--- title: "FIRE Calculator: Your FIRE Number and Years to Retire Early (NZ)" url: https://decisionscalc.com/nz/tools/fire-calculator/ description: "Your FIRE number with the 4% rule, your years to financial independence, and how your savings rate and Social Security change them. Free. NZ figures in $." publisher: DecisionsCalc note: General information, not financial, tax or legal advice. Figures name their source and the date they were read. --- [NZ · figures as of 2026-11](https://decisionscalc.com/methodology/) Figures checked 7 Nov 20261 figure in our [register](https://decisionscalc.com/methodology/#figure-register)Next review 1 Jul 2027[Report an error](mailto:hello@decisionscalc.com?subject=Possible%20error%20on%20%2Fnz%2Ftools%2Ffire-calculator%2F) Career Decisions # FIRE Calculator Calculate your FIRE number, years to financial independence, and how NZ Super changes your target. Based on the 4% safe withdrawal rate from the Trinity Study. ### FIRE Scenarios & Projections ## Your savings rate sets the date, not your salary The finding that makes early retirement arithmetic surprising is that the years to financial independence depend almost entirely on the **share of income you save**, not the amount. Saving 10% of your income takes roughly fifty years from zero; 25% takes about thirty; 50% takes about seventeen; 65% takes around ten. The reason is that every extra point of savings rate works twice. It raises the amount going in and lowers the spending the pot eventually has to support. A raise you spend moves the date barely at all; a raise you save moves it twice. ## Where the 4% rule came from, and what it assumed The 4% figure comes from studies of historical US market returns, asking what withdrawal rate would have survived every thirty-year window including the worst. It is a useful anchor and a poor law. Three assumptions matter. It was derived from **US** returns, which were among the best of the twentieth century; the same test on most other markets gives a lower safe rate. It was tested over **thirty years**, so retiring at forty asks it to do something it was never tested for. And it assumes a portfolio heavily weighted to equities, held through the crashes without flinching. Retiring early on a long horizon, many people work from 3.25–3.5% instead, which is the difference between needing 25 and 30 times your spending. Adjust the withdrawal rate above and watch the target move — it is the most consequential input on the page. ## Sequence risk is the thing that actually breaks plans Two retirements with identical average returns can end very differently depending on *when* the bad years arrive. A crash in the first five years, while you are selling assets to live on, does damage that later good years cannot undo. The same crash twenty years in is survivable. This is why a cash buffer of one to three years' spending matters more than its modest return cost suggests. It lets you avoid selling into a fall, which is the mechanism by which sequence risk does its harm. ## What this model simplifies - **Returns are steady here; real ones are not.** A smooth line gives a single date where reality gives a range. - **Tax is not modelled.** Where your money sits — pension, tax-advantaged account, or ordinary brokerage — changes both what you accumulate and what you can reach before pension age. - **State and workplace pensions are separate.** They start later, which is why many plans need a larger bridge to pension age and a smaller pot after it. - **Health cover.** In countries without universal coverage this is one of the largest line items in an early retirement, and the gap before state eligibility is the expensive part. **Data sources & methodology:** FIRE number = annual expenses ÷ withdrawal rate. Years to FIRE computed by projecting portfolio growth at stated real return until it exceeds the FIRE number. NZ Super reduces the FIRE number by capitalizing that annual income. Based on the Trinity Study (Bengen 1994) and subsequent research. Past market returns do not guarantee future results. See how your contributions grow with our [compound interest calculator](https://decisionscalc.com/nz/tools/compound-interest-calculator/), or read how to [bridge to pension-access age](https://decisionscalc.com/articles/early-retirement-pension-bridge/) if you plan to retire early. [Disclaimer →](https://decisionscalc.com/disclaimer/) ## What changes in New Zealand - **NZ Super is paid from 65 and is not means-tested**: what you earned or saved does not reduce it. From 1 April 2026 a single person living alone gets **$1,294.74 a fortnight before tax** ($1,110.30 after tax at the M code); each partner in a couple gets $984.28. - Eligibility depends on **residence, not contributions**: you generally need to have lived in New Zealand for a set number of years after age 20, so recent arrivals should check before counting on it. - **KiwiSaver is locked until 65** except for a first home, serious hardship, serious illness or permanent emigration, so an early retirement has to be bridged from savings held outside it. - New Zealand has no general capital gains tax. Managed funds are usually **PIEs taxed at your prescribed investor rate (10.5%, 17.5% or 28%)**, and offshore shares costing over $50,000 fall under the foreign investment fund rules. **Data reference (New Zealand):** Work and Income: NZ Super rates from 1 April 2026 ($1,294.74/fortnight gross, single living alone ≈ $2,805/month) · figures as of 2026-11 · NZ Super rate read on 2026-11-03 against the named source. The other inputs are example values for you to change, not New Zealand data. General information, not advice.. See our [methodology](https://decisionscalc.com/methodology/) for how every figure is sourced and dated. ## Get an email when New Zealand rules change Tax bands, allowances and benefit rates change every year. We email you when a rule our New Zealand calculators use changes, usually a few times a year. Confirm by email; unsubscribe in one click. Was this page useful? **Report a wrong figure or missing information**