Retire Early vs Work Longer Calculator NZ

This calculator compares retiring now against working a few more years in New Zealand, showing how that decision changes the size of your nest egg and how long it will last. Working longer is one of the most powerful levers in retirement planning because it pulls three at once. Every extra year you keep earning, you can add more to your savings, your existing balance keeps compounding, and you trim a year off the drawdown you need to fund, so the money does not have to stretch as far. The combined effect is often far larger than the extra working time would suggest, turning a savings pot that runs short into one that comfortably lasts. You enter your current savings, how much you would contribute each year while still working, the return you expect, the number of extra years you are weighing up, and your annual spending in retirement, and the calculator shows the pot you would retire on each way and roughly how many years it would last at your spending level. For a clearer picture, use an after-inflation return and today's spending so everything is in current dollars, and remember NZ Superannuation sits on top of this from 65, easing the load on your own savings.

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Working 5 more years adds about 6 years of funded retirement
from your own savings, before NZ Super
Retire now: pot$400,000
Lasts13 years
Work longer: pot$569,892
Lasts19 years

Drawdown applies your return each year then your spending. Use an after-inflation return and today's spending. Excludes NZ Super. Estimate only, not advice.

How it works

For retiring now, the pot is your current savings. For working longer, it grows your savings by the return for the extra years and adds each year's contribution. The calculator then runs a drawdown on each pot, applying the return then subtracting spending each year, to estimate how many years the money lasts.

Worked example

With 400,000 dollars now, the pot might fund about 13 years at 40,000 dollars a year. Working 5 more years at 20,000 dollars of contributions and 3 percent growth could lift the pot to around 570,000 dollars and fund several years more again, beyond the 5 years you worked.

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Frequently asked questions

Why does working a few more years help so much?

It works three ways at once: you add more contributions, your existing savings keep growing, and you have fewer years of drawdown to fund. Together these can extend how long your money lasts far more than the extra working time alone.

Does this include NZ Super?

This tool focuses on your private savings and the spending they must cover. NZ Superannuation provides a baseline income from age 65 on top, which reduces how much your savings need to fund. Treat the result as your savings picture, not your total income.

Should I use a real or nominal return?

For a clearer view, use an after-inflation return and today's spending, so the figures are in current dollars. That avoids the illusion of growth that inflation can create.