How Cashback Works, and How to Get Money Back on What You Buy
If you're asking, “What is cashback, and why do companies pay it?”, the short answer is that cashback gives you some money back after an eligible purchase. Depending on the service, you might earn it by visiting a retailer through a tracked link, buying a digital gift card, using a linked payment card or claiming an offer after a supermarket shop. It can reduce the cost of spending you already intended to make, but it should never be the reason you buy something you don't need.
The method matters because each type of cashback follows different rules. A gift card reward may appear as soon as the gift card is purchased, while cashback from an online purchase can remain pending until the retailer has checked the order and confirmed it qualifies. This guide explains those differences, the catches to check and where to find my detailed comparisons and app reviews.
How does cashback work?
Cashback companies usually receive a commercial payment when they generate an eligible sale for a retailer, and some or all of that value is passed back to you. With a traditional cashback website, a tracked link and browser cookies connect your visit to the eventual purchase; the retailer then checks whether the transaction meets its offer conditions. A returned order, an excluded product, an unapproved discount code or another tracking source can prevent the cashback from becoming payable.
Other services use a different model. Gift-card apps reward you when you buy a retailer's digital gift card, card-linked services recognise qualifying spending made with a registered card, and supermarket cashback apps pay against selected products after you submit the required purchase evidence. Once you understand what cashback is in each setting, it becomes much easier to choose the right method and recognise which conditions could affect the reward.
Choose the cashback help you need
You don't need to use every cashback service or understand every method before getting started. Choose the route that matches the purchase you're planning, then use the linked guide for the fuller comparison, instructions and individual terms. These six starting points cover the main questions people bring to this section.
Compare cashback apps and sites.
Compare the main UK cashback services and see which types of spending they suit. I explain which ones I use and where their earning methods differ. The full guide also covers the restrictions to check before joining or buying.
Compare cashback services
Read individual cashback app reviews.
Find my tested reviews of cashback websites, gift-card apps and linked-card services. Each review explains how the service works and where I've encountered limitations. You can use the reviews to research an app before opening an account or connecting any financial information.
Understand gift-card cashback
Learn how apps like JamDoughnut reward you for buying a digital gift card before shopping at the retailer. My review explains how I use it for groceries and high-street spending. It also covers the restrictions to check before putting money onto a gift card.
Save on supermarket products.
Find apps that offer money back on selected grocery products. You normally buy the qualifying item first, then submit the required receipt or evidence of the online order. The comparison explains which conditions can cause a claim to fail.
Compare supermarket cashback apps.
Earn rewards from receipts.
See which apps accept eligible shopping receipts in return for points, prize entries, vouchers or other rewards. These aren't the same as product-specific supermarket cashback offers. The guide compares the likely return with the information and effort each service requires.
Compare receipt scanning apps.
Find the latest JamDoughnut code.
Check the current Penny Pincher referral code and joining reward before signing up. The page explains what you need to do to qualify for the reward. It is also where I update the offer when the code, bonus or conditions change.
View the JamDoughnut referral code.
What are the different types of cashback and rewards?
Cashback and rewards can reduce what you pay, return money after a purchase or give you something to use later, but the methods work in different ways. Each one has its own conditions, payment times and possible restrictions. Check the current details before spending, because rates, retailers and eligibility rules can change.
Tracked cashback
With tracked cashback, you visit a retailer through a cashback website or app before completing your purchase. The cashback service records the visit and may receive a commercial payment if the retailer accepts the transaction. Check the tracking requirements, excluded products, approved voucher codes and expected payment time before buying.
Gift-card cashback
Gift-card cashback works by rewarding you when you buy a digital gift card that can be used at a specific retailer. You receive the applicable reward through the cashback service, then use the gift card online or in a shop that accepts it. Check where the gift card can be used, whether it expires, what happens to unused balances and how refunds will be handled.
Card-linked cashback
Card-linked cashback recognises eligible spending made using a payment card registered with the cashback service. Some offers work automatically once your card has been connected, while others need to be activated before you spend. Check the participating retailers, qualifying payment methods, reward caps and any deadline attached to the offer.
Supermarket cashback
Supermarket cashback apps offer money back on selected grocery products rather than paying a percentage across your whole shop. You usually buy the exact qualifying product and submit the requested receipt or evidence of the online order through the app. Check the product size, flavour, accepted retailer and claim deadline, and only buy the item when it genuinely fits your shopping needs.
Receipt rewards
Receipt reward apps let you upload eligible shopping receipts in exchange for points, prize entries, vouchers, or other rewards. They differ from supermarket cashback apps because the reward may be based on the receipt itself rather than a refund for a single named product. Check which receipts are accepted, what the rewards are worth, when you can redeem them and what shopping information the app collects.
Loyalty rewards
Retailer loyalty schemes can provide members with prices, points, vouchers, personalised offers, or credit towards future shopping. These rewards usually remain inside the retailer’s scheme rather than being withdrawn as ordinary cash. Compare the member price with competing retailers, and check when accumulated points, vouchers or account credit expire.
