401(k) Calculator
Estimate your 401(k) growth with employer matching, contribution limits, and projected retirement income.
How to Use the 401(k) Calculator
What Is a 401(k)?
A 401(k) is an employer-sponsored retirement savings plan that lets you contribute a portion of your paycheck before taxes are taken out. Your money grows tax-deferred until you withdraw it in retirement.
Key Benefit: Many employers match a portion of your contributions — that's essentially free money added to your retirement savings.
Understanding Employer Match
Employer matching is the most powerful feature of a 401(k). Here's how it works:
Common Match Formulas
- • 50% match up to 6%: You contribute 6% of salary, employer adds 3%
- • 100% match up to 3%: You contribute 3%, employer adds 3%
- • 100% match up to 6%: You contribute 6%, employer adds 6% (generous!)
Example: 50% Match Up to 6%
Salary: $75,000 | Your contribution: 6% ($4,500) | Employer adds: 3% ($2,250)
Total annual contribution: $6,750 — you get $2,250/year in free money!
Rule #1: Always contribute at least enough to get your full employer match. Not doing so is leaving free money on the table.
2025 Contribution Limits
Under Age 50
$23,500
Employee contribution limit
Age 50+
$31,000
$23,500 + $7,500 catch-up
Age 60-63
$34,750
SECURE 2.0 super catch-up
SECURE 2.0 Act: Starting in 2025, workers aged 60-63 can contribute an extra $11,250 (instead of $7,500) as a "super catch-up" contribution.
How to Use This Calculator
- Enter your age and retirement age — Most people retire between 62-67
- Enter your current 401(k) balance — Check your latest statement
- Enter your annual salary — Your gross (pre-tax) income
- Set your contribution rate — The percentage of salary you contribute
- Enter employer match details — Check your plan documents for match rate and limit
- Adjust growth assumptions — 7% is a common long-term average for a balanced portfolio
401(k) Optimization Tips
- Always get the full employer match — it's an instant 50-100% return
- Increase your contribution by 1% each year when you get a raise
- Use low-cost index funds or target-date funds inside your 401(k)
- Don't cash out your 401(k) when changing jobs — roll it over
- Consider Roth 401(k) if you expect higher taxes in retirement
- Take advantage of catch-up contributions starting at age 50
Learn more: Read our comprehensive guide on
How to Max Out Your 401(k): Complete 2025 GuideLearn the strategies, contribution limits, and employer matching tactics to maximize your 401(k) and accelerate your path to retirement.
Frequently Asked Questions
Priority order: 1) Full employer match, 2) Pay off high-interest debt (>7%), 3) Build 3-6 month emergency fund, 4) Increase 401(k) toward $23,500 max (2025), 5) Open a Roth IRA.
Pro tip: Increase your rate by 1% each year with raises — you'll barely notice but it adds up to hundreds of thousands over a career.
Common formulas: Dollar-for-dollar up to 3%, 50 cents per dollar up to 6% (most common), or dollar-for-dollar up to 6%.
Example ($75K salary, 50% match up to 6%): You contribute 6% ($4,500), employer adds 3% ($2,250) = $6,750/year total. That's an instant 50% return. Over 30 years at 7% growth, the match alone becomes $227,000.
Total limit including employer contributions is $70,000 (or $77,500 for 50+). The SECURE 2.0 super catch-up is a temporary window for ages 60-63 — at 64, it drops back to $7,500.
Traditional: Tax deduction now, pay taxes on withdrawals. Best if you're in a high bracket now and expect lower in retirement.
Roth: No tax break now, but withdrawals are 100% tax-free. Best if you're in a lower bracket now or expect higher taxes later.
Guidelines: Early career under $80K — lean Roth. Peak earnings $150K+ — lean Traditional. Unsure? Split 50/50 for tax diversification. Employer match always goes into Traditional regardless.
1) Roll to new employer's 401(k) — no taxes/penalties, keeps things consolidated. 2) Roll to an IRA — most flexible, more investment options, use direct trustee-to-trustee transfer. 3) Leave with old employer — fine if low-cost funds, but can't contribute. 4) Cash out (AVOID) — income taxes + 10% penalty if under 59.5. Example: cashing $50K at 35 costs ~$17K in taxes/penalties and loses ~$330K in future growth.
401(k): Employer-sponsored, $23,500 limit (2025), may include employer match, limited fund options, no income limits.
IRA: Opened individually, $7,000 limit (2025), no match, unlimited investment options, Roth IRA has income limits ($150K single/$236K married).
Best strategy: 1) 401(k) up to employer match, 2) Max Roth IRA ($7,000), 3) Max 401(k) ($23,500) = $30,500+/year in tax-advantaged savings plus match.
Exceptions (no 10% penalty): Rule of 55 (leave job at 55+), 72(t) equal payments, total disability, medical expenses over 7.5% of AGI, or divorce-related orders.
Better alternative: 401(k) loans let you borrow up to 50% of your balance (max $50K) and repay yourself with interest — no taxes or penalties if repaid on time.
2025 limits: Age 50-59: extra $7,500/yr (total $31,000) | Age 60-63: extra $11,250/yr (total $34,750, SECURE 2.0) | Age 64+: extra $7,500/yr (total $31,000).
The math: Maxing catch-up from age 50-65 at 7% return adds ~$200,000 beyond standard contributions. Combined with peak earning years, ages 50-65 can be the most powerful savings period of your career.
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