Roth vs Traditional 401(k), Fees & Early Withdrawal Rules
Three decisions can quietly make or break your 401(k): choosing the right account type, minimizing fees, and understanding the steep cost of early withdrawals.
Should I Choose Roth or Traditional 401(k)?
The core difference is when you pay taxes. Traditional reduces your taxable income today; Roth lets your money grow and be withdrawn tax-free in retirement.
Traditional 401(k)
Tax-deferred growth
Contributions are pre-tax (lower taxable income now)
Reduces your current-year tax bill
Better if you expect a lower tax rate in retirement
All withdrawals taxed as ordinary income
Required minimum distributions (RMDs) at 73
Roth 401(k)
Tax-free growth
Qualified withdrawals are completely tax-free
Tax-free growth over decades
No RMDs during your lifetime (starting 2024)
Better if you expect a higher tax rate in retirement
Contributions are after-tax (no current tax break)
Which wins? A tax rate comparison
Assumes $10,000/yr contribution, 7% return, 30 years, 25% tax bracket today.
| Tax Rate in Retirement | Traditional (after-tax) | Roth (tax-free) | Winner |
|---|---|---|---|
| 15% | $802,917 | $708,456 | Traditional |
| 20% | $755,686 | $708,456 | Traditional |
| 22% | $736,794 | $708,456 | Traditional |
| 25% | $708,456 | $708,456 | Traditional |
| 28% | $680,118 | $708,456 | Roth |
| 32% | $642,333 | $708,456 | Roth |
Rule of thumb: Choose Roth if you expect to be in a higher tax bracket in retirement, or if you're young and in a low bracket now. Choose Traditional if you're in a high bracket today and expect lower income in retirement.
How Do Fees Affect My 401(k) Growth?
Expense ratios — the annual fee charged by mutual funds — seem small but compound against you just like returns compound for you. A 1% expense ratio on a $500,000 portfolio costs $5,000/yr before compounding.
| Expense Ratio | Balance at 67 | Cost vs 0.05% |
|---|---|---|
| 0.05% | $1,302,490 | — |
| 0.20% | $1,258,535 | -$43,955 |
| 0.50% | $1,175,377 | -$127,113 |
| 1.00% | $1,049,788 | -$252,703 |
| 1.50% | $938,783 | -$363,707 |
Assumes $50K starting balance, $8,000/yr contributions, 32 years. The "cost vs 0.05%" shows how much you lose to fees over time compared to a low-cost index fund.
Action: Check your expense ratios now
Log into your 401(k) plan and look at the expense ratio of each fund you hold. Target funds with expense ratios below 0.20