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Yup, customs base duty on your transaction value — basically what you actually paid your supplier — not the Amazon retail price. Here’s a quick example to make it clearer 👇
Example:
Let’s say you import 1,000 units at $5 each → $5,000 invoice value
Duty rate: 4%
Shipping + insurance: $800
If...
You only pay tariffs on what you paid your supplier — not the retail price.
Customs calculates duties based on the declared manufacturing cost (your invoice value), not your Amazon sale price.
I actually wrote a detailed breakdown about this on my blog — just Google the title “Save Thousands on...
Nah, customs won’t charge you on the £20k retail value. Duties are based on your invoice/manufacture cost, not what you hope to sell it for on Amazon.
So if your supplier invoice says the goods are worth £20k at cost, that’s what they’ll look at. Doesn’t matter if Amazon fees cut into your...