Annuity Calculator
The Annuity Calculator is intended for use involving the accumulation phase of an annuity and shows growth based on regular deposits. Calculate the future value of your regular contributions and visualize your investment growth over time.
Annuity Calculator
Modify the values and click the Calculate button to use
Results
- End balance
- $0.00
- Starting principal
- $20,000.00
- Total additions
- $0.00
- Total return/interest earned
- $0.00
Accumulation Schedule
| Year | Addition | Return | Ending balance |
|---|
What is an Annuity?
An annuity is a financial contract that offers a series of payments over time, often used as a retirement strategy to create a steady income stream. It involves making regular deposits during an accumulation phase, which then grow with interest.
The accumulation phase is the period during which you build the value of your annuity through regular contributions and compound growth. This calculator helps you visualize how your annuity will grow over time based on your principal amount, regular additions, and expected growth rate.
Types of Annuities
Fixed Annuities
Provide a guaranteed rate of return for a specified period. They offer stable, predictable growth and are generally considered lower risk.
Variable Annuities
Invest your contributions in a selection of funds, similar to mutual funds. Returns depend on the performance of the underlying investments and can fluctuate.
Indexed Annuities
Offer returns based on the performance of a market index, such as the S&P 500, usually with a minimum guaranteed rate and a cap on maximum returns.
Ordinary Annuity vs. Annuity Due
Ordinary Annuity
Payments are made at the end of each period. Examples include bond interest payments or standard loan payments.
Annuity Due
Payments are made at the beginning of each period. Examples include rent payments or insurance premiums paid in advance.
The timing of payments affects the future value, as payments made earlier (annuity due) have more time to earn interest and therefore result in a higher end balance.
Annuity Calculation Formulas
For an ordinary annuity (payments at end of period), the future value formula is:
Where: PMT = payment amount per period, r = interest rate per period, n = number of periods
For an annuity due (payments at beginning of period), the future value formula is:
The formula for an annuity due includes an additional (1+r) factor, reflecting the extra period of interest earned on each payment.
Annuity Growth Examples
Retirement Contributions With Annual Deposits
A saver starts with an initial $20,000 and adds $10,000 at the beginning of every year for 8 years at a 5.5% annual return.
Setup: Beginning-of-period annual contributions with a moderate long-term growth rate.
Result: The ending balance grows faster than a comparable ordinary annuity because each deposit compounds for an extra period.
If you can contribute earlier in each cycle, even the same deposit schedule can produce noticeably more value over time.
Monthly Saving Plan for a Mid-Term Goal
An investor contributes a starting principal plus fixed monthly additions while tracking how recurring deposits and compounding work together.
Setup: Monthly deposits paired with a multi-year time horizon.
Result: Regular additions become a major share of total growth, especially once contributions stay consistent for several years.
The calculator is useful for seeing whether a savings plan depends more on contribution discipline or on the return assumption.
Tips for Maximizing Your Annuity Growth
- Start early to take advantage of compound growth over a longer period.
- Make regular contributions to steadily build your annuity value.
- Consider the impact of fees on your returns when choosing an annuity provider.
- Understand the difference between ordinary annuities and annuities due, and how payment timing affects growth.
- Balance your portfolio with a mix of annuities and other investments based on your risk tolerance and financial goals.
How to Use Our Annuity Calculator
- Enter your starting principal amount (if any).
- Input your regular addition amounts (annual and/or monthly).
- Select whether payments are made at the beginning or end of each period.
- Enter the expected annual growth rate.
- Specify the time period in years for your calculation.
- Click 'Calculate' to see your results and accumulation schedule.
This calculator helps you understand how your regular contributions will grow over time, allowing you to plan effectively for your financial future.
Annuity Calculator FAQs
What is the difference between an annuity calculator and an annuity payout calculator?
This annuity calculator focuses on the accumulation phase, helping you estimate how deposits grow over time. An annuity payout calculator focuses on the withdrawal or income phase after the balance has already been built.
Why does an annuity due end with a higher balance than an ordinary annuity?
An annuity due assumes payments happen at the beginning of each period, so every contribution has one extra period to earn returns. That earlier timing is why the future value is higher when all other inputs stay the same.
Should I use annual additions or monthly additions?
Use the input pattern that matches how you actually save. Annual additions are useful for bonus-based or lump-sum contributions, while monthly additions are better for paycheck-based savings plans.
Does this annuity calculator include taxes and fees?
No. The calculator is designed to model growth from contributions and return assumptions. If your annuity product includes fees, surrender charges, or taxes, adjust your expected growth rate to reflect those costs.