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A sub-account is an investment option within a variable annuity that functions like a mutual fund. You allocate your premium among multiple sub-accounts, each with a different objective, asset class, and risk level. Your account value goes up or down depending on how those sub-accounts perform. This distinguishes variable annuities from fixed annuities, where the insurance company absorbs all market risk and pays you a guaranteed rate.
Think of sub-accounts like the investment menu inside a 401(k): you choose how to divide your money, and the performance of your selections drives the final balance.
When you buy a variable annuity, the insurance company separates your money into a dedicated "separate account" that is legally distinct from the insurer's general account. Within that separate account, you select sub-accounts to invest in. Common options include stock funds focused on large-cap or small-cap equities, bond funds, balanced funds, and money market funds. Most variable annuities offer between 10 and 50 sub-accounts.
You own accumulation units rather than fund shares. Each day, the net asset value of your sub-account accumulation units is recalculated based on the closing prices of the underlying securities, just like mutual fund shares.
Every sub-account charges an annual management fee, typically ranging from 0.5% to 1.5% of assets. On top of that, the annuity contract itself charges a mortality and expense risk fee, usually around 1.0% to 1.5% per year, which compensates the insurer for the death benefit and income guarantees embedded in the contract. Administrative fees may also apply.
The combined annual cost of a variable annuity sub-account often runs between 2% and 3.5%, which is substantially higher than a comparable standalone mutual fund. That extra cost funds the tax-deferral benefit, the insurance guarantees, and the income features of the annuity contract.
The major advantage of holding investments in sub-accounts rather than directly in mutual funds is tax deferral. Dividends, interest, and capital gains inside a variable annuity sub-account do not create a taxable event each year. Taxes apply only when you take distributions. This allows your investment returns to compound without annual tax drag, which can meaningfully increase long-term accumulation if you are in a high tax bracket during the growth phase.
Sub-accounts held inside a tax-qualified account like an IRA provide no additional tax benefit from the annuity wrapper, since the IRA itself already provides tax deferral.
Most variable annuities let you reallocate money among sub-accounts without triggering a taxable event. If you shift from an equity sub-account to a bond sub-account, you are not selling a taxable asset. This flexibility is useful for rebalancing your allocation as you approach retirement without the capital gains consequences you would face in a taxable brokerage account.
Some contracts limit the number of free transfers per year or impose a small fee per additional transfer after you exceed the free limit.
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