07 / OFFSET MORTGAGE
Offset Mortgage Calculator
See how holding savings in an offset account reduces the interest you pay — and how much sooner you could be mortgage-free.
Mortgage Planning Cluster
Use this hub to move from the core repayment formula into affordability, offset, overpayment, and rent-versus-buy comparisons without leaving the mortgage cluster.
Mortgage Details
12% of mortgage
Results
Effective Mortgage Balance
£220,000
£30,000 offset
Monthly Payment
£1,390
Total Interest Saved
£52,499
by holding savings in offset account
Term Reduction
3y 1m
mortgage paid off earlier
Cumulative Interest Saved by Year
Y1
£1,378
Y5
£7,554
Y9
£14,945
Y13
£23,791
Y17
£34,378
Y21
£46,737
Y25
£52,499
Cumulative interest saved compared to standard mortgage
Cluster Hubs
Use these organising pages when you want the main calculators and supporting guides for this topic grouped in one place.
Related Calculators
Move sideways to closely related calculators without leaving the same topic cluster.
Use the Mortgage RepaymentMonthly payment, total interest, and full cost over any term.Use the Mortgage AffordabilityThe maximum you can borrow based on income, deposit, and stress test.Use the Mortgage OverpaymentInterest saved and years removed by paying extra each month.Use the Rent vs BuyLong-term financial outcome of renting against buying.
Related Guides
Use these supporting explainers when you need the formula, assumptions, or decision framing behind the numbers.
Read Offset Liquidity vs Interest Saved: What You Are Really Buying With FlexibilityClarifies the trade-off between retaining access to savings in an offset structure and locking that cash into permanent principal reduction.Read Offset Mortgage With GBP100,000 of Savings: A Worked ExampleShows how a larger offset cash balance changes mortgage interest and payoff speed, while also highlighting the opportunity cost of keeping a six-figure sum in a linked structure rather than elsewhere.Read Offset Mortgage With GBP50,000 of Savings: A Worked ExampleA practical offset scenario showing what 50,000 of linked savings can do to charged mortgage interest, payoff speed, and flexibility compared with leaving the cash separate.Read When Offset Accounts Beat Savings Accounts in the MathExplains when offset savings can outperform a standard savings account by reducing mortgage interest, and when liquidity or rate differences narrow the advantage.