401(k) Calculator 2026 —Free Retirement Savings & Growth Estimator
Use our free 401(k) retirement calculator to see how your savings grow with employer matching, compound interest, and inflation-adjusted projections. Updated for 2026 IRS limits.
Updated May 5, 2026 Reviewed by the Best 401(k) Calculator Editorial Team · Aligned with IRS Notice 2025-82
Quick start: Project your 401(k) growth below using current age, salary, and contribution percentage. Need a different angle? See the Employer Match Calculator if you're optimizing free-money capture, the Paycheck Impact Calculator if you want take-home effect, or the 2026 IRS limits guide for cap-related questions.
Calculate Your 401(k) Balance at Retirement
Enter your details below to estimate how much your 401(k) will be worth when you retire.
401(k) Growth Visualization —Balance Over Time
Year-by-Year 401(k) Balance Breakdown Table
| Age | Salary | Your Contribution | Employer Match | Growth | Balance |
|---|
How to Use This 401(k) Calculator
Our 401(k) retirement savings calculator helps you estimate how much money you'll have when you retire. Here's how to get the most accurate results:
Basic Inputs: Age, Salary, Contribution Rate & Current Balance
You only need four pieces of information to get started:
- Current Age: Your age as of this calendar year.
- Annual Salary: Your gross annual income from your employer before taxes and deductions.
- Contribution Rate: The percentage of your salary you contribute to your 401(k) each pay period.
- Current Balance: The total amount currently in all your 401(k) accounts (including previous employers).
Advanced Settings: Inflation Rate, Salary Growth & Catch-Up Contributions
Click "Advanced Options" to fine-tune your projection with additional factors:
- Retirement Age: When you plan to stop working (default: 67, the full Social Security retirement age for those born after 1960).
- Expected Return: Your estimated annual investment return. A diversified portfolio has historically returned 7-10% before inflation.
- Salary Growth: The annual percentage increase in your salary (average is 3-4% per year).
- Inflation Rate: Used to show your balance in today's purchasing power. The historical average is about 3%.
- Tiered Employer Match: If your employer uses a stepped matching formula (e.g., 100% on first 3%, then 50% on next 2%), enter both tiers for accurate results.
What Are the 2026 401(k) Contribution Limits Set by the IRS?
The IRS adjusts 401(k) contribution limits annually. Here are the current limits for 2026:
| Category | 2024 | 2025 | 2026 |
|---|---|---|---|
| Employee Contribution (Under 50) | $23,000 | $23,500 | $24,500 |
| Catch-Up (Age 50-59, 64+) | $7,500 | $7,500 | $8,000 |
| Super Catch-Up (Age 60-63) | N/A | $11,250 | $11,250 |
| Total Employee (Under 50) | $23,000 | $23,500 | $24,500 |
| Total Employee (Age 50+) | $30,500 | $31,000 | $32,500 |
| Total Employee (Age 60-63) | N/A | $34,750 | $35,750 |
| Employee + Employer Combined | $69,000 | $70,000 | $72,000 |
Source: IRS.gov —401(k) Contribution Limits
How Should You Read Your 401(k) Calculator Results?
What Is the 4% Rule?
The 4% rule is a widely-used guideline suggesting you can withdraw 4% of your retirement savings each year without running out of money over a 30-year retirement. For example, if your 401(k) balance at retirement is $1,000,000, you could withdraw approximately $40,000 per year ($3,333 per month). This calculator shows your projected monthly income using both the 4% rule and an annuity-based approach.
Why Inflation Adjustment Matters
A million dollars today won't buy the same amount of goods in 30 years. Our inflation adjustment feature shows your retirement balance in today's purchasing power, helping you understand what your savings will actually be worth. At 3% inflation, $1 million in 30 years has the purchasing power of approximately $412,000 today.
How Compound Interest Works in a 401(k)
Compound interest is the single most powerful force in retirement savings. Your 401(k) earns returns not just on your contributions, but also on all the returns already accumulated. This is why starting early is so critical —even small contributions in your 20s can grow to significant amounts by retirement.
