Tax-deferred means you don’t pay income tax on money when you earn or invest it. You pay later, when you take it out. The deferral covers both the dollars you contribute and any growth those dollars produce inside the account, so nothing is siphoned off for taxes along the way. In practice, “tax-deferred” is a feature built into retirement accounts like traditional 401(k)s and traditional IRAs, and into a few other products such as deferred annuities and U.S. savings bonds.
How the Deferral Actually Works
Contributions to a tax-deferred account go in before federal and state income taxes are calculated. Those pre-tax dollars are subtracted from your gross income, which lowers what shows up as taxable income on your return. Earn $85,000, contribute $10,000 to a traditional 401(k), and only $75,000 is taxed that year. In a high-earning year, that reduction can move you into a lower bracket.1Internal Revenue Service. Federal Income Tax Rates and Brackets The rule that lets you exclude these contributions from current-year income lives at IRC Section 402(g), which also sets the annual cap.2Office of the Law Revision Counsel. 26 USC 402 – Taxability of Beneficiary of Employees Trust
Once the money is inside the account, dividends, interest, and capital gains that would normally trigger a tax bill each year are reinvested instead. Nothing leaves the account for the IRS until you make a withdrawal. Over long stretches, that matters. A $10,000 investment growing at 7% for 30 years reaches roughly $76,000 in a tax-deferred account, while the same investment in a regular taxable account, where annual gains are taxed along the way, ends up noticeably smaller. The longer the money stays put, the wider the gap.
Where You Can Get Tax Deferral
Tax deferral isn’t a single product. It’s a feature shared by several account types, each tied to a different employment situation.
Employer-Sponsored Plans
The traditional 401(k) is the most common. Your employer withholds contributions from your paycheck before calculating income tax, and the money goes into an investment account in your name. These plans are governed by the Employee Retirement Income Security Act, which sets standards for how plan assets are handled and disclosed to participants.3U.S. Department of Labor. Employee Retirement Income Security Act (ERISA)
The 403(b) works nearly identically and is available to employees of public schools, nonprofits, and certain religious organizations. Deferred salary in a 403(b) is not subject to federal or state income tax until it’s distributed.4Internal Revenue Service. IRC 403(b) Tax-Sheltered Annuity Plans Government employees often have access to 457(b) plans, which share the same deferral limit but carry a distinct advantage: withdrawals before age 59½ from a governmental 457(b) are not subject to the 10% early withdrawal penalty that applies to other retirement accounts.
Individual and Small-Business Plans
Traditional IRAs are open to anyone with earned income.5Office of the Law Revision Counsel. 26 USC 32 – Earned Income You contribute on your own, and depending on your income and whether you’re covered by a workplace plan, the contribution may be fully or partially deductible. Self-employed people and small businesses have their own options. A SEP IRA lets an employer contribute up to 25% of an employee’s compensation.6Internal Revenue Service. SEP Contribution Limits (Including Grandfathered SARSEPs) SIMPLE IRAs are designed for businesses with 100 or fewer employees and require the employer to either match employee contributions up to 3% of compensation or make a flat 2% contribution for all eligible workers.7Internal Revenue Service. SIMPLE IRA Plan
2026 Contribution Limits
The IRS adjusts how much you can defer each year. Any amount above the cap gets taxed twice, once going in and again coming out, so the number matters. For 2026:8Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
- 401(k), 403(b), 457(b), and TSP: $24,500 in employee deferrals. Workers 50 and older can add $8,000, and workers aged 60 through 63 can add $11,250 instead.
- Traditional IRA: $7,500, with a $1,100 catch-up at age 50 and older.
- SIMPLE IRA: $17,000, with a $4,000 catch-up at 50 and older and $5,250 for ages 60 through 63.
- SEP IRA: the lesser of 25% of compensation or $72,000.6Internal Revenue Service. SEP Contribution Limits (Including Grandfathered SARSEPs)
The enhanced catch-up for ages 60 through 63 is new under SECURE Act 2.0. If your plan document hasn’t been updated to allow it, the higher limit isn’t available to you even though the law permits it. Ask your plan administrator.
