How Do Cashback Sites Work UK — Quidco, TopCashback Explained

Cashback sites pay UK shoppers real money on purchases they would make anyway. Here is exactly how they work and how to use them effectively.

How Cashback Sites Work — The Mechanics

1. You visit a cashback site (TopCashback, Quidco)
2. Search for the retailer you want to shop with
3. Click through to the retailer via the cashback site’s tracking link
4. Complete your purchase on the retailer’s site (normally)
5. The cashback site tracks the sale (Quidco says it uses cookies)
6. The retailer pays the cashback site a commission
7. The cashback site credits your account with your cashback

The cashback is paid out of the commission the retailer gives the cashback site. TopCashback says it is free to join.

Cashback Rates: What to Expect

Rates vary and change frequently. Always check the current rate on the cashback site before purchasing.

Key Rules for Reliable Cashback

Do:

• Make sure your browser allows cookies and pop-ups, and avoid using a VPN while you shop
• Complete the purchase in a single session, staying on the retailer’s website
• Clear your browser cookies before clicking from the cashback site
• Start from the cashback site every time, even for retailers you’ve used before

Don’t:

• Use a voucher code that the cashback site did not provide (it can interfere with tracking)
• Switch between browser tabs or leave the retailer’s site to compare prices mid-purchase

Withdrawing Cashback

Quidco’s withdrawal options are bank transfer (BACS), PayPal and retailer gift cards, with a minimum withdrawal of £1 for bank transfers and PayPal. TopCashback offers PayPal payouts, and some retailers allow withdrawal by bank transfer only.

Quidco says the whole process, from purchase to cashback in your wallet, can take 3 to 6 months, or longer if the retailer has not paid the funds. TopCashback says cashback should show on your Earnings page within 7 days, but it waits until the retailer’s returns period is over before confirming it, and makes it payable once the retailer has paid the commission.

Safety Considerations

• Never share your payment card details with the cashback site — all transactions happen on the retailer’s own secure checkout
• Use strong unique passwords for your cashback account (these accounts hold real money)
• Enable two-factor authentication if available

For a direct comparison of the two main sites, see Quidco vs TopCashback UK. For money-saving apps more broadly, see Best Money-Saving Apps UK.

In-Store and Grocery Cashback

Standard cashback sites (TopCashback, Quidco) are primarily for online purchases. But there are cashback options specifically designed for physical in-store grocery shopping:

Shopmium and Checkoutsmart work differently from online cashback:

1. Browse the app for current offers (usually specific branded products)
2. Buy the product in any participating supermarket
3. Scan the product barcode in the app (or photograph the receipt)
4. Cashback is credited to your account once the offer’s conditions are met

These are limited to specific products, typically branded goods, and the cashback per item depends on the offer. Check each offer’s terms to see whether it can be used alongside loyalty card discounts and member prices on the same shop.

Too Good To Go and OLIO are not cashback sites: they are food surplus platforms.

How to Maximise Your Cashback Returns

Stack when you can:

• Use a cashback site to buy insurance online → earn cashback
• Pay with a cashback credit card → earn card cashback
• Check the terms of each to see whether both apply to the same purchase

Prioritise high-value categories: Switching transactions (energy, broadband, insurance, financial products) usually pay a fixed amount rather than a percentage. Check the current amount on the site, because it can be more or less than a small grocery purchase would earn.

Set a cashback reminder: Before any significant online purchase or switching transaction, check the cashback sites for a rate first.

Use the browser extension: Both TopCashback and Quidco offer browser extensions that alert you when you’re on a site that has cashback available. This passive reminder catches purchases you might not have thought to check.

What Happens If Cashback Goes Missing

Quidco says cashback can fail to track for reasons such as offer details, order changes, leaving the retailer’s site, browser settings, a VPN, voucher codes and referrer recognition. If you expected cashback and it does not appear:

1. Check the status in your account. Quidco says retailer approval can take anywhere from a few days to a few months
2. Check the retailer’s offer terms and the site’s help pages for how to raise a claim
3. Keep evidence: date of purchase, order confirmation number and amount spent

Quidco says it can never guarantee cashback, but that if you follow the terms and conditions of the offer you should have no problems.

See also: Quidco vs TopCashback UK and Best Money-Saving Apps UK.

For budgeting and expense tracking tools, see Best Money Apps UK.

Related Guide

• Supermarket Savings UK 2026: Loyalty Cards, Cheapest Supermarkets and How to Cut Your Food Bill