Use the Tuff Search 401k calculator to see exactly how your retirement savings will grow over time. Enter your current age, salary, contribution rate, and employer match to get an instant projection of your 401k balance at retirement. All results are updated with the latest 2026 IRS contribution limits.
This calculator has been reviewed for accuracy against IRS Publication 560 and the official 2026 contribution limit guidelines. It is intended for informational and planning purposes only. Please consult a certified financial planner (CFP) for personalized retirement advice.
How to use this calculator: Enter your current age, planned retirement age, current 401k balance, annual contribution, employer match percentage, expected annual return, and contribution growth rate. Your projected retirement balance will update automatically.
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The Internal Revenue Service (IRS) sets annual limits on how much you can contribute to a 401k plan. For 2026, those limits are as follows:
Who This Applies To | 2026 Contribution Limit |
Under age 50 | $24,500 |
Age 50 or older (catch-up contribution included) | $32,500 |
Ages 60–63 (super catch-up contribution included) | $35,750 |
Combined employee + employer maximum | $72,000 or 100% of compensation, whichever is less |
Important: The 2026 employee deferral limit increased from $23,500 in 2025 to $24,500 in 2026. Employer contributions do not count toward the employee deferral limit, but they do count toward the combined $72,000 cap. Source: IRS.gov – 401(k) contribution limit announcements.
A 401(k) is a tax-advantaged retirement savings account sponsored by an employer under Section 401(k) of the Internal Revenue Code. It is classified as a defined contribution plan, meaning your retirement balance depends on how much you and your employer contribute and how those investments perform over time.
Here is how a 401(k) works in practice:
There are two types of 401(k) accounts. The core difference between them is when you pay taxes:
Feature | Traditional 401(k) | Roth 401(k) |
Tax treatment on contributions | Pre-tax (reduces taxable income now) | After-tax (no tax reduction now) |
Tax treatment on withdrawals | Taxed as ordinary income at withdrawal | Tax-free in retirement |
2026 contribution limit | $24,500 (under age 50) | $24,500 (under age 50) |
Required Minimum Distributions (RMDs) | Yes, beginning at age 73 | No RMDs during the owner’s lifetime |
Best if you expect… | A lower tax rate in retirement | A higher tax rate in retirement |
Which is better — Traditional or Roth 401k? If you expect to be in a lower tax bracket when you retire than you are today, a Traditional 401k will typically save you more money. If you expect your tax rate to be higher in retirement — which is common for younger professionals early in their careers — a Roth 401k is often the better choice. A financial advisor can model both scenarios for you based on your specific income and retirement timeline.
Employer matching is one of the most valuable features a 401k offers. When your employer matches your contributions, they add money to your retirement account on your behalf — up to a defined percentage of your salary.
Assume you earn $60,000 per year and your employer offers a 50% match on contributions up to 6% of your salary:
Key rule: Always contribute at least enough to capture your full employer match. Failing to do so is leaving part of your compensation on the table. Most financial planners recommend maximizing the employer match before contributing to any other retirement account.
Many employers require a vesting period before their matching contributions are fully owned by the employee. Common vesting structures include:
Review your Summary Plan Description (SPD) or speak with your HR department to confirm your employer’s vesting schedule before making any job change decisions.
This calculator uses the standard future value of an annuity formula combined with compound interest growth to project your 401k balance at retirement. The core calculation is as follows:
Future Value Formula:
FV = PV × (1 + r/n)^(n×t) + PMT × [((1 + r/n)^(n×t) − 1) / (r/n)]
Where each variable represents the following:
About the return rate assumption: The calculator uses the expected annual return rate you enter. Historically, a diversified 401k portfolio invested in broad index funds has returned between 5% and 10% per year before adjusting for inflation. Many financial planners use 6–7% as a conservative planning estimate. Note that the calculator does not adjust for inflation by default — a projected balance of $1.5 million in 30 years will have less purchasing power than $1.5 million has today.
