Most people compare a short term loan with an overdraft for the same reason. The car has broken down, the boiler needs fixing, or a bill has landed earlier than the wages. Both options can cover that gap, but they work in very different ways, and the cheaper option depends on how much you need, how quickly you can repay it and what protections you want around the borrowing.
This guide explains how each product works in the UK, what they cost in 2026, how they affect your credit score, and which option suits which situation. It is written for people weighing up real choices, not for marketing fluff.
Short answer
A short term loan is a fixed amount borrowed over a set term with set repayments, so the total cost is known on day one. An overdraft is a flexible borrowing limit attached to your current account that you dip in and out of, with daily interest charged only on what you use. Overdrafts tend to be cheaper for very small, short, one off amounts. A regulated short term loan is usually safer and more predictable for larger borrowing, or anything you cannot clear in a few days, because it has a defined end date and fixed repayments.
Direct answer
A short term loan is a small, fixed sum of money borrowed for a short period and repaid in either a single lump sum or a small number of instalments. In the UK, short term loans typically run from one to twelve months, with the amount borrowed, the interest rate and the repayment dates all agreed up front. That makes the total cost transparent before you sign.
At Fast Loan UK, short term loans run from £50 up to £2,000. New customers can borrow up to £800 over a maximum of eight months, and returning customers can borrow up to £2,000 over a maximum of twelve months. Every loan is regulated by the Financial Conduct Authority (FCA), and affordability is assessed before any money is paid out.
Because the structure is fixed, you know on day one what you will pay and when. That predictability is the main reason borrowers choose a short term loan over an open ended borrowing facility.
Direct answer
An overdraft is a borrowing facility built into a current account. It allows you to spend more than the balance in your account, up to a limit set by the bank, and you only pay interest on the amount you actually use. There is no fixed repayment date, and any money paid into the account automatically reduces the overdraft balance.
There are two main types of overdraft in the UK, and the difference between them matters.
An arranged overdraft is one you have applied for and the bank has agreed to. You are told the limit in advance, you know the interest rate, and the cost is included in the published terms of your current account. Using an arranged overdraft within its limit is a routine form of short term borrowing.
An unarranged overdraft happens when a payment takes your balance below zero without prior agreement, or pushes you past the limit on an existing arranged overdraft. Since April 2020, the FCA has required banks to charge the same simple interest rate for arranged and unarranged use, so the punishing daily fees of the past are no longer permitted. However, unarranged overdrafts can still be reported to credit reference agencies and can affect your ability to borrow in future.
FCA Reform
In 2019, the FCA confirmed the biggest overhaul of the overdraft market for a generation. Since 6 April 2020, banks must charge a single simple annual interest rate on overdrafts, with no separate daily fees and no higher rate for unarranged use. The rules also require firms to identify customers showing patterns of repeat overdraft use and offer help to reduce reliance on the facility (FCA, PS19/16; CONC 5D).
Direct answer
Yes. An overdraft is a form of credit, which means it is a loan from your bank. It is classed as a regulated credit agreement under FCA rules, just like a personal loan or credit card. The main difference is the structure. A personal loan or short term loan has a fixed amount, a fixed term and fixed repayments. An overdraft is revolving credit with no set end date, so the bank can review or withdraw it, and you only pay interest on what you use.
Treating an overdraft like spare money in your account is one of the most common mistakes consumer finance experts warn about. As Martin Lewis has repeatedly pointed out, a debit card used in an overdraft is acting as a debt card. Planning to clear an overdraft balance, rather than living in it month after month, is essential.
A personal loan is a fixed term loan, usually for larger amounts than a short term loan, and is generally repaid over one to seven years. Comparing an overdraft with a personal loan brings the structural differences into sharp focus, and most of those differences also apply to short term loans.
| Feature | Personal / short term loan | Overdraft |
|---|---|---|
| Amount | Fixed, paid in one transfer | Variable, up to an agreed limit |
| Repayment | Fixed schedule, set instalments | No set schedule, repaid as account is credited |
| Interest | Fixed on the original amount | Daily on the amount used |
| Term | Defined start and end date | Open ended until withdrawn |
| Best for | Planned borrowing, larger sums, longer terms | Short, small, unpredictable cash flow gaps |
| Main risk | Missing a repayment damages credit score | Becoming reliant on the facility long term |
For larger amounts spread over more than a few months, a personal loan or instalment loan is almost always cheaper than an overdraft. For very small amounts cleared within days, an arranged overdraft is often the cheapest option, provided you stay within the limit.
At a glance
The main advantage of a short term loan is certainty. You know the total cost, the repayment dates and the end date before you sign, and the lender must check the loan is affordable for you. The main disadvantage is that APR is higher than a long term personal loan, because the lender recovers their costs over a shorter window.
