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401(k) Retirement Calculator

Project your 401(k) retirement balance, employer match contributions, and compound interest growth. Free retirement planning calculator.

Verified Institutional Formula 100% Client-Side & Private Editorial Review: Quantitative & Engineering Protocol
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United States Only

A 401(k) is an employer-sponsored retirement savings plan governed by USA Internal Revenue Service (IRS) tax regulations. All calculations and employee contribution limits ($23,000 / $30,500 catch-up) are hardcoded in USD ($).

$
$

Employer Match Rules

Projected Balance at Age 65
$0.00

Estimated 401(k) portfolio after 35 years of compound growth.

Starting Balance
100.0%
Starting Balance:
$25,000.00
Your Total Contributions:
$0.00
Free Employer Match:
+$0.00
Total Compound Interest:
+$0.00
IRS Contribution Check: For tax year 2026, employee elective deferrals are capped at $23,500 ($31,000 for age 50+ catch-up). This calculator automatically caps annual employee contributions at IRS thresholds.

Analytical Logic

Maximize Your 401(k) & Secure Financial Freedom

A 401(k) plan is the cornerstone of American retirement planning. Sponsored by your employer, it allows you to automatically invest a portion of your paycheck before taxes while frequently benefiting from free matching contributions from your company.

Never Leave Free Employer Match Money on the Table

If your employer offers a match, contributing at least enough to capture 100% of that match is the highest-return financial decision you can make. An employer match of 50% represents an immediate, guaranteed 50% return on your investment before compound interest even begins to work.

The Compound Growth Mechanics

Balance(t) = Balance(t-1) × (1 + Return) + Contributions(t)
Where Contributions(t) = Min(IRS Limit, Salary × Employee%) + Min(Salary × Employee%, Salary × MatchLimit%) × Match%

FAQ

For tax year 2026, the IRS employee elective deferral limit for a 401(k) is $23,500 for individuals under age 50. If you are age 50 or older, you can make an additional catch-up contribution of $7,500, bringing your total allowable contribution to $31,000.
An employer match is when your company contributes additional money to your 401(k) based on how much you contribute. For example, a common match is '50% up to 6% of salary.' If you earn $100,000 and contribute 6% ($6,000), your employer contributes an extra 3% ($3,000) for free.
A Traditional 401(k) uses pre-tax contributions, lowering your current taxable income today, but your withdrawals in retirement are taxed as ordinary income. A Roth 401(k) uses after-tax dollars today, but all future growth and withdrawals in retirement are 100% tax-free. If you expect to be in a higher tax bracket in retirement, Roth is generally advantageous.
When you leave an employer, you have four main options: (1) Leave the money in your former employer's plan if permitted, (2) Roll over the balance directly into your new employer's 401(k), (3) Roll over the funds into an Individual Retirement Account (Rollover IRA) to maintain tax-deferred status and gain broader investment options, or (4) Cash out (which triggers income taxes plus a 10% early withdrawal penalty if under age 59½).
Vesting refers to ownership of your employer's matching contributions. While your own employee contributions are always 100% vested right away, employer match dollars often vest over a schedule (e.g., a 3-year cliff or 5-year graded schedule). If you leave your job before being fully vested, you may forfeit some or all of the employer match.

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Financial & Tax Disclaimer

The calculations, amortization schedules, and financial estimates provided by this tool are strictly for informational and educational purposes. They do not constitute formal investment, tax, legal, or accounting advice. Mortgage rates, loan terms, and tax brackets change frequently; always consult a certified financial planner (CFP), CPA, or licensed lending officer before making major financial commitments.

Editorial Standard: Rigorous formula verification & zero client-side tracking. Learn about our review process →
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