The 3 parties

  1. The retailer — where you buy something.
  2. The cashback site — TopCashback, Quidco, JamDoughnut, etc.
  3. You — the buyer.

How the money flows

  1. You click a link on the cashback site.
  2. The link goes through the cashback site's tracking server, which sets a cookie identifying you as "referred by" them.
  3. You land on the retailer's site and buy something.
  4. The retailer pays the cashback site a commission (typically 3–15% of the sale).
  5. The cashback site passes most of that commission back to you — usually 50–90% of what they received.

So when you see "8% cashback" on TopCashback, the retailer probably paid TopCashback around 10–12%, and TopCashback kept 2–4% for itself.

Why payments are "pending" for weeks

The commission doesn't reach the cashback site the moment you buy. Retailers wait for the return window to close (often 30–90 days) before confirming the sale. That way they don't pay commission on items that get returned.

Only after the retailer confirms does the cashback site credit your account and make it withdrawable. So a purchase made today often becomes withdrawable in 2–3 months.

"Pending" isn't a problem — it's the system working Sites that promise "instant cashback" are usually working with a much smaller retailer list, or paying you a fraction of what they receive. Instant isn't better; it's a different trade-off.

Why some cashback never arrives

Common failure reasons:

  • Ad blockers or tracking blockers — kill the tracking cookie. The retailer never learns you came from the cashback site.
  • Clicked through to the retailer from another site first — the last click usually wins. If you searched Google, clicked an ad, then used TopCashback, the ad may override.
  • Used a discount code from elsewhere — retailers often void commission if you use a code they didn't supply.
  • Paid with a card that triggers "this is a subscription" logic — rare, but happens on some retailers.
  • Just forgot to click through — the most common cause. Install the browser extension and it'll remind you.

When cashback is missing, most sites let you raise a "missing cashback claim" within 30–90 days of purchase.

How the sites make money

Cashback sites earn from the difference between what the retailer pays them and what they pay you. This is usually 10–50% of the commission. It's not a hidden fee — it's the business model.

Some also earn from:

  • Ad placements — "featured retailer" slots on the homepage
  • Subscription tiers — a few sites have premium memberships with higher rates
  • Interest on pending balances — while your cashback sits pending, the site holds the money
  • Annual fees — Quidco takes the first £5/year of what you earn

Why some sites can offer "no minimum" and others can't

TopCashback allows withdrawal of any amount because they handle the payments themselves and pay to a bank account or PayPal (both cheap). Sites with £10–£20 minimums often pay via BACS transfer, where a small transaction has a real cost.

When you see a high minimum, it usually means the site is protecting itself against the cost of small payments, not trying to keep your money.

What this means for you

  • Click through every time. Cashback doesn't apply retroactively.
  • Turn off ad blockers on shopping sites. Or whitelist the cashback site and the retailer.
  • Be patient. 30–90 days pending is normal.
  • Check rates before buying. Same retailer, different rate, different site.
  • Use one or two sites consistently. Splitting between 5 sites means you forget which one has the best rate.

The honest summary

Cashback is a rebate on spending you were already going to do. It's not income — it's a discount. Treat it that way and it's genuinely free money. Treat it as a way to "make money" and you'll end up buying things you didn't need.

The mechanics matter because understanding them explains why so much cashback goes missing. Once you know the cookie needs to be intact and the return window needs to close, the process stops feeling arbitrary.