Compare offsetting savings against mortgage interest and fees.
Estimate how much mortgage interest an offset account could save, how much sooner the mortgage could be repaid, and whether forgone savings interest or fees change the result.
Useful for cash-rich borrowers
Offset mortgages can reduce interest while keeping savings accessible, but you may give up savings interest or pay fees.
Estimated net benefit
£51,363
After estimated offset fees and savings interest forgone.
Inputs
Offset details
Estimate
Results
Estimated mortgage interest saved
£76,783
Time saved: 4 years 6 months
Offset balance used
£40,000
Standard payment
£1,403
Savings interest lost
£22,960
Offset fees
£2,460
Assumes the same monthly mortgage payment and a constant savings balance in the offset account.
Trade-off
What the offset is really worth
Net benefit
£51,363
Monthly benefit
£209
Offset term
20 years 6 months
Before choosing offset
Check the details
Compare the offset mortgage rate against standard mortgage deals.
Check whether your savings could earn more after tax elsewhere.
Confirm fees, minimum savings requirements, and how quickly savings can be withdrawn.
Important disclaimer
This calculator provides estimates only and does not constitute financial advice. Offset mortgage products, rates, fees, savings access, tax treatment, and repayment rules vary by lender and by personal circumstances.