The following end-to-end example shows how these variables interact in a realistic planning scenario:
Input | Value Used |
Current age | 30 years old |
Planned retirement age | 65 |
Current 401k balance | $5,000 |
Annual salary | $65,000 |
Employee contribution rate | 6% ($3,900 per year) |
Employer match | 50% up to 6% of salary ($1,950 per year) |
Total annual contribution | $5,850 |
Expected annual return | 7% |
Compounding frequency | Monthly |
Years to retirement | 35 |
Projected result at age 65: Approximately $870,000–$950,000, depending on compounding frequency and any annual contribution growth. Roughly 35–40% of that total would come from employer matching funds compounding over time — a clear illustration of the long-term cost of not capturing the full employer match.
Starting at 25 vs. 35: With identical contributions, a person who begins saving at age 25 will typically accumulate 1.8 to 2 times more than someone who starts at 35. This is the mathematical effect of compound interest — your money earns returns on its own previous returns over a longer period.
You can begin taking withdrawals from a traditional 401k without incurring a penalty once you reach age 59½. Withdrawals taken before this age are subject to a 10% early withdrawal penalty in addition to ordinary income tax, which significantly reduces the value of early distributions.
Exceptions to the 10% early withdrawal penalty include certain medical expenses, permanent disability, qualified domestic relations orders (QDROs), separation from service after age 55, and IRS tax levies. These exceptions are narrowly defined. Consult a tax professional before taking any early withdrawal.
Once you reach age 73, the IRS requires you to take a minimum annual withdrawal from your traditional 401k account. This is known as a Required Minimum Distribution (RMD). The RMD amount is calculated each year based on your account balance and the IRS life expectancy tables. Failing to take the required amount results in a 25% excise tax on the portion you should have withdrawn.
Roth 401k accounts held by the original owner are not subject to RMDs during the owner’s lifetime, under the SECURE 2.0 Act, which took effect in 2024.
Your vested 401k balance is always yours. However, when you leave an employer, you have several options for what to do with it:
A direct rollover — in which funds move directly from one plan to another without passing through your hands — avoids mandatory withholding and any immediate tax liability.
Most 401k plans allow you to borrow up to 50% of your vested balance or $50,000, whichever is less. While a 401k loan avoids the early withdrawal penalty, it carries a significant hidden cost: the borrowed funds stop growing during the repayment period. Every dollar you borrow is a dollar that is no longer compounding toward your retirement.
If you leave your job while a 401k loan is still outstanding, the full remaining balance typically becomes due within 60 to 90 days. If you are unable to repay it, the outstanding amount is treated as a taxable distribution and is subject to ordinary income tax — plus the 10% early withdrawal penalty if you are under age 59½.
Self-employed individuals and small business owners who have no full-time employees other than a spouse are eligible to establish a Solo 401k — also referred to as an individual 401k or a self-employed 401k. The primary advantage is that you can contribute in two capacities: as both the employee and the employer.
This dual-contribution structure makes the Solo 401k one of the most powerful retirement savings vehicles available to freelancers, independent contractors, and sole proprietors.
Both 401k plans and Individual Retirement Accounts (IRAs) are tax-advantaged retirement savings vehicles. However, they serve different roles within a broader retirement strategy:
Factor | 401(k) | Traditional IRA / Roth IRA |
2026 contribution limit | $24,500 (under age 50) | $7,000 (under 50) / $8,000 (age 50+) |
Employer match available | Yes | No |
Investment options | Limited to plan offerings | Broad — stocks, ETFs, bonds, and mutual funds |
Income limits to contribute | None | Roth IRA has income phase-out limits |
RMD requirement (traditional) | Yes, starting at age 73 | Yes, starting at age 73 |
Early withdrawal flexibility | Limited | Roth IRA contributions (not earnings) can be withdrawn at any time |
General guidance: Most financial planners recommend contributing to your 401k up to the full employer match first, then maximizing an IRA (preferably a Roth IRA if you are eligible), and then returning to your 401k to work toward the full $24,500 limit — if your budget allows.
