How does employer 401(k) matching work?

A common match is 50% or 100% of your contributions up to 6% of your salary. For example, if you earn $70,000 and contribute 6% ($4,200), a 100% match gives you an extra $4,200 free. Always contribute at least enough to get the full match — it's free money.

What rate of return should I assume for my 401(k)?

Most financial planners use 6–7% as a conservative long-term average for a balanced 401(k) portfolio, accounting for inflation. The historical S&P 500 return is about 10% before inflation. Use 7% as a reasonable middle ground.

Can I withdraw from my 401(k) early?

Yes, but early withdrawals (before age 59½) are subject to a 10% penalty plus ordinary income taxes. There are exceptions for disability, substantial equal payments, and certain hardships. A Roth conversion or 72(t) distribution can sometimes avoid the penalty.

401(k) Calculator 2026 | ProCalcTools

Q: What is the 401(k) contribution limit for 2026?

For 2026, the IRS 401(k) employee contribution limit is $24,500. If you are age 50 or older, you can make an additional catch-up contribution of $8,000, for a total of $32,500.

Your 401(k) Details

Current Age

Retirement Age

Annual Salary $

Your Contribution Rate %

2026 limit: $24,500/year ($32,500 if age 50+)

Current 401(k) Balance $

Employer Match Rate %

E.g. 50 = employer matches 50 cents per your dollar

Employer Match Limit (% of salary) %

Expected Annual Return %

Inflation Rate %

How the 401(k) Calculator Works

Enter your current age, salary, contribution rate, and employer match details. The calculator uses compound growth formula to project your balance at retirement — including both your contributions and employer matching dollars.

2026 Contribution Limits (IRS)

For tax year 2026, the IRS allows employees to defer up to $24,500 per year into a 401(k). Workers aged 50 and older can contribute an additional $8,000 catch-up, for a total of $32,500. These limits apply to traditional and Roth 401(k) plans combined.

Always Capture the Full Employer Match

The most powerful 401(k) strategy for most Americans is contributing at least enough to get the full employer match. If your employer matches 50% up to 6% of salary, and you earn $70,000, that's a guaranteed $2,100/year in free money. Not contributing enough to get this is essentially leaving part of your salary on the table.

How to Use This Calculator

1
Enter your current age and target retirement age (typically 65 for full Social Security benefits)
2
Enter your annual salary and the percentage you contribute — start with at least your employer's match limit
3
Add your employer match rate and cap (check your plan documents or HR)
4
Use 7% return for a balanced portfolio or adjust based on your allocation
5
Click Calculate to see your projected nest egg and monthly retirement income

Worked Example: Employer Match and Long-Term Growth

Say you earn $80,000 and contribute 6% of your pay, or $4,800 per year. Your employer matches 50% of what you contribute, up to 6% of pay, which adds $2,400. Together that is $7,200 per year, or $600 per month. If that money earns an average of 7% per year for 30 years, it could grow to about $732,000, even though total contributions would be about $216,000. About a third of those contributions, roughly $72,000, would come from your employer's match. The 7% rate is an illustration only, and this example ignores raises, fees, and market ups and downs.

Traditional vs. Roth 401(k) and Vesting

With a traditional 401(k), contributions reduce your taxable income now and withdrawals in retirement are taxed as ordinary income. With a Roth 401(k), contributions are made with after-tax money, and qualified withdrawals in retirement are tax-free. Many plans offer both, and the better choice depends on whether you expect your tax rate to be higher or lower in retirement. Also check your plan's vesting schedule: employer contributions may not be fully yours until you have worked for a certain number of years, so leaving early can mean forfeiting part of the match. Ask your plan administrator for the exact match formula and vesting terms.

Prepared by the ProCalcTools editorial team and last reviewed in October 2026. This page is for general information and is not financial, tax, or medical advice.

Frequently Asked Questions

What is the 401(k) contribution limit for 2026?+

For 2026, you can contribute up to $24,500 per year. If you're 50 or older, you can add an $8,000 catch-up contribution for a total of $32,500. These limits are adjusted by the IRS annually for cost of living.

How does employer matching work?+

The most common match is 50%–100% of your contributions up to 4%–6% of your salary. For example, a 50% match up to 6% means if you put in 6% of your $70,000 salary ($4,200), your employer adds $2,100. Always contribute at least up to the match — it's an immediate 50–100% return.

What rate of return should I use?+

Most planners suggest 6–7% for a balanced mix of stocks and bonds. The historical S&P 500 average is about 10% before inflation. Use 7% as a reasonable estimate for long-term projections with a moderate-to-aggressive allocation.

Can I have both a 401(k) and a Roth IRA?+

Yes. Many financial planners recommend contributing to both. Max out your employer match in your 401(k) first, then contribute to a Roth IRA (2026 limit: $7,500 or $8,600 if 50+), then go back and max your 401(k) if you can afford it.