Future Value Calculator

How it works

Future value of a lump sum

Set Regular contribution to 0 to project a single amount. For example, 10,000 at 5% compounded annually for 10 years becomes 16,288.95 before tax, fees and inflation. Enter a regular contribution to include recurring deposits. The future balance is an amount in future money; use the inflation assumption to also estimate its purchasing power.

Reading a future value projection

Future value translates today's balance and planned contributions into a modeled ending amount. It is sensitive to the time horizon, return assumption, and timing of deposits. Compare several plausible inputs rather than interpreting a single projection as a promised balance. Unless the selected calculation explicitly adjusts for inflation, the result is an amount in future money rather than today's purchasing power.

Guides

• Compounding, contributions, and the time between them

  Learn how rates, contribution timing, inflation, and taxes change a savings projection.

Savings growth: formula and assumptions

Each period: balance grows at the equivalent periodic rate, then a contribution is added (or added first for beginning-of-period deposits).

Returns and inflation are assumptions held constant. Annual taxes on positive interest are deducted at year end.

Monthly + annual contributions: formula and assumptions

Ending balance = opening growth + each contribution grown from its event time − modeled interest tax.

The annual stream is additional to twelve monthly contributions. Increases apply separately to each stream. Tax settles at year ends and the final partial year; inflation adjusts purchasing power.

Worked example

Reference example currency: USD. These fixed examples do not change with your calculator preferences.

Using the Savings growth example:

Starting amount ($)

10000

Regular contribution ($)

200

Contribution frequency

Monthly

Nominal annual return (%)

7

Time horizon (years)

10

Compounding per year

Monthly

Contribution timing

End of each period

Tax rate on annual interest (%)

0

Annual inflation assumption (%)

0

Each period: balance grows at the equivalent periodic rate, then a contribution is added (or added first for beginning-of-period deposits).

Example result

These are illustrative inputs. Change the values to explore a different scenario.

What to keep in mind

Projected returns are hypothetical. Actual returns, fees, tax treatment, and deposit terms may differ.

Formula references

• CFPB: understanding mortgages (opens in a new tab)
• Investor.gov: financial tools and calculators (opens in a new tab)

References explain the underlying methods; they do not imply endorsement or individual professional review of Finflo.

Common questions