Top 6 Low Interest Business Loans in the UK (2026)

Low interest business loans in the UK are offered by high-street banks at representative APRs of 9.94–15.73%, with the government-backed Growth Guarantee Scheme enabling some lenders to provide below-market rates for eligible businesses. Here is how to find the cheapest business finance in 2026 and what genuinely qualifies as “low interest”.

What Counts as a Low Interest Business Loan?

In 2026, a “low interest” business loan is broadly anything below 10% APR for unsecured borrowing – a bar only TSB’s mainstream loan now clears among the major banks. The cheapest options currently are: Funding Circle (from 6.9% for strong applicants), TSB (9.94% representative APR), and Barclays (11.2% representative APR). For secured lending or government-backed facilities, rates can fall further – sometimes to 5–7% for the strongest credits.

What constitutes “low interest” is relative to the Bank of England base rate (3.75% as of June 2026, held for a fourth consecutive MPC meeting) and the risk profile of the borrower. A 7% APR for an SME business loan represents a spread of approximately 3.25 percentage points above base – competitive by historical standards for unsecured commercial lending. Rates below 5% for unsecured business loans are effectively only available through government-subsidised schemes like Start Up Loans or charity-backed programmes.

Lowest APR Business Loans: UK 2026 Comparison

The lowest available representative APRs from mainstream UK lenders are: Funding Circle (from 6.9%), TSB (9.94%), Barclays (11.2%), Santander (11.2%), HSBC (11.3%), and NatWest/RBS (15.73%). For businesses that cannot access bank finance, Funding Circle offers the most competitive alternative – though its undisclosed completion fee adds to the total cost.

Source: ExpertSure research, verified July 2026. Representative APR applies to at least 51% of approved applicants. Your rate may differ based on creditworthiness, loan amount, and trading history.

Funding Circle quotes from 6.9% per year on loans of £10,000 to £750,000 over 6 months to 6 years. That figure is an interest rate: a one-off completion fee is added on standard loans, so the true APR sits higher. Early repayment is free, and decisions arrive in as little as an hour – the strongest low-cost option outside the banks for established SMEs.

TSB’s 9.94% representative APR is the only sub-10% mainstream bank headline in 2026, on fixed-rate loans of £1,000 to £1 million over 1–10 years. Factor in the £250 arrangement fee – it adds 2.5% to a £10,000 loan but is negligible on larger amounts, which is where TSB shines. Full detail in our TSB review.

HSBC’s small business loan is the value pick at the £10,000–£25,000 size: 8.6% representative APR with no arrangement fee and no requirement to bank with HSBC. Under £10,000 the rate is 11.3%. The catch is the early repayment penalty of one month plus 28 days’ interest. See our HSBC review.

Barclays prices by band: 8.5% APR on £15,000–£25,000 – marginally under HSBC’s best – rising to 14.9% on the smallest loans, with an 11.2% representative rate overall and unsecured lending to £100,000. Early repayment is free and some borrowers can start with up to six months’ repayment holiday. See our Barclays review.

Santander’s 11.2% representative APR is mid-table, but the total-cost picture is stronger than the headline: no arrangement fee, no setup fee, and free overpayments on £1,000 to £50,000 over 1–7 years. You must hold a Santander business current account, and weaker profiles can be quoted up to 29.9%. See our Santander review.

NatWest and RBS share a 15.73% representative APR on £1,000 to £100,000 – the highest bank headline verified, softened by zero arrangement and zero early repayment fees. It earns its table place as a benchmark: if you already bank with NatWest, ask for a quote anyway (existing-customer pricing can beat the representative rate), then compare it against TSB and HSBC before signing. See our NatWest review.

Government-Backed Low Interest Business Loans

The Growth Guarantee Scheme (GGS), launched July 2024, allows accredited lenders to offer below-market rates to businesses that may not qualify for standard commercial terms. Lenders including Santander, NatWest, Lloyds, and Barclays participate. Loans from £25,001 to £2,000,000 are available on 3-month to 6-year terms. The government guarantee covers 70% of the lender’s risk, enabling more competitive pricing.

