Use a business overdraft for short gaps you expect to clear within weeks, and a business loan for something you are buying that will last or that you will be paying off for months. The overdraft is a safety net for timing problems. The loan is a planned purchase with a known repayment bill.
That covers most cases. The rest of this piece explains why, what each one really costs, who can get them, and where each tends to go wrong.
What a business overdraft is
An overdraft is a borrowing facility attached to your business current account. It lets you overdraw the account, spending more than the balance, up to an agreed limit set by your bank. If you have £200 in the account and pay a £1,200 bill, the balance simply shows -£1,000, provided that is inside the limit.
There is no separate application each time and no fixed repayment date. Money coming in reduces the balance, and the full limit is available again once you clear what you owe. Most major UK banks offer a business overdraft limit from £500 to £50,000, though what you are offered depends on your trading history and finances. Banks often set the limit as a percentage of your turnover.
Two terms are worth knowing. An arranged overdraft is one you applied for and the bank approved in advance. An unarranged overdraft is where you go below zero with no agreement, or past your limit. The second is the expensive one, and we come back to it below.
What a business loan is
A loan is a lump sum paid into your account, which you repay over a set period, usually in fixed monthly amounts. The amount, interest rate and term are agreed upfront, so you know the commitment from day one.
The price of that certainty is paperwork. Lenders usually run a credit check and may want security. That means an asset they can claim and sell if you cannot repay. They typically want to see a track record and sensible cash flow forecasts. Approval can take days or weeks, not hours.
Benefits of a business overdraft
Used for the right job, business overdrafts have real advantages:
- You are charged interest on the amount you borrow, not on the whole limit. If your limit is £20,000 and you use £3,000 for a week, you pay interest on £3,000 for seven days. The unused part costs nothing.
- It is quick once it is in place. The money is already there, so a supplier invoice that lands on Tuesday can be covered while a customer payment arrives on Friday.
- There is no fixed repayment schedule. You clear the balance when cash comes in.
- You can use your overdraft again and again. For a seasonal business or uneven income, that beats applying for a new loan every time a gap appears.
- It keeps key payments on track. A buffer can stop missed supplier payments or failed direct debits while you wait to be paid.
That makes it well suited to short-term cash flow gaps, particularly when the amount and the timing are uncertain.
Disadvantages of a business overdraft
The downsides are cost and control.
The main risk is that the bank, not you, controls it. An overdraft is typically repayable on demand, meaning the bank can ask for the money back or cut your limit at short notice. Banks usually do this when your position changes: turnover drops, the account sits near the limit for months, or payments are missed elsewhere. If you rely on the overdraft to make payroll, that is the worst moment to lose it. Keep a back-up plan.
Other drawbacks:
- The rate is higher than most loans. Overdrafts generally cost more per pound borrowed, and the cost builds quickly if you stay overdrawn.
- It is variable, so the total cost is hard to predict.
- You can only get one from your own bank. To shop around you usually have to move your whole business banking relationship.
- It is easy to lean on. With no repayment schedule it can become a habit. If you are overdrawn more often than not, you probably do not have a timing gap, you have a wider cash flow problem, and the overdraft is hiding it.
So are business overdrafts a good idea? Yes, as a short, occasional buffer. No, as a permanent source of working money. Occasional use that you clear promptly is unlikely to trouble your credit record. Constant use, or going past the limit, can look like financial strain to future lenders.
How the cost works
This is where the two products differ most, and it is not just about the headline rate.
- Overdraft: you pay interest only on the amount you are actually overdrawn. Interest is calculated daily and then applied to the account monthly. Banks may add an arrangement fee, a yearly renewal fee, or a monthly or annual fee depending on the limit. Fees may also apply if you change the limit.
- Loan: you pay interest on the whole amount from day one, whether or not you needed all of it straight away. There may be an arrangement fee, a charge for repaying early, and late payment fees if you miss an instalment.
Rates differ a lot between banks, so check your own. One high-street bank, for example, shows a representative rate of 15.62% EAR on unsecured overdrafts up to £25,000. EAR means equivalent annual rate: what you would pay if you stayed in overdraft for the entire year, including interest on interest. It is a comparison tool, not a prediction of what a short dip will cost.
So what does a short dip cost? Here is an illustration. Say you have an overdraft at 12% EAR, a rate chosen purely to show the sums, and you need £8,000 for 14 days while a customer pays.
- Daily rate: 12% divided by 365, about 0.033%.
- Interest: £8,000 × 0.033% × 14 days, about £37.
Most owners would pay that for a fortnight of breathing room. Now leave the same £8,000 overdrawn for three months. The interest comes to roughly £240, before any fees. Same product, same rate, very different result. Length of time is what turns an overdraft from sensible to expensive.
Why the Bank of England Bank Rate matters
Overdraft pricing is usually variable, and many banks link it to the Bank of England Bank Rate. At one high-street bank the rate is 10.85% a year above Bank Rate for the smaller limit bands, and any change in Bank Rate is passed on immediately, without notice. Your interest rate can therefore move without you doing anything. That is fine for a fortnight and awkward for a year.