Non-Retirement Products
Deferred annuities, which are contracts issued by insurance companies, let earnings accumulate without triggering annual income tax. You owe tax on the growth only when payments start or you make a withdrawal, and distributions follow a specific ordering rule: earnings come out first as ordinary income, then your original investment comes out tax-free.9Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts Series EE and Series I savings bonds also carry a deferral option. You can report interest each year or wait until you redeem the bond or it hits its 30-year maturity.10TreasuryDirect. Series EE Savings Bonds Most bondholders defer, so no interest income appears on the return until the bond is cashed out.11Internal Revenue Service. Savings Bonds
Paying the Tax Later
The deferral eventually ends. When you withdraw money from a tax-deferred account, every dollar, both what you put in and what it grew into, is taxed as ordinary income at your marginal rate that year.1Internal Revenue Service. Federal Income Tax Rates and Brackets The financial institution reports the distribution to you and the IRS on Form 1099-R.12Internal Revenue Service. About Form 1099-R, Distributions From Pensions, Annuities, Retirement or Profit-Sharing Plans, IRAs, Insurance Contracts, etc.
One common surprise: if you take an eligible rollover distribution from a 401(k) and have the check sent to you rather than transferred directly to another retirement account, 20% is automatically withheld for federal tax, even if you plan to roll it over yourself within 60 days.13Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions Requesting a direct trustee-to-trustee transfer avoids that. State taxes then add another layer. Some states fully tax retirement distributions, others exempt some or all retirement income, and a handful have no income tax at all. Where you live when you take money out matters more than where you lived when you put it in.
Required Minimum Distributions
You can’t defer forever. Under IRC Section 401(a)(9), you must begin taking required minimum distributions from most tax-deferred accounts once you reach age 73.14Office of the Law Revision Counsel. 26 USC 401 – Qualified Pension, Profit-Sharing, and Stock Bonus Plans The first RMD is due by April 1 of the year after you turn 73, and every RMD after that is due by December 31. Delaying the first one to April means taking two RMDs in the same calendar year, which can spike your tax bill.15Internal Revenue Service. Retirement Topics – Required Minimum Distributions (RMDs) The amount is calculated by dividing your prior-year December 31 balance by an IRS life expectancy factor. Miss an RMD and the penalty runs up to 25% of what should have been withdrawn. Starting in 2033, the applicable age increases to 75 for people who turn 74 after December 31, 2032.
The Cost of Taking Money Out Early
Pulling money from a tax-deferred retirement account before age 59½ triggers a 10% additional tax on top of the regular income tax.16Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts A $20,000 early withdrawal for someone in the 22% bracket costs $6,400: $4,400 in income tax plus $2,000 in penalty.
Several exceptions remove the 10% penalty, though you still owe income tax on the money:17Internal Revenue Service. Hardships, Early Withdrawals and Loans
- Permanent and total disability as defined by the IRS.
- A series of substantially equal periodic payments taken over your life expectancy (sometimes called 72(t) distributions).
- Unreimbursed medical expenses exceeding 7.5% of AGI.
- Separation from service during or after the year you turn 55, for 401(k) and similar employer plans.
- Any withdrawal from a governmental 457(b) plan, which is not subject to the 10% penalty at any age.
SIMPLE IRAs are harsher during the first two years of participation: the penalty is 25% rather than 10%, and the two-year clock runs from your first contribution, not from when the account was opened.7Internal Revenue Service. SIMPLE IRA Plan
Tax-Deferred Is Not the Same as Roth
This distinction trips people up. Tax-deferred accounts, like traditional 401(k)s and traditional IRAs, give you a tax break now and tax you later. Roth accounts do the opposite: you pay tax on the contribution now, and qualified withdrawals in retirement come out completely tax-free.18Internal Revenue Service. Traditional and Roth IRAs A Roth is tax-exempt at the back end, not tax-deferred. When articles or plan menus lump them together, they’re using the retirement-account label, not the tax treatment.
You can also convert existing tax-deferred funds into a Roth IRA, but you owe income tax on the full converted amount in the year of the conversion, reported on Form 8606.19Internal Revenue Service. Retirement Plans FAQs Regarding IRAs
When Deferral Pays Off, and When It Doesn’t
The benefit of tax deferral is largest when your tax rate today is higher than it will be when you withdraw. If you’re in the 32% bracket in your peak earning years and drop to 22% in retirement, every dollar you defer saves 10 cents in federal tax on top of the compounding gain. The math is even better if you’re in a high-tax state now and plan to retire somewhere with lower or no state income tax.
Deferral works against you if your rate rises. Someone who defers $500,000 at 22% and later withdraws it when their combined federal and state rate is 30% has paid for the privilege of postponing the bill. Large RMDs can also push retirees into higher brackets than they expected, especially once Social Security is layered on. That’s the case for holding some Roth money alongside tax-deferred money, or for using Roth conversions in low-income years to lock in a known rate. Nobody knows what future tax rates will be, which is why many planners suggest a mix of both.