Comprehensive Guide
Learn more in our Personal Finance Guide.
How it works
roth vs traditional ira calculator takes your inputs and produces roth ira balance (after-tax), traditional ira balance (after-tax), roth advantage, tax rate breakeven. Compare Roth IRA vs Traditional IRA returns based on current tax rate, expected retirement tax rate, and investment growth. You provide 5 inputs: Annual Contribution (currency, in dollars) (default: 7000 dollars); Current Tax Rate % (percent, in percent) (default: 24 percent); Expected Retirement Tax Rate % (percent, in percent) (default: 22 percent); Annual Return % (percent, in percent) (default: 7 percent); Years to Retirement (number) (default: 25). The calculator returns 4 outputs: Roth IRA Balance (after-tax) (a secondary output); Traditional IRA Balance (after-tax) (a secondary output); Roth Advantage (a secondary output); Tax Rate Breakeven (the primary result). Personal finance decisions trade off today's comfort against tomorrow's security. The numbers behind that trade-off — how much to save, spend, borrow, or insure — are what this calculator makes concrete. Rather than rules of thumb, it gives you the actual arithmetic for your situation so you can compare options side by side and decide with confidence. With the default values, tax rate breakeven is computed from the interaction of every input field — change any one of them and the result updates immediately, so you can stress-test different scenarios without re-entering the whole form. Adjust the inputs to match your real financial situation. The defaults are realistic starting points, but every person's circumstances differ — your actual income, expenses, rates, and timelines will produce a different answer. Use the tool iteratively: start with the defaults, then change one variable at a time to see which factor has the largest impact on your outcome.Tips
- Start with the default values to see a baseline result, then change one input at a time to understand which factor matters most for your outcome.
- Replace every default with your actual number — estimates and rules of thumb produce estimates, not answers. Pull your real figures from pay stubs, statements, or account dashboards.
- Run the calculation for both an optimistic and pessimistic scenario — the range between them is the realistic band you should plan around, not the single point estimate.
Frequently asked questions
When is Roth better than Traditional?
Roth is better when your retirement tax rate will be higher than your current rate. If you expect lower income in retirement, Traditional wins.
What does the roth vs traditional ira calculator calculate?
It takes annual contribution, current tax rate %, expected retirement tax rate %, annual return %, years to retirement as inputs and computes roth ira balance (after-tax), traditional ira balance (after-tax), roth advantage, tax rate breakeven. The primary output is tax rate breakeven. Compare Roth IRA vs Traditional IRA returns based on current tax rate, expected retirement tax rate, and investment growth.
How accurate are the calculator results?
The math is exact — the same formulas a financial professional would use by hand. The precision of the output depends entirely on how realistic your inputs are. Use your actual numbers rather than estimates when possible. The defaults are reasonable starting points, but your real income, rates, and timeline will produce a different result.