Gift-card cashback
Gift-card cashback rewards you for buying a retailer's digital gift card before you shop. Apps including JamDoughnut, Gains, Cheddar and Everup use versions of this model, although their rates, funding methods and withdrawal conditions differ. The cashback is linked to the gift-card purchase rather than waiting for the retailer to approve a separate shopping transaction.
I usually buy a gift card as close as possible to the amount I'm about to spend, rather than leaving a large balance tied to one retailer. Before paying, check whether the gift card works online, in a shop, or both, and review how the retailer handles refunds and unused credit. A higher cashback rate isn't much use if the payment method doesn't work where you need it or leaves money sitting on a card you forget to use.
Card-linked cashback and bank rewards
Card-linked cashback recognises an eligible purchase made with a payment card you've registered with the service. Airtime is the card-linked service I use most, with eligible rewards applied to a supported mobile phone bill rather than withdrawn as cash. Banks and payment-card providers can also run their own cashback offers. Still, you need to check activation requirements, participating retailers, fees, caps and expiry dates before counting the advertised reward.
Supermarket cashback apps
Supermarket cashback apps focus on selected products rather than paying a general percentage across your whole food shop. You find an offer, buy the exact qualifying product from an accepted retailer and submit the receipt or online order evidence requested by the app. My supermarket cashback apps guide compares the services and explains why a heavily promoted offer is only a saving when it replaces something you intended to buy.
These offers can sometimes return the full purchase price, but that doesn't automatically make the product useful or the shopping trip worthwhile. Check the size, flavour, retailer and claim deadline before paying, then keep the receipt until the claim has been accepted. Buying an unwanted item to earn cashback still leaves you with less money than you had before the purchase.
Receipt scanning and reward apps
Receipt reward apps usually accept a wider range of eligible receipts and provide points, prize entries, vouchers, or other rewards rather than refunding a specific grocery product. That makes them different from supermarket cashback apps, even though both may ask you to photograph a receipt. My guide to receipt scanning apps explains which receipts are accepted, what the rewards are worth and whether the effort makes sense.
An itemised receipt normally provides an app with more useful information than a small card payment slip. Read the privacy information and the reward rules, as your shopping data may be part of the value the service receives. Keep the original receipt until it has been processed, particularly if you might need it for a return.
Loyalty schemes and points
Retailer loyalty schemes fall under the rewards side of this section, but points and vouchers aren't always equivalent to cash. Tesco Clubcard, Nectar, Morrisons More, Asda Rewards and Lidl Plus all use different combinations of member prices, points, personalised offers or account credit. A reward can help with a future shop, but compare the actual selling price rather than assuming a loyalty price beats every competing retailer.
I treat loyalty rewards the same way as cashback: they come after deciding what I need and where it costs the least. A points target or personalised offer can encourage extra spending, particularly when the final reward is smaller than the additional purchase. My wider guide to saving money on food shopping explains how loyalty schemes fit alongside meal planning, price comparisons and other supermarket savings.
Which type of cashback should you use?
The right cashback method depends on what you're buying and how you're paying. For a planned online purchase, I normally compare tracked services first because the retailer or product category may carry a worthwhile payment. For an in-store supermarket or high-street purchase, gift-card cashback or a card-linked offer may be more relevant because a traditional tracked link might not cover the transaction.
Supermarket cashback apps work best when one of their qualifying products already fits your shopping list, while receipt reward apps can sometimes return a smaller benefit after the purchase. Loyalty schemes are useful when you already shop with the retailer, but their points, vouchers and member prices shouldn't stop you from comparing the total elsewhere. No single app covers every purchase, which is why I keep several services available without feeling obliged to use them all every time.
Once you've established what cashback is available, compare the reward against the effort and restrictions involved. An extra 10p may not justify opening another account, while a larger tracked payment could justify spending a few minutes checking the conditions and keeping the order details. The decision should be based on the amount you're likely to receive, the risk of it not being paid and whether you'd still purchase without it.
Where should you start with cashback?
Start with one purchase you already intend to make rather than downloading several apps and looking for reasons to use them. Compare the retailer's price, delivery charge and any available discount first, then see whether cashback can lower the final cost. This order protects the savings because a higher starting price can offset an otherwise attractive cashback percentage.
For online shopping, begin with a cashback service comparison and choose a service suited to the retailer or purchase. If most of your spending happens in supermarkets or on the high street, read the gift-card and card-linked sections first. Keep the first transaction small while you learn how the service records cashback, displays the reward and handles withdrawals.
Why do I use JamDoughnut for gift-card cashback?
JamDoughnut is the gift-card cashback app I use most often for groceries, eating out and other planned spending with supported retailers. I usually wait until I know the amount I'm about to pay, then buy a digital gift card close to that amount and present it at the till or at the online checkout. The cashback appears in the app when the gift card purchase is completed, eliminating the retailer-validation wait associated with traditional tracked cashback.
The method still requires a little care because each retailer sets its own gift card rules. I check where the card can be used, avoid buying more credit than I need and compare the live cashback rate with other services before paying. My full JamDoughnut review covers how I use the app, the limitations I've encountered and the questions to ask before buying a gift card.
