What Is Tax-Deferred Growth? Accounts, RMDs, and Withdrawals

Tax-deferred growth is the tax treatment that lets investment earnings inside certain retirement accounts compound year after year without being taxed, with the tax bill coming due only when you take the money out. A 401(k), a traditional IRA, a 457(b), and a deferred annuity all work this way. In 2026, a worker can shelter up to $24,500 in a 401(k) alone before any tax touches the gains.¹ The trade is simple: decades of uninterrupted compounding now, ordinary income tax on withdrawals later.

How the Deferral Actually Works

In a regular brokerage account, every dividend, interest payment, and profitable sale generates a tax bill for that year. You report the income, pay what you owe, and reinvest what’s left. A tax-deferred account changes the timing. Dividends, interest, and capital gains still pile up inside the account, but the tax code does not treat that growth as taxable income while it stays there.

The legal foundation sits in 26 U.S.C. § 401 for employer-sponsored plans and 26 U.S.C. § 408 for individual retirement accounts. Both statutes define the conditions under which earnings stay shielded from current-year taxation.²³ The key concept is recognition. Your balance may grow by $5,000 in a given year, but the law does not recognize that $5,000 as income while it stays inside the account. Only when you take a distribution does it get reclassified as income subject to federal tax.

Why Deferral Matters: the Compounding Math

In a taxable account, a slice of every year’s gains gets skimmed for taxes. If your investments earn 7% but you lose 15% of that gain to taxes on dividends and realized capital gains, your effective growth rate drops closer to 6%. Over one year, the difference barely registers. Over 25 or 30, it reshapes the outcome.

Inside a tax-deferred account earning the same 7%, the full return stays in and compounds on itself. You are reinvesting gross earnings, not net-of-tax earnings, so the base your returns build on is always larger. Dollars that would have gone to the IRS in year one earn a return in year two, and that return earns a return in year three. The gap widens every year. By the time you retire and start paying tax on withdrawals, the larger balance often more than makes up for the eventual tax bill, especially if you land in a lower bracket than during your peak earning years.

Accounts That Offer Tax-Deferred Growth

Several account types qualify. The right one depends on whether you have access to an employer plan, how much you earn, and when you expect to need the money.

401(k) and 403(b) Plans

The 401(k) is the most common tax-deferred vehicle for private-sector workers. Contributions come out of your paycheck before income tax is calculated, immediately reducing your taxable income for the year. The plan is governed by 26 U.S.C. § 401(k).² The 403(b) works almost identically but is reserved for employees of public schools, nonprofits, and certain religious organizations under 26 U.S.C. § 403(b).⁴

For 2026, the elective deferral limit for both plans is $24,500. Workers 50 and older can add an $8,000 catch-up, bringing their ceiling to $32,500. A SECURE 2.0 provision raises the catch-up to $11,250 for participants aged 60 through 63, for a maximum of $35,750.¹

Traditional IRAs

A traditional IRA delivers tax deferral without needing an employer plan. Anyone with earned income can contribute, and depending on your income and whether you or your spouse are covered by a workplace plan, those contributions may also be deductible. Distributions follow the same rules as employer plans: taxed as ordinary income when withdrawn.³

The 2026 IRA contribution limit is $7,500, with an additional $1,100 catch-up for those 50 and older. If a workplace retirement plan covers you, the deduction for traditional IRA contributions phases out between $81,000 and $91,000 of modified adjusted gross income for single filers, and between $129,000 and $149,000 for married couples filing jointly. If neither spouse has a workplace plan, there is no income cap on the deduction.¹

Governmental 457(b) Plans

Governmental 457(b) plans, offered to state and local government employees, share the $24,500 deferral limit for 2026. Their standout feature: distributions are not subject to the 10% early withdrawal penalty regardless of your age when you take them, as long as the money did not originate from a rollover out of a different plan type.⁵ That makes the 457(b) especially useful for anyone planning to retire before 59½.

Deferred Annuities

Annuity contracts issued by insurance companies receive tax-deferred treatment under 26 U.S.C. § 72. Earnings inside the contract grow untaxed until payments begin. Unlike 401(k)s and IRAs, annuities have no annual contribution cap set by the IRS, though they carry their own costs, including surrender charges and insurance-related fees.⁶ The earnings portion of annuity withdrawals is taxed as ordinary income, not at capital gains rates.

Health Savings Accounts

An HSA technically goes further than tax deferral. Contributions are tax-deductible, earnings grow tax-free, and withdrawals used for qualified medical expenses are never taxed. For non-medical withdrawals, however, the account acts like a traditional tax-deferred plan: after age 65 you owe ordinary income tax on the distribution but avoid the 20% additional penalty that applies to non-medical withdrawals taken earlier.⁷

Tax-Deferred Is Not the Same as Tax-Free

The distinction between tax-deferred and tax-free growth trips up more people than almost any other retirement planning question. A traditional 401(k) or IRA defers taxes: you get a deduction now, the money grows untaxed, and you pay ordinary income tax on withdrawal. A Roth 401(k) or Roth IRA flips the sequence: you contribute money that has already been taxed, it grows without any tax, and qualified withdrawals come out completely tax-free.⁸

For a Roth withdrawal to qualify, you must be at least 59½ and the account must have been open for at least five tax years. Meet both conditions and every dollar comes out free of federal tax, including decades of accumulated growth. That is not deferral; the tax obligation is permanently eliminated.

