直接比对，曾经的"模糊地带"，正一点点被照亮。 卖家们最担心的是：是不是只要用了FBA，就一定要交税？答案并不简单，因为有《美中所得税协定》 这张"护身符"，只要没有形成"常设机构"（PE），大部分FBA卖家仍能豁免缴税。 文|昕昕 前言 美国"迫不及待"，卖家更要冷静 为什么美国现在盯得更紧？算一笔账就明白了，20 ...

Core Insights - Amazon is implementing significant changes to its FBA (Fulfillment by Amazon) shipment inbound rules starting June 12, 2025, which will strictly regulate the accuracy of weight and size declarations for shipments, directly impacting sellers' logistics cost structures [1][3][4] Group 1: Amazon's Policy Changes - The new policy aims to enhance the accuracy of domestic shipment weight and size inputs by Amazon's partner carriers, with notifications sent to sellers if discrepancies are found [3] - Discrepancies in declared measurements will lead to fee adjustments, with refunds for over-reported measurements and charges for under-reported ones [4] Group 2: Impact on Sellers' Costs - Sellers who historically underreported dimensions or weight will face direct additional fees, while compliance costs are expected to rise by 3%-5% due to the need for precise measurement tools and employee training [8] - Sellers who accurately report measurements may benefit from a long-term reduction in logistics costs by 2%-4% as the overall industry data is corrected [8] Group 3: Cost Optimization Opportunities - Utilizing third-party overseas warehouses can mitigate fluctuations in FBA shipping costs, with bulk shipping to these warehouses potentially reducing unit logistics costs by 20%-30% compared to direct FBA shipments [12] - Local fulfillment from overseas warehouses can significantly improve delivery times, reducing return rates by 12% and increasing repurchase rates by 8% [14] Group 4: Strategic Adaptation - The adjustment encourages sellers to transition from a reactive to a proactive approach in logistics, emphasizing the importance of accurate reporting and diversified logistics solutions [15] - The competitive landscape in cross-border logistics is shifting from a focus solely on cost to a combination of compliance, efficiency, and customer experience, with early adopters likely to gain a competitive edge [15]