A credit card is a revolving credit account with a monthly statement. An overdraft lets a current account go below zero, usually with interest. Both are borrowing, not extra income.
The cost depends on APR, how much you use and how quickly you repay. Paying a card's full statement balance by the due date will usually preserve the purchase interest-free period; minimum payments usually will not.
The useful points
- APR helps compare yearly borrowing cost, but your actual interest depends on balance and time.
- The statement balance is what the issuer billed; the minimum is only the least required to avoid being marked missed.
- Keep well below the credit limit where possible: high utilisation can look risky to future lenders.
- Cash withdrawals commonly start charging interest immediately and may add a fee.
- A balance transfer can reduce interest, but check the transfer fee, promotional end date and purchase rules.
- For a UK credit-card purchase costing more than £100 and up to £30,000, Section 75 may make the card provider jointly liable even if only part was paid on the card.
Follow the statement cycle
A card has a statement date, statement balance and payment due date. New spending after the statement date normally belongs to the next bill, while the current statement still needs paying. Paying only the minimum keeps the account up to date but usually allows interest to compound and can remove the benefit of an interest-free purchase period.
- Read the statement rather than relying only on the app's current balance.
- Set a Direct Debit as protection, then make additional payments deliberately.
- Do not mix balance transfers, purchases and cash withdrawals without checking how each is charged.
Use credit as a payment tool, not an income substitute
Credit can provide purchase protection and short-term flexibility, but only when the repayment already fits the budget. Persistent overdraft use is a warning that normal spending exceeds normal income. Before increasing a limit, calculate how and when the balance will return to zero without relying on another loan.
- Compare the total cost and repayment date, not merely the minimum.
- Keep utilisation comfortably below the limit where practical.
- Pause new spending and contact the lender early if the balance is no longer reducing.
| Feature | Credit card | Overdraft |
|---|---|---|
| How it works | Separate account with a monthly statement | Borrowing through a current account |
| Interest-free use | Often possible on purchases if the full statement balance is paid | Usually interest starts while overdrawn |
| Best discipline | Pay the full statement balance | Set a plan to return the account above zero |
Why the minimum barely moves the balance
On £1,000 at 24.9% APR, one month's interest is roughly £20.75. If the minimum payment is £25, only about £4.25 reduces the balance that month (before any fees).
£1,000 × 24.9% ÷ 12 ≈ £20.75 interest; £25 − £20.75 ≈ £4.25 principal.What this means for you
Use the same steps with your own figures. Change one assumption at a time and check that essentials still fit before committing.
Common traps
- Paying only the minimum by habit
- Missing a due date and losing a promotional rate
- Using a credit card for cash
- Treating the limit as a target
A realistic action list
- Check the APR and statement date
- Set a Direct Debit
- Aim to clear the full statement balance
- Ask for help before payments are missed