Annuity Calculator
Payment, PV & FV
Calculate how much your annuity will pay, how much lump sum you need for a desired income, or how much a lump sum will grow. Supports monthly, quarterly, and annual payment frequencies.
Calculate how much a lump sum grows over time.
What Is an Annuity?
An annuity is a contract between an individual and a financial institution (typically an insurance company) in which the individual pays a lump sum or series of premiums in exchange for regular income payments. Annuities are one of the most widely used tools in retirement planning because they can provide guaranteed income for a fixed term or even for life.
The core value proposition of an annuity is certainty: unlike market investments whose returns fluctuate, a fixed annuity guarantees a specific payment amount regardless of market conditions. This makes annuities particularly valuable for retirees who want predictable monthly income to cover essential living expenses.
Annuities come in many forms — immediate vs. deferred, fixed vs. variable, term-certain vs. life. Our annuity calculator models the fundamental mathematics common to all annuity types: the relationship between a lump sum, interest rate, payment frequency, and payment period.
Annuity Formulas Explained
Three core annuity calculations cover most planning scenarios:
Future Value (Lump Sum Growth):
FV = PV × (1 + r/freq)^(n × freq)
Present Value (Lump Sum Needed for Desired Payments):
PV = PMT × [1 − (1 + r/freq)^(−n×freq)] / (r/freq)
Payment Amount (Income from Lump Sum):
PMT = PV × (r/freq) / [1 − (1 + r/freq)^(−n×freq)]
Where: PV = Present Value (lump sum today), FV = Future Value, PMT = Payment per period, r = Annual interest rate (as decimal), freq = Payment frequency (12 for monthly, 4 for quarterly, 1 for annual), n = Duration in years.
Example — Payment Mode: You have $200,000 to invest in an annuity at 4.5% annual interest, with monthly payments over 25 years. Using the payment formula: r/freq = 0.045/12 = 0.00375, n×freq = 300 periods. Monthly payment = $200,000 × 0.00375 / [1 − (1.00375)^−300] ≈ $1,111.42/month.
Types of Annuities
Fixed Annuity
Pays a guaranteed, predetermined interest rate. Low risk, predictable income. Ideal for conservative retirees. The insurance company bears all investment risk. Rates are locked for the contract term.
Variable Annuity
Payments fluctuate based on underlying investment subaccounts (similar to mutual funds). Potential for higher growth but also lower income in down markets. Suitable for investors comfortable with market risk.
Indexed Annuity
Returns are linked to a market index (e.g., S&P 500) but with a floor (minimum return, typically 0%) and a participation cap. Offers moderate growth potential with downside protection.
Immediate Annuity
Payments begin within one year of the lump sum purchase. Often used by retirees who need income right away. The lump sum is irrevocably converted to an income stream.
Deferred Annuity
The accumulation phase (growth) comes first, followed by the payout phase. Commonly used to build tax-deferred retirement savings. Can be fixed, variable, or indexed during accumulation.
Annuity Payout Rates: What to Expect
The monthly income an annuity provides depends on the lump sum invested, the interest rate, the payment term, and the type of annuity. Below are approximate monthly income examples for a $100,000 immediate fixed annuity:
| Interest Rate | 10-Year Term | 20-Year Term | 30-Year Term |
|---|---|---|---|
| 3% | $965 | $554 | $421 |
| 4% | $1,012 | $606 | $477 |
| 5% | $1,061 | $660 | $537 |
| 6% | $1,110 | $716 | $600 |
Monthly payments per $100,000 invested, monthly frequency. Figures are illustrative estimates.
How to Use This Annuity Calculator
- Select Calculation Mode: Future Value (how much a lump sum grows), Present Value (how much you need to fund desired payments), or Payment (what income a lump sum generates).
- Future Value mode: Enter your Principal, Annual Interest Rate, Duration (years), and Payment Frequency. Get the total future value and interest earned.
- Present Value mode: Enter your desired periodic payment, Annual Interest Rate, Duration, and Frequency. Get the lump sum needed and total interest generated.
- Payment mode: Enter your Principal, Annual Interest Rate, Duration, and Frequency. Get the periodic payment amount and total payout over the term.
- Review milestone table — See how the value or remaining balance evolves at key points throughout the annuity term.
Frequently Asked Questions
What is an annuity?▾
How is an annuity payment calculated?▾
What is the difference between present value and future value of an annuity?▾
What is a fixed annuity?▾
What is a variable annuity?▾
How long will my annuity last?▾
What is a good annuity interest rate?▾
Is an annuity a good investment for retirement?▾
Complete Guide to Annuities and Retirement Income Planning
What Is an Annuity and How Does It Work?
An annuity is a contract between an individual and an insurance company in which the individual makes either a lump sum payment or series of payments, and in return the insurer provides regular disbursements beginning either immediately or at a future date. Annuities are designed primarily to solve the retirement income problem — the risk of outliving your savings — by converting accumulated wealth into a guaranteed income stream that can last a lifetime.
The annuity market in the US holds over $2 trillion in assets. The appeal is straightforward: Social Security provides a base guaranteed income floor, but personal savings carry longevity risk — the chance you live longer than your money lasts. An annuity with lifetime income payout essentially insures against this risk by pooling longevity across many policyholders. Those who die early subsidize those who live long, making guaranteed lifetime income financially viable for the insurer to offer.
The two fundamental phases of an annuity are the accumulation phase (when premiums are paid and the contract value grows, either at a guaranteed rate or linked to market performance depending on annuity type) and the distribution phase (when the annuity pays out, as lump sum, fixed-period payments, or lifetime income stream).
