I’m Charles Calvert, a mortgage broker at Easy Mortgages. This is general information, not personal advice. Always check the figures against your own situation before you decide anything.
Is overpaying your mortgage worth it? Plenty of Hampshire homeowners ask me this once they have a bit of spare cash each month. In September 2023, with mortgage rates still elevated after the rises of the past year, the interest you can save by overpaying is often more meaningful than it felt when rates were at historic lows — but that does not mean every spare pound should go on the mortgage.
Overpaying can cut interest and shorten the term. It can also leave you short if the boiler dies or income dips. Here is the plain-English version.
How overpayments usually work
Most residential deals let you overpay up to a set percentage of the outstanding balance each year — often around 10% — without an early repayment charge. Go above that limit on some products and ERCs can apply. Always check your offer letter or ask your lender before you send a large lump sum.
Overpayments typically reduce the balance the interest is charged on. Depending on how your lender applies them, that can mean lower monthly payments later, a shorter term, or both. Ask which option you are choosing; do not assume.
When overpaying often helps
- You have a solid emergency fund already (many people aim for three to six months’ essential costs).
- Your mortgage rate is higher than what you earn on easy-access savings after tax.
- You value being mortgage-free sooner more than keeping a large cash buffer.
- You are comfortable locking money into the property rather than keeping it liquid.
With pay rates for many new deals sitting well above the ultra-low fixes of a few years ago, the “rate versus savings” comparison has shifted for a lot of households this year. Run the numbers on your actual rate, not a newspaper example.
When holding cash can win
If your rate is still low because you fixed earlier, and savings rates have improved, the interest you earn on cash can beat the interest you save by overpaying — especially if you might need the money. Offset mortgages are a different tool for the same idea: your savings stay accessible while reducing the balance you pay interest on.
Debt with higher interest than your mortgage — such as some credit cards or personal loans — usually deserves attention before extra mortgage payments. That is a general observation, not a recommendation for your case.
Watch the ERC trap
Some older or special products have tighter overpayment rules. Large “gifted” lump sums from family can also raise questions if they arrive just before a remortgage. Tell me before you move big sums so we do not trip source-of-funds checks later.
If your fix is ending in the next few months, check whether overpaying now and remortgaging shortly afterwards still fits — sometimes the cash is better held for fees, or for a slightly larger deposit-style reduction that improves the LTV band on the new deal.
A practical next step
Find your annual overpayment allowance and remaining ERC period. Then decide whether spare cash should go to the mortgage, savings, or other debts. If you want a second pair of eyes on your current deal’s rules, send me the offer summary and I will talk it through with you. There is no fee for that conversation; if we later arrange a remortgage, my fee is £299 on full mortgage offer.
Lump sum vs monthly overpay
A one-off bonus, inheritance or sale proceeds can be paid as a lump sum within your annual allowance. Regular monthly overpays suit people with steady surplus income. Some lenders want you to tell them which you are doing so they apply the reduction correctly. Silence can mean the money sits as a credit without changing the schedule the way you expected.
If you are inside a fixed deal with a 10% annual allowance, spreading a large gift across two calendar years of allowance can avoid ERC — but only if the product rules measure the allowance that way. Check before you plan a family transfer around Christmas and the new year.
Talk it through before you move the money
Hampshire homeowners sometimes overpay heavily just before a remortgage, then wish they had kept cash for fees or for a cleaner LTV band. A fifteen-minute review of your end date, ERC and spare cash usually prevents that. There is no fee for the chat.
If you would like to talk this through for your own numbers, you can get in touch here or email contact@easy-mortgages.co.uk. I am based in Fareham and help clients across Hampshire.