Business loan interest rates: how they're set and how to compare them

A business loan interest rate is the price a lender charges for lending you money, expressed as a percentage of the amount borrowed. Lenders quote that price in different ways, which is why two offers with similar headline figures can cost very different amounts. This guide explains how rates are quoted, what drives them and how to compare offers fairly.

Smart Funding Solutions is a broker: we don't set rates, lenders do. We compare pricing across our panel of 300+ lenders so you can see the real cost side by side. For the products themselves, see our business finance overview.

01How do I find a reputable SME loan provider with competitive rates in the UK?

Compare established lenders on the total cost of borrowing, not just the headline rate, because the rate you are offered depends on your trading history, credit, security and the loan term. Smart Funding Solutions, a whole-of-market commercial finance broker, compares SME lenders across a panel of over 300 so you can see which offers the best overall value for your business.

How to check a lender is reputable

• Confirm the lender's details on the FCA Register and Companies House where relevant.
• Read independent information about what it offers. Our lender reviews cover the lenders on our panel.
• Make sure every fee, the early repayment terms and any personal guarantee are set out in writing.

Getting a competitive rate

Ask for the total amount repayable and compare offers over the same term. Offering security, choosing the right product for the purpose and having up to date accounts can all improve the terms a lender offers. Our business loan costs guide explains the fees to look for. Instant Quotes shows which lenders on our panel may suit you, with no credit check.

02Business loan interest rates in the UK today

Bank of England Bank Rate is 3.75%. The Monetary Policy Committee held it at that level on 17 September 2026 (Bank of England, Bank Rate). Bank Rate is the starting point for borrowing costs across the market, and variable rate business loans are usually priced as a margin above it. The Bank of England's own figures put the average effective rate on new bank loans to SMEs at 6.63% in August 2026 (Bank of England, Money and Credit August 2026).

That average covers new loans from banks only. Many smaller businesses pay more, because unsecured, short term and specialist finance usually costs more than mainstream bank lending. Across the lenders on our panel, the typical starting rates in October 2026 were as follows.

Type of finance	Typical starting rate	Lowest published starting rate
Unsecured business loans	11.25% to 21.5% a year	From 6%
Secured business loans	11.05% to 18% a year	From 8.99%
Asset finance	8.3% to 13.6% a year	From 5.1%
Invoice finance	6.25% to 7.9% a year on funds drawn, plus a service fee	From 5.75%
VAT and tax loans	9.15% to 18% a year	From 8.9%

The typical starting rate is the middle half of the "from" rates that lenders on our panel publish, before fees. These are indicative ranges, not offers, and the rate you are offered depends on your business. Our page on how much a business loan costs shows the full method, and the business finance rate index is rebuilt from the panel data whenever lenders change their pricing.

03How business loan interest is quoted

Interest compensates the lender for the use of its money and the risk that it may not be repaid. Lenders express cost in several ways, so compare like with like:

How it's quoted	What it means	Watch out for
Annual interest rate	Yearly rate on the outstanding balance, which falls as you repay	Excludes fees
APR	Interest plus certain fees, shown as an annual figure	Not always quoted on business lending
Flat rate	Interest on the original amount for the whole term	Looks lower than an equivalent reducing-balance rate
Factor rate	A fixed multiple of the amount advanced, used by merchant cash advances and some short-term products	Total cost is fixed; repaying faster usually saves nothing
Monthly rate	Rate per month, common on bridging and short-term finance	Multiply by twelve for a rough annual comparison

Why a flat rate looks cheaper than it is

With a flat rate, interest is worked out on the full amount you borrowed for the whole term, even though you are paying the balance down every month. On a loan repaid in equal instalments, the equivalent reducing-balance rate can be nearly double the flat rate. Always ask for the total amount repayable or an equivalent annual rate.

How a factor rate works

A factor rate is a multiplier rather than a percentage. You repay the amount advanced multiplied by the factor rate, and that total is fixed at the start. Because the cost doesn't reduce if you repay sooner, a factor rate product repaid quickly can have a very high effective annual cost.

04A simple way to compare any two offers

1. Add up every repayment over the full term.
2. Add arrangement, valuation, legal, broker and any exit fees.
3. Deduct the amount you will actually receive; this is the total cost of borrowing.
4. Divide the total cost by the amount received to get the cost per pound borrowed.
5. Check the monthly repayment against your quietest month.

This works whether one lender quotes an APR, another a flat rate and a third a factor rate, and it stops a low headline figure hiding a higher total.

Looking for the monthly cost rather than the rate? Use our business loan calculator to see the repayment, total interest and total cost for the amount, rate and term you enter.

Interest compensates the lender for the use of its money and the risk that it may not be repaid.

05Fixed and variable rates

Fixed rates

The rate stays the same for the agreed term, so repayments are predictable. That makes budgeting and managing business loan repayments simpler and protects you if market rates rise. The trade-off is that you do not benefit if rates fall, and early repayment charges may be higher.

Variable rates

The rate moves with a benchmark, typically the Bank of England base rate, plus a margin set by the lender. Repayments fall if the benchmark falls and rise if it increases. Variable-rate facilities can offer more flexibility, such as overpayments without a charge, but you need headroom in your budget for possible increases. Some products include a cap on how far the rate can rise.

06What affects the rate you are offered

Your credit profile

Businesses and directors with clean credit histories represent lower risk and are usually offered lower rates. Defaults, CCJs or missed payments tend to mean higher pricing and fewer options, though bad credit business loans are available from specialist lenders.

