An arranged overdraft can be convenient for a short cash shortfall, but a credit card may cost less, especially if you can repay purchases in full by the payment deadline. In the UK, overdraft interest generally starts when you borrow, whereas eligible credit card purchases can be interest-free. The cheaper option depends on what you are paying for, your actual interest rates, how long you borrow and whether you can meet the repayment terms.
Quick answer: Choose an interest-free credit card purchase when you can reliably clear the full statement balance. Consider an arranged overdraft for a brief current-account shortfall when its actual cost is low. For borrowing lasting several months, compare a 0% promotional card or a lower-cost repayment arrangement instead of repeatedly using an expensive overdraft.
UK consumer finance guide. Last reviewed: 12 October 2026. Rates used in examples are illustrative, not live lender quotations.
Decide in 30 seconds
- Buying something and paying in full? A credit card with an available interest-free purchase period will usually cost less in interest.
- Covering a direct debit before payday? An existing arranged overdraft may be simpler, but calculate its daily interest.
- Need cash? Compare an overdraft with a suitable money transfer option. Ordinary credit card cash withdrawals can be costly.
- Repaying over several months? Compare the total cost of a promotional card, overdraft and any affordable loan alternative.
What Is the Difference Between an Arranged Overdraft and a Credit Card?
An arranged overdraft is an agreed borrowing facility linked to your current account. If your account balance drops below zero, you can borrow within the agreed limit, subject to the bank's terms.
A credit card provides a separate credit limit. You use it for purchases and receive a monthly statement showing your outstanding balance, minimum payment and due date.
The fundamental difference is how interest applies.
With an arranged overdraft, interest generally accrues while you have an interest-bearing negative balance. With a credit card, qualifying purchases can avoid interest if you satisfy the conditions for the interest-free period, normally including paying the full statement balance by the due date.
According to MoneyHelper's explanation of overdrafts, these facilities are primarily suitable for emergencies or short-term borrowing rather than ongoing debt.
| Feature | Arranged overdraft | Credit card |
|---|---|---|
| Access | Current account | Separate credit facility |
| Interest | Generally accrues while overdrawn | May be avoided on eligible purchases |
| Repayment | Incoming money reduces the negative balance | Monthly minimum payment required |
| Cash access | Can fund current-account payments and withdrawals | Cash withdrawals often attract fees and immediate interest |
| Main risk | Persistent borrowing and a reducible or withdrawable limit | Revolving debt, missed payments and lost promotional rates |
How Arranged Overdraft Interest Works in the UK
Since April 2020, the Financial Conduct Authority (FCA) has required covered personal current-account overdrafts to use simplified interest-based pricing, with restrictions on fixed borrowing fees and unarranged overdraft pricing.
The FCA Handbook's overdraft pricing rules require a single annual interest-rate structure for an individual customer's chargeable arranged overdraft balance, subject to permitted interest-free amounts and other specified exceptions.
These rules do not mean every bank charges the same rate. Your rate can depend on the provider, account and your circumstances.
Interest normally depends on the daily balance
Suppose your current account is £500 overdrawn for 10 days. The cost depends on the interest rate and how your bank calculates and compounds interest.
For an approximate calculation using an effective annual overdraft rate:
Illustrative formula:
Cost = Balance × [(1 + annual effective rate)days ÷ 365 − 1]
Assumptions: A constant balance, a 365-day year, no interest-free buffer and daily effective compounding.
A bank's actual daily interest method, rounding and posting dates may produce a different result. Use its published overdraft-cost calculator for an account-specific quote.
Why overdraft limits are not long-term funding guarantees
An arranged overdraft can be flexible, but the lender may review, reduce or withdraw the facility in accordance with applicable terms and requirements.
That creates a practical risk: a borrower who depends on the full overdraft limit every month may have difficulty clearing the negative balance if the available facility changes.
MoneyHelper also cautions that habitual overdraft use can become expensive, even if each individual borrowing period initially seems short.
