Roth vs Traditional 401(k) at 45 on $300k income? (single)
Priya, 45, in Los Angeles, CA
exampleSingle, no kids · $300k/yr household income
They're maxing their 401(k) in Los Angeles and unsure whether Roth or traditional is quietly costing them.
45, single, $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
Single earner
Liquid savings
$252,000
Retirement savings
$756,000
Investing return
7%/yr
Lean Traditional, your 30% rate drops to ~13% in retirement
30% → 13%
Rate drops 17% in retirement
Rate Now
30%
Rate Retired
13%
Best Strategy
All Trad
NW Diff
+$158k
Your current effective rate of ~30% (engine-computed) drops to ~13% in retirement. Traditional saves taxes now when your rate is highest. The All Trad strategy produces +$158k more at retirement.
| Scenario | Strategy | Retire NW | Lifetime Taxes | Retire SWR/mo | Coverage |
|---|---|---|---|---|---|
| All Trad | 100% Traditional | $12,060,446 ($6.7M in today's dollars) | $6.3M | $40,201 | 25 yrs |
| Current | Current mix | $11,902,543 ($6.6M in today's dollars) | $6.2M | $39,675 | 25 yrs |
| 50/50 | 50/50 Split | $11,738,896 ($6.5M in today's dollars) | $5.8M | $39,130 | 25 yrs |
| Roth 70% | Tilt Roth (70%) | $11,571,335 ($6.4M in today's dollars) | $5.5M | $38,571 | 25 yrs |
| All Roth | 100% Roth | $11,416,872 ($6.3M in today's dollars) | $5.3M | $38,056 | 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 single household earning $300k at 45?
Lean Traditional, your 30% rate drops to ~13% in retirement
Rate drops 17% in retirement
30% → 13%, 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.