Finance Calculator UK
Before you commit to a credit card, personal loan, or finance agreement, it helps to know exactly what you’ll be paying each month, and how much the deal will really cost you over its lifetime. Our free Finance Calculator does the maths for you, so you can compare offers side by side and choose with confidence instead of guesswork.
Whether you’re comparing a personal loan, a car finance agreement, or working out repayments on a balance transfer, this tool gives you an instant, accurate breakdown based on the figures you enter.
Feel free to use our Equipment Finance Calculator
**Note: For exceeding 120 no. of payments, a group of 12 payments will be combined into a single payment number for better chart visibility.
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Calculator Disclaimer
The repayment amount shown using this calculator is an estimate, based on information you have provided. It is provided for illustrative purposes only and actual repayment amounts may vary. To find out actual repayment amounts, contact us. This calculation does not constitute a quote, loan approval, agreement or advice by My Finance. It does not take into account your personal or financial circumstances.
How Does the Finance Calculator Work?
Simply enter your loan details into the fields below, and the calculator will work out your monthly repayment, total interest, and total amount repayable — instantly, with no sign-up required.
1. Loan Amount
This is the total amount you want to borrow (the principal). Enter the full amount before any interest is added.
2. No. of Payments
The total number of instalments you’ll make over the life of the loan — for example, a 3-year loan paid monthly would be 36 payments.
3. Monthly
This sets how often repayments are made. Most UK loans are repaid monthly, but the calculator can be adjusted if your agreement uses a different schedule.
4. Payment Mode — In Arrears / In Advance
This determines when in each period your payment is due:
- In Arrears — the most common setup for UK loans. You use the loan for the period first, then pay at the end of it (e.g. end of the month).
- In Advance — payment is due at the start of each period, before that period’s use of the loan. This slightly lowers the total interest charged, since the balance reduces sooner.
5. Interest Rate
Enter the annual interest rate (APR or nominal rate) stated in your loan or credit agreement. The calculator converts this into the correct rate per payment period automatically.
Why “In Arrears” vs “In Advance” Matters?
It’s a small detail that makes a real difference to your total cost. Because “in advance” payments reduce the outstanding balance earlier in each period, less interest accrues overall, so for the same loan amount, rate, and term, an “in advance” schedule will always work out slightly cheaper than “in arrears.”
What the Calculator Shows You?
Once you enter your figures, you’ll instantly see:
- Monthly Repayment—what you’ll pay each period
- Total Interest—the total cost of borrowing over the full term
FAQ’S
Is this calculator accurate for all loan types?
It’s designed for standard installment loans (personal loans, car finance, and fixed-term credit agreements) that use a fixed interest rate and equal regular payments. Variable-rate products or interest-only loans may differ.
Does this affect my credit score?
No. This is a simple maths tool, no credit check, no application, and no personal data required.
Is this financial advice?
No. This calculator is for informational and illustrative purposes only. Always check the exact figures with your lender before signing any agreement.
Is this finance calculator free to use?
Yes, you can use this finance calculator free on this website.