What does 500 a month grow into?
Five hundred a month is a realistic figure for a lot of households, which makes it a useful benchmark. Over twenty-five years at 8% it becomes a six-figure sum with well over half of it coming from growth rather than deposits.
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Deposits versus growth
Over twenty-five years you deposit 150,000. The chart shows the balance climbing well above that line, and the donut shows exactly how the final figure splits between your money and the market's.
The crossover - the point where growth exceeds contributions - typically arrives somewhere between year twelve and year sixteen at these rates. After it, the portfolio is doing more work than you are.
Small increases, large effects
Raising the contribution to 600 a month is a 20% increase in effort and roughly a 20% increase in outcome. Adding ten years to the horizon is often worth more than doubling the deposit.
If your income rises, the cheapest way to improve the plan is to raise the contribution at the same moment, before the money becomes part of normal spending.
Frequently asked questions
How much is 500 a month after 20 years?
Around 295,000 at 8% with monthly compounding. Adjust the rate and years above for your own assumptions.
Is it better to invest monthly or as a lump sum?
Lump sums win on average because money is invested for longer, but monthly investing is what most people can actually do, and it removes the timing decision.
What should I invest in?
This tool models a rate of return, not a product. Low-cost diversified index funds are the common starting point, but the right choice depends on your situation and country.
Should I increase the amount over time?
Raising contributions with your income is one of the most effective changes available. Test it by raising the monthly figure and comparing results.
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