Finance Calculator
Business Loan Calculator
Estimate monthly repayments, total interest, and the overall cost of a business loan. Enter your loan amount, interest rate, term, and repayment frequency to see an indicative breakdown instantly.
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How is the repayment calculated?
This calculator uses a standard amortisation formula to determine the fixed repayment amount for a business loan. The formula spreads the repayment of principal and interest evenly across the loan term so that each payment is the same amount.
The formula used is:
Where:
- P = loan principal (amount borrowed)
- r = periodic interest rate (annual rate divided by number of payments per year)
- n = total number of payments (term in years — payments per year)
This is the same approach used by most UK business lenders for term loans with fixed repayments. It assumes a constant interest rate and equal periodic payments over the full term.
Assumptions and caveats
- •The interest rate is assumed to be fixed for the full term. Variable rate loans may produce different results over time.
- •Arrangement fees, early repayment charges, and other lender-specific costs are not included in this estimate.
- •The calculation assumes fully amortising repayments with no balloon payment or interest-only period.
- •Results are indicative only. Actual repayments will depend on lender terms, credit assessment, and facility structure.
- •All figures are in GBP and rounded to two decimal places.
Frequently asked questions
Business loan repayments are typically calculated using an amortisation formula. The monthly payment equals the loan principal multiplied by the monthly interest rate, divided by one minus the quantity of one plus the monthly rate raised to the negative power of the total number of payments.
Use the annual interest rate quoted by your lender. Business loan rates in the UK typically range from 3% to 15% depending on the lender, facility type, security, and business profile. If you do not have a quote, try a range of rates to compare outcomes.
This calculator estimates repayments based on principal and interest only. Arrangement fees, early repayment charges, and other costs are not included. Contact a lender or broker for a full cost breakdown.
Monthly repayments are made 12 times per year and result in lower individual payments. Quarterly repayments are made 4 times per year with higher individual amounts. The total interest paid may differ slightly depending on the repayment frequency.
Need to discuss funding options?
When you are ready to move from estimates to a formal conversation, speak to the Spark team about business loan options.
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