Decision Summary
Roth minus Traditional (after-tax value)
-$26,564.60
Negative value favors Traditional IRA.
Retirement
Roth vs Traditional IRA Calculator
Compare after-tax retirement outcomes between Roth and Traditional IRA contributions under different tax-rate assumptions.
Scenario Comparison
The main answer and the most important supporting outputs in one glance.
Roth minus Traditional (after-tax value)
-$26,564.60
Roth future value
$336,484.88
Traditional (after-tax)
$363,049.48
Current tax rate
24.00%
Key Metrics
Roth future value
$336,484.88
Traditional (after-tax)
$363,049.48
Current tax rate
24.00%
Retirement tax rate
18.00%
How to use it
- Enter annual contribution budget, current tax rate, retirement tax rate, years, and expected return using marginal tax rates. The decision is about the tax rate on the contributed dollar today versus the withdrawn dollar later.
- Read Roth future value, Traditional after-tax value, and the after-tax difference. If the same dollar amount is contributed to both, Roth often carries extra tax shelter because the tax is paid outside the account.
- If your current marginal rate is lower than the rate you expect in retirement, Roth usually has the edge; if it is higher today, Traditional often wins. When future tax rates are uncertain, splitting contributions is a rational hedge.
- Capture any 401(k) match first, then use this result to direct IRA contributions while checking income eligibility and deduction rules separately. Follow up with the retirement calculator to see the portfolio-level effect.
- Re-run when your bracket changes, retirement-income expectations shift, or tax laws move. Track the tax-rate spread that would flip the recommendation.
AI Integrations
Contract, discovery endpoints, and developer notes for agent use.
Always available for agents
AI Integrations
Contract, discovery endpoints, and developer notes for agent use.
Tool contract JSON
https://aifinhub.io/contracts/roth-vs-traditional-ira-calculator.jsonStable input and output contract for this exact tool.
Human review
People can use the browser page to sense-check outputs and charts, but agents should still execute against the contract and discovery endpoints.
- /agent-tools.json - machine-readable tool index.
- /llms.txt - human-readable model discovery guide.
- /.well-known/webmcp.json - WebMCP capabilities manifest.
- /.well-known/ai-plugin.json - plugin-style discovery manifest.
{
"tool": "roth_vs_traditional_ira",
"annual_contribution_budget": 7000,
"current_tax_rate_percent": 24,
"retirement_tax_rate_percent": 18,
"years": 25,
"annual_return_percent": 7
} Expand developer notes
Agent playbook
- Resolve Roth vs Traditional IRA Calculator from /agent-tools.json and open its contract before execution.
- Validate inputs against the contract schema instead of scraping labels from the page UI.
- Open the browser page only when a person wants to review charts, assumptions, or related tools.
Agent FAQ
Should ChatGPT, Claude, or another agent click through the UI?
No. Start with /agent-tools.json, then follow the tool's contract URL. The page UI is for human review, not parameter discovery.
When do tools show Quick and Advanced?
Every tool opens in Quick Start first. Advanced Controls keeps the same scenario, reveals more assumptions or diagnostics, and every tool keeps AI integrations inline below the instructions.
When should an agent still open the browser page?
Open it when a human wants to sense-check the output, review the chart, or keep exploring related tools after the calculation finishes.
Questions people usually ask
When does Roth usually win?
Roth usually looks better when you expect to face a higher tax rate in retirement or you value tax-free withdrawals later.
When does Traditional usually win?
Traditional IRA contributions often look better when your current tax rate is higher than the rate you expect to pay in retirement.
Why is the future tax-rate assumption such a big deal?
Because the whole decision is about whether paying tax now or later leaves you with more spendable money in retirement.
Should I trust tiny differences?
Not really. If the gap is small, account eligibility, cash-flow needs, and tax flexibility may matter more than the calculator winner.
Is this professional advice?
No. Outputs are planning estimates only — not financial, tax, or investment advice.
Related Resources
Learn the decision before you act
Every link here is tied directly to Roth vs Traditional IRA Calculator. Use the explanation, formula, examples, and benchmarks to pressure-test the calculator output from first principles.
How To Use
6 STEPSHow to Use FIRE Calculator
Uncover your path to Financial Independence, Retire Early (FIRE) with our intuitive calculator. Estimate your FIRE number and years to freedom.
ReadHow To Use
6 STEPSHow to Use Retirement Savings Calculator
reveal your retirement future! Learn how to use our Retirement Savings Calculator to project your nest egg, identify savings gaps, and create a realistic plan for financial independence. Discover if you're on track.
ReadHow To Use
5 STEPSHow to Use Roth vs Traditional IRA Calculator
Optimize your retirement savings! Learn to use the Roth vs Traditional IRA calculator to compare long-term tax benefits and make an informed decision for your financial future.
ReadGuide
6 MIN READHow to Start a Roth IRA
reveal tax-free growth for retirement. Discover the exact steps to open a Roth IRA, understand contribution limits, choose investments, and maximize your savings.
ReadComparison
6 CRITERIAIRA vs 401(k): Key Differences
Navigate the complexities of retirement savings. This guide details the key differences between IRAs and 401(k)s, helping you choose the best plan to maximize tax advantages.
ReadComparison
6 CRITERIARoth IRA vs Traditional IRA: Which Is Right for You?
Decide between Roth and Traditional IRAs. Compare their unique tax benefits, contribution rules, and withdrawal flexibility to choose the best retirement savings strategy for your financial future.
ReadContinue With Related Tools
FIRE Calculator
See how long financial independence could take, how much you need, and how sensitive the plan is to savings and return assumptions.
Retirement Savings Calculator
Project retirement readiness with inflation-aware targets, coast-FIRE checkpoints, and contribution-gap analysis.
401(k) Employer Match Optimizer
See how much employer match you already capture, how much you leave on the table, and what that gap could grow into.
Social Security Break-Even Age Calculator
Find when delaying Social Security benefits pays off vs claiming early. Compare cumulative lifetime benefits for claiming at 62, 67, or 70 with COLA adjustments.