Tax deferred means you delay paying taxes on money or investment gains until a later year
When an account or investment is tax deferred, the money inside grows without triggering a tax bill each year. You do not pay income tax on the earnings, interest, or gains until you withdraw the money — usually in retirement. The tax bill is postponed, not erased.
The most common tax-deferred accounts are retirement savings plans: 401(k)s, traditional IRAs, and 403(b)s. Money you put into these accounts reduces your taxable income for that year. The balance grows tax-free inside the account. When you take money out later, that withdrawal counts as income and you owe taxes on it then.
Tax deferral is different from tax-free. A tax-free account (like a Roth IRA) means you never pay tax on the growth or withdrawals. With tax-deferred accounts, you are just moving the tax bill to the future.
Key Takeaways
- Tax-deferred accounts let your money grow without annual tax bills, but you pay taxes when you withdraw it.
- Contributions to traditional 401(k)s and IRAs reduce your income taxes in the year you make them.
- You must start withdrawing from most tax-deferred accounts at age 73, and those withdrawals are taxed as income.
- Tax deferral works best if you expect to be in a lower tax bracket in retirement than you are now.
How tax deferral changes your tax bill right now
When you contribute to a traditional 401(k) or IRA, that money comes out of your paycheck or bank account before income tax is calculated. If you earn $60,000 and put $7,000 into a traditional 401(k), your taxable income for the year is $53,000, not $60,000. You pay income tax only on the $53,000.
This immediate tax reduction is why many people use tax-deferred accounts. You lower your tax bill today while saving for later. The trade-off is that you will owe taxes on the full amount (contributions plus all the growth) when you withdraw it.
Your employer may also match part of your 401(k) contribution. That matching money is also tax-deferred — you do not pay tax on it until you withdraw it.
How money grows inside a tax-deferred account
Inside a tax-deferred account, your money can be invested in stocks, bonds, mutual funds, or other investments. Whatever those investments earn — dividends, interest, capital gains — does not trigger a tax bill that year. The earnings stay in the account and compound over time.
This is the power of tax deferral: your full balance keeps working for you without taxes eating into the growth each year. Over decades, this can add up to significantly more money than if you paid taxes annually on the gains.
For example, $10,000 growing at 7 percent per year in a tax-deferred account will be worth roughly $76,000 after 30 years (before you withdraw it). The same $10,000 in a regular taxable account, where you pay taxes on gains each year, would be worth less because some of the growth goes to taxes.
When you have to pay taxes on the money
You can withdraw money from a tax-deferred account at any time, but withdrawals before age 59½ usually trigger a 10 percent early withdrawal penalty on top of regular income taxes. Some exceptions exist — hardship withdrawals, first-time home purchases, and certain medical expenses — but they are limited and have strict rules.
At age 73, the IRS requires you to start taking withdrawals from most tax-deferred accounts (401(k)s, traditional IRAs, and similar plans). These are called required minimum distributions or RMDs. The amount is calculated based on your age and account balance. You owe income tax on every dollar you withdraw.
If you do not take your RMD, the IRS charges a penalty of 25 percent of the amount you should have withdrawn (or 10 percent if you correct it within two years). This is one of the steepest penalties in the tax code.
Tax-deferred versus tax-free accounts
A Roth IRA is tax-free, not tax-deferred. You contribute money that has already been taxed. The account grows tax-free, and you never pay taxes on withdrawals. You also do not have required minimum distributions at age 73.
The choice between tax-deferred and tax-free depends on your situation. Tax-deferred accounts make sense if you are in a high tax bracket now and expect to be in a lower one in retirement. Roth accounts make sense if you are in a lower bracket now or expect to be in a higher one later.
Many people use both: a traditional 401(k) or IRA for the immediate tax break, and a Roth IRA for tax-free growth. There are annual contribution limits for each type, so you cannot put unlimited money into both.
Tax-deferred accounts offered through employers
A 401(k) is a tax-deferred retirement plan offered by for-profit companies. A 403(b) is the nonprofit and public school version. Both work the same way: you contribute pre-tax money, it grows tax-deferred, and you pay taxes on withdrawals.
Many employers match a portion of your contribution — typically 3 to 6 percent of your salary. This matching money is assistance programs and is also tax-deferred. If your employer offers a match and you do not contribute enough to get it, you are leaving money on the table.
If you leave your job, you can roll your 401(k) or 403(b) into an IRA to keep it tax-deferred. You do not have to cash it out and pay taxes immediately.
Individual retirement accounts (IRAs)
A traditional IRA is a tax-deferred account you open on your own, not through an employer. You can contribute up to $7,000 per year (or $8,000 if you are 50 or older). Your contribution may be tax-deductible depending on your income and whether you have an employer retirement plan.
A traditional IRA grows tax-deferred and has the same required minimum distribution rules as a 401(k). You can also roll money from a 401(k) into an IRA if you change jobs.
A Roth IRA is the tax-free version. Contributions are not tax-deductible, but withdrawals are tax-free. Roth IRAs have no required minimum distributions, which makes them useful for people who do not need the money in retirement.
Frequently Asked Questions
Can I withdraw money from a tax-deferred account before retirement?
Yes, but you will owe income tax on the withdrawal plus a 10 percent early withdrawal penalty if you are under 59½. Some exceptions exist for hardship, disability, or first-time home purchases, but they have strict requirements and limits. Check with the plan administrator about what exceptions apply to your account.
What happens if I do not take my required minimum distribution?
The IRS charges a 25 percent penalty on the amount you should have withdrawn (reduced to 10 percent if you correct it within two years). This is separate from income tax. You still owe income tax on the RMD amount itself. Missing an RMD is one of the most expensive mistakes in retirement planning.
Is tax-deferred the same as tax-free?
No. Tax-deferred means you pay taxes later when you withdraw. Tax-free (like a Roth IRA) means you never pay taxes on the growth or withdrawals. Tax-deferred accounts reduce your taxes now; tax-free accounts reduce your taxes in retirement.
Can I have both a 401(k) and an IRA at the same time?
Yes. You can contribute to both a 401(k) through your employer and a traditional or Roth IRA on your own. Each has annual contribution limits, so the total you can save is higher if you use both. Contribution limits change each year, so check the IRS website for current amounts.
What if I change jobs — what happens to my 401(k)?
You can leave it with your former employer, roll it into your new employer's plan (if they allow it), or roll it into a traditional IRA. Rolling it into an IRA keeps it tax-deferred and gives you more investment choices. Do not cash it out — that triggers taxes and the early withdrawal penalty if you are under 59½.