Roth vs Traditional 401(k) on $150k income? (single)
Marcus, 35, in Austin, TX
exampleSingle, no kids · $150k/yr household income
They're maxing their 401(k) in Austin and unsure whether Roth or traditional is quietly costing them.
Marcus is maxing his 401(k) in Austin and probably doing it wrong. At $150k today, the question isn't Roth vs. traditional in the abstract. It's whether paying 24% tax now beats paying 7% in retirement, and the math has a clear winner.
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 ~7% in retirement
24% → 7%
Rate drops 17% in retirement
Rate Now
24%
Rate Retired
7%
Best Strategy
Current
NW Diff
$0
Every dollar Marcus puts into a traditional 401(k) today gets a 24% discount at the IRS's expense. The engine projects his effective retirement rate at roughly 7%, a 17-point spread. Paying taxes upfront through a Roth when that gap exists doesn't feel like flexibility, it just costs more.
Your current effective rate of ~24% (engine-computed) drops to ~7% 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 | $12,305,036 ($5.1M in today's dollars) | $5.9M | $41,017 | 25 yrs |
| Current | Current mix | $12,056,213 ($5.0M in today's dollars) | $5.4M | $40,187 | 25 yrs |
| 50/50 | 50/50 Split | $11,733,779 ($4.8M in today's dollars) | $4.8M | $39,113 | 25 yrs |
| Roth 70% | Tilt Roth (70%) | $11,432,345 ($4.7M in today's dollars) | $4.2M | $38,108 | 25 yrs |
| All Roth | 100% Roth | $11,139,008 ($4.6M in today's dollars) | $3.7M | $37,130 | 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.
Run your own numbers in the model and see exactly how much that rate spread is worth at your actual income and retirement spending target.
Model your own version, free
Your real answer depends on your full picture. Build it in under a minute.
Get my verdict →Frequently asked
Roth or traditional 401(k) for a single household earning $150k?
Lean Traditional, your 24% rate drops to ~7% in retirement
Rate drops 17% in retirement
24% → 7%, 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.
Related scenarios
Related guides
For educational purposes only, not financial advice.