Monte Carlo Retirement Calculator Australia
Most retirement calculators assume average returns and a smooth line on the chart. Real retirement does not work that way. This tool replays 98 years of market history (1928–2025), runs Monte Carlo trials on the same inputs, and models Australian super, Age Pension, and sequence-of-returns risk in today's dollars.
Educational only — not financial advice. Use it to stress-test assumptions, then speak to a licensed adviser before changing contributions or drawdowns.
Prefer a ready-made couples example? Try a phased retirement sample
Web app for desktop and mobile browsers. No App Store download. Opens with an editable ASFA comfortable couple benchmark so you see charts immediately. Free Advanced runs first — upgrade only if you want unlimited runs.
What you get that a basic projection misses
A typical fund projection shows one path. The Advanced Calculator shows a distribution: worst historical start years, median sustainable income across rolling periods, Monte Carlo survival odds, and how withdrawal rules change the outcome. That matters when you are deciding whether a spending target survives a 1973-style sequence, not just whether it works on a 7% average.
You can model couples with different retirement ages (phased retirement), employment income until each partner stops, deeming and Age Pension tests, fees, asset mix, and fixed or dynamic withdrawal strategies — then compare methods on the same household inputs.
Monte Carlo vs historical backtesting (when they disagree) · Worst years to retire
How Monte Carlo and historical testing work here
The calculator runs two parallel tests on your inputs. Historical backtesting rolls your plan through every full-length window starting from 1928 (for example every 28-, 30-, or 34-year start that still fits the series through 2025) — so you see what would have happened if you retired into 1969, 1973, 2008, and so on. Monte Carlo runs many trials (1,000 by default) on the same inputs; each year of each trial draws one random historical year from that dataset, with replacement, and uses that year’s returns and CPI together. It is a historical bootstrap, not a draw from a fitted normal distribution.
Neither method predicts the future. Together they answer a narrower question: does this spending target look robust across bad timing, or only comfortable when markets cooperate early?
Wealth Collective referenced SuperCalc Pro's Monte Carlo and historical stress-testing explainer in its 2026 guide. See the guide
Phased retirement for couples with different ages
Most Australian couples do not retire on the same day. One partner may stop at 62 while the other keeps earning until 65 or 67. A calculator with one retirement date treats the household as if both balances and both incomes move in lockstep — which is rarely true once preservation age, employer SG, and Age Pension tests enter the picture.
Enable phased retirement in the retirement calculator to set each partner's retirement age, keep wages and SG until they stop, and stress-test the combined household through historical sequences and Monte Carlo. The built-in couple phased-retirement example loads with Partner A at 62 and Partner B working to 65 on $85,000.
Open retirement calculator (phased sample) →
Related reading: phased retirement calculator guide (2026).
Open the retirement calculator
Click below to open SuperCalc Pro Advanced with an editable ASFA comfortable couple benchmark already loaded. Change balances, ages, and income, then run Monte Carlo and historical tests.
Open retirement calculator →
Browser-based app — no download. Free Advanced runs first. Edit the benchmark scenario before you run your own stress test.
See pricing when you want unlimited runs.
Ready to stress-test your plan?
One path: open the retirement calculator, run free Advanced scenarios with your numbers, then upgrade only if you want unlimited runs and saved scenarios.
Pricing stays in the nav for comparison shoppers — not beside the first free click.
Common questions about this advanced calculator
- Can couples retire at different ages?
- Yes. Turn on phased retirement, set each partner's age and retirement date, and keep employment income until they stop. The engine runs one household simulation across the transition rather than adding two single-person results together.
- Is this giving me personal financial advice?
- No. It is an educational model. It does not know your full situation, tax position, or risk tolerance.
- Does a high “success rate” guarantee I’ll be fine?
- No. A 95% Monte Carlo success rate still means 5% of simulated paths failed under the stated assumptions. Historical backtests can disagree with Monte Carlo depending on how paths are generated — check both.
- Can I use this instead of speaking to an adviser?
- No. Use it to prepare better questions for a licensed financial adviser, not as a substitute.