Which structure wins depends on whether your tax rate is higher now or in retirement. If you expect a lower bracket later, the traditional route usually comes out ahead. If you expect your rate to stay the same or climb, the Roth locks in today’s rate and lets future growth escape taxation entirely. Roth 401(k) contributions share the $24,500 limit with traditional deferrals for 2026, and Roth IRAs share the $7,500 ceiling, though Roth IRA eligibility phases out between $153,000 and $168,000 for single filers and between $242,000 and $252,000 for joint filers.¹

How the Tax Bill Gets Paid

When the deferral period ends, the IRS collects. Every dollar withdrawn from a traditional tax-deferred account is taxed as ordinary income at your current federal rate, which ranges from 10% to 37% for 2026 depending on total taxable income.⁹ The gains do not get the lower long-term capital gains rates (0%, 15%, or 20%) that apply to a taxable brokerage account. Ordinary income treatment is the price you pay for years of untaxed compounding.

State income taxes add another layer. Most states tax retirement distributions as ordinary income, though a handful impose no state income tax at all. The combined federal-plus-state rate determines how much of a withdrawal you actually keep, so your state of residence in retirement matters more than many people expect.

Deferred annuities work slightly differently. You recover your original after-tax premium payments tax-free as a return of your investment, and only the earnings portion is taxed as ordinary income. The IRS applies an exclusion ratio under 26 U.S.C. § 72 to split each payment between the taxable and non-taxable portions.⁶

Required Minimum Distributions

The IRS does not let tax-deferred money sit untouched forever. Under 26 U.S.C. § 401(a)(9), most account holders must begin required minimum distributions once they reach age 73. The required beginning date is April 1 of the year following the year you turn 73, and distributions continue annually after that.² The same rules apply to traditional IRAs under parallel provisions in 26 U.S.C. § 408.³ Roth IRAs are exempt from RMDs during the owner’s lifetime.

Missing an RMD triggers a 25% excise tax on the shortfall under 26 U.S.C. § 4974. Catch the mistake and take the missed distribution within the correction window, and the penalty drops to 10%.¹⁰ Before SECURE 2.0 took effect in 2023, the penalty was 50%, so the current version is more forgiving. It is still steep enough to make a calendar reminder worth setting.

Getting Money Out Before 59½

Pulling money from a tax-deferred account before age 59½ generally triggers a 10% additional tax on top of the ordinary income tax you already owe.⁵ The penalty exists to discourage treating retirement accounts like savings accounts.

The list of exceptions is longer than most people expect. Leaving your employer during or after the year you turn 55 lets you tap that employer’s 401(k) or 403(b) penalty-free (public safety employees of state or local governments qualify at 50). Substantially equal periodic payments based on your life expectancy avoid the penalty if you keep the schedule going for at least five years or until 59½, whichever is longer. Total and permanent disability, terminal illness, unreimbursed medical expenses above 7.5% of AGI, up to $10,000 for a first home from an IRA, qualified higher education expenses from an IRA, up to $5,000 per child for birth or adoption, and up to $22,000 for a federally declared disaster all provide relief.⁵

Exceptions vary by account type. The age-55 separation rule applies to employer plans but not to IRAs. The education and first-home exceptions apply to IRAs but not to employer plans. Also worth knowing: SIMPLE IRA distributions taken within the first two years of participation face a 25% penalty rather than 10%.⁵

What Happens When a Tax-Deferred Account Is Inherited

When the owner of a tax-deferred account dies, the beneficiary inherits the tax obligation along with the money. Surviving spouses have the most flexibility: they can roll the inherited account into their own IRA, treat it as their own, and delay distributions until their own RMD age. Certain “eligible designated beneficiaries,” including minor children of the deceased, disabled or chronically ill individuals, and anyone no more than 10 years younger than the account holder, can stretch distributions over their own life expectancy.¹¹

Everyone else falls under the 10-year rule from the SECURE Act of 2019. Non-spouse beneficiaries who inherited after 2019 must empty the entire account by December 31 of the tenth year following the owner’s death. If the original owner had already started RMDs, the beneficiary must also take annual distributions during those 10 years. If the owner had not started RMDs, annual distributions are not required, but the account must still be fully distributed by the end of year 10.¹¹ Withdrawing the whole balance in a single year can push a beneficiary into a much higher bracket, so planning the timing of distributions within that window is where most of the tax savings live.

1
Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
2
Office of the Law Revision Counsel. 26 USC 401 – Qualified Pension, Profit-Sharing, and Stock Bonus Plans
3
Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts
4
Office of the Law Revision Counsel. 26 USC 403 – Taxation of Employee Annuities
5
Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions
6
Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts
7
Internal Revenue Service. Publication 969, Health Savings Accounts and Other Tax-Favored Health Plans
8
Office of the Law Revision Counsel. 26 USC 408A – Roth IRAs
9
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
10
Office of the Law Revision Counsel. 26 USC 4974 – Excise Tax on Certain Accumulations in Qualified Retirement Plans
11
Internal Revenue Service. Retirement Topics – Beneficiary