Calculator
Lump sum calculator
A bonus, a tax return, an inheritance, sale proceeds: one-off money deserves a deliberate decision. This tool models what a single payment, made in a chosen year, does to your loan’s interest and length.
Timing matters more than most people expect, and so does what the loan looks like around the payment. A lump sum into a poorly structured loan is a missed opportunity; the pay-it-off-faster guide covers how the levers combine.
Interest difference in this scenario
$97,832
Time difference
2 yrs 10 mths
Estimates for general guidance only, using simplified assumptions and your inputs. Not advice, not a quote and not a prediction of your actual loan.
Deciding between the loan and other uses for the money crosses into personal advice territory: we handle the loan side, your adviser handles the rest.
Lump sum questions
When does a lump sum have the most effect?
The earlier in the loan it lands, the longer the reduced principal works for you. The same dollars late in a loan buy less interest relief, which the calculator shows clearly if you move the year slider.
Should a windfall go into the loan, offset or elsewhere?
It depends on your goals, tax position and what the money might be needed for later. The loan is rarely the only option, and sometimes not the best one. That is a planning conversation, and for parts of it, an adviser or accountant matter more than a broker.
Do fixed loans allow lump sums?
Often only up to a capped amount per year without break costs. If a windfall is coming, that is worth knowing before you fix. General information only.
Is this calculator advice?
No. It is general modelling from your inputs with simplified assumptions, not advice or a prediction of your actual loan.
Windfall on the way?
A 15-minute chat before it lands means the money goes where it works hardest for you.