Cashback portals explained: how they work and how stacking adds up
Shopping portals pay you part of the commission a store pays them. Used correctly, they can add a few percent back on purchases you were already making.
This article may contain affiliate links. If you buy through them, we may earn a commission at no extra cost to you. How this works
A cashback or shopping portal is essentially an online mall. You start on the portal's website, click through to a store, and buy as usual. Because you arrived through the portal's link, the store pays the portal a referral commission, and the portal passes part of it back to you as cash, points or miles.
This is the same affiliate model that many publishers use, including this site. The difference is that a portal shares the commission with the shopper directly.
Why the click order matters
Portals rely on a tracking cookie in your browser to prove the sale came through them. If the cookie does not register, the portal cannot claim the commission and you do not get paid. Experienced users recommend:
- Always start from the portal, not from a saved store bookmark.
- Pause ad blockers or strict privacy settings for that session if purchases do not track.
- Clearing old cookies before an important purchase can help the right link register.
- Keep your order confirmation until the reward appears in your portal account.
Stacking rewards
Portal rewards come on top of whatever your payment card already earns. NerdWallet illustrates it simply: if your card gives 2% back on everything and the portal offers 2% at that store, the purchase earns 4% in total.
Rates for the same store can differ widely between portals and change frequently. Comparison sites such as Cashback Monitor collect current rates from many portals in one table, which saves checking each one individually.
Things to watch
- The currency differs. Some portals pay cash, others pay airline miles, hotel points or gift cards, and these are not worth the same.
- Rewards take time. Most portals hold rewards until the store's return window has passed.
- A discount is only a saving if you needed the item. Cashback should not be the reason for a purchase.