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Mortgage Overpayment Calculator for Derbyshire and the UK
See how much interest you could save by paying extra off your mortgage, and how much sooner you could be mortgage free. Try a monthly overpayment, a one-off lump sum or both. Based in Pride Park, Derby, we help homeowners across Derbyshire and the UK.
★★★★★ Rated 5 stars on Google | FCA Regulated (Ref: 706676) | Local, Derby-Based Advice | Call 01332 300300
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Leave your number and a Derby-based adviser will call you back, usually within one working day.
YOUR HOME MAY BE REPOSSESSED IF YOU DO NOT KEEP UP REPAYMENTS ON YOUR MORTGAGE
Work Out What Overpaying Could Save
Answer four questions. The notes next to each box explain what to enter and why it matters.
How this calculator works
We compare your mortgage as it is now with the same mortgage plus your overpayments. The figures assume your rate stays the same for the rest of the term. Most lenders let you overpay up to 10% of the balance each year without a charge.
Reviewed by Suzanne Bradshaw, Director, Mortgage & Finance Arena. Last updated September 2026.
You could save
£0
Mortgage free
0
Interest without overpaying
£0
Interest with overpaying
£0
See how your balance falls each year
| Year | Balance without overpaying | Balance with overpaying | Difference |
|---|
Deal ending soon?A lower rate could save you more than overpaying. Check your monthly payment on a new rate.
Try the Repayment CalculatorWant Help Paying Your Mortgage Off Sooner?
We can check whether a new deal with a lower rate or better overpayment terms would save you more. Leave your details and a Derby-based adviser will call you, usually within one working day.
Guide only. Not a quote, offer or recommendation.
What to Know Before You Overpay
Check Your Allowance
During a fixed or tracker deal, most lenders let you overpay up to 10% of the balance each year. Paying more can mean an early repayment charge.
Keep a Safety Net
Build up emergency savings and clear costly debts, such as credit cards, before you overpay. Money paid into your mortgage is hard to take back out.
Compare With Saving
If a savings account pays more after tax than your mortgage rate, saving may earn you more. You could then pay a lump sum when your deal ends.
What £100 a Month Could Save
| Rate | Interest saved | Time saved |
|---|---|---|
| 4% | £18,020 | 3 years 5 months |
| 5% | £24,505 | 3 years 6 months |
| 6% | £32,021 | 3 years 8 months |
Based on a £200,000 repayment mortgage over 25 years.
Ways to Overpay
| Method | How it works |
|---|---|
| Regular | A fixed extra amount each month by standing order or online. |
| Lump sum | A one-off payment, such as a bonus or inheritance. |
| At remortgage | Pay money off when your deal ends, when there is often no limit. |
Derby office
Local Advice in Derbyshire
Our advisers work from Pride Park in Derby. We help homeowners across the county find deals with low rates and flexible overpayment terms.
Areas we cover
- Derby
- Belper
- Ripley
- Heanor
- Ilkeston
- Long Eaton
- Swadlincote
- Alfreton
- Matlock
- Ashbourne
- Chesterfield
- Buxton
Across the UK
Advice Across the UK
Not in Derbyshire? We arrange mortgages across the UK by phone and video call, with the same service and support.
Call us on 01332 300300
Book a Phone or Video CallMortgage Overpayment FAQs
Most lenders allow up to 10% of your balance each year during a fixed or tracker deal. Some allow more, and many have no limit on their standard variable rate. Check your mortgage offer.
Compare your mortgage rate with what savings would earn after tax. If your mortgage rate is higher, overpaying usually saves more. Keep an emergency fund either way.
It depends on your lender. Some lower your monthly payment and keep the same end date. Others keep the payment the same and shorten the term. You can often choose.
Earlier is better, because interest is charged on a larger balance at the start. Overpaying when your deal ends can also work well, as limits often do not apply then.
Usually not. Some flexible mortgages let you borrow back what you have overpaid, but many do not. Ask your lender before you pay a large sum.
Yes. A lower balance means a lower loan to value, which can open up better rates when you remortgage.
Have a Question? Get in Touch
Prefer to tell us more about your plans first? Send us a message and a Derby-based adviser will get back to you directly.
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Want Advice Based on Your Own Circumstances?
Speak to one of our advisers for a personal recommendation, not just a guide figure.
Your home may be repossessed if you do not keep up repayments on your mortgage. This calculator gives a guide only and is not a personal recommendation. It assumes your rate stays the same for the rest of the term and does not include fees or early repayment charges. Check your lender’s overpayment rules before you pay extra. Mortgage & Finance Arena Ltd is authorised and regulated by the Financial Conduct Authority (FCA No. 706676).