Interest accumulates in a deferred annuity through compounding, which means you earn returns on both your contributions and the earnings already in the account

In a deferred annuity, the insurance company invests your money and credits interest or investment gains to your account. Unlike a savings account where you withdraw money regularly, a deferred annuity lets those earnings sit and grow without interruption until you decide to start taking withdrawals — usually years later. The longer money stays in the account, the more it compounds, because each year's earnings generate their own earnings in the following years.

The exact way interest accumulates depends on the type of deferred annuity you own. A fixed deferred annuity earns a rate set by the insurance company for a specific period, often one to ten years. A variable deferred annuity earns returns based on the performance of investment subaccounts you choose, similar to mutual funds. An indexed deferred annuity earns returns tied to a market index like the S&P 500, with a may provide minimum return and a cap on how much you can earn in any year.

Key Takeaways

  • Interest in a deferred annuity compounds annually, meaning you earn returns on your original money plus all previous earnings combined.
  • Fixed annuities earn a stated rate set by the insurance company; variable annuities earn based on your chosen investments; indexed annuities earn based on an index with a floor and ceiling.
  • You do not pay income tax on the earnings while they sit in the account — tax is deferred until you withdraw money.
  • The insurance company credits earnings to your account balance, which grows the amount available when you begin withdrawals or take a lump sum.

How compounding works in a fixed deferred annuity

A fixed deferred annuity pays a may provide interest rate for a set period called the initial rate period. The insurance company might offer 4.5 percent annually for seven years, for example. Each year, the company calculates interest on your entire account balance — the money you put in plus all interest earned so far — and adds it to the account.

If you deposit $50,000 and earn 4.5 percent in year one, you gain $2,250, bringing your balance to $52,250. In year two, you earn 4.5 percent on $52,250, not just the original $50,000, which gives you $2,351.25 in new interest. That difference — earning interest on interest — is compounding. Over seven years without any withdrawals, that $50,000 grows to roughly $66,500, even though you made no additional deposits.

When the initial rate period ends, the insurance company offers a new rate for the next period. That rate is may provide to be no lower than a minimum stated in your contract, but it can be higher or lower than what you earned before. Your accumulated balance continues to compound at whatever new rate applies.

How compounding works in a variable deferred annuity

A variable deferred annuity does not pay a set rate. Instead, you direct your contributions into subaccounts — investment options managed by the insurance company or a third party. These subaccounts typically track stock funds, bond funds, money market funds, or balanced portfolios. Your earnings depend entirely on how those investments perform.

If your subaccount gains 8 percent in a year, your account balance grows by 8 percent. If it loses 3 percent, your balance shrinks by 3 percent. Compounding still happens: gains in year one become part of the base that earns or loses in year two. But because investment returns vary, you cannot predict what your account will be worth at any future date the way you can with a fixed annuity.

Many variable annuities include a may provide minimum return, often around 0 to 1 percent annually, which protects you if your investments perform very poorly. Some also include a may provide minimum accumulation benefit, which promises that your account will reach a certain value by a certain date, even if investments underperform. These guarantees come with extra fees.

How compounding works in an indexed deferred annuity

An indexed deferred annuity earns returns based on the performance of a market index — most commonly the S&P 500, but sometimes the Nasdaq 100, Russell 2000, or other indexes. The insurance company credits a percentage of the index's annual gain to your account, up to a maximum called the cap. If the index gains 12 percent but your annuity has a 6 percent cap, you earn 6 percent that year.

Indexed annuities also include a floor, usually 0 percent, which means you cannot earn less than that amount even if the index declines. If the S&P 500 falls 8 percent in a year, your account earns 0 percent instead of losing 8 percent. This floor protects your principal but limits your upside when markets rise sharply.

The cap and floor change each year when the insurance company resets your contract terms. A cap might be 5 percent one year and 7 percent the next, depending on interest rates and market conditions. Your accumulated balance compounds at whatever rate you earn each year, but you will never earn more than the cap or less than the floor, regardless of how the index performs.

