Annuity Calculator
Calculate the future value, present value, or periodic payment of an annuity. Plan your retirement income and investment strategy with precision.
Annuity Details
What Is an Annuity?
An annuity is a series of equal payments made at regular intervals over a specified period. Annuities are foundational in finance — they describe everything from retirement savings contributions and pension payouts to loan repayments and insurance premiums.
There are two main types:
- Ordinary Annuity: Payments occur at the end of each period. Most loans and retirement contributions work this way.
- Annuity Due: Payments occur at the beginning of each period. Rent payments and insurance premiums are common examples.
How to Use This Calculator
- Choose what to calculate: Future Value tells you how much you'll have, Present Value tells you what future payments are worth today, and Payment Amount tells you what to invest per period.
- Periodic Payment: The amount you contribute (or receive) each period. Even small regular payments compound significantly over time.
- Interest Rate: The annual rate of return. Equity-oriented portfolios may return 8-10%; debt or fixed-income may return 5-7%.
- Number of Years: Duration of the annuity. Longer periods allow the power of compounding to dramatically grow your money.
- Payment Frequency: How often payments are made. Monthly compounding produces slightly more than annual for the same rate.
- Annuity Type: Choose "Due" if payments are at the start of each period (like rent), or "Ordinary" for end-of-period payments (like most investments).
Annuity Formulas
Two core formulas govern annuity calculations:
For an Annuity Due, multiply the result by (1 + r) since each payment earns one additional period of interest.
Practical Example
Suppose you invest ₹10,000/month at 8% annual return for 20 years. Using the Future Value formula:
Your total contributions would be ₹24,00,000 (240 payments × ₹10,000). However, thanks to compound interest, your corpus would grow to approximately ₹52,50,000 — meaning you earned ₹28,50,000 in growth, more than doubling your contributions!
Starting just 5 years earlier (25 years total) would yield about ₹78,00,000 — an extra ₹25,50,000 from only ₹6,00,000 more in contributions. This demonstrates the power of compounding over time.
Annuity FAQ
What's the difference between ordinary annuity and annuity due?
+An ordinary annuity makes payments at the end of each period (like most retirement contributions), while an annuity due pays at the beginning (like rent). Annuity due yields slightly more for the same rate because each payment has one extra period to compound.
How does payment frequency affect the result?
+More frequent payments (monthly vs. annually) result in slightly higher future values because interest compounds more often. Monthly contributions of ₹10,000 grow more than a single annual payment of ₹120,000 at the same annual rate.
What interest rate should I use?
+Use the expected annual return for your investment type: stock market index funds average 7-10% historically, bonds 3-5%, savings accounts 3-5%, and money market funds 4-5%. Use a conservative estimate for planning to be safe.
When would I use Present Value vs Future Value?
+Use Future Value when saving toward a goal (retirement, education). Use Present Value to determine the lump sum equivalent of a series of future payments — for example, comparing a pension annuity to a lump-sum buyout offer.
Does this account for taxes and inflation?
+This calculator uses nominal values. To account for inflation, subtract the expected inflation rate (~2-3%) from your interest rate. For tax considerations, use the after-tax return rate, or consult a financial advisor for tax-advantaged accounts like 401(k) or IRA.