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401(k) Optimizer Calculator

Maximize your employer match and see the true cost of your retirement contributions.

Annual salary

Your contribution

% of salary

2024 limit: $23,000

Employer match rate

e.g., 50% means $0.50 per $1 you contribute

Match up to

% of salary

Employer stops matching after this

Contribution type

Your tax bracket

Federal + state marginal rate

Years to retirement

years

Expected annual return

Historical S&P 500: ~10%

401(k) Basics

A 401(k) is an employer-sponsored retirement account that lets you save pre-tax (Traditional) or after-tax (Roth) money. Many employers match a portion of your contributions—essentially free money that can dramatically boost your retirement savings.

2024 Contribution Limits

Employee contribution $23,000

Catch-up (age 50+) +$7,500

Total limit (with employer) $69,000

How to Use

1. Enter your annual salary
2. Set your contribution percentage
3. Enter your employer's match formula
4. Choose Traditional, Roth, or split
5. See if you're maximizing free money

Traditional vs Roth

Traditional 401(k)

• Tax deduction now, taxed in retirement
• Better if you're in a high tax bracket now

Roth 401(k)

• Pay taxes now, tax-free in retirement
• Better if you expect higher taxes later

FAQ

What's a typical employer match?

Common formulas include: 100% match up to 3%, 50% match up to 6%, or dollar-for-dollar up to 4-6%. Check your benefits package.

What if I change jobs?

Your contributions are always yours. Employer matches may have a vesting schedule (e.g., 3-5 years to fully own them). You can roll over to an IRA or new employer's plan.

Can I withdraw early?

Yes, but you'll pay income tax plus a 10% penalty before age 59½. Some hardship withdrawals and the Rule of 55 may waive the penalty.

Calculator Limitations

• Assumes constant salary and contributions
• Does not account for vesting schedules
• Assumes constant investment returns
• Does not include catch-up contributions
• For educational purposes only

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