What does cashback actually mean?

Cashback means getting a percentage of what you spend paid back to you after the purchase, rather than a discount taken off at checkout. It can come from a credit or debit card, a cashback website, or a cashback card such as tuck., but the basic idea stays the same: you pay full price, then get some of it back.

Is cashback free money?

Not exactly, since you still have to spend money to earn it. But if it is spending you were already planning to do, cashback is a genuine way to get some of that money back rather than none of it. The key is only using it on purchases you were making anyway.

Is cashback the same as a discount code?

No. A discount code reduces the price at checkout, while cashback is paid back on top of the full amount you spend. With a tuck. cashback card, for example, you buy the card at full face value and tuck. pays your cashback as soon as that purchase is confirmed, you do not need to wait until you spend the card at the retailer.

Can I use cashback alongside loyalty cards like Clubcard or Nectar?

Yes. Cashback cards and retailer loyalty schemes work independently of each other, so you can usually collect loyalty points and earn cashback on the same shop. See How to stack cashback apps and earn more for more ways to combine them.

What is cashback and how does it work? A UK beginner's guide

By The tuck. team · Published 2026-07-31 · Last updated 2026-09-11

New to cashback? Learn exactly how it works, how tuck. pays you after you spend, and how to start earning on everyday UK shopping today.

If you have ever wondered what is cashback and how does it work, the short answer is this: it is money paid back to you after you spend, rather than a discount taken off at the till. It sounds simple, and it is, but there are a few different ways to actually get it. This guide breaks down how cashback works in the UK, the different types you will come across, and how tuck. specifically pays you back on everyday shopping.

What is cashback, exactly?

Cashback is a reward for spending money you were already going to spend. Instead of a retailer or provider giving you money off at checkout, they give you a percentage of what you paid back afterwards, once the purchase has gone through.

That distinction matters. A discount lowers the price there and then. Cashback does not touch the price at all, it simply hands some of your money back once the transaction is complete.

Where cashback actually comes from

Cashback is not the retailer being generous out of nowhere. Retailers pay a small commission to cashback providers, credit card companies, or cashback apps for sending them paying customers or for processing the payment. A slice of that commission gets passed on to you as cashback, so it costs the retailer very little and costs you nothing beyond the purchase you were making anyway.

How does cashback actually work?

There are three common ways to earn cashback in the UK, and it helps to know how each one actually pays out before you rely on it.

Cashback credit and debit cards

Some banks and credit card providers build cashback straight into the card. You spend as normal, and a percentage of eligible purchases is credited back to your account, usually monthly or annually. The rate is often lower on debit cards than credit cards, and many providers cap how much you can earn each month.

Cashback websites and browser extensions

These work by tracking a purchase you make after clicking through their link, then crediting your account once the retailer confirms the sale. Payouts can take anywhere from a few days to several weeks, since the provider is waiting on confirmation from the retailer first.

Cashback cards, like tuck.

A cashback card works differently to a discount voucher or a gift card top-up scheme. With tuck., you buy a cashback card for a specific retailer at its full face value, and tuck. pays your cashback as soon as that purchase goes through, not after you have spent the card. You then spend it at the retailer exactly as you would a gift card. There is no reduced upfront price and nothing to top up, once a card is spent you simply buy a new one for your next shop.

How tuck. cashback cards work, step by step

Here is exactly what happens from download to payout.

1. Download tuck. and sign up. Creating an account takes a couple of minutes and is free.

2. Choose a retailer. Browse over 200 partner retailers, from supermarkets to fashion and days out.

3. Buy a cashback card at full value. You pay the full face value of the card, there is no discount at this stage.

4. Get your cashback straight away. tuck. pays your cashback into your account as soon as the card purchase is confirmed, you do not need to wait until you spend it.

5. Spend it like a gift card. Use the card itself online or in-store at the retailer, whenever suits you, depending on how that brand supports redemption.

Cashback rates vary by retailer and are shown in the app as up to a certain percentage, so it is always worth checking the live rate for a brand before you buy.

Cashback vs discount codes vs loyalty schemes: what is the difference?

These three get mixed up a lot, but they work in genuinely different ways.

	When you save	How it pays out	Example
Discount code	At checkout	Price is reduced immediately	10% off code at checkout
Loyalty scheme	Over time	Points collected, redeemed later	Tesco Clubcard, Nectar
Cashback card	When you buy the card	Cashback is paid as soon as you purchase the card, before you have spent it	A tuck. cashback card

The good news is these are not rivals. Loyalty schemes like Tesco Clubcard vs cashback apps can usually be used on the exact same shop as a cashback card, since one collects points at the till and the other pays cashback afterwards.

Is cashback actually worth it?

Cashback is worth it when it is applied to spending you would be doing regardless, groceries, days out, clothes you already needed. It stops being worth it if it tempts you to spend more than planned purely to chase a percentage back.

Will using cashback make me spend more?

It can, if you let the cashback rate influence the size of your basket. The simplest way to avoid this is to decide what you are buying first, then check whether cashback is available on it, rather than the other way round.

Is it safe to use cashback apps and cards?

It is generally safe with reputable UK providers, though it is always worth checking how any provider handles your money and data before signing up. We cover this in more detail in our blog Are cashback apps safe.

How to start earning cashback today

If you already shop with any of the 200+ retailers on tuck., there is no real reason to leave cashback on the table. A good starting point is to check your next planned purchase, whether that is a weekly supermarket shop or a one-off treat, and see if cashback is available before you buy.

For a full breakdown of where cashback tends to add up fastest, see Which supermarket saves you the most money, or browse the full list of tuck. retailers partners to find your regular shops.