Roth vs Traditional 401(k) at 30 on $100k income? (married)
Aisha & Jordan, 30 and 30, in Minneapolis, MN
exampleMarried, no kids yet · $100k/yr household income
They're maxing their 401(k) in Minneapolis and unsure whether Roth or traditional is quietly costing them.
30, 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
30
Household income
$100,000/yr
Household
Married, dual income
Liquid savings
$24,000
Retirement savings
$72,000
Investing return
7%/yr
Roth 70% preserves the most, but your plan runs short in retirement, so close that gap first
+$99k
Roth 70% preserves the most, fix the shortfall first
Rate Now
19%
Rate Retired
—
Best Strategy
Roth 70%
NW Diff
+$99k
Your plan's investable assets are exhausted by retirement, so a retirement tax rate can't be projected, the Roth-vs-Traditional choice is secondary to the funding gap. Among these options, Roth 70% produces +$99k more, but the priority is closing the shortfall (save more or retire later) before optimizing tax allocation.
| Scenario | Strategy | Retire NW | Lifetime Taxes | Retire SWR/mo | Coverage |
|---|---|---|---|---|---|
| All Trad | 100% Traditional | $223,982 shortfall | $1.1M | $0 | 0 yrs |
| Current | Current mix | $52,204 shortfall | $1.1M | $0 | 0 yrs |
| 50/50 | 50/50 Split | $80,651 shortfall | $1.2M | $0 | 0 yrs |
| Roth 70% | Tilt Roth (70%) | $46,803 ($17k in today's dollars) | $1.1M | $156 | 1 yrs |
| All Roth | 100% Roth | $127,143 ($45k in today's dollars) | $1.1M | $424 | 1 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 at 30?
Roth 70% preserves the most, but your plan runs short in retirement, so close that gap first
Roth 70% preserves the most, fix the shortfall first
+$99k, 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.