Editorial Benchmark: 30-Year Value of 8 Real-World Employer Match Formulas
To make the abstract idea of "free money" tangible, our editorial team modeled eight common employer match formulas we have collected from public 401(k) summary plan descriptions (Fortune 500 + mid-cap employers, sampled 2024–2025). Each scenario assumes the same baseline: $75,000 starting salary, age 30 to 65, 7% annual return, 3% salary growth, employee contributes the maximum percentage needed to capture the full match. We ran every formula through this site's calculation engine to project the 30-year nominal value of just the employer-funded portion (excluding your own contributions and excluding investment growth on your contributions).
| # | Match Formula (Common Naming) | Year-1 Match | Year-1 Match as % of Salary | 30-Year Match Value (Compounded) |
|---|---|---|---|---|
| 1 | 100% on first 6% (Generous full match) | $4,500 | 6.0% | $566,400 |
| 2 | 100% on first 5% + 50% on next 2% (Microsoft-style tiered) | $4,500 | 6.0% | $566,400 |
| 3 | 100% on first 4% (Common federal civilian-style) | $3,000 | 4.0% | $377,600 |
| 4 | 100% on first 3% + 50% on next 2% (Safe Harbor enhanced) | $3,000 | 4.0% | $377,600 |
| 5 | 50% on first 6% (Most common partial match) | $2,250 | 3.0% | $283,200 |
| 6 | 3% nonelective Safe Harbor (No employee deferral required) | $2,250 | 3.0% | $283,200 |
| 7 | 50% on first 4% (Lean partial match) | $1,500 | 2.0% | $188,800 |
| 8 | 25% on first 6% (Conservative match) | $1,125 | 1.5% | $141,600 |
What this tells you: The spread between the most generous and least generous formula is $424,800 over 30 years — for the same $75K starting salary. If you can choose between two job offers with otherwise comparable pay, the match formula alone can shift retirement outcomes by half a million dollars. Use the Employer Match Calculator to plug in your own plan's exact tiers, or run the full retirement projection above with your match details to see the combined effect.
Methodology: Future value of an annuity formula applied to year-by-year projected match dollars, compounded monthly at 7%/12. Salary grows 3% annually. Excludes your own contributions and any growth on them. Source: Best401kCalculator.com Editorial Team modeling, May 2026, using formulas observed in published Fortune 500 and mid-cap employer SPDs.
How Does a 401(k) Work?
A 401(k) is an employer-sponsored retirement savings plan named after Section 401(k) of the Internal Revenue Code. Here's how it works:
Tax Advantages
With a traditional 401(k), your contributions are made with pre-tax dollars. This reduces your taxable income for the year, lowering your current tax bill. The money grows tax-deferred, and you pay ordinary income taxes only when you withdraw it in retirement —typically when your tax rate is lower.
With a Roth 401(k), contributions are made with after-tax dollars (no upfront tax break), but qualified withdrawals in retirement are completely tax-free. Use our Roth 401(k) Calculator to compare which option is better for your situation.
Employer Matching Contributions
Many employers match a portion of your 401(k) contributions —this is essentially free money added to your retirement savings. Common matching formulas include:
- Dollar-for-dollar match up to 3-6% of salary: If you contribute 5% of your $80,000 salary ($4,000), your employer also contributes $4,000.
- 50 cents on the dollar up to 6%: If you contribute 6% of $80,000 ($4,800), your employer adds $2,400.
- Tiered match: 100% match on first 3% of salary, then 50% match on the next 2% (our calculator supports this!).
Vesting Schedules
While your own contributions are always 100% yours, employer matching contributions may be subject to a vesting schedule. This means you must work at the company for a certain number of years before you fully own the employer's contributions. Common vesting schedules include:
- Immediate vesting: You own 100% of employer contributions right away.
- Graded vesting: You gradually earn ownership (e.g., 20% per year over 5 years).
- Cliff vesting: You become 100% vested after a specific period (e.g., 3 years).
How Should You Invest Your 401(k) Money by Age?
Asset Allocation by Age
A common rule of thumb is to subtract your age from 110 to determine the percentage of your portfolio that should be in stocks. For example, a 30-year-old might allocate 80% to stocks and 20% to bonds. As you approach retirement, you should gradually shift toward more conservative investments.
