Offset Mortgage Calculator UK
Estimate how linked savings could reduce the mortgage balance charged interest.
Offset calculator
Balance charged interest
£—
Monthly interest reduction
£—
This is a simple interest estimate. It does not compare offset product rates, fees, tax treatment or lost savings interest.
Get a personalised quoteHow offset assumptions work
The calculator subtracts linked savings from the mortgage balance before estimating monthly interest. Product rules vary and some borrowers may prefer a lower standard mortgage rate or a different savings arrangement.
Your home may be repossessed if you do not keep up repayments on your mortgage.
Frequently asked questions
Does an offset mortgage reduce the mortgage balance? +
No. Savings are usually linked to reduce the balance charged interest. The mortgage balance remains due unless repayments reduce it.
Do I earn interest on offset savings? +
Offset savings commonly do not earn separate savings interest while they are offset. Tax treatment and product rules can vary.
Is an offset mortgage suitable for everyone? +
No. Suitability depends on savings level, rate, fees, access needs and wider circumstances. This page is not personalised advice.
Helpful next pages
Calculator-led mortgage planning
UK Mortgage Calculators is centred on practical estimation tools. The pages help you model cautious scenarios before you decide whether to request a broker or adviser callback.