Loan term calculator

Pay a little extra. Knock years, and tens of thousands in interest, off your mortgage.

Free and live-updating. Set your loan, rate and term, then add an extra repayment and watch how much sooner you're mortgage-free and how much interest you never have to pay.

Your loan
Minimum fortnightly repayment$1,750
You'd pay$1,850
Paying $100 extra per fortnight
4 years 4 months
off your mortgage, and $130k of interest you never pay. You'd be mortgage-free in 25 years 8 months instead of 30 years.
How much sooner you finish
Original term30 years
With extra repayments25 years 8 months
Total interest over the life of the loan
Minimum repayments only$764,624
With your extra repayments$634,153
Interest saved$130,471
Set up a faster-payoff plan with Tanta →
Estimates only, assuming a fixed rate held for the whole term. Check your bank allows extra repayments without penalty. Fixed loans often cap how much extra you can pay each year. Not financial advice; a guide to help you plan.
How this calculator works

Why a small extra repayment does so much.

Early in a mortgage, most of each repayment is interest and only a sliver chips at the principal. Every extra dollar you put in goes straight at the principal, which shrinks the balance every future repayment is calculated on. That compounding is why $100 a fortnight can wipe years off a 30-year loan. The calculator simulates the loan repayment by repayment, with and without your extra, and compares the two.

A few things to know

  • Fixed-rate loans usually limit extra repayments, often around 5% of the balance a year, or a set dollar cap, before a break cost applies. Floating portions and offset/revolving facilities are where extra payments are unrestricted.
  • It assumes one rate held flat for the whole term. Real rates move at each re-fix, so treat the saving as the shape of the win, not a guarantee to the dollar.
  • The same money in a revolving-credit or offset structure can do the same job while keeping the cash accessible. Which setup suits you is exactly the kind of thing worth a conversation.

Turn the saving into a plan

Structuring a loan so you can throw extra at it, without getting stung by fixed-rate limits, is one of the highest-value things a broker does. We'll map it out with you in a free initial chat.

Book an initial chat →