How does online arbitrage work in the UK?

Online arbitrage (OA) is retail arbitrage done from your laptop. Instead of walking shops, you watch retailer websites for products priced below what they sell for on Amazon. It scales better than shop visits because you can check far more products, but you are also competing with every other seller watching the same sites.

How it works step by step

(1) Spot a product on a UK retailer site priced below its Amazon price. (2) Check its sales rank, price history, fees and the Buy Box, and confirm you are allowed to sell it. (3) Work out profit after the purchase price, delivery, Amazon fees and VAT. (4) Order it to your address or a prep centre. (5) Prep and ship it to FBA. (6) Reprice sensibly as it sells.

Why speed matters in OA

Online deals are visible to many sellers at once, so good ones can disappear in hours as stock sells out or Amazon prices fall. Fast alerts are most of the edge. The Inner Circle FBA runs 24/7 bot monitors across 30+ UK retailers for this reason, with people checking the leads before they are posted.

Risks to understand first

Restricted brands and categories can stop you listing after you have already bought. Prices can fall between your order and your stock arriving. Retailers sometimes cancel orders or limit quantities. Start with small quantities until you know how a product behaves, and keep your cost of goods records accurate for VAT.

OA, RA, A2A and wholesale

Retail arbitrage buys in physical shops. Amazon-to-Amazon (A2A) flips items bought on Amazon itself. Wholesale buys from suppliers at scale and is more repeatable once you are established. Many UK sellers start with OA for the low capital, then add wholesale. Our A2A versus OA and wholesale guides compare them.

How to start

Set up your seller account and VAT position, pick a small number of low-cost ungated products, and run one small batch end to end. The startup cost and step-by-step answers set out what that really takes. Joining the free tier first lets you see how leads are presented before you pay for anything.