Spend some. Invest the rest.

Choose how much of your tax refund to set aside, and see what that one deposit could grow into by 70 at the S&P 500’s long-run average.

One deposit

Only the amount you set aside is invested. Nothing is added after it.
10% a year, compounded monthly

The same long-run average the S&P 500 calculator uses.
Until age 70

The projection runs from your age today to your 70th birthday. A blank age counts as 20.

Your refund

Enter your refund, or what you expect it to be.

Tax refund amount

Your total refund, or an estimate.

Age

Your age today.

How much of your refund do you want to save? 50%

Amount invested

Set by the slider. Type over it to use a different amount.

Projected value at 70

Past returns are not a guarantee of future returns.

How the math works

There are no contributions after the first, so the whole result comes from the amount you set aside and the number of years it has to compound.

Value at 70 = A × (1 + r)ⁿ

A: The amount invested: your refund times the share you chose, unless you typed a different amount.
r: 10% ÷ 12, the monthly rate.
n: (70 − your age) × 12, the number of months.

The result is rounded to the nearest dollar.

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