Amazon FBA Fees UK Guide: Referral, Fulfilment, VAT, and Margin
Most FBA mistakes come from treating referral fee as the whole cost structure. It is not.
The Amazon FBA calculator UK is the quickest way to model profitability, but the number only makes sense if you understand the fee layers underneath it.
Referral fee is only the first cut
Sellers often know the category percentage and stop there. Real margin depends on fulfilment, storage, prep, inbound shipping, and seller plan costs as well.
VAT can distort the picture
For non-VAT-registered sellers, VAT charged on Amazon fees can make an already-thin margin even weaker. That is why VAT treatment needs to be part of the model.
Use break-even logic before you source
Change the sale price, product cost, and size tier inputs before you commit to inventory. A small change in fulfilment fee or storage duration can decide whether a SKU is worth launching.