Annuity Calculator

Find the periodic payment a principal can sustain.

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Understanding Annuity

The annuity calculator computes the future value of a series of equal payments made at regular intervals, which is essential for retirement planning, investment analysis, and understanding any financial product that involves recurring payments. Annuities come in many forms, from retirement income products sold by insurance companies to the regular contributions you make to a savings account or investment portfolio. This calculator helps you determine how much a stream of regular payments will be worth at a future date, given a specified interest rate and time period. Enter the regular payment amount, the interest rate per period, and the total number of periods to see the future value of your annuity. The results show both your total contributions and the interest earned, clearly demonstrating the growth achieved through regular investing. This is particularly powerful for retirement planning, where consistent monthly contributions to a retirement account over a working career can accumulate into substantial wealth through the combined effect of regular savings and compound growth. The calculator handles both ordinary annuities where payments are made at the end of each period and annuities due where payments are made at the beginning, which can make a meaningful difference in the final value. Use this free tool to model different savings scenarios and plan your financial future with confidence.

Practical Example

Formula: PMT = P × r / (1 − (1 + r)^−n) where P = principal, r = rate per period, n = periods. Example: $500,000 at 4% for 20 years ≈ $36,800/year.

Frequently Asked Questions

What is an annuity payment?

An annuity payment is a fixed amount paid at regular intervals (monthly, yearly) from a lump sum that earns interest over the payout period.

What's the difference between ordinary annuity and annuity due?

Ordinary annuities pay at the end of each period; annuities due pay at the beginning, which slightly increases their present and future value.

Are these projections guaranteed?

No — actual returns depend on the interest rate, fees, and provider; this is an estimate and does not include taxes.

What factors can affect my results?

Multiple factors influence financial calculations including interest rates, time periods, tax implications, fees, and inflation. Always consider these variables when planning and use conservative estimates for critical decisions.

How often should I recalculate?

Review your calculations whenever your financial situation changes significantly, or at least annually. Major life events like job changes, marriage, or market shifts warrant immediate recalculation.

Disclaimer: This calculator provides estimates for informational purposes only. Actual results may vary. Consult a qualified professional for personalized advice.

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