Annuity Calculator

What is an Annuity Calculator?

An annuity calculator estimates the future value of an annuity during its accumulation phase. An annuity is a contract, typically issued by an insurance company, in which an investor contributes money over time (or as a lump sum) and receives a stream of payments in return — often used as a retirement income strategy. This calculator focuses on the accumulation phase: how much your annuity will be worth after a set number of years of contributions and growth.

The calculator accounts for:

• Starting principal — the initial lump-sum deposit
• Annual and monthly additions — recurring contributions
• Annual growth rate — the expected return (or crediting rate)
• Contribution timing — beginning (annuity due) or end (ordinary annuity)
• Time horizon — number of years until the payout phase

Annuity Due vs. Ordinary Annuity

The timing of contributions has a meaningful effect on the ending balance:

• Annuity Due: Contributions are made at the beginning of each period, so every contribution earns interest for one extra period.
• Ordinary (Immediate) Annuity: Contributions are made at the end of each period, so the first contribution earns no interest in the first period.

Because of the extra compounding, an annuity due always produces a slightly higher ending balance than an otherwise identical ordinary annuity. The difference grows with the contribution size, the growth rate, and the number of periods.

Types of Annuities

The calculator above handles the accumulation phase common to most annuity products. There are several major categories of annuities to be aware of:

• Fixed Annuity: A guaranteed interest rate for a set period. Low risk, predictable, and typically lower returns.
• Variable Annuity: Returns are tied to underlying investments (mutual funds). Higher potential returns but subject to market risk and higher fees.
• Indexed Annuity: A hybrid that credits interest based on an index (e.g., S&P 500) with a guaranteed floor and a cap on gains.
• Immediate Annuity: Begins payouts immediately after a lump-sum premium — often used by retirees.
• Deferred Annuity: Grows tax-deferred over an accumulation phase before payouts begin — this is what the calculator above models.

Tax Treatment of Annuities

Most non-qualified annuities grow on a tax-deferred basis. That means interest, dividends, and capital gains are not taxed as they accrue — they are only taxed when withdrawn. This allows the account to compound faster than an equivalent taxable account. Withdrawals before age 59½ are generally subject to a 10% IRS early withdrawal penalty in addition to ordinary income tax on the earnings portion.

Qualified annuities (funded through an IRA or 401(k) rollover) are tax-deferred until distribution, but contributions were already made pre-tax. For more information, see our 401K Calculator and Retirement Calculator.

Pros and Cons of Annuities

Pros:

• Tax-deferred growth with no annual contribution limit (unlike IRAs and 401(k)s)
• Guaranteed income options that can hedge against outliving your assets
• Useful for diversifying a retirement portfolio
• Some annuities offer a death benefit to heirs

Cons:

• Surrender charges and liquidity constraints, especially in early years
• High fees relative to low-cost index funds
• Generally lower returns than a diversified equity portfolio
• Complex tax and withdrawal rules that vary by contract

How to Use This Annuity Calculator

1. Enter the starting principal — your initial deposit.
2. Enter annual and/or monthly additions — recurring contributions.
3. Enter the annual growth rate — the expected return or crediting rate.
4. Enter the number of years — how long the accumulation phase lasts.
5. Choose the timing — beginning (annuity due) or end (ordinary annuity).
6. Click Calculate — view the ending balance, total additions, total interest earned, a pie chart, and a year-by-year accumulation schedule.

Frequently Asked Questions

What is the difference between an annuity and an IRA?

Both grow tax-deferred, but an IRA has an annual contribution limit set by the IRS. A non-qualified annuity has no contribution limit, but its earnings are typically taxed as ordinary income (not capital gains) upon withdrawal. Annuities also often include insurance-backed guarantees and additional riders.

Is a fixed or variable annuity better?

Fixed annuities offer a guaranteed rate and lower risk, while variable annuities offer potentially higher returns tied to market performance but come with market risk and higher fees. The right choice depends on your risk tolerance, time horizon, and retirement goals.

Can I withdraw money from an annuity early?

Yes, but withdrawals before age 59½ are generally subject to a 10% IRS penalty and ordinary income tax on the earnings. Additionally, most contracts impose surrender charges during the first 5–9 years, which can range from 1% to 10% of the account value.

How is the annuity growth rate determined?

For a fixed annuity, the growth rate is set by the insurer and guaranteed for a specific period. For a variable annuity, growth depends on the performance of the underlying investments. For an indexed annuity, growth is tied to an index such as the S&P 500, subject to a cap and a floor.

Do annuities have required minimum distributions (RMDs)?

Non-qualified annuities do not have RMDs during the owner's lifetime. However, annuities held inside a qualified plan (e.g., an IRA or 401(k)) are subject to the same RMD rules as the underlying plan, beginning at age 73 (or 72 if you turned 72 before Dec. 31, 2022).