How Much Can You Really Contribute to a 401(k)? – Avoid This Mistake + FAQs

You can put up to $25,500 into a 401(k) in 2027 if you are under age 50, up from $24,500 in 2026. At age 50 or older the 2027 limit is $34,000, and at ages 60 to 63 it is $37,250, under the 2027 limits the Internal Revenue Service (IRS) released on November 12, 2026.

For 2026, the matching figures are $32,500 at 50 or older, with an $8,000 catch-up, and $35,750 at ages 60 to 63, with an $11,250 catch-up.

These limits cover traditional and Roth 401(k) money combined. They apply per person, across every plan you are in.

Employer money sits on top. The total from you and your employer can reach $72,000 for 2026 and $75,000 for 2027, plus any catch-up. That is how a Solo 401(k) owner saves far more than an employee.

An employer match does not reduce your own limit. It only counts toward that larger total.

The mistake in the title is deferring past your limit when you hold two jobs or switch jobs mid-year. Each employer tracks only its own plan, so nobody stops you but you.

One newer rule catches higher earners. If your wages top a set threshold, your catch-up contributions must now go in as Roth.

The 401(k) Limits and Terms That Decide How Much You Can Put In

A handful of terms control every number in this article. The 2027 figures come from IRS Notice 2026-66, which also lists the 2026 amounts they replace.

• Elective deferral: the money you choose to send from your paycheck, pre-tax or Roth. The cap for each year is in the limits table below.
• Employer match: money your employer adds based on what you put in, such as 50% of your contributions up to 6% of pay. It never counts toward your own deferral cap.
• Catch-up contribution: extra room once you are 50 or older by December 31.
• Ages 60 to 63 catch-up: a larger amount if you are 60, 61, 62 or 63 at the end of the calendar year.
• Traditional 401(k): pre-tax contributions that lower your taxable income now. Withdrawals are taxed as ordinary income later.
• Roth 401(k): after-tax contributions that grow tax-free. Qualified withdrawals are tax-free, and the limit is shared with traditional money.
• Solo 401(k): a plan for a self-employed person with no full-time employees other than a spouse. You contribute as both employee and employer.
• Section 415(c) limit: the cap on everything going into your account in a year, from you and your employer, with catch-ups on top.
• Compensation cap: the most pay a plan can count when it figures contributions or a match. It is $360,000 for 2026 and $375,000 for 2027.
• Highly compensated employee: for the 2027 plan year, someone who earned more than $160,000 in 2026 or owns more than 5% of the business. Pay above $170,000 in 2027 decides 2028 status.
• Roth catch-up wage threshold: $150,000 of 2025 wages for the 2026 rule, and $155,000 of 2026 wages for the 2027 rule. Above it, catch-ups must be Roth.

The sections below show how these pieces fit together for employees, high earners and the self-employed.

2026 & 2027 401(k) Contribution Limits at a Glance

The IRS raised the 401(k) limits for both 2026 and 2027. The table below shows each year's figures, and the agency posts every year's numbers in its cost-of-living adjustment table.

Tax year	Employee limit (under age 50)	Catch-up (age 50+)	Special catch-up (ages 60-63)	Total possible (employee + employer)
2026	$24,500	$8,000 ($32,500 total if 50+)	$11,250 ($35,750 total if 60-63)	$72,000 ($80,000 with 50+ catch-up; $83,250 at 60-63)
2027	$25,500	$8,500 ($34,000 total if 50+)	$11,750 ($37,250 total if 60-63)	$75,000 ($83,500 with 50+ catch-up; $86,750 at 60-63)

Your employee limit is the most you can send in through salary deferrals. It applies across all your 401(k) and similar plans combined, with traditional and Roth money counted together.

With two jobs that each offer a 401(k) in 2027, the deferral limit applies once, across both plans. You cannot defer the full amount in each.

If you are 50 or older by the end of the calendar year, you add the catch-up contribution. That brings your own money to the higher totals shown in the table.