The Penny Pincher currently has a commercial relationship with JamDoughnut, and this is disclosed because it could reasonably matter to your view of the recommendation. My comments are based on my own use of the app, and I still compare its rates and restrictions with alternatives before making a purchase. If you want to try it, my JamDoughnut referral code page includes the current Penny Pincher code, along with the joining reward and qualifying conditions.
Can you combine cashback offers?
You can sometimes combine different types of cashback and rewards, but no combination should be treated as guaranteed until you've checked every set of terms. A retailer's loyalty points may still be available when you pay with a gift card, or a card-linked offer may work alongside a separate retailer promotion. Tracked cashback services can exclude gift-card payments, unapproved voucher codes, and transactions credited to another marketing source, so that the same method won't work for every retailer.
If a large tracked payment is at stake, I won't risk it for a much smaller second reward unless the terms clearly allow the payment method and promotion I want to use. Browser extensions can also compete for the same transaction, which may change which service receives the referral credit. Compare the possible savings from each route, choose the best-supported option, and take screenshots of any terms that materially affect the purchase.
How can you stop cashback being declined?
Cashback can't be made completely risk-free, but careful preparation reduces avoidable tracking problems. Read the retailer's terms and conditions before visiting its website, close any other retailer tabs, and avoid using a discount code that isn't approved by the cashback service. Traditional cashback websites use browser cookies to link your visit to the purchase, so blocking tracking or using another referral source can interfere with that connection.
Complete the purchase in one session where possible, keep the order confirmation and check that the transaction appears in your cashback account. If it doesn't track, follow the service's missing-cashback process within its stated time limit rather than leaving the claim until later. Don't count pending cashback as part of the money available for a purchase, because it may take time to clear or may never become payable.
Gift-card cashback avoids that particular tracking process, but it introduces different considerations. Check the retailer, amount, redemption route, and expiry conditions before buying, and keep a record of any remaining balance on the card. Refunds and cancelled orders may be handled under the retailer's gift-card rules, so read those conditions before using a large gift card for something you might need to return.
Are cashback apps safe to use?
Cashback is a legitimate commercial model, but that doesn't prove every website or app using the term is trustworthy. Check who operates the service, how long it has existed, what contact and complaints information it provides, and what access it wants from your phone or financial accounts. Traditional cashback websites don't normally need access to your bank account to track an online purchase, so question any permission that doesn't appear necessary for the feature you're using.
Some cashback and money-management apps use Open Banking to connect an account or authorise a payment. Open Banking uses regulated providers and sends you through your own bank's authentication process, so you shouldn't give the cashback app your bank password or PIN; its consumer security guidance explains the protections and permissions involved. If you're unsure about a named financial provider, the FCA Firm Checker can help you confirm whether it is authorised and has permission to provide the relevant service.
Make cashback the final check before you pay
Decide what you need, find the best overall price and only then look for cashback or rewards that can reduce it further. Keep records when the potential payment is substantial, withdraw available balances rather than forgetting them and review any unused gift cards sitting in your accounts. That approach turns cashback into a useful reduction on planned spending without letting the reward decide what you buy.
Cashback and rewards questions answered.
What is cashback in simple terms?
Cashback is money returned to you after an eligible purchase. The reward might come from a tracked shopping link, a digital gift card, a linked payment card or a product-specific offer. The conditions and payment time depend on the service and retailer involved.
How does cashback work on online shopping?
You open a cashback website or app, find the retailer and follow its tracked link before buying. Cookies or another tracking method link the visit to your order, and then the retailer checks whether the purchase qualifies. The cashback may remain pending until validation is complete.
Is cashback guaranteed?
No, tracked cashback isn't guaranteed simply because an amount appears when you click through. The retailer may decline it if the order is returned, excluded or attributed to another marketing source. Treat the reward as an extra, not as money you need to make the purchase affordable.
What are cashback gift cards?
Cashback gift cards are digital retailer gift cards that produce a reward when you buy them through a participating service. You then use the gift card to pay the retailer, subject to that retailer's redemption rules. Check where the card works, its expiry conditions and how refunds are handled before buying it.
How long does cashback take to become payable?
It depends on the method, retailer and purchase. Gift card cashback may appear when the gift card is purchased, while tracked cashback may take weeks or months because the retailer needs to validate the transaction. Check the service's estimate, but don't rely on the money arriving by a particular date.
Why hasn't my cashback tracked?
Tracking can be interrupted by blocked cookies, another browser extension, an earlier visit to the retailer, an unapproved voucher code, or a purchase made outside the required route. Read the offer conditions and submit a missing cashback claim by the service's deadline. Keep the order confirmation and any screenshots that support the claim.
Can you use two cashback apps on the same purchase?
Sometimes, but it depends on how each reward is recorded and what the retailer allows. A gift card, linked-card reward, or loyalty scheme may be combined with another offer, while a tracked service may specifically exclude that payment method. Check every set of terms rather than assuming a previous combination will continue to work.
Are cashback apps safe with your bank details?
Some cashback apps don't require your bank details, while others use Open Banking to connect to your accounts or process payments. Check which regulated provider handles the connection, what permission you're granting and how to remove access later. You should authenticate through your bank and never give the cashback app your banking password or PIN.