Loan Overpayment Calculator
See how extra monthly payments reduce your loan term and total interest.
Loan & Overpayment
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Even small overpayments can save thousands in interest.
What is a Loan Overpayment Calculator?
A loan overpayment calculator shows how making extra payments each month affects your loan. It calculates how many months you’ll save and how much interest you’ll avoid—helping you decide if overpaying is worth it.
How Overpayments Work
When you overpay, the extra amount goes toward reducing the principal. That means:
- Less interest accrues each month
- Faster payoff—you clear the loan sooner
- Total interest drops significantly
Example
- £100,000 loan at 4% over 25 years
- Base payment: ~£528/month
- Add £100/month overpayment
- Result: Pay off ~5 years earlier, save ~£15,000 in interest
Tips
- Check if your lender charges overpayment fees
- Some loans have annual overpayment limits
- Even £50–100 extra per month can make a big difference
Frequently Asked Questions
Should I overpay my mortgage?
If you have no higher-interest debt and an emergency fund, overpaying can save thousands. Check your lender’s terms first.
How much should I overpay?
Start with what you can afford—even small amounts help. Some aim for 1–2% of the loan per year.
Does overpayment reduce the term or the payment?
It reduces the term. Your monthly payment stays the same, but you’ll finish paying sooner.