HS Codes in Canada: How Classification Really Works加拿大HS编码：分类的真正逻辑

Every product that enters Canada is declared under a 10-digit tariff classification number. That one number decides your duty rate, whether anti-dumping measures apply, whether another agency needs to approve your goods, and what the trade statistics say you imported. It is the single highest-leverage data point on your customs entry.每件进入加拿大的商品都按一个10位关税分类编号申报。这一个号码决定您的关税税率、是否适用反倾销措施、是否需要其他机构批准，以及贸易统计如何记录您的进口。它是报关单上杠杆最大的单一数据点。

Anatomy of a Canadian tariff number加拿大关税编号的结构

This is why your Chinese supplier's HS code is only a starting point: the first six digits usually carry over, but the last four digits are Canadian — and that's where the duty rate lives.这就是为什么中国供应商的HS编码只是起点：前六位通常通用，但后四位是加拿大特有的——而税率正是由后四位决定。

What the number controls这个号码控制什么

• Duty rate — MFN rate by default; preferential rates (CUSMA, CPTPP…) if your goods qualify and you have proof of origin关税税率——默认最惠国税率；符合条件且有原产地证明时适用优惠税率（CUSMA、CPTPP等）
• SIMA exposure — anti-dumping and countervailing measures are defined by classification + origin; steel is the densest territorySIMA风险——反倾销和反补贴措施由分类+原产地界定；钢材是最密集的领域
• Surtaxes — e.g. the current measures on certain Chinese-origin goods key off classification附加税——例如现行对部分中国产商品的措施以分类为依据
• Other government departments — food, plants, health products and more trigger permit requirements by code其他政府部门——食品、植物、健康产品等按编码触发许可要求

How classification decisions are actually made分类决定究竟如何做出

Classification follows the tariff's legal interpretation rules — headings and legal notes first, not marketing names or keyword searches. "Smart watch" isn't a classification; the legal questions are what it's made of, what it does, and which function is principal. For borderline products, CBSA offers binding advance rulings — worth it for high-volume SKUs because they remove reassessment risk.分类遵循税则的法定归类规则——先看品目和法定注释，而不是营销名称或关键词搜索。"智能手表"不是分类；法律问题是它由什么构成、有什么功能、哪个功能为主。对边界模糊的产品，CBSA提供有约束力的预裁定——对大批量SKU值得申请，因为它消除追溯重估风险。

The classic mistakes经典错误

• Copying the supplier's full 10-digit export code into the Canadian entry把供应商的10位出口编码原样抄进加拿大报关单
• Classifying to the lowest duty rate and working backwards to justify it先挑最低税率再倒推理由
• Declaring "parts" when the tariff treats the item as a finished article (or vice versa)税则视为成品时却申报"零件"（或相反）
• Never revisiting codes after a product or tariff change — reassessments reach back years产品或税则变化后从不复核编码——追溯重估可回溯数年

Useful official tools: the CBSA's Customs Tariff schedule and the free Canada Tariff Finder for FTA rates. And classification review is built into our 8-step compliance process — every line item, every entry.实用官方工具：CBSA关税税则表和免费的加拿大关税查询器（自贸协定税率）。分类审核内置于我们的8步合规流程——每个税项、每票申报。