Canadian company vs US company for Amazon seller account? What are the actual benefits of a US‑registered account?

Bottom line: if you're already selling fine from Canada, don't expect a US account to magically boost your sales. The juice isn't worth the squeeze unless you need restricted categories or want to simplify logistics. I'd say focus on product and ads first. The grass isn't always greener.

One more thing – Vendor Central (VC) is easier to get with a US account. VC lets you run continuous Best Deals with lower ad spend. But Amazon controls the pricing – you become a supplier, not a retailer. It works well if you have a strong product and can handle wholesale margins.
Other platforms where a US entity helps:

• Walmart – They prefer US‑registered businesses.
• TikTok Shop US – Requires US entity for most sellers.
• Shopify – Not required, but US payment gateways (Stripe, etc.) are easier to set up.

To add to that – for dietary supplements specifically, you need an FSVP importer (a US‑based company responsible for FDA compliance) and an EIN (Employer Identification Number). Without a US entity, you'd have to hire a US agent. So if you're in that space, a US account is almost mandatory.
For logistics, you don't have to use a US warehouse, but it's way easier. Shipping from Canada adds cost and time. If you can afford it, use a third‑party logistics (3PL) warehouse in the US. Amazon will pull inventory from there. You can also ship directly to FBA from Canada, but you'll need a freight forwarder to handle customs clearance and duties.
For bookkeeping, get a US accountant. Don't try to DIY cross‑border taxes – it gets messy.

Honestly, a US‑registered account doesn't get any special traffic boost. I've seen plenty of Canadian and Chinese sellers rank just fine. The idea that Amazon favors local accounts is mostly a myth.
The real advantages are:

• Account stability – US accounts seem to get suspended less often for random compliance issues.
• Restricted categories – Some categories are only open to US sellers. For example:
• Pesticides, insecticides, herbicides
• Medical devices (some require extra approval)
• Jewelry (certain sub‑categories)
• Dietary supplements (FDA compliance is easier with a US entity)
• E‑cigarettes and vaping products
• Firearms accessories (scopes, holsters, etc.)
• Baby strollers and car seats
• Certain knives and blades
• Avoiding cross‑border headaches – No need to deal with duties, customs delays, or Canadian tax filings for US sales.

So unless you want to sell in those restricted categories, a Canadian account is fine. You're not missing out on traffic.