Are investment returns guaranteed in these tools?
No. Return inputs are modeling assumptions, not forecasts. Change them to see how sensitive a long-term result is to the assumption.
Retirement & investing tools
Retirement calculators for contributions, employer match, taxes and long-term goals.
Retirement planning is a chain of smaller questions: contribution room, employer match, current tax treatment, compounding and the income you may eventually need. MFA keeps those assumptions editable instead of presenting one magic retirement number.
Run the numbers
401(k) Contribution Calculator
Project a 401(k) balance using salary, employee contributions, employer-match assumptions, investment return, and time horizon.
Run calculator401(k) Match Calculator
Estimate the employer contribution under the match formula you enter and see whether the modeled match is fully captured.
Run calculator401(k) Tax Savings Calculator
Estimate how a Traditional 401(k) contribution could reduce current taxable income and modeled federal and state income taxes.
Run calculatorRoth vs Traditional IRA Calculator
Compare modeled Roth and Traditional outcomes using your contribution basis, current tax rate, retirement tax rate, return assumption, and time horizon.
Run calculatorRetirement Goal Calculator
Compare a projected retirement balance with your target and estimate the monthly contribution needed under the assumptions you enter.
Run calculatorCompound Interest Calculator
Model how a starting balance and regular contributions could change over time under an editable annual return assumption.
Run calculator Questions these tools answer
Am I capturing the employer match formula I entered?
How could a Traditional 401(k) contribution change modeled current income taxes?
How do Roth and Traditional outcomes change when current and retirement tax-rate assumptions change?
What monthly contribution closes the modeled gap to a retirement target?
A better sequence
Use the tools as one decision, not six isolated calculators.
- 1
Start with your employer match because a plan formula can affect the value of the next contribution dollar.
- 2
Check annual contribution limits and current-paycheck tax effects separately from long-term growth.
- 3
Use the retirement-goal and compound-interest tools last, with return and inflation assumptions you can explain and stress-test.
FAQ
What to know before relying on the output.
Does Roth versus Traditional have one universal winner?
No. The comparison depends heavily on current tax cost, future tax treatment, contribution basis, withdrawal assumptions and rules that can change.
Where do the annual retirement limits come from?
MFA versions federal annual limits from official IRS releases and labels the active rules year. See Data & Methodology for source and freshness details.
Keep going
MFA tools are educational estimates, not financial, investment, tax, legal, insurance, lending or underwriting advice. Inputs, rules, rates and personal circumstances can change the result. Review the source and methodology notes on the relevant tool.