How Credit Card Interest Changes the Comparison
Credit card costs depend on the type of transaction and the repayment pattern. A card purchase, a cash withdrawal and a promotional money transfer may each have different charges.
Paying the full statement balance
With a standard interest-free purchase arrangement, paying the full statement balance by the due date normally means avoiding purchase interest, provided the card's relevant conditions are satisfied.
For example, a £500 qualifying purchase could cost £0 in interest if the full statement balance is paid on time and the account is eligible for the interest-free purchase period.
This advantage is explained in MoneyHelper's guide to credit cards, which also warns that carrying balances and withdrawing cash can be expensive.
Paying only the minimum
When you do not pay the full statement balance, standard purchase interest can apply under the card's terms. Paying only the minimum may substantially extend the repayment period and increase total interest.
The minimum payment is a contractual requirement, not a recommended strategy for clearing debt quickly.
Credit card cash withdrawals
Withdrawing cash using a standard credit card can trigger a cash transaction fee and interest from the transaction date, without the usual purchase grace period.
Therefore, a credit card with a lower advertised purchase APR is not necessarily cheaper than an arranged overdraft when you need actual cash.
Arranged Overdraft vs Credit Card: £500 Cost Comparison
To see how the two borrowing methods differ, consider a hypothetical borrower who needs £500.
Illustrative assumptions, not market averages or current offers:
- Borrowing amount: £500.
- Overdraft: 39.9% effective annual interest rate, with no interest-free allowance.
- Credit card: 24.9% annual borrowing rate, treated as a nominal annual rate for the interest estimate.
- Borrowed balance remains £500 throughout each period.
- No additional fees, repayments or balance changes within the comparison period.
- The card's interest-free purchase conditions are satisfied in the separate £0-interest scenario.
The approximate overdraft calculation applies the effective annual rate over the specified number of days. The interest-bearing card estimate uses a simplified daily rate of 24.9% ÷ 365. Actual card APR disclosures, compounding, billing cycles and payment allocation can change the result.
| Borrowing method | 14 days | 30 days |
|---|---|---|
| Arranged overdraft, 39.9% effective annual rate | £6.44 | £13.99 |
| Credit card, 24.9% nominal annual rate, interest charged | £4.78 | £10.23 |
| Eligible credit card purchase, full payment within interest-free conditions | £0.00 | £0.00 |
These are hypothetical equal-duration financing comparisons, not predictions of actual statement charges. The two illustrated annual rates use explicitly different rate conventions. The £0-interest purchase examples assume that the relevant payment due date and full-payment requirements are met.
What changes the decision?
If the £500 expense can be paid directly by credit card and you can satisfy the interest-free purchase requirements, the card has a clear interest-cost advantage.
If the expense is a direct debit or a payment that cannot be made by credit card, the comparison changes. You may need an overdraft or another form of bank-account funding.
If the borrower already carries a credit card balance, they must check whether new purchases still qualify for an interest-free period. A lower advertised rate does not guarantee cheaper borrowing.
The Break-Even Test: When Would a Transfer Fee Be Worth Paying?
Suppose you already owe £1,000 through an arranged overdraft and cannot clear it immediately.
You are considering a hypothetical 0% money transfer credit card with a 3% transfer fee. A money transfer card allows eligible funds to be transferred to a bank account, rather than merely moving a balance from one credit card to another.
Illustrative assumptions:
- Existing overdraft debt: £1,000.
- Overdraft rate: 39.9% effective annually.
- Money transfer fee: 3%, or £30.
- Promotional transfer interest: 0% for a sufficiently long qualifying period.
- No overdraft interest incurred while the transfer is processed.
- Transfer and fee repaid before the promotional rate ends.
At the assumed overdraft rate, £1,000 outstanding for 30 days would generate approximately £27.89 in interest if the full amount remained borrowed.
The 3% money transfer fee would be £30 upfront. Under this fixed-balance model, the overdraft interest reaches approximately £30 after about 32 days.