Trading history and financial strength

Consistent revenue, healthy margins, manageable existing debt and up-to-date accounts all support better pricing.

Security

A secured business loan backed by property or assets usually carries a lower rate than an unsecured loan, because the lender has something to recover if you cannot repay.

Loan size and term

Longer terms can reduce monthly payments, but you pay interest for longer, so the total cost may be higher. Very small or very short loans may carry higher rates because the lender's fixed costs are spread over less.

The base rate and wider economy

When the Bank of England raises its Bank Rate, borrowing costs across the market generally rise, and vice versa. Lenders' appetite also changes with economic conditions.

The type of product and lender

High street banks, specialist lenders and online platforms price differently. Faster, more flexible products tend to cost more than slower, secured borrowing.

£150,000A transaction we arranged£150K requirement. Two repayment structures. One solution.We split the facility: £78,000 repaid over five years and £72,000 interest-only, so repayments fitted how the business runs.

07Fees that affect the true cost

• Arrangement or origination fees
• Broker fees, where applicable
• Valuation and legal fees on secured loans
• Early repayment or exit charges
• Non-utilisation fees on revolving facilities
• Late payment charges

To see what those fees and rates add up to in pounds, our page on how much a business loan costs sets out typical rates, fees, terms and loan sizes by type of finance, with worked examples.

08How to secure a better interest rate

1. Strengthen your credit profile by paying on time, reducing outstanding balances and correcting errors on your credit files.
2. Get your figures in order. Up-to-date accounts and management figures reduce the lender's uncertainty.
3. Offer security if appropriate, understanding the risk to the asset.
4. Choose the right term, balancing monthly affordability against total cost.
5. Compare offers on total repayable, not the headline rate.
6. Apply selectively. Several hard searches in a short period can make lenders more cautious.

09How to compare business loan quotes side by side

To compare business loan quotes, put each offer into the same table: the cash you actually receive, every repayment, all fees and the total you will pay back. The example below is illustrative only, not a quote from any lender, and shows how a lower headline rate can still cost more.

Illustrative comparison: two offers for £50,000 over 36 months

	Offer A	Offer B
How the rate is quoted	About 9.9% a year on the reducing balance	5% a year flat rate
Arrangement fee (deducted from the loan)	£1,000	£2,500
Cash you receive	£49,000	£47,500
Monthly repayment	£1,610.00	£1,597.22
Total repaid over 36 months	£57,960	£57,500
Total cost (total repaid minus cash received)	£8,960	£10,000
Cost per £1 received	About 18.3p	About 21.1p

Offer B's flat interest is £7,500 (5% of £50,000 for three years), and its monthly payment is slightly lower, so it looks cheaper. Once the larger fee is taken off the cash you receive, it costs £1,040 more than Offer A.

Other columns worth adding

• Early repayment: what you would save, or pay, by settling early. Our guide to paying off a business loan early explains the charges.
• Security and guarantees: a personal guarantee or a charge over property changes the risk, even if the cost is similar.
• Repayment pattern: fixed monthly, seasonal or a percentage of card takings, as with a merchant cash advance.
• Speed and conditions: how quickly funds are released and what must be provided first.

Comparison sites show indicative products; a broker can return offers based on your actual figures, so the table compares real terms. Our guide to how instant business loan quotes work explains what an indicative quote can and cannot tell you.

If you are deciding whether to go direct or use an intermediary, our guide to what a business loan broker does covers how brokers choose lenders and what to ask about fees and commission.

10Current indicative rate ranges by product

For the rate ranges, loan sizes and terms that lenders on our panel publish today, by type of finance, see our UK business finance rate index. It is generated from our panel data and shows median starting rates as well as the lowest, which is a more realistic guide for most businesses. For the terms used in loan offers, see the business finance glossary.

11How to get a low interest business loan

The lowest rates go to businesses that give a lender the least risk. These are the levers that move your rate the most.

• Offer security where it makes sense. Secured loans and asset finance start lower than unsecured loans because the lender can recover the property or equipment. The risk to that asset is the trade-off.
• Show two or more years of accounts. Several lenders on our panel publish lower rate bands for businesses with a longer trading record and steady profit.
• Keep your credit files clean. Missed payments, defaults or a CCJ push pricing towards the top of each range or narrow the lenders who will look.
• Choose the shortest term you can afford. A shorter term usually means less interest in total, even where the monthly payment is higher.
• Ask about government-backed lending. Under the Growth Guarantee Scheme, accredited lenders receive a 70% government-backed guarantee on the outstanding balance, which can help a viable business without much security. Your business stays 100% liable for the debt (British Business Bank, Growth Guarantee Scheme).
• Starting a business? A government-backed Start Up Loan is a personal loan of £500 to £25,000 at a fixed 7.5% a year, repaid over 1 to 5 years (GOV.UK, apply for a Start Up Loan). See our page on start up business loans for the other routes open to a new business.

The lowest advertised rate is rarely the cheapest loan once fees and the term are counted, so compare the total repayable. To put several lenders' offers side by side, use our guide to comparing UK business loan providers, and to see what any rate means in monthly repayments, try the business loan calculator.

12Compare rates through a broker

We search our panel for lenders whose criteria and pricing suit your circumstances, then set out each offer's total cost so you can compare them fairly. Lenders make the decisions. It is free to enquire; any broker fee is disclosed separately before you proceed. When you are ready, you can start an application online.