Roth vs Traditional 401(k) on $100k income? (married)
Elena & Tyler, 35 and 33, in Denver, CO
exampleMarried, no kids yet · $100k/yr household income
They're maxing their 401(k) in Denver and unsure whether Roth or traditional is quietly costing them.
35, married, $100k/yr. Roth or traditional 401(k)? "Always Roth" isn't always right at this income. Here's the lifetime-tax difference, modeled year by year.
The setup
Age
35
Household income
$100,000/yr
Household
Married, dual income
Liquid savings
$44,000
Retirement savings
$132,000
Investing return
7%/yr
Lean Roth, your 19% rate now is close to your ~6% retirement rate
19% → 6%
Similar rates, Roth locks in 19%
Rate Now
19%
Rate Retired
6%
Best Strategy
Roth 70%
NW Diff
+$73k
Your current effective rate (~19%) is close to your projected retirement rate (~6%). Roth wins because you lock in the lower rate now, and qualified growth + withdrawals are tax-free in retirement.
| Scenario | Strategy | Retire NW | Lifetime Taxes | Retire SWR/mo | Coverage |
|---|---|---|---|---|---|
| All Trad | 100% Traditional | $632,112 ($260k in today's dollars) | $1.0M | $2,107 | 7 yrs |
| Current | Current mix | $643,992 ($265k in today's dollars) | $854k | $2,147 | 8 yrs |
| 50/50 | 50/50 Split | $634,216 ($261k in today's dollars) | $861k | $2,114 | 8 yrs |
| Roth 70% | Tilt Roth (70%) | $717,383 ($296k in today's dollars) | $824k | $2,391 | 9 yrs |
| All Roth | 100% Roth | $764,135 ($315k in today's dollars) | $806k | $2,547 | 9 yrs |
Tax laws change. Roth conversions, RMDs, and state tax changes can shift the calculus. This analysis uses current rates as a starting point.
Your real number depends on your savings, debts, and city. The averages above are a starting point. Model your exact situation and get your verdict.
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Roth or traditional 401(k) for a married household earning $100k?
Lean Roth, your 19% rate now is close to your ~6% retirement rate
Similar rates, Roth locks in 19%
19% → 6%, modeled with Rightmont's projection engine for this exact scenario.
How was this calculated?
Rightmont runs your numbers through a year-by-year projection engine (taxes, compounding, Social Security, and your real cashflow) to model the outcome. Model your own version free in under a minute.
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For educational purposes only, not financial advice.