Going past your limit costs more again. At that same bank the unauthorised rate is also 10.85% above Bank Rate, plus a £7 fee for every payment it cannot make. Arrange the limit before you need it.
Repayment: what can go wrong with a loan
A loan's strength is also its risk: the repayments are fixed. They are due whether or not the customer paid you on time this month. For a business with uneven income that can pinch. Miss payments and you risk late fees, damage to your credit rating and other consequences.
It can also cost more than you need if you borrow too much. Because interest runs on the full sum from day one, borrowing a comfortable cushion on top of what you need means paying for money that sits idle.
Security matters too. If a lender asks for a personal guarantee, you are personally liable if the business cannot repay. Read it carefully before signing. Overdrafts can ask for one too, especially at larger limits, though smaller arranged overdrafts for established businesses are sometimes offered without.
Which one fits which job
| Situation | Better fit | Why |
|---|---|---|
| Waiting on a customer payment, due to pay a supplier or VAT | Overdraft | Short, and you only pay for the days you use |
| Seasonal dip you know will pass | Overdraft | Reusable, no fresh application each time |
| Uncertain amount, uncertain timing | Overdraft | Flexible, you borrow only what you need |
| New machinery, a vehicle, fitting out premises | Loan | Lasts for years, repayments can be budgeted for |
| Hiring or a specific project | Loan | Known cost, structured repayments |
| Carrying the balance for months | Loan | Overdraft rates tend to cost more over time |
The simple test is how long you will owe the money. If you expect to pay back the borrowing within a few weeks, an overdraft is practical. If it will be months, a loan is usually cheaper and far easier to plan around.
Two quick examples
A trades business with a VAT bill due on Friday. A large customer has promised payment the following week. This is a classic overdraft job. The gap is days long, the money is coming, and you pay interest only until it lands. A loan would mean paperwork and interest on a sum you only needed briefly.
A small manufacturer replacing a machine. The machine will earn money for years, so the borrowing should be spread over those years. A loan gives fixed repayments, a rate agreed upfront and a repayment line in the budget. Funding it from an overdraft would cost more and leave the bank free to pull the facility mid-way.
Can you get a business overdraft?
To get a business overdraft you generally need to be at least 18 and already hold a business bank account with the bank you are asking. Some banks also want the business to have traded for a set time, and companies are usually expected to be UK based.
The bank's eligibility criteria usually look at your business credit history, your cash flow, your revenue and any debt you already carry. Expect a credit check and some questions about why you need the money and how you will repay it.
When you apply for a business overdraft, you can usually do it online or by phone. Be ready with:
- business bank statements for the past three to six months
- your latest financial accounts
- a cash flow forecast
- a business plan, especially if the business is new
Approval is not guaranteed, and the bank may offer less than you asked for. Terms differ by bank. Some let a limited company apply for an overdraft when it opens the account, while a sole trader may have to wait until the account has been running for three months.
What if it is a new business?
A new business has the hardest time. Overdrafts and loans both lean on trading history, and a bank loan can be difficult to get without one. Unsecured loans, which need no asset as security, generally need a good trading record.
Start Up Loans is the exception worth knowing. Start Up Loans provides unsecured finance of between £500 and £25,000 to businesses that have not started trading or have traded for up to 60 months. A short-term overdraft is then usually easier to add once the account has some history.
Borrowing more than £50,000
Most major UK banks cap a standard overdraft at £50,000, so anything bigger usually means a conversation with the bank rather than an online form. Loans stretch further. Lenders usually will not go above £25,000 unsecured, although up to £40,000 can sometimes be reached, and secured loans of up to £125,000 are typically available. Secured means the lender holds something you own as security, which could even be your home. Anything larger is arranged case by case and depends on your accounts and security.
You can also hold both. A loan for the equipment and an overdraft for the day-to-day swings is a perfectly normal combination, as long as the lender is satisfied you can afford the repayments on both.
Other options worth a look
- Invoice finance. If late-paying customers are the real problem, borrowing against unpaid invoices can fit better. Our guide to invoice finance in the UK covers how it works.
- A business credit card. Useful for small or recurring purchases, but the interest rate is high unless you clear the balance in full each month.
- Fixing the gap itself. Often cheaper than financing it. Our piece on improving cash flow is a good place to start.
Is a business overdraft better than a loan?
Neither is better in general. They do different jobs, and the question is which job you have.
Treat an overdraft as a safety net and a loan as a tool. Arrange a modest overdraft before you need it, because arranging one in a crisis is harder. Use a loan when the thing you are buying will outlast the repayments. Whatever your business needs, check the interest rate, the fees and the repayment terms in writing before you sign. And if you find yourself living in the overdraft, treat that as a signal to look at why the cash is not arriving when you need it, not as a cue to ask for a bigger limit.
If you are weighing a loan against what your bank is offering, Deplexifi can put the options side by side.
Living in the overdraft: it is built for gaps measured in weeks, and the bank can cut it back just when you rely on it most.