08 / OVERPAYMENT
Mortgage Overpayment Calculator
See the exact impact of paying a little extra each month — how much interest you save, and how many years come off your mortgage term.
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
Overpayment
£2,400 / year
Check your mortgage terms — many lenders allow up to 10% annual overpayment without early repayment charges.
Impact of Overpaying
Interest Saved
£38,458
Time Saved
5y 1m
New Term
19y 11m
vs original 25 years
Standard Total Interest
£166,874
With Overpayment
£128,416
Balance Comparison
Yr
Standard
Overpaying
Saved
Y1
£2,450
Y4
£10,497
Y7
£19,704
Y10
£30,240
Y13
£42,295
Y16
£56,089
Y19
£71,873
Standard balance
With overpayment
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 Offset MortgageHow savings reduce mortgage interest and shorten your term.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.
How Mortgage Repayment Calculations WorkUnderstand the amortisation formula behind monthly mortgage payments.How Mortgage Affordability Is AssessedSee how income multiples, outgoings, and stress tests shape borrowing power.How Offset Mortgages Actually WorkCompare offset savings against standard mortgage interest charges.Mortgage Overpayment: How Much Does It Save?Measure how extra payments reduce lifetime interest and term length.