At a glance
The main advantage of an overdraft is flexibility. It is already in place, you only pay interest on what you use, and a small balance cleared in days is genuinely cheap. The main disadvantages are that headline interest rates are high (typically 34% to 40% EAR in 2026), there is no automatic end date, and persistent use can damage your credit score.
Cost answer
For very small borrowing repaid within a few days, an arranged overdraft is usually cheaper because interest is charged daily on the exact amount used. For larger amounts, or anything you cannot clear within a week or two, a regulated short term loan is often cheaper in total cost and far more predictable, because the repayments and end date are fixed.
The reason headline figures can be misleading is that APR annualises the cost. A 39.9% overdraft used for £100 over five days will only ever cost a few pounds. The same 39.9% applied to £1,500 sitting in your overdraft for six months is a very different bill. Equally, the high APR on a short term loan looks alarming as a percentage, but on £300 borrowed over a few months the pounds and pence figure can be lower than a comparable overdraft period if you are realistic about how long the debt will actually sit there.
The honest answer is to compare in pounds, not percentages. Work out how much you need, how long you genuinely need it for, and ask the lender or your bank for the total cost of borrowing in cash terms. That is the only fair comparison.
Direct answer
Yes. Overdrafts are reported to UK credit reference agencies, so they appear on your credit file. Having an arranged overdraft and using it sensibly is generally neutral or mildly positive. Regularly going over the limit, sitting at the maximum, or staying overdrawn month after month can damage your score and signal financial difficulty to other lenders.
Lenders looking at your credit report can see whether you have an overdraft facility, what the limit is, and how you are using it over time. A modest, well managed arranged overdraft tells a lender you can handle revolving credit responsibly. An account that is constantly maxed out or repeatedly tipping into unarranged territory tells the opposite story.
Short term loans also appear on your credit file. Repaying a short term loan on schedule builds a record of on time repayments, which can support future applications. Missing repayments has the opposite effect.
The right answer depends on the size of the borrowing, how long you need the money, and whether you want a defined end point.
Short term vs long term loans
A short term loan is not the same as a long term personal loan. Short term loans are designed for amounts up to around £2,000 over up to twelve months. Long term loans typically cover larger amounts, often £3,000 to £25,000, repaid over one to seven years, and usually carry lower APRs because the lender recovers their costs over a longer window. If your borrowing need is large and you can afford a longer term, a long term loan is usually cheaper than either a short term loan or extended overdraft use.
Imagine the same £400 shortfall covered three different ways:
In the first scenario, the overdraft wins easily. In the second, the overdraft becomes expensive and there is no automatic end date forcing you to clear it. In the third, the short term loan provides discipline and predictability. The right product depends on which of those scenarios most closely matches your situation.
Both overdrafts and short term loans are forms of regulated credit. Both should be used for a clearly defined need, and both can cause problems if they become a permanent fixture in your finances. Before borrowing anything, check that you can afford the repayments alongside your other commitments, and read the agreement in full. Free, independent guidance is available from MoneyHelper, the government backed money advice service.
Fast Loan UK is an FCA authorised direct lender based in Welwyn Garden City. Every loan application is assessed for affordability before any money is issued, and the full cost of borrowing is shown before you sign. You can read more about our approach on the responsible lending page, or see how the process works on how it works.
Yes. An overdraft is a regulated form of credit provided by your bank, so it functions as a short term loan attached to your current account. The structure differs from a personal loan or short term loan because there is no fixed term, repayment schedule or set amount. Interest is charged only on the balance you use, but the underlying agreement is still a loan.
For very small amounts cleared within a few days, an arranged overdraft is usually cheaper because interest is charged daily on the exact amount used. For larger amounts, or anything you cannot repay quickly, a fixed short term loan is often cheaper in total pounds and pence, because the cost is capped and the end date is fixed. Compare the total cost of borrowing in pounds, not APR percentages.
Yes. Overdrafts appear on your credit file. A modest, well managed arranged overdraft is generally neutral or mildly positive. Repeatedly maxing out your limit, frequently going into an unarranged overdraft, or remaining overdrawn every month can damage your score and signal financial difficulty to other lenders. The FCA requires banks to identify customers in repeat overdraft use and offer support.
Use a short term loan when the amount you need is larger than your overdraft limit, when you want a fixed end date and predictable repayments, when the expense is a clear one off cost such as a car repair or boiler, or when you want the total cost agreed in writing before you commit. An arranged overdraft is better suited to very small, very short term gaps.
Not quite. Payday loans are a type of high cost short term credit, traditionally repaid in one lump sum on the borrower’s next payday. A modern short term loan from an FCA authorised lender like Fast Loan UK is usually repaid in fixed instalments over a few months, which makes the repayment far more manageable. Both are regulated under FCA high cost short term credit rules.
