The Tax Picture at $100K Income
At $100,000 gross with the standard deduction your taxable income is roughly $85,000 — spanning the 22% bracket. A $7,000 Traditional IRA deduction saves $1,540 in federal taxes. In California or New York an additional 9-10% state deduction saves another $630-$700. Traditional starts looking more attractive when state taxes are high.
Traditional IRA tax savings at $100K income by state
| State Tax Rate | Traditional IRA $7K Tax Savings | Roth IRA Tax Cost | Traditional Advantage |
|---|---|---|---|
| 0% (TX FL WA) | $1,540 federal only | $1,540 | Equal — choose Roth for flexibility |
| 5% (CO VA) | $1,890 fed + state | $1,890 | Equal — slight Roth edge for RMD avoidance |
| 9.3% (California) | $2,191 fed + state | $2,191 | Equal — but CA exempts retirement income partially |
| 13.3% (California top) | $2,471 fed + state | $2,471 | Larger current savings — evaluate carefully |
Projecting Your Retirement Tax Bracket at $100K Savings Rate
If you save $7,000/year in IRAs and $15,000/year in 401k for 30 years at 7% annual return, you retire with approximately $2.3M in tax-deferred accounts. RMDs on $2.3M at age 73 are roughly $86,500/year — likely pushing you into the 22%-24% bracket even in retirement. This makes Roth IRA contributions at $100K income look very attractive.
Successful long-term retirement savers often discover their Traditional IRA and 401k have grown so large that RMDs force them into high tax brackets in retirement — sometimes higher than during their working years. Roth IRA contributions now eliminate this problem.
Projected RMDs and retirement tax rate by savings level
| Savings Scenario | Age 73 Account Balance | Annual RMD | Added to Social Security | Effective Retirement Tax Rate |
|---|---|---|---|---|
| Moderate saver $5K/yr at 6% | $395K | $14,850 | ~$32K SS | 12%–22% |
| Good saver $7K IRA + $10K 401k at 7% | $1.8M | $67,700 | ~$32K SS | 22%–24% |
| Aggressive saver $7K IRA + $23K 401k at 7% | $3.2M | $120,300 | ~$32K SS | 24%–32% |
The Hybrid Strategy at $100K
For a $100K earner the most common recommendation is tax diversification: max Roth IRA ($7,000/year) for tax-free retirement income plus enough Traditional 401k contributions to get the employer match plus additional tax-deferred savings. This creates flexibility in retirement to draw from either bucket based on your tax situation each year.
- Max Roth IRA $7,000/year — fully eligible at $100K single income
- Traditional 401k: at minimum enough for full employer match
- Consider Roth 401k for additional contributions to reduce RMD risk
- Tax diversification goal: target 50% Roth / 50% Traditional assets by retirement
Model Your $100K IRA Decision
See the 30-year after-tax value of Roth vs. Traditional with your income, bracket, and state tax.