Roth vs Traditional 401(k) on $150k income? (single)
At $150,000 a year, the Roth vs. traditional debate feels like a coin flip — but for you, the math lands decisively on one side.
The setup
Age
35
Household income
$150,000/yr
Household
Single earner
Liquid savings
$66,000
Retirement savings
$198,000
Investing return
7%/yr
Lean Traditional — your 24% rate drops to ~11% in retirement
24% → 11%
Rate drops 13% in retirement
Rate Now
24%
Rate Retired
11%
Best Strategy
Current
NW Diff
$0
You're paying 24% on every dollar you contribute today, but the engine projects your retirement rate drops to roughly 11% — a 13-percentage-point gap that means deferring taxes now is the higher-value move. With $198,000 already in retirement savings at 35, you have decades of compounding to let that spread work in your favor. The net worth difference between the two strategies is $0 if you invest the tax savings, which means Traditional wins only if you actually redeploy what you keep today.
Your current effective rate of ~24% (engine-computed) drops to ~11% 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 | $11,756,505 ($4.8M in today's dollars) | $6.2M | $39,188 | 25 yrs |
| Current | Current mix | $11,536,394 ($4.8M in today's dollars) | $5.6M | $38,455 | 25 yrs |
| 50/50 | 50/50 Split | $11,252,480 ($4.6M in today's dollars) | $4.9M | $37,508 | 25 yrs |
| Roth 70% | Tilt Roth (70%) | $10,984,825 ($4.5M in today's dollars) | $4.3M | $36,616 | 25 yrs |
| All Roth | 100% Roth | $10,719,241 ($4.4M in today's dollars) | $3.8M | $35,731 | 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.
Plug in your own income and savings mix to see exactly where your personal rate crossover lives — because that gap is the only number that matters.
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Get my verdict →Frequently asked
Roth or traditional 401(k) for a single household earning $150k?
Lean Traditional — your 24% rate drops to ~11% in retirement
Rate drops 13% in retirement
24% → 11% — 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.