At ages 60 to 63, your ceiling is higher still, as the table shows. The larger catch-up replaces the regular one, so you do not add the two together. At 64 you drop back to the regular catch-up.

The combined total covers your deferrals, the employer match, profit sharing and any after-tax contributions your plan allows. Catch-up dollars sit on top of it.

A 55-year-old in 2027 can have $83,500 go into the plan, which is the overall limit plus the regular catch-up.

A 61-year-old in 2027 can have $86,750 go in, using the larger catch-up instead. Reaching those totals takes very high pay or self-employment income.

The IRS sets these limits for the whole country and adjusts them each fall for inflation. The 2028 limits have not been released. The IRS will announce them, and no figure exists yet.

Your 2027 personal 401(k) limit by birth year, with age measured on December 31, 2027:

Year you were born	Age at the end of 2027	Your 2027 employee limit
1978 or later	Under 50	$25,500
1977 or earlier, except 1964-1967	50-59, or 64 and older	$34,000
1964 to 1967	60-63	$37,250

Traditional vs. Roth 401(k) Contributions – Same Limits, Different Tax Benefits

Traditional and Roth 401(k) deferrals share one annual limit, and the difference is when you pay the tax. The full comparison of a Roth 401(k) or traditional account walks through the tax math, and the table below sums it up.

Traditional vs. Roth 401(k) for tax years 2026 and 2027:

Aspect	Traditional 401(k)	Roth 401(k)
Contributions	Pre-tax; they lower your taxable income now.	After-tax; no deduction now.
Annual contribution limit	$24,500 (2026); $25,500 (2027), shared with Roth. Catch-up $8,000 / $8,500 at 50+; $11,250 / $11,750 at 60-63.	Same shared limit. Catch-ups must be Roth if your prior-year FICA wages from the employer top the Roth catch-up wage threshold.
Tax on withdrawals	Fully taxable as income.	Tax-free if the withdrawal is qualified.
Best for	A higher tax rate now than you expect in retirement, or a need for the tax break today.	A lower tax rate now than you expect later, or a wish for tax-free income in retirement.
Pros	Lowers taxable income today; pre-tax dollars cost less take-home pay.	Tax-free growth and income; no required minimum distributions during the owner's lifetime.
Cons	Withdrawals are taxed. Required minimum distributions start at 73, or 75 if born in 1960 or later.	No upfront tax break; each dollar contributed costs more take-home pay.

The limit applies to your traditional and Roth deferrals added together. In 2027 you could put $15,000 in traditional and $10,500 in Roth, which together reach the full limit for the year.

How you split it is your call, if your plan offers both, and you can change it during the year. The usual starting point is to defer enough to earn the full match, then choose the mix.

There is no income limit on Roth 401(k) contributions. Roth individual retirement accounts (IRAs) phase out at higher incomes, but a Roth 401(k) is open to anyone whose plan offers it.

People who weigh a Roth 401(k) or traditional often land on a simple pattern. Higher earners take the tax break now in the 401(k) and use a Roth IRA for tax-free money.

Two points favor Roth for people who max out. A maxed-out Roth deferral is worth more in retirement than the same dollars pre-tax, because the tax is already paid. All the growth also comes out tax-free.

Two points favor traditional. Pre-tax deferrals lower your adjusted gross income (AGI), which can help you qualify for other tax breaks. Retirees also tend to need less income, since they no longer have to save.

Nobody knows tax rates 30 years out. That doubt is largest for young savers, which is why many split their deferrals instead of going all one way. Employer money usually goes in pre-tax, so a saver who picks Roth still ends up with both kinds.

One limit on that choice applies. Workers over the wage threshold must put any catch-up in as Roth, as the next section explains.

Higher Earners: Catch-Up Contributions Must Now Be Roth

A rule from the SECURE 2.0 Act is now in effect. If you are 50 or older and your wages pass a set threshold, your catch-up contributions must go in as Roth.