After running the calculator, you will receive a projected balance at retirement. The following section explains how to put that number into context.
A widely referenced retirement planning guideline known as the 4% rule suggests withdrawing 4% of your portfolio balance per year in retirement. When applied consistently, this approach is designed to sustain your income across a 30-year retirement period.
To estimate your annual retirement income from your 401k balance, use the following formula:
Annual income = Projected balance × 0.04
Examples:
Note: These withdrawal amounts are in addition to any Social Security benefits you receive. The Social Security Administration estimates that the average monthly retirement benefit in 2026 is approximately $1,900. Your total retirement income will equal your 401k withdrawals plus your Social Security benefit, plus any pension income or other savings.
A projected balance of $900,000 in 30 years will have significantly less purchasing power than $900,000 has today. At a 3% average annual inflation rate, $900,000 in 30 years would be equivalent to approximately $370,000 in today’s dollars. For more conservative long-term planning, consider using an inflation-adjusted return rate — calculated as your expected annual return minus 2.5% to 3% for inflation.
✓ 2026 IRS limits built in: Contribution limits reflect the current 2026 IRS announcement ($24,500 / $32,500 / $35,750).
✓ Transparent formula: Uses the standard future value of an annuity calculation — not a proprietary black box.
✓ Employer match modeling: Projects the long-term value of employer contributions separately from your own.
✓ Multiple compounding frequencies: Supports monthly, bi-weekly, quarterly, and annual compounding for more precise projections.
✓ Completely free, no account required: No sign-up, no email address, no subscription. Use it as many times as you need.
✓ Private by design: No data is stored or transmitted externally. All calculations are performed in your browser.
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The 2026 limit is $24,500 (under 50), $32,500 (age 50+), and $35,750 (ages 60–63). These apply to employee deferrals only and exclude employer matching contributions.
A 401(k) is an employer-sponsored, tax-advantaged retirement account. Pre-tax paycheck contributions are invested and grow tax-deferred until withdrawal. In 2026, employees can contribute up to $24,500. Many employers also match a portion of your contributions.
At minimum, contribute enough to capture your full employer match. Most financial planners recommend 10–15% of gross income toward retirement. The 2026 maximum is $24,500 (under 50) or $32,500 (age 50+). If you can’t reach the max, increase your rate by 1% each year.
Withdrawing before age 59½ triggers a 10% penalty plus ordinary income taxes. A $10,000 early withdrawal could cost $2,500–$4,000 in total. Exceptions include disability, certain medical expenses, and separation from service after age 55.
RMDs are mandatory annual withdrawals from traditional 401k accounts starting at age 73. The amount is based on your balance and an IRS life expectancy factor. Missing an RMD triggers a 25% excise tax. Roth 401k accounts are exempt from RMDs during the owner’s lifetime.
It depends on your tax situation. Traditional 401k reduces taxes now but is taxed at withdrawal. Roth 401k is taxed now but withdrawals are completely tax-free. If your employer offers both, many planners recommend splitting contributions between the two.
Your vested balance is always yours. You can leave it in the existing plan, roll it to your new employer’s 401k, roll it to a Traditional IRA, or cash out. Avoid cashing out — you’ll owe income tax plus a 10% penalty if under 59½. A direct rollover preserves all tax advantages.
Your investment returns get reinvested and generate their own returns — this is compounding. Over time, it dramatically accelerates balance growth. A $5,000 annual contribution at 7% grows to roughly $500,000 over 30 years, even though only $150,000 came from your own contributions.
A Solo 401k is for self-employed individuals and business owners with no full-time employees. You contribute as both employee (up to $24,500 for 2026) and employer (up to 25% of net self-employment income). The combined 2026 limit is $72,000.
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It uses the standard future value of an annuity formula with official 2026 IRS limits and variable compounding frequencies. Results are estimates — actual returns vary year to year. This tool supports planning decisions and does not replace professional financial advice.
Have a question about your results or need help using this calculator? Contact us — we’re happy to help.