Government-backed business loan schemes in the UK have evolved through CBILS, RLS, and now the Growth Guarantee Scheme. The current GGS is less generous than COVID-era schemes (CBILS, BBLS) but remains relevant for businesses that cannot access standard bank finance:

• Eligibility: UK-based businesses with annual turnover under £45 million
• Loan sizes: £25,001 to £2,000,000
• Terms: 3 months to 6 years (term loans); up to 3 years (overdrafts and revolving facilities)
• Government guarantee: 70% of the loan – lenders absorb 30% risk
• Accredited lenders: Santander, NatWest, Lloyds, Barclays, TSB, Funding Circle, iwoca, and others

GGS does not set a maximum interest rate – the accredited lender sets its own rate. The practical benefit is access to finance for businesses that would otherwise be declined, not necessarily a significant rate reduction versus standard commercial lending.

Cheap Business Loans: What Actually Reduces Your Rate

The most effective ways to secure a lower rate are: borrow from your existing bank (which already holds your transactional data and has lower risk on you), provide security (secured lending rates are typically 2–5 percentage points lower than equivalent unsecured products), borrow larger amounts (many banks apply tiered rates where larger loans carry lower APRs), and use a whole-of-market broker for amounts above £100,000.

Several structural factors reliably reduce the interest rate you are offered on a business loan:

Existing banking relationship. Barclays, NatWest, Santander, and HSBC all note that existing customers benefit from faster processing and, in some cases, preferential rates. Santander’s low interest rate (11.2%) is only available to businesses that already hold a Santander business current account.

Larger loan amounts. Banks apply tiered APR structures where borrowing more attracts a lower rate. At Barclays, a £4,000 loan costs 14.9% APR while a £20,000 loan from the same lender costs 8.5% APR. If your actual funding need is close to a tier boundary, borrowing slightly more can reduce the effective rate on the whole facility.

Secured lending. Business loans secured against property, assets, or personal assets typically carry interest rates 2–5 percentage points below equivalent unsecured products. The lower rate reflects the lower risk to the lender. Personal guarantee requirements on unsecured loans provide partial protection to lenders but do not reduce rates in the same way as physical collateral.

Trading history and clean financials. Most banks want 2 years of filed accounts. Businesses with 3+ years of consistent, growing revenue and clean credit typically sit at the lower end of a lender’s APR range. Businesses at the minimum eligibility threshold typically sit at the top end. Improving your accounts before applying can materially affect the rate you are offered.

Low Interest Business Loan: What to Watch Out For

A low headline APR does not necessarily mean the cheapest loan. HSBC’s 11.3% APR carries an early repayment penalty that increases the effective cost if you settle early. TSB’s 9.94% APR includes a £250 arrangement fee that adds 2.5% to a £10,000 loan. Funding Circle’s 6.9% carries an undisclosed completion fee. Always calculate total amount repayable – APR + all fees – before comparing.

Lenders advertising low APRs sometimes offset the headline rate with fees that are less prominently disclosed. Before accepting a loan offer, always request and calculate:

• Total amount repayable – the sum of all capital, interest, and fees over the full term
• Arrangement / origination fee – one-off charge at drawdown
• Early repayment charge – if you might repay ahead of schedule
• Monthly maintenance or service fee – recurring charges some alternative lenders apply
• Break cost or exit fee – particularly relevant on variable rate products if rates fall

Related Business Loan Guides

Compare individual lenders we have reviewed in depth, or explore the full cost breakdown of business borrowing.

• Business Loan Costs UK 2026 – complete APR, fee, and worked example comparison
• HSBC Business Loans Review 2026 – 11.3% APR, no arrangement fee
• Santander Business Loans Review 2026 – 11.2% APR, no arrangement fee
• Funding Circle Review 2026 – from 6.9% APR, up to £750K
• Short-Term Business Loans UK – 3–18 month funding for urgent needs
• Capify Review – higher-cost alternative for businesses that cannot qualify for low-interest lending

Clara Wenslow

Finance & Business Services Editor

Clara analyses SME finance and procurement markets, covering business loans, invoice finance, payroll, and related B2B services. She ensures each comparison and guide is transparent and data-driven.

Reviewed by

Sarah Mitchell

B2B Commerce & Finance Reviewer