For 2026, catch-ups must be Roth if your 2025 FICA wages from that employer exceeded $150,000. For 2027, the test is 2026 FICA wages above $155,000.

The plan looks at Box 3 of the Form W-2 from the employer that sponsors it. For the 2027 rule, that is your 2026 Form W-2.

Wages are counted one employer at a time. Pay from a second job or a former employer is not added in.

Your base deferral is untouched. Everything you defer in 2027 up to the regular limit can still go in pre-tax.

A plan with no Roth option creates a problem. Workers over the threshold cannot make catch-up contributions to that plan at all. Ask your benefits office before the year starts.

Self-employed people with no FICA wages from the business are not affected. Their catch-ups can still be pre-tax.

Take a 52-year-old who earned $200,000 in FICA wages from her employer in 2026. In 2027 she can defer the regular limit pre-tax, and her catch-up must go in as Roth.

She pays income tax on those catch-up dollars for 2027 and takes them out tax-free later. A coworker of the same age with $120,000 of 2026 wages can still choose pre-tax or Roth.

Solo 401(k) Contributions for Gig Workers and Small Business Owners

A Solo 401(k) is what the IRS calls a one-participant 401(k) plan. It is for a business owner with no employees other than a spouse, who contributes as both employee and employer.

• Employee deferral: up to the regular 2027 deferral limit, or 100% of your 2027 net self-employment earnings if that is less. Both catch-ups apply here too.
• Employer share for a sole proprietor or single-member limited liability company: 20% of 2027 net self-employment earnings, after you deduct half of your self-employment tax.
• Employer share for an S corporation or C corporation owner: 25% of the W-2 pay the business pays you in 2027. The math for an S-corp owner's Solo 401(k) starts from that wage figure.
• Combined cap: the two pieces together cannot pass the overall limit for the year, not counting catch-ups.

Hitting the cap takes real income. After a full 2027 deferral, the employer share must reach $49,500 to fill the overall limit. At the 20% rate, that takes $247,500 of 2027 net earnings after the half-self-employment-tax deduction, so Schedule C profit for 2027 would need to be well above $250,000.

The worksheet for this math is in IRS Publication 560, in the section for self-employed people.

A plan may now let you treat employer contributions as Roth. You then pay income tax on them for the year they go in.

Example: You are a 45-year-old freelance consultant with $100,000 of net profit in 2027. Your self-employment tax is about $14,130, and half of it is about $7,065.

That leaves 2027 adjusted earnings of about $92,935. The employer share at the self-employed rate is about $18,587.

Add your full 2027 employee deferral and about $44,087 goes into the plan. At 55 you could add the regular 2027 catch-up, for about $52,587.

Many gig workers also have a day job with a 401(k), and your deferral limit is shared across both plans. If you defer the full 2027 limit at work, you have no deferral room left in the Solo 401(k).

You can still make the employer profit-sharing contribution from your side business. A separate overall cap for 2027 applies to each unrelated employer's plan.

Deadlines differ by type of money. Employer contributions are due by your tax-return due date, including extensions. For 2026, that means April 15, 2027, or the extended date.

In an ongoing plan, your deferral election must be in place by December 31 of the year. Contributing after December 31 is possible only in limited cases.

A newer rule helps first-time savers. Under the SECURE 2.0 Act, a sole proprietor or single-member LLC owner with no employees can open a new Solo 401(k) after December 31. The plan can be set up as late as the tax-return due date, not counting extensions, and employee deferrals still count for that first plan year. In later years, the normal deferral-election timing applies.

Employer Matching and Contributions – How They Affect Your Limit

Employer money goes into your account on top of what you defer. It does not come out of your paycheck, and it follows its own rules.

