Finance

Annuity Payout Calculator

Convert a lump sum into an illustrative level payout over a fixed period and compare it with a zero-growth withdrawal. The calculator uses periodic payout = PV × r ÷ (1 − (1 + r)^−n). It returns more than one result so you can check the main answer against a useful secondary measure. The modeled payout exhausts the balance at the end of the selected term. Commercial annuity quotes also reflect mortality, guarantees, insurer expenses, taxes, and contract features.

Educational scenario only. Confirm rates, fees, taxes, contract terms, and eligibility with the relevant institution or adviser.

Last Updated: July 10, 2026

Calculate and compare

Use the number box for precision or the slider for fast scenario testing.

Starting lump sum$Amount available for payout.Annual net return%Return after assumed costs.Payout periodyearsFixed payout duration.Payments per year1 annual, 4 quarterly, 12 monthly.Desired ending balance$Balance reserved at term end.

Scenario results

Payment per period

$1,583.51

12 payments per year.

Annualized payout

$19,002.13

Periodic amount multiplied by frequency.

Total scheduled payouts

$475,053.16

Excludes the desired ending balance.

How the calculation works

Use consistent units and retain full precision until the final display step.

periodic payout = PV × r ÷ (1 − (1 + r)^−n)

Starting lump sum300000 $

Annual net return4 %

Payout period25 years

Payments per year12

Desired ending balance0 $

Worked example

Reproduce the displayed scenario, then change one assumption at a time.

Start with the displayed scenario

These values remain visible and editable, so the example can be reproduced.

Starting lump sum: 300000 $; Annual net return: 4 %

Apply the formula

Keep units consistent before substituting the inputs.

periodic payout = PV × r ÷ (1 − (1 + r)^−n)

Check Payment per period

12 payments per year.

$1,583.51

Assumptions behind the result

• Inputs use the units shown beside each control.
• The displayed formula is applied without hidden market or demographic data.
• Rounding occurs only for display; calculations keep full numeric precision.
• The modeled payout exhausts the balance at the end of the selected term.
• Commercial annuity quotes also reflect mortality, guarantees, insurer expenses, taxes, and contract features.

Mistakes that change the answer

• Mixing percentages with decimals or mixing incompatible units.
• Relying on a rounded intermediate value instead of the full result.
• Changing several assumptions at once instead of testing starting lump sum separately.

Questions about annuity payout calculator

What does the annuity payout calculator calculate?

Convert a lump sum into an illustrative level payout over a fixed period and compare it with a zero-growth withdrawal.

Can I verify the result by hand?

Yes. Use periodic payout = PV × r ÷ (1 − (1 + r)^−n) with the displayed inputs, then compare your answer with the first result card.

What is the main limitation?

Commercial annuity quotes also reflect mortality, guarantees, insurer expenses, taxes, and contract features.

What to calculate next

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Calculator methods and editorial structure reviewed July 11, 2026. Results are estimates; verify regulated rates, eligibility rules, and professional decisions with the cited primary source.