How to Compare Business Loan Offers: The Metrics That Actually Matter
Julian Dobbin
CEO · Apr 21, 2026 · 8 min read
Most UK business owners compare loan offers by looking at the monthly payment. This is the least useful metric for understanding whether a loan represents good value. This guide explains the numbers that actually matter when comparing business loan quotes, the ones that reveal the true cost and whether one offer is genuinely better than another.
Total amount repayable: the only number that matters for cost
The total amount repayable is the sum of all payments you will make over the loan term, including principal and all interest. Subtract the loan amount from the total repayable to get the total interest cost in pounds. This is the definitive measure of how much a loan costs, regardless of term length, monthly payment amount, or APR. A loan with a lower APR but a longer term can cost more in total interest than a loan with a higher APR and shorter term.
When comparing offers, calculate the total interest in pounds for each option, normalised to the same term if possible. A 100,000 pound loan at 12 percent APR over 5 years has a total interest of approximately 32,000 pounds. The same loan at 15 percent APR over 3 years has total interest of approximately 24,000 pounds. The higher APR option is 8,000 pounds cheaper because the shorter term reduces the period over which interest compounds.
Fees: what to identify beyond the interest rate
Arrangement fees (typically 1-3 percent of the loan amount) are charged on most business loans. On a 200,000 pound loan, a 2 percent arrangement fee is 4,000 pounds. Some lenders add this to the loan amount (capitalise it), meaning you pay interest on the fee as well as the loan. Others deduct it from the drawdown, meaning you receive 196,000 pounds but repay 200,000 pounds.
Early repayment charges (ERCs) are penalties for repaying the loan early. ERCs can be expressed as a number of months' interest (commonly 1-3 months), a percentage of the outstanding balance, or a declining scale over the term. If there is any possibility you will want to refinance or repay early (for example, if you are expecting a large cash receipt, a property sale, or a business sale), an ERC clause requires careful attention. An ERC of 3 months' interest on a 300,000 pound loan at 12 percent APR is approximately 9,000 pounds.
"The cheapest loan is not the one with the lowest monthly payment or the lowest headline APR. It is the one with the lowest total interest in pounds, after all fees, adjusted for the real value of any personal risk you are taking on."
- Julian Dobbin, CEO, Spark Finance
APR: useful for comparison, not for understanding total cost
APR is useful for comparing the rate of two loans over the same term with the same fees. It normalises the interest cost into an annualised percentage that accounts for the timing of payments. A loan at 12 percent APR is always more expensive per year than one at 9 percent APR, all else being equal.
APR is less useful when comparing loans of different terms or when significant fees are involved. A lender offering a very low rate with a large arrangement fee may have a lower headline APR than a lender with a slightly higher rate and no fees, but the total cost in pounds may be higher. Always convert APR into total interest in pounds before drawing conclusions.
Security and guarantee requirements: the hidden cost
A lower interest rate loan that requires a personal guarantee over your home represents a different risk profile to a slightly more expensive loan that requires only a corporate guarantee. The personal guarantee is a cost that does not appear in the financial comparison but is real and significant. When comparing offers with different security requirements, factor in the value of protecting your personal assets.
Similarly, a loan secured against business assets (equipment, property) carries the risk that those assets could be repossessed if the loan defaults. A lower rate on a secured facility may not be worth the operational risk of losing a critical business asset. Always assess the full cost of the facility, including the non-financial risk of the security package.
The bottom line
Spark Finance presents all loan offers in a standardised format that includes total interest in pounds, all fees, total cost, monthly payment, and security requirements, making genuine comparison straightforward. Apply at apply.sparkfinance.co.uk to receive multiple comparable offers.
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