Roth Vs Traditional Calculator

Background.

This roth vs traditional page is built to compare equal nominal contributions after compounding and one entered retirement tax rate. A Roth contribution is taxed before contribution and qualified withdrawals are generally tax-free; a traditional account may deduct contributions and taxes distributions. The implemented convention is “compare equal nominal end-of-year contributions compounded at one entered return; traditional future value is reduced by entered retirement tax.”

The editable entries are annual contribution under either account, expected annual return, accumulation years, current marginal income-tax rate, estimated retirement withdrawal tax rate. Use values from the document or measurement that governs this roth vs traditional question; the defaults are only the worked fixture below. Equal nominal deposits are not equal current cash cost when a deduction exists, so interpret this as an account-balance comparison. If that roth vs traditional condition is not true, choose a calculation that models the missing convention.

IRS Publication 590-A, Contributions to Individual Retirement Arrangements; IRA contribution and conversion basis rules documents the convention or governing rule used here. The roth vs traditional output is a transparent scenario under those facts: it does not manufacture an unentered market price, professional determination, carrier quote, legal eligibility finding or locally adopted code value.

What is roth vs traditional calculator?

Roth Vs Traditional is the relationship behind this decision: a Roth contribution is taxed before contribution and qualified withdrawals are generally tax-free; a traditional account may deduct contributions and taxes distributions. On this page it means compare equal nominal end-of-year contributions compounded at one entered return; traditional future value is reduced by entered retirement tax. Equal nominal deposits are not equal current cash cost when a deduction exists, so interpret this as an account-balance comparison; that is the line between the reported quantity and a broader tax analysis.

How to use this calculator.

1. 01Confirm that “compare equal nominal end-of-year contributions compounded at one entered return; traditional future value is reduced by entered retirement tax” matches the roth vs traditional convention you need.
2. 02Replace the fixture values for annual contribution under either account, expected annual return, accumulation years, current marginal income-tax rate, estimated retirement withdrawal tax rate with dated values from the governing record.
3. 03Keep all currencies, measurement units and time periods on the same basis before calculating.
4. 04Read roth future value after modeled taxes together with this boundary: Equal nominal deposits are not equal current cash cost when a deduction exists, so interpret this as an account-balance comparison.

The formula.

The calculation uses compare equal nominal end-of-year contributions compounded at one entered return; traditional future value is reduced by entered retirement tax. In this roth vs traditional model, the entered terms are annual contribution under either account, expected annual return, accumulation years, current marginal income-tax rate, estimated retirement withdrawal tax rate. A Roth contribution is taxed before contribution and qualified withdrawals are generally tax-free; a traditional account may deduct contributions and taxes distributions, which is why the relationship is presented under this name rather than as a universal alternative. Equal nominal deposits are not equal current cash cost when a deduction exists, so interpret this as an account-balance comparison. Calculations keep full decimal precision through the relationship and round only the returned display values.

A worked example.

Frequently asked questions.

References& sources.

1. [1]IRS Publication 590-A, Contributions to Individual Retirement Arrangements; IRA contribution and conversion basis rules. Retrieved 2026-08-07. access: open unless marked otherwise.
2. [2]U.S. Internal Revenue Service. About Form 8606, Nondeductible IRAs. Retrieved 2026-08-07. independence: primary; access: open.
3. [3]U.S. Internal Revenue Service. Publication 590-B, Distributions from Individual Retirement Arrangements. Retrieved 2026-08-07. independence: primary; access: open.
4. [4]U.S. Internal Revenue Service. Retirement topics — IRA contribution limits. Retrieved 2026-08-07. independence: primary; access: open.
5. [5]U.S. Internal Revenue Service. Instructions for Form 8606, Nondeductible IRAs. Retrieved 2026-08-07. independence: primary; access: open.