• How a match works: a common formula is 50% of the first 6% of pay you defer. On $60,000 of 2027 pay, you defer $3,600 and your employer adds $1,800.
• Your limit is untouched: the match never counts toward your own 2027 deferral limit.
• The total still applies: the match, nonelective and profit-sharing money all count toward the overall 2027 limit. Most employees never come close to it.
• Roth employer money: a plan may now let you take matching or nonelective contributions as Roth. They are taxable to you in the year the employer makes them.
• Student loan match: a plan may treat your qualified student loan payments as if they were deferrals, so you earn the match while paying down debt.
• Vesting: employer money may take a few years of service to become fully yours. Your own deferrals are always yours.

The IRS page on 401(k) contribution limits confirms the split between your deferral limit and the overall limit.

Timing can cost you match dollars. Say you front-load your deferrals and reach the 2027 limit by September 2027. With a per-paycheck match and no year-end true-up, you may get no match from October through December. Ask whether your plan has a true-up, and if it does not, spread your deferrals across every pay period.

Defer at least enough to collect the whole match. The rules on whether the limit includes employer match dollars matter most once you save beyond that point.

High Earners and Multiple Plans: Special Rules and Strategies

Higher pay and more than one plan bring extra rules. They often decide whether maxing out as a high earner works the way you expect.

• One deferral cap across jobs: the 2027 deferral limit is per person, not per plan. Each employer sees only its own plan, so you track the total yourself.
• 403(b) plans: deferrals to a 403(b) and a 401(k) count toward one shared limit.
• SIMPLE plans: deferrals to a Savings Incentive Match Plan for Employees (SIMPLE) IRA or SIMPLE 401(k) count toward the same personal cap. The SIMPLE's own limit is lower: $17,000 for 2026 and $17,500 for 2027.
• 457(b) plans: a governmental 457(b) has its own separate limit for 2027, equal to the 401(k) deferral limit. You can defer the full amount to it and to a 401(k) or 403(b).
• Roth catch-up rule: higher earners' catch-ups must go in as Roth, as the section above explains.

Plans must pass yearly fairness tests so they do not favor the highest-paid workers. For the 2027 plan year, you are a highly compensated employee if you earned more than $160,000 from the employer in 2026 or own more than 5% of the business. Earning more than $170,000 in 2027 makes you one for the 2028 plan year.

If lower-paid coworkers save very little, the plan may cap your deferrals below the IRS limit or refund part of them after the year ends, and that refund is taxable.

A safe harbor plan avoids the problem. The employer commits to a set contribution, such as 3% of pay for everyone in the 2027 plan year, and highly compensated employees can then defer up to the full limit.

A plan can count only so much of your pay: $360,000 for 2026 and $375,000 for 2027. Say you earn $500,000 in 2027 and elect to defer 10%. The plan applies it to the capped pay, which gives $37,500, and the 2027 deferral limit then stops you well below that. A 4% match for 2027 is also figured on the capped pay.

Some plans allow after-tax contributions beyond your regular deferrals. You can then convert that money to Roth, a move often called the mega backdoor Roth.

Say you defer the full 2027 limit and your employer adds a $10,000 match. That puts $35,500 in your account and leaves $39,500 of after-tax room under the overall limit for 2027. Not every plan allows this, so check your plan document first.

Nuances Across States – Does Your State Affect 401(k) Contributions?

Federal law governs 401(k) plans, so the contribution limits and federal tax benefits are the same everywhere.

State tax laws still change how much a contribution saves you. States differ on whether they tax your contributions now or your withdrawals later. Here are a few examples:

State	State income tax on 401(k) contributions?	State tax on 401(k) withdrawals in retirement?	Nuances and notes
California (and most states with an income tax)	No. California follows federal treatment, so traditional contributions are excluded from income. Roth contributions are after-tax.	Yes. Traditional withdrawals are taxed as income. Qualified Roth withdrawals are tax-free.	High state rates make the upfront break valuable. No special exclusion for retirement income.
Pennsylvania	Yes, unlike federal. Pennsylvania does not exclude 401(k) contributions from state taxable income.	No, for qualified distributions after retirement age.	Taxed going in, tax-free coming out. For state tax, the 401(k) acts a bit like a Roth.
Illinois	No. Illinois allows the federal exclusion, so contributions are pre-tax at the state level too.	No. Illinois does not tax distributions from 401(k)s, IRAs or pensions.	A double benefit for traditional savings: a break now and no state tax later.
Texas (and other states with no income tax)	Not applicable. There is no state income tax.	Not applicable. No state tax on withdrawals either.	Pre-tax versus Roth is purely a federal question here.
New Jersey	No. New Jersey excludes pre-tax 401(k) contributions from state income, unlike its treatment of IRAs.	Yes. Withdrawals are generally taxed to the extent they were tax-deferred.	New Jersey follows federal rules for 401(k)s but gives no deduction for traditional IRA contributions.

The federal pattern of a tax break now and tax later usually carries over to your state, but not always.

In a high-tax state, the savings stack up. In 2027, a California resident in a 9% state bracket and a 24% federal bracket saves roughly 33% on each pre-tax dollar. That person pays California tax on withdrawals later.

A Pennsylvania resident in that 2027 example saves only the 24% federal tax. No state tax is due in retirement, which can tilt the choice between traditional and Roth.

Most other 401(k) rules are uniform because of the Employee Retirement Income Security Act (ERISA). That federal law shields 401(k) assets from creditors in every state, including in bankruptcy, as the Supreme Court confirmed in Patterson v. Shumate, while IRA protection varies by state.

State-run IRA programs for workers without an employer plan do not change 401(k) limits. They show that states want people to save.

The amount you can contribute is set by federal law. Your take-home pay and the tax on your withdrawals depend on your state, so weigh both when you choose between traditional and Roth.

Comparing 401(k)s with Other Retirement Accounts

Some accounts share the 401(k) deferral limit, and some have room of their own.

• 403(b): public schools, hospitals and nonprofits offer these in place of a 401(k), with the same shared 2027 deferral limit. Some plans add an extra catch-up for workers with 15 years at the same employer.
• 457(b): governmental 457(b) plans have the same 2027 dollar limit, but it is separate from your 401(k) or 403(b) limit.
• SIMPLE IRA and SIMPLE 401(k): the 2027 limit is $17,500, plus a $4,000 catch-up at 50 or older or $5,250 at ages 60 to 63. These deferrals count toward your shared personal limit.

An IRA holds far less. The IRA contribution limit is $7,500 for 2026 and for 2027, plus a $1,100 catch-up at 50 or older.

A 401(k) at work does not reduce what you can put in an IRA, but it can reduce what you deduct. For 2027, the traditional IRA deduction for covered workers phases out between $83,000 and $93,000 of income for single filers and between $133,000 and $153,000 for married couples filing jointly.

Roth IRA contributions have their own income test. For 2027 they phase out between $158,000 and $173,000 for single filers, and between $250,000 and $260,000 for joint filers.

Self-employed people often weigh a Solo 401(k) against a Simplified Employee Pension (SEP) IRA. A SEP can take up to the same overall limit for 2027, but only as employer money: 25% of W-2 pay, or the lower self-employed rate. There is no employee deferral.

That gap matters at modest incomes. With $50,000 of net profit in 2027, the employer share is about $9,294 after the half-self-employment-tax deduction, and a SEP stops there. A Solo 401(k) allows the full 2027 employee deferral plus that same $9,294, for about $34,794, and it allows catch-ups.

A SEP is simpler to run. A Solo 401(k) must file Form 5500-EZ once plan assets pass the filing threshold in the form's instructions at the end of a plan year.

Starting with 2027 contributions, the federal Saver's Match pays half of up to $2,000 you save per person, for a match of up to $1,000. It is deposited into an eligible 401(k), 403(b), governmental 457(b) or IRA and claimed on the 2027 return with Form 8880-A. For 2027 the full match goes to incomes up to $41,000 for joint filers, $30,750 for head of household and $20,500 for single filers. It phases out at $71,000, $53,250 and $35,500.

Common Mistakes to Avoid When Contributing to Your 401(k)

The mistake the title warns about is over-deferring across two plans in one year.

If your deferrals top the 2027 limit, or your higher limit at 50 or older, you have an excess deferral. Tell one plan right away and ask for the excess and its earnings back.

The deadline to get a 2027 excess out is April 15, 2028. A filing extension does not move it, as the IRS page on excess deferrals explains.

Fix it on time and a 2027 excess is taxed once, for 2027, the year you deferred it. The earnings are taxed in the year the plan pays them out.

Miss the deadline and the 2027 excess is taxed twice: once for 2027 and again when you finally withdraw it.

These other mistakes cost savers money too:

• Missing the match: deferring less than the match formula asks for gives up part of your pay.
• Leaving a flat dollar amount in place: someone who set a flat amount equal to the 2026 limit must raise it to reach the 2027 limit. A percentage of pay adjusts on its own.
• Skipping the catch-up: the 2027 catch-up is larger at ages 60 to 63 than at 50 to 59. At 64 you revert to the regular catch-up.
• Assuming catch-ups stay pre-tax: for 2027, your catch-up must be Roth if your 2026 FICA wages from that employer topped the Roth catch-up wage threshold.
• Front-loading without a true-up: maxing out early in the year can cost you match dollars in later pay periods.
• Using the old Solo 401(k) deadline: a first-year plan can still be opened after year-end, as the Solo 401(k) section explains.
• Cashing out when you leave a job: rolling the balance over avoids the taxes and penalties a cash-out brings, and large loans or hardship withdrawals also set back your savings.
• Never rebalancing: check your investment mix once a year.
• Holding too much employer stock: spread your money across several funds.

The late-setup rule covers only a plan's first year. The rules on contributing after December 31 show which dollars can still go in for later years.

Examples: How Different Workers Maximize Their 401(k) Contributions

These six scenarios use the 2027 limits.

1. Early-career employee (age 30, salary $50,000)

Jane defers 10% of her 2027 pay, or $5,000. Her employer matches 100% of the first 4% of pay, adding $2,000 for 2027, so $7,000 goes in.

That is far below the 2027 limit, but she captures the whole match. She plans to raise her rate with each raise, aiming for 15% of pay.

2. Mid-career saver (age 40, salary $120,000)

John wants to max out. He spreads the full 2027 limit across the year, about $2,125 a month.

His employer uses the common match formula, which adds $3,600 for 2027, plus $12,000 in profit sharing. John's 2027 total is $41,100, well under the overall limit.

3. High earner with highly compensated employee limits (age 45, salary $300,000)

Maria's plan once failed testing, and part of her deferrals came back as a taxable refund. Her company then switched to a safe harbor plan with a guaranteed match.

Now she can defer the full 2027 limit. In 2027 she puts $15,000 in pre-tax and $10,500 in Roth to spread her tax risk.

Her 2027 safe harbor match on $300,000 of pay is $12,000. Her pay is under the 2027 compensation cap, so all of it counts.

4. Day job plus side gig (age 51, $80,000 salary and $20,000 freelance profit)

Alex defers $4,000 of his 2027 pay at work and earns a $3,200 match. He also opens a Solo 401(k) for his freelance work.

His Solo deferral cannot exceed his net self-employment earnings after the half-self-employment-tax deduction. On $20,000 of 2027 profit, that is about $18,587.

He defers that full amount, so his 2027 deferrals total $22,587. That leaves his catch-up untouched. To use his full 2027 limit for age 50 and older, he would raise his day-job deferral to $15,413.

The Roth catch-up rule does not reach him, because his $80,000 of 2026 wages is under the threshold.

5. Small business owner (age 55, $300,000 net profit)

Linda runs a consulting LLC with no employees. For 2027 she defers the full limit and adds the catch-up for age 50 and older.

At the self-employed rate on net earnings after the half-self-employment-tax deduction, her 2027 employer share would be roughly $57,000, more than her room. The overall limit leaves $49,500 for the employer share, so she contributes $49,500.

Her 2027 total is $83,500, the most a 55-year-old can put in. Linda has no FICA wages, so her catch-up can stay pre-tax.

6. Late-career employee (age 62, 2026 wages of $180,000)

Sam is 62 at the end of 2027. He defers the full limit plus the catch-up for ages 60 to 63, which takes him to his age group's ceiling for 2027.

His 2026 wages from this employer topped the Roth catch-up wage threshold, so his whole 2027 catch-up must go in as Roth.

What to do next

1. Find your 2027 limit in the birth-year table near the top of this article.
2. Add up your year-to-date deferrals from every employer's pay stub if you had two jobs this year.
3. Compare Box 3 of your 2026 Form W-2 with the Roth catch-up wage threshold if you will be 50 or older in 2027.
4. Ask your plan whether it offers Roth deferrals and a year-end match true-up.
5. Update your payroll election in January so a flat dollar amount matches the new limit.

FAQ

What is the maximum 401(k) contribution for 2026 and 2027?

For 2026 the employee limit is $24,500, or $32,500 at 50 or older and $35,750 at ages 60 to 63. For 2027 it is $25,500, or $34,000 and $37,250. The limit is per person across all 401(k), 403(b) and SIMPLE plans.

How much can I contribute to my 401(k) if I'm over 50?

You get the regular limit plus a catch-up. Your own ceiling for each year is the regular limit plus that catch-up, and both rise for 2027, as the table above shows. Your age on December 31 of the year decides which one applies. Higher earners over the Roth catch-up wage threshold must make the catch-up as Roth.

Do employer matches count toward the 401(k) contribution limit?

No, not toward your own deferral limit. You can defer the full amount and keep every matching dollar. The match does count toward the overall 2027 limit on all money going into your account, before catch-ups.

Can I max out two 401(k) plans in the same year (two jobs)?

You can join both plans, but your own deferrals to the two together cannot exceed the 2027 deferral limit. You may split that amount between them. Employer money is separate: each unrelated employer's plan has its own overall cap for 2027.

What happens if I contribute too much to my 401(k)?

Tell your plan administrator as soon as you can. The excess and its earnings must come out by April 15 of the next year. The refunded excess is taxed in the year you deferred it, and its earnings in the year they are distributed. An uncorrected excess is taxed twice.

Is there an income limit for contributing to a 401(k)?

No. No income level bars you from a 401(k), and there is no phase-out like the one for Roth IRAs. Very high earners may be held back by highly compensated employee testing or the $375,000 compensation cap for 2027. Earners over the Roth catch-up wage threshold must make catch-ups as Roth.

How much should I contribute to my 401(k)?

Contribute at least enough to earn the full employer match, if one is offered. Many advisors suggest aiming for 10% to 15% of your salary, or the maximum if you can afford it. The right amount depends on your retirement goals and budget, but more is generally better, up to the IRS limit.

Can I contribute to a 401(k) and an IRA in the same year?

Yes. The limits are separate. The IRA limit is $7,500 for 2026 and 2027, plus $1,100 at 50 or older. For 2027, the deduction for covered workers phases out at $83,000-$93,000 (single) and $133,000-$153,000 (joint). Roth IRA eligibility phases out at $158,000-$173,000 and $250,000-$260,000.

Do Roth 401(k) contributions count toward the same limit as traditional?

Yes. Traditional and Roth 401(k) deferrals share one limit for 2027, before catch-ups. You can split it any way your plan allows, but the two together cannot go over it.

What is the total 401(k) contribution limit including employer contributions?

For 2026 the total from you and your employer is $72,000, or $80,000 at 50 or older and $83,250 at ages 60 to 63. For 2027 it is $75,000, or $83,500 and $86,750. The total can never exceed 100% of your compensation.