Store cards are offered at the tills of many retailers, usually with an instant discount on today's purchase as the hook. They can look like an ordinary credit card, but the terms are often quite different — and understanding those differences is the difference between a genuinely good deal and an expensive mistake.
What a store card actually is
A store card is a line of credit, provided by a bank or finance company on behalf of a retailer, that can usually only be used at that retailer (or a small group of related brands) rather than anywhere that accepts Visa or Mastercard. Like a credit card, you borrow money to make a purchase and repay it later, and interest is charged on any balance you don't clear in full.
How store cards differ from ordinary credit cards
| Feature | Typical store card | Typical credit card |
|---|---|---|
| Where it can be used | One retailer or brand group | Anywhere the card network is accepted |
| Representative APR | Often noticeably higher | Wide range, often lower for good credit scores |
| Sign-up incentive | Often an instant one-off discount | Sometimes cashback, points, or a 0% period |
| Section 75 protection | Usually applies in the same way as a credit card, for qualifying purchases | Applies to qualifying purchases |
Why the interest rate matters more than the discount
The sign-up discount is usually a fixed percentage off one transaction. The interest rate applies to any balance you carry going forward, for as long as you carry it. If you clear the balance in full before interest is charged, the discount is close to free money. If you don't, the higher interest rate on a store card can wipe out the value of the discount within a few months and keep costing you after that.
Worked example
Say you spend £200 and get a 10% discount for signing up, so you pay £180. If you clear that £180 before the interest-free period ends, you've genuinely saved £20. But if you only pay the minimum each month and the card charges a high APR typical of store cards, the interest on the remaining balance can add up to more than the £20 discount within the first year — and it keeps accruing every month after that.
When a store card can make sense
- You shop at that retailer regularly and always pay the balance off in full each month.
- The discount is large enough, and the purchase was one you were making anyway, rather than one prompted by the offer.
- You want to build a credit history and can manage the card responsibly with a low balance.
When to think twice
- You're being asked to sign up at the till, under time pressure, for a purchase you hadn't planned.
- You tend to carry a balance on other cards, which suggests you might do the same here.
- You already have several open credit accounts — each application leaves a mark on your credit file and can affect your ability to get other credit shortly afterwards.
Common misconceptions
A common mistake is assuming the discount applies to the interest rate too — it doesn't; the two are unrelated. Another is assuming a store card is "less serious" than a credit card because it's tied to a shop. In credit file terms, it's treated the same as any other revolving credit account, and missed payments or a high balance relative to your limit can affect your credit score just as much.
What to do next
Before signing up, check the representative APR printed on the in-store leaflet or application screen, and be honest with yourself about whether you'll clear the balance before interest applies. If you're not confident you will, take the discount conversation as a prompt to compare against a standard 0% purchase credit card instead, which may offer a longer interest-free window and wider usability.