Illustrative break-even finding
If the full £1,000 overdraft would otherwise remain outstanding for more than roughly 32 days, a £30 money transfer fee could be cheaper than the illustrated overdraft interest, assuming the promotional terms are maintained and the transfer balance is cleared before promotional interest expires.
If you would repay the overdraft sooner, the fee could exceed the interest saved.
This is not a universal 32-day rule. If your overdraft balance falls as income arrives, your actual interest may be much lower. Likewise, transferring debt without a repayment plan can leave you with a new balance, a fee and substantial interest when the promotional rate ends.
MoneyHelper explains how 0% money transfer cards can be used to replace expensive overdraft borrowing, while warning about transfer fees, minimum repayments and promotional deadlines.
Why Comparing APRs Alone Can Be Misleading
APR stands for annual percentage rate. It provides a standardised way of expressing borrowing costs, but it does not reveal exactly how much you will pay in every situation.
For an overdraft, the amount borrowed can change daily as money enters and leaves your current account. For a credit card, interest can depend on transaction dates, statement dates, repayment amounts, promotional rates and the type of transaction.
A useful comparison therefore needs more than two headline percentages.
Check these five items:
- Actual borrowing rate: Use the rate offered to you, not only a representative advertised rate.
- Transaction type: Identify whether the borrowing is for purchases, cash, transfers or current-account payments.
- Repayment duration: Estimate how many days or months the balance will remain outstanding.
- Extra costs: Include relevant transfer fees, annual card fees, cash withdrawal charges or refused-payment fees.
- Repayment pattern: Account for payments made during the period instead of assuming the entire balance stays unchanged.
The MoneyHelper borrowing checklist recommends comparing total repayment costs as well as headline rates, payment amounts and charges.
How Your Repayment Behaviour Changes the Real Cost
The most important variable may not be which facility you use. It may be how quickly you reduce the balance.
Scenario 1: A salary payment clears the overdraft
You become £300 overdrawn shortly before payday, then your salary returns the account to a positive balance.
If you stay within the agreed limit, the cost may be limited to a short period of overdraft interest. If your account includes an applicable interest-free overdraft allowance, some or all of that borrowing could cost nothing.
However, the next month's essential bills must still be affordable after the salary arrives.
Scenario 2: A credit card balance carries forward
You put an essential £300 purchase on a credit card but cannot pay the full balance when due.
Interest may then apply according to the card terms. If you make only minimum payments, the debt may remain outstanding much longer than expected.
For this situation, an overdraft with a low actual rate could be cheaper than a high-interest credit card. The right answer requires comparing the two real repayment schedules.
Scenario 3: The overdraft never reaches zero
Your salary arrives, temporarily reduces or clears the overdraft, but regular spending pushes the account back below zero.
This pattern can make an overdraft a recurring source of debt rather than a temporary safety net.
Track your daily negative balances for several months. The total interest and the number of days overdrawn are more informative than the largest negative balance alone.
Which Borrowing Option Fits Your Situation?
| Your situation | Option to compare first |
|---|---|
| A purchase you can repay in full | Credit card with qualifying interest-free purchases |
| A temporary current-account shortfall | Existing arranged overdraft and its daily cost |
| Overdraft debt lasting several months | Affordable repayment plan or eligible 0% money transfer card |
| A large planned purchase | 0% purchase card if eligible and repayable within the offer |
| Repeated difficulty meeting bills | Budget review, creditor support and free debt advice before additional borrowing |
No single option is cheapest in every situation. A lower interest rate can be offset by fees, while a promotional 0% rate offers little benefit if the balance cannot be repaid before the promotion ends.
Important Risks That Borrowers Often Overlook
1. An arranged overdraft is still debt
It may feel like part of your account balance, but using an overdraft means spending money provided by the lender. Repeated borrowing can make budgeting more difficult.
2. Credit card minimum payments can prolong borrowing
Meeting the minimum payment avoids some immediate contractual consequences, but it does not necessarily prevent purchase interest. Paying more than the minimum generally helps reduce interest-bearing debt faster.
3. Overdraft limits can change
An arranged overdraft is generally not a guaranteed long-term source of funding. The provider may review the facility, subject to applicable contractual and regulatory protections.
4. Credit applications and account conduct can affect your credit file
Lenders may consider credit card balances, applications, overdraft usage and repayment behaviour when assessing creditworthiness. The effect depends on the credit reference agency, lender and wider credit profile.
5. A 0% deal has an expiry date
Promotional borrowing requires a repayment plan. Missing required payments may jeopardise promotional terms, while a balance remaining after the offer ends can attract a higher rate.
6. Moving debt is not the same as reducing debt
A money transfer can replace an expensive overdraft with cheaper borrowing, but it does not reduce the principal owed. Avoid using the cleared overdraft for additional spending unless you can afford both obligations.
Five Steps to Compare Your Actual Borrowing Costs
- Find your overdraft rate. Check your current account's overdraft agreement, applicable interest-free allowance and borrowing-cost illustration.
- Check your credit card terms. Identify purchase rates, interest-free conditions, cash rates, promotional offers and relevant fees.
- Estimate the borrowing period. Use your expected salary date, payment deadline and realistic monthly surplus.
- Calculate total cost. Add projected interest and any relevant fees for each option. Where balances fluctuate, calculate using the expected daily or monthly balances.
- Set a repayment deadline. Choose an affordable amount that clears the debt without creating another shortfall for essential spending.
If you already use an overdraft most months, start by examining your last three bank statements. Record how often the account falls below zero, the amount of interest charged and the date it next returns to a positive balance.
This simple review can reveal whether you need a brief cash-flow buffer or a more sustainable change to your borrowing and budget.
Frequently Asked Questions
Is an arranged overdraft cheaper than a credit card?
Sometimes. A low-cost or interest-free overdraft can beat an interest-bearing credit card balance. But a qualifying credit card purchase repaid in full during its interest-free period will usually cost nothing in purchase interest, whereas a standard overdraft may begin charging immediately.
Is an overdraft better than a credit card for emergencies?
An arranged overdraft can be useful when an urgent payment must leave your current account. A credit card may be cheaper for an eligible purchase if you can pay the full statement balance. Compare the specific transaction costs and whether the borrowing is affordable.
Can I pay off an overdraft with a credit card?
A standard card purchase facility does not directly clear an overdraft. However, an eligible money transfer credit card may let you transfer funds into your bank account. Check the transfer fee, promotional terms, transfer limits and repayment requirements first.
Does using an arranged overdraft hurt your credit score?
Not automatically. The impact depends on how the overdraft is used, reported and assessed. Persistent high utilisation, missed obligations and wider signs of financial stress may concern lenders.
Should I use a credit card to withdraw cash instead of an overdraft?
Usually, you should compare costs carefully before doing so. Standard credit card cash withdrawals can incur fees and interest immediately. An arranged overdraft may be cheaper, particularly for a brief withdrawal, but its actual rate and conditions still matter.
What if I cannot afford either repayment?
Contact the provider before missing payments. Ask about available support, affordable repayment arrangements and whether charges can be reduced in your circumstances. You can also use MoneyHelper's guidance on borrowing options and its links to free debt support.
Bottom Line: Compare the Total Cost, Not Just the Rate
An arranged overdraft may suit a very short current-account shortfall. A credit card may be cheaper for purchases that qualify for an interest-free period and are repaid in full. For debts that will remain outstanding longer, a suitable promotional card or structured repayment arrangement may offer a lower overall cost.
Before borrowing, write down three figures: the amount you need, the date you can repay it and the total interest and fees you expect to pay.
Those figures will usually tell you more than a headline APR alone.
Educational information only. This article focuses on UK consumer borrowing and is not individual financial advice. Product terms, eligibility and lender rates vary. Confirm current terms with your provider before making a borrowing decision.