Tax treatment of accumulated earnings

The word "deferred" in deferred annuity refers to the tax treatment of earnings. You do not owe income tax on interest, investment gains, or index credits while they sit in the account. This is different from a regular investment account, where you typically owe tax each year on dividends and capital gains.

Tax is deferred until you withdraw money. When you take a withdrawal, the insurance company calculates how much of it is your original contributions (which are not taxed again) and how much is earnings (which are taxed as ordinary income at your tax rate that year). If you withdraw before age 59½, you may also owe a 10 percent early withdrawal penalty on the earnings portion, though some exceptions exist.

This tax deferral allows your money to compound faster than it would in a taxable account, because you are not paying tax on earnings each year. However, when you eventually withdraw, all earnings are taxed as ordinary income, not at the lower capital gains rate that applies to some investments.

How your account balance grows over time

The insurance company tracks your account value or accumulation value, which is the total of all your contributions plus all accumulated earnings minus any withdrawals or fees. This is the number you see on your annual statement. It is also the amount the insurance company uses to calculate how much you can withdraw or what your income will be if you convert the annuity to a stream of payments.

Some deferred annuities charge mortality and expense fees (typically 0.5 to 1.5 percent annually) and administrative fees (typically 0.1 to 0.5 percent annually). Variable annuities also charge fees for the subaccounts themselves, which vary by fund. These fees are deducted from your account value, so they reduce how much interest or investment gain you actually keep.

Your account statement shows the gross earnings (before fees) and the net earnings (after fees). Over decades, even small fee differences compound significantly. A 1 percent annual fee on a $100,000 account compounds to roughly $28,000 in lost growth over 30 years, assuming 5 percent annual returns.

Surrender charges and early withdrawal limits

Most deferred annuities include a surrender period, typically 5 to 10 years, during which you can withdraw only a small amount (often 10 percent per year) without penalty. If you withdraw more than that, the insurance company charges a surrender fee, which is a percentage of the amount withdrawn. A surrender fee might start at 7 percent in year one and decline by 1 percent each year until it reaches zero.

Surrender fees are separate from the 10 percent early withdrawal penalty the IRS charges if you withdraw before age 59½. You could owe both: the insurance company's surrender fee plus the IRS penalty plus income tax on the earnings portion. This is why deferred annuities are designed for money you do not plan to touch for many years.

Some annuities allow you to withdraw earnings without a surrender fee while the surrender period is still active, though you still owe income tax and possibly the IRS penalty. Read your contract to see what withdrawals are allowed without penalty.

Frequently Asked Questions

Can I choose how my money is invested in a fixed deferred annuity?

No. The insurance company invests your money and guarantees a specific rate of return. You have no control over where the money goes. Your only choice is which insurance company to buy from and what initial rate period you want (typically one to ten years).

What happens to my earnings if the insurance company goes out of business?

Each state has a guaranty fund that protects annuity owners if an insurance company fails. Coverage limits vary by state but typically protect up to $250,000 per person per company. Check your state's insurance department website to see the exact limit where you live.

Do I have to take withdrawals at a certain age?

No. Unlike retirement accounts such as IRAs, deferred annuities have no required minimum distributions. Your money can stay in the account and compound for as long as you want. However, if you withdraw before age 59½, you owe a 10 percent IRS penalty on the earnings portion (with some exceptions).

Can I move my deferred annuity to a different insurance company?

Yes, through a process called a 1035 exchange, which lets you transfer the account to another annuity without triggering when ready taxes. However, you start a new surrender period with the new company, and you may owe surrender fees on the old annuity if you are still in its surrender period. Consult a tax professional before doing this.

What is the difference between the interest rate and my actual earnings?

The interest rate is what the insurance company credits to your account before fees. Your actual earnings are the interest rate minus any fees charged. If a fixed annuity earns 4.5 percent but charges 0.75 percent in annual fees, your net earnings are roughly 3.75 percent.