457 Plan: Roth vs. Pre-tax Calculator
Use this calculator to help determine whether a Roth or Pre-tax 457 might be best for you.
How the 457 plan: roth vs. pre-tax calculator works
It projects equal contributions to a Roth and a pre-tax 457, keeps the Roth tax-free, and taxes the pre-tax balance at your expected retirement rate, then compares the after-tax results.
Worked example: with annual 457 contribution of $10,000, years until retirement of 30 and annual return of 7.00%, the 457 plan roth vs pre-tax calculator shows better after-tax outcome of Roth 457.
- Roth 457 (tax-free)
- $1,010,730
- Pre-tax balance
- $1,010,730
- Pre-tax after tax
- $788,370
- Difference
- $222,361
The formula
Both grow as (balance + contribution) × (1 + return). Roth after-tax = balance. Pre-tax after-tax = balance × (1 − retirement tax rate).
Results are estimates for educational purposes and are not financial advice. Confirm exact figures with your lender, plan administrator or advisor.
Questions about the 457 plan: roth vs. pre-tax calculator
Does a 457 offer a Roth option?
Many governmental 457(b) plans now offer Roth contributions alongside pre-tax. The choice comes down to whether you expect higher or lower taxes in retirement.
When is Roth better in a 457?
When your tax rate in retirement is likely the same or higher than today, since you lock in today’s rate and withdraw tax-free later.
Is the 457 early-withdrawal rule different?
Yes — governmental 457 plans generally avoid the 10% early-withdrawal penalty after you leave the employer, a notable advantage over 401(k)s and 403(b)s.
Is the 457 Plan: Roth vs. Pre-tax Calculator free to use?
Yes. Every calculator on FinCalculators is completely free, with no sign-up, login or paywall. You can run as many scenarios as you like.