Your financial-independence number and the years to reach it.
Years to financial independence
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FIRE number
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Annual safe income
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Your breakdown
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What financial independence actually means
Financial independence is the point where your investments can cover your living costs without you working. The movement built around it, often shortened to FIRE, turns that into a target you can calculate. The core idea is the 4 percent rule: if you can live on withdrawals of about 4 percent of your portfolio each year, your money should last through a long retirement. Flip that around and your independence number is your annual expenses divided by 4 percent, which is the same as 25 times what you spend in a year. This calculator works out that number for you and then projects how many years it takes to get there from where you are now, given your current investments and what you save each year.
Why you must use a real return
The single most important input is the return field, and it asks for a real return, meaning after inflation. This matters because your independence number is stated in today's rand. If you used a nominal return of, say, 10 percent, your portfolio would hit the rand target faster, but inflation would have quietly raised your actual cost of living in the meantime, so you would arrive at a number that no longer buys what it used to. By growing the portfolio at a real return, around 6 percent is a common assumption for a growth-tilted South African portfolio, the target and the projection stay in the same money. There is no SARS tax rate driving this tool, but tax does shape the real return you can realistically use, because the 40 percent capital gains inclusion and 20 percent dividends tax eat into returns held outside a tax-free savings account or retirement fund.
R400,000 a year, starting from R1 million
Run the defaults. You spend R400,000 a year, so your independence number is R400,000 divided by 4 percent, which is R10,000,000. You already have R1,000,000 invested and you add R200,000 of savings each year, growing everything at a 6 percent real return. The calculator adds your savings, grows the balance, and repeats year by year until the balance reaches R10 million. That takes 19 years, by which point the portfolio has grown to roughly R10,182,718, just past the target. At that point a 4 percent withdrawal gives you R400,000 of safe annual income, which is exactly the spending you started with.
The savings rate is the real lever
People obsess over investment returns, but for someone still building toward independence the savings rate moves the date far more. Push the annual savings up and the years tumble, because early contributions have the longest time to compound and because a higher savings rate usually means lower expenses, which also lowers the target. The relationship is not linear: doubling your savings does not halve the years, but it pulls the date in sharply. Try nudging the savings field and watch the years respond more dramatically than they do to the return field. That is the honest lesson of the FIRE maths, spend less and save more does double duty.
Where the 4 percent rule needs caution
The 4 percent rule comes from US market history, and South African investors should treat it as a guideline rather than a guarantee. Local inflation has been higher and more volatile, currency moves affect offshore holdings, and a long retirement raises the risk of a bad sequence of returns early on. A more conservative withdrawal of 3.5 percent, which lifts your target to roughly 28 or 29 times expenses, gives a margin of safety. The common mistake is forgetting that retirement annuity money is locked until age 55 and taxed on the way out, so a portfolio that looks ready on paper may not all be accessible yet. Use this tool to set the direction, then pressure-test the withdrawal rate and the accessibility of each pot before you hand in your notice.
Should I count my retirement annuity in my FIRE number?
Count it, but remember the access rules. Retirement annuity savings cannot normally be touched before age 55, so if you want to stop working earlier you need a separate pot of discretionary investments and tax-free savings to bridge the gap until the annuity unlocks. Many South African early retirers run two timelines: a bridge portfolio for the years before 55 and the retirement funds for after. The calculator treats all your investments as one pool, so adjust mentally for what is actually reachable.
Does the calculator account for tax on my withdrawals?
No, it works in pre-tax terms and assumes the 4 percent withdrawal covers your expenses. In reality, withdrawals from a living annuity are taxed as income and capital gains apply to discretionary investments, so your gross withdrawal needs to be a little higher than your spending to leave the right amount after tax. Building a slightly larger target, or using tax-free savings for part of your income, helps close that gap.