A worked example
Starting with $5,000 and adding $300 a month at a 6% annual rate, compounded monthly, grows to roughly $155,160 after 20 years — of which $77,000 was actually deposited.
Frequently asked questions
Is this the same math as the Compound Interest Calculator?
Yes, the underlying math is the same — regular deposits compounding over time. This page is framed specifically around annuity accumulation, with the payout phase covered separately in the Annuity Payout Calculator.
What rate should I use for an actual insurance annuity?
Use the rate quoted in your specific contract — fixed annuities specify a guaranteed rate, while variable and indexed annuities have more complex, sometimes capped, return formulas that this simple growth model won't fully capture.
Does this account for annuity fees?
No — insurance annuities often carry mortality and expense charges, rider fees, and surrender charges that reduce the effective return below the stated rate. Check your contract's net rate after fees for an accurate projection.
This calculator provides estimates for general informational purposes only and is not financial advice. Actual annuity contracts vary widely in structure, fees and guarantees — review your specific contract terms.