Average 401(k) Returns by Investment Type
- Stock Index Funds (S&P 500): ~10% average annual return (historical)
- Balanced Funds (60/40 stocks/bonds): ~7-8% average annual return
- Bond Funds: ~4-5% average annual return
- Target-Date Funds: ~6-8% average annual return (varies by target date)
- Money Market Funds: ~2-4% average annual return
For a deeper analysis, see our Average 401(k) Returns Guide.
401(k) Guides & Resources
Dive deeper into 401(k) planning with our comprehensive guides:
- 2026 401(k) Contribution Limits —Complete breakdown of employee, catch-up, and employer contribution caps.
- 401(k) vs Roth IRA —Side-by-side comparison to help you choose the right retirement account.
- Average 401(k) Rate of Return —Historical performance data and realistic expectations for your investments.
- 401(k) Balance by Age —See how your savings compare to national averages and get tips if you're behind.
- 401(k) Planner Guide —Step-by-step savings strategy by age, salary, and retirement goal.
- 401(k) Cash Out Guide —Full breakdown of taxes, penalties, net payout, and smarter alternatives.
- RMD Rules Guide —Required Minimum Distribution rules for 401(k) and IRA accounts.
401(k) Calculator FAQ —Common Questions About Retirement Savings
Financial experts generally recommend contributing 10-15% of your gross salary to your 401(k). At minimum, you should contribute enough to receive your full employer match —anything less means you're leaving free money on the table.
In 2026, you can contribute up to $24,500 (under age 50), $32,500 (age 50-59 and 64+), or $35,750 (age 60-63). If you can't afford the maximum, start with what you can and increase by 1% each year.
For 2026, the IRS has set the following 401(k) contribution limits:
- Under age 50: $24,500 employee contribution / $72,000 total (employee + employer)
- Age 50-59 and 64+: $32,500 employee / $80,000 total (includes $8,000 catch-up)
- Age 60-63: $35,750 employee / $83,250 total (includes $11,250 super catch-up)
These limits apply to the combined total of all your 401(k) plans if you have multiple employers. Employer contributions do not count toward the employee limit but are included in the combined total.
The average 401(k) rate of return depends on your investment mix. Historically:
- Aggressive portfolio (80%+ stocks): 8-10% average annual return
- Balanced portfolio (60/40 stocks/bonds): 7-8% average annual return
- Conservative portfolio (mostly bonds): 4-6% average annual return
The S&P 500 has averaged approximately 10% per year over the past 50+ years, but past performance does not guarantee future results. Most financial planners recommend using 6-7% as a conservative estimate for long-term projections.
Yes, but early withdrawals typically incur a 10% penalty on top of regular income taxes. This means you could lose 30-40% of your withdrawal amount to taxes and penalties combined.
Exceptions that may waive the 10% penalty include:
- Separation from service at age 55 or older (the "Rule of 55")
- Qualifying disability
- Substantially Equal Periodic Payments (SEPP / IRS Rule 72(t))
- Qualified Domestic Relations Order (QDRO) from divorce
- Unreimbursed medical expenses exceeding 7.5% of AGI
Use our Early Withdrawal Calculator to see exactly how much you'd receive after taxes and penalties.
Employer matching means your company contributes additional money to your 401(k) based on your own contributions. For example, a common match is 50% of your contributions up to 6% of salary.
If you earn $80,000 and contribute 6% ($4,800), your employer adds 50% of that —$2,400 —for a total annual contribution of $7,200. That employer match is essentially a guaranteed 50% return on your money before any investment gains.
Visit our Employer Match Calculator to find the optimal contribution rate that maximizes your employer's free money.
While both are defined contribution retirement plans under the IRS tax code, they serve different populations:
- 401(k): Available to private-sector employees with voluntary pre-tax or Roth contributions.
- 401(a): Primarily for government, educational institutions, and non-profit organization employees. May include mandatory employer contributions and stricter vesting schedules.
If you work for a government agency, school district, or non-profit, you may need our 401(a) Calculator for more accurate projections tailored to your plan type.
Starting at age 73 (under the SECURE 2.0 Act), you must begin taking minimum distributions from your traditional 401(k) each year. The amount is calculated by dividing your account balance by an IRS life expectancy factor.
Failing to take your RMD results in a 25% penalty on the amount not withdrawn (reduced from 50% under prior law). Use our RMD Calculator to determine your required distribution amount.