Offset mortgage calculator
Offset mortgage
Estimate mortgage interest saved by linked savings.
Estimate offset-mortgage benefit
Illustrative The amount currently owed on the mortgage, before any new fees or planned overpayments.
£
The annual mortgage interest rate used in this illustration.
%
How long is left to repay the mortgage capital.
years
Explains how this input is used in this illustrative mortgage calculation. Check your mortgage offer or other source document for the exact figure.
£
Savings movements and comparison ⌄
Explains how this input is used in this illustrative mortgage calculation. Check your mortgage offer or other source document for the exact figure.
£
Explains how this input is used in this illustrative mortgage calculation. Check your mortgage offer or other source document for the exact figure.
£
Explains how this input is used in this illustrative mortgage calculation. Check your mortgage offer or other source document for the exact figure.
%
This estimates interest that could have been earned if the linked savings instead stayed in an ordinary savings account. Tax is not included.
Mortgage interest saved
£52,499
Term reduced by3 years 1 months
Foregone savings interest£23,013
Net benefit£29,487
Linked savings at end: £30,000Your savings are modelled separately from the mortgage and remain accessible, subject to your mortgage provider’s account terms.
Assumptions and limits⌄
This illustration assumes the offset balance changes monthly and the mortgage rate stays unchanged. Product fees, tax on savings interest, account restrictions and lender-specific payment recalculation rules are excluded.
Offset versus no offset
Interest comparison
| Scenario | Mortgage interest | Term / payment | Linked savings |
|---|---|---|---|
| No offset | £166,874 | £1,390 / month | — |
| With offset | £114,375 | 263 months | £30,000 |
| Difference | £52,499 saved | 37 months sooner | £23,013 alternative interest |