Roth vs Traditional 401(k) at 30 on $150k income? (married)
Marcus & Leah, 30 and 32, in Austin, TX
exampleMarried, no kids yet · $150k/yr household income
They're maxing their 401(k) in Austin and unsure whether Roth or traditional is quietly costing them.
30, married, $150k/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
$150,000/yr
Household
Married, dual income
Liquid savings
$36,000
Retirement savings
$108,000
Investing return
7%/yr
Lean Traditional, your 20% rate drops to ~18% in retirement
20% → 18%
Rate drops 2% in retirement
Rate Now
20%
Rate Retired
18%
Best Strategy
All Trad
NW Diff
+$638k
Your current effective rate of ~20% (engine-computed) drops to ~18% in retirement. Traditional saves taxes now when your rate is highest. The All Trad strategy produces +$638k more at retirement.
| Scenario | Strategy | Retire NW | Lifetime Taxes | Retire SWR/mo | Coverage |
|---|---|---|---|---|---|
| All Trad | 100% Traditional | $14,824,855 ($5.3M in today's dollars) | $6.9M | $49,416 | 25 yrs |
| Current | Current mix | $14,186,717 ($5.0M in today's dollars) | $5.6M | $47,289 | 25 yrs |
| 50/50 | 50/50 Split | $14,374,824 ($5.1M in today's dollars) | $5.5M | $47,916 | 25 yrs |
| Roth 70% | Tilt Roth (70%) | $14,087,413 ($5.0M in today's dollars) | $4.8M | $46,958 | 25 yrs |
| All Roth | 100% Roth | $13,818,808 ($4.9M in today's dollars) | $4.2M | $46,063 | 25 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 $150k at 30?
Lean Traditional, your 20% rate drops to ~18% in retirement
Rate drops 2% in retirement
20% → 18%, 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.