Tested tool guide
Tested browser tools
Checked August 16, 2026
What Annuity Payout Calculator does, with a checked example
Annuities convert a lump-sum premium into future income two ways: growth during a deferral period, then conversion of the resulting balance into level payments. This tool models both steps for fixed, variable, and indexed contracts, applies any surrender-charge schedule against early withdrawals, estimates the death benefit payable if the owner dies before annuitizing, and layers in optional income-rider guarantees. The detail most people miss: the payout it shows is the gross contract amount before ordinary income tax on the growth portion, so the number that lands in a bank account will be smaller than the figure displayed.
Worked example
A concrete input and expected output from the current implementation.
Input
Premium: $100,000, Type: Fixed, Guaranteed rate: 3.5%, Deferral period: 10 years, Payout: 10-year period certain, annual payments
->
Expected output
Accumulated value after 10 years: $141,059.88. Annual payout: $16,961.23 for 10 years (total payments $169,612.30).
The $100,000 premium compounds annually at 3.5% for 10 years to $141,059.88 (100000 x 1.035^10), then that balance is annuitized into 10 equal end-of-year payments using the same 3.5% rate as the payout discount factor: $141,059.88 divided by a 10-year annuity factor of 8.3166.