Immediate Annuity Definition The Immediate Annuity Calculator will calculate the payment for a single premium immediate annuity. Enter in the amount invested into the immediate annuity, the life expectancy of the annuitant (in number of years until the estimated date of death), the annual rate of return on the immediate annuity, and the payment frequency (monthly, annually, or quarterly). Get started using the free online single premium immediate annuities calculator now! Also, check out the Present Value Annuity Calculator on the site.

How to Calculate Immediate Annuity Let's be honest - sometimes the best immediate annuity calculator is the one that is easy to use and doesn't require us to even know what the immediate annuity formula is in the first place! But if you want to know the exact formula for calculating immediate annuity then please check out the "Formula" box above.