Roth vs Traditional 401(k) at 45 on $300k income? (married)
Aisha & Leah, 45 and 45, in Los Angeles, CA
exampleMarried, no kids yet · $300k/yr household income
They're maxing their 401(k) in Los Angeles and unsure whether Roth or traditional is quietly costing them.
45, married, $300k/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
45
Household income
$300,000/yr
Household
Married, dual income
Liquid savings
$252,000
Retirement savings
$756,000
Investing return
7%/yr
Lean Traditional, your 26% rate drops to ~2% in retirement
26% → 2%
Rate drops 24% in retirement
Rate Now
26%
Rate Retired
2%
Best Strategy
Current
NW Diff
$0
Your current effective rate of ~26% (engine-computed) drops to ~2% in retirement. Traditional saves taxes now when your rate is highest. The Current strategy produces $0 more at retirement.
| Scenario | Strategy | Retire NW | Lifetime Taxes | Retire SWR/mo | Coverage |
|---|---|---|---|---|---|
| All Trad | 100% Traditional | $6,581,575 ($3.6M in today's dollars) | $4.4M | $21,939 | 25 yrs |
| Current | Current mix | $6,471,857 ($3.6M in today's dollars) | $4.2M | $21,573 | 25 yrs |
| 50/50 | 50/50 Split | $6,303,604 ($3.5M in today's dollars) | $3.9M | $21,012 | 25 yrs |
| Roth 70% | Tilt Roth (70%) | $6,171,079 ($3.4M in today's dollars) | $3.7M | $20,570 | 25 yrs |
| All Roth | 100% Roth | $6,057,598 ($3.4M in today's dollars) | $3.8M | $20,192 | 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 $300k at 45?
Lean Traditional, your 26% rate drops to ~2% in retirement
Rate drops 24% in retirement
26% → 2%, 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.