On this page
- How Traditional IRA Works
- Tax-Deferred vs. Tax-Free
- 2024 Contribution Limits
- Traditional vs. Roth IRA
- When Traditional IRA is Better
- When Roth is Better
- Required Minimum Distributions (RMDs)
- Roth Conversion Strategy
- Penalty and Exceptions
- Deductibility Rules
- Backdoor Roth (High-Earner Workaround)
- Tax-Deferred Growth Advantage
- The Bottom Line
How Traditional IRA Works
Step 1: Contribute pre-tax dollars
- You earn $50,000
- Contribute $7,000 to Traditional IRA (deductible)
- Taxable income: $43,000
- Taxes: $4,300 (instead of $5,500 without deduction)
- Tax savings: $1,200 immediately
Step 2: Invest and grow tax-deferred
- $7,000 grows to $70,000 over 30 years
- No taxes owed during growth
- $63,000 in gains, untaxed
Step 3: Withdraw and pay taxes
- At 65+: Withdraw $70,000
- Pay ordinary income taxes on entire withdrawal
- If you're in 22% bracket: Pay $15,400 in taxes
- Net: $54,600
Tax-Deferred vs. Tax-Free
Traditional IRA is tax-deferred (not tax-free):
Tax-deferred: Taxes are delayed until withdrawal
- Pay less in taxes today
- Pay more in taxes later
- Net result: Same total taxes (if rates unchanged)
Tax-free: No taxes ever
- Roth IRA is tax-free
- Much better than Traditional
2024 Contribution Limits
Contribution limit: $7,000/year ($8,000 age 50+)
Deduction phase-out (if you have a 401(k)):
- Single: $77,000-$87,000
- Married filing jointly: $123,000-$143,000
If you exceed these limits and have a 401(k), your contribution is not deductible. This is why backdoor Roth is valuable.
Traditional vs. Roth IRA
| Feature | Traditional | Roth |
|---|---|---|
| Contribution | Pre-tax (deductible) | After-tax (not deductible) |
| Growth | Tax-deferred | Tax-free |
| Withdrawals | Taxed as income | Tax-free |
| Required distributions | Yes, age 73+ | No |
| Best for | Expecting lower future tax rate | Expecting higher future tax rate |
When Traditional IRA is Better
You expect lower tax rates in retirement:
- Earning $100,000 today (24% bracket)
- Will have $30,000 income in retirement (12% bracket)
- Deduction saves 24% now; pay 12% later
- Net savings: 12%
You need the immediate tax deduction:
- High-income year where extra deduction is valuable
- Reduce current taxes more than you'll owe later
When Roth is Better
You expect higher tax rates in retirement:
- Earning $50,000 today (12% bracket)
- Will have $80,000 income in retirement (22% bracket)
- Roth costs nothing now; withdrawals are tax-free
- Traditional would require paying 22% taxes in retirement
You want maximum growth:
- Young person with 40+ year horizon
- Roth's tax-free growth compounds to much higher value
Required Minimum Distributions (RMDs)
Traditional IRAs require withdrawals starting age 73:
Example: $500,000 Traditional IRA at age 73
- RMD: $500,000 ÷ 26.5 (life expectancy factor) = $18,868
- Must withdraw at least $18,868 or pay 25% penalty
Problem: You might not need the money; you're forced to withdraw and pay taxes.
Solution: Roth IRA has no RMDs (you can leave it to heirs).
Roth Conversion Strategy
Convert Traditional IRA to Roth when in low-tax years:
Example:
- You have $200,000 Traditional IRA
- You retire early, have $30,000 income
- You're in 12% tax bracket
Conversion:
- Convert $50,000 to Roth
- Pay 12% tax = $6,000
- $50,000 now grows tax-free forever
- You avoided paying 22-37% taxes later
Roth conversions are powerful in low-income retirement years.
Penalty and Exceptions
Early withdrawal penalty (before 59.5):
- 10% penalty + income taxes
- Exceptions: First-time home buyer ($10,000 lifetime), education, disability, medical expenses
RMD penalty (not withdrawing enough at 73+):
- 25% penalty on amount not withdrawn
- Reduced to 10% if corrected quickly
These penalties make Traditional IRAs less flexible than Roth for early access.
Deductibility Rules
If you or spouse has a 401(k):
- Income below phase-out: Full deduction
- Income in phase-out range: Partial deduction
- Income above phase-out: No deduction
Example: Single, 401(k) available, $85,000 income
- Phase-out range: $77,000-$87,000
- You're halfway through phase-out
- Can deduct ~$3,500 of $7,000 contribution
- Remaining $3,500 is non-deductible
This is frustrating and why backdoor Roth exists.
Backdoor Roth (High-Earner Workaround)
High-earners can bypass Roth income limits:
- Contribute $7,000 to non-deductible Traditional IRA
- Immediately convert to Roth
- Pay minimal taxes (only if gains occurred)
- Result: $7,000 in Roth despite income limits
The pro-rata rule complicates this if you have existing Traditional IRA balances, but the strategy works.
Tax-Deferred Growth Advantage
The power of tax-deferred growth:
Taxable account: $7,000 invested at 8% for 30 years
- Growth: $70,000
- Taxes on gains at 20%: $14,000
- After-tax value: $63,000
Traditional IRA: $7,000 invested at 8% for 30 years
Growth: $70,000
Withdraw at age 65 in 22% bracket: $15,400 taxes
After-tax value: $54,600
Tax-deferred still wins (assuming 22% bracket is better than capital gains + reinvestment taxes)
The Bottom Line
Traditional IRAs are valuable if you expect lower taxes in retirement. The immediate deduction saves taxes today; you pay taxes later when (hopefully) you're in a lower bracket.
For young people expecting rising incomes, Roth is usually better. For high-income workers nearing retirement with expected lower retirement income, Traditional can be superior.
The key decision: Will your tax rate be higher or lower in retirement?