Annuity growth is tax-deferred during the accumulation phase — you pay no tax on earnings until withdrawal. This advantage is most valuable for high earners in high tax brackets who have maxed out other tax-advantaged accounts. For those in lower tax brackets, the tax deferral may not outweigh the higher fees relative to direct index fund investing.
Fixed, Variable, and Fixed Index Annuities Compared
Fixed annuities offer a guaranteed interest rate during the accumulation phase, similar to a CD but with tax-deferral. Multi-Year Guaranteed Annuities (MYGAs) lock in a specific rate for 3–7 years. In 2024, MYGA rates of 5–6% are available from highly-rated insurers — competitive with Treasury bonds but with tax-deferral. Fixed annuities are among the most transparent insurance products and suit conservative accumulation needs.
Variable annuities allow allocation among sub-accounts that function like mutual funds. Returns fluctuate with markets — higher potential but also downside risk. They often come with expensive Guaranteed Minimum Withdrawal Benefit (GMWB) riders that guarantee 4–6% annual withdrawals for life regardless of market performance, but these riders typically cost 0.5–2% per year, significantly eroding net returns. Carefully model total annual costs before purchasing variable annuities.
Fixed Index Annuities (FIAs) link interest credits to a market index subject to a cap (typically 8–12%) and a floor (usually 0%). They combine the principal protection of fixed annuities with index growth potential. FIAs are generally simpler and cheaper than variable annuities with GMWB riders and suit retirees seeking market-linked growth without principal risk.
Income annuities (Single Premium Immediate Annuities or SPIAs) convert a lump sum directly into a guaranteed income stream starting within one year. They offer the highest guaranteed monthly income per dollar invested of any annuity type and are ideal for converting a portion of savings into pension-like income covering essential retirement expenses.
Annuity Payout Options and the Lump Sum vs. Monthly Payment Decision
When an annuity enters the distribution phase, you choose a payout option — typically irrevocably. Life Only provides the highest monthly payment but terminates at death with no residual to heirs. Life with Period Certain guarantees payments for the longer of your lifetime or a set period (10 or 20 years), ensuring a minimum total payout to beneficiaries. Joint and Survivor continues payments for two lives (typically spouses) at 50%, 75%, or 100% of the original benefit after the first death. Fixed Period pays for a set number of years regardless of longevity — not a lifetime guarantee.
The lump sum versus monthly payment decision for pensions and legal settlements involves a break-even analysis: divide the lump sum by the monthly payment to find the number of months to break even on a simple basis. Discount future payments at an appropriate rate to find present value. At a 4% discount rate, a 20-year stream of $2,800/month is worth approximately $381,000 in present value; at 6%, approximately $328,000. If you can invest the lump sum at a higher rate than the annuity's implied yield, the lump sum may be preferable.
Key qualitative factors in the lump sum decision: the pension fund's financial health, your investment discipline and confidence, health and family longevity history, whether you have other guaranteed income (Social Security), survivor benefit options, and tax treatment. There is no universally correct answer — the right choice depends entirely on individual circumstances, risk tolerance, and financial planning goals.
Frequently Asked Questions About Annuities
Are annuities a good investment for retirement?
Annuities serve a specific purpose — converting savings into guaranteed income and managing longevity risk — rather than pure investment growth. A SPIA that converts a portion of savings into guaranteed income to cover essential expenses is often sound retirement planning. Variable annuities with high fees sold as investment products are often poor choices. Ask whether the feature you are buying (guaranteed lifetime income, principal protection, tax deferral) is worth the cost compared to alternatives. For simple income annuities providing longevity insurance, the answer can be yes; for high-fee variable annuities, often no.
What happens to my annuity if the insurance company goes bankrupt?
Annuities are protected by state guaranty associations — the insurance industry equivalent of FDIC protection. Coverage limits vary by state but typically range from $250,000 to $500,000 per contract per insurer. If an insurer becomes insolvent, the state guaranty association steps in to continue coverage up to the limit. For contracts exceeding state limits, spread coverage across multiple highly-rated insurers. Always verify the insurer's AM Best rating (A or higher) and your state's specific coverage limits at NOLHGA.com before purchasing.
Can I withdraw money from an annuity early?
Most annuities allow penalty-free withdrawals of up to 10% of account value per year during the surrender charge period (typically 5–10 years). Withdrawals above this incur surrender charges starting at 7–10% in year 1, decreasing by 1% annually. Withdrawals before age 59½ also face a 10% IRS early withdrawal penalty. After the surrender period, you can withdraw freely without insurance company penalty, though ordinary income tax still applies to gains. Plan withdrawals carefully to minimize both surrender charges and tax bracket impact.
What is the difference between an immediate and deferred annuity?
An immediate annuity (SPIA) converts a lump sum directly into an income stream beginning within 1–12 months — no separate accumulation phase. You exchange a lump sum for guaranteed future payments. A deferred annuity has an accumulation phase (years or decades) before converting to income. Immediate annuities are appropriate when you need income now; deferred annuities suit those still accumulating savings for future retirement income needs. Deferred income annuities (DIAs) combine both: purchased today but income starts at a future date, typically at a higher payout rate because the insurer uses the deferral period for investment gains.
How is annuity income taxed?
Non-qualified annuities (purchased with after-tax dollars) use an exclusion ratio — each payment is partly tax-free (return of principal) and partly taxable (earnings). Once your basis is fully recovered, all subsequent payments are fully taxable. Qualified annuities (inside IRA or 401k, pre-tax dollars) are 100% taxable as ordinary income upon distribution. Lump-sum withdrawals from non-qualified annuities are taxed on a LIFO basis — earnings are withdrawn first and are fully taxable. Always model the tax impact of both annuitization and lump-sum withdrawal to choose the most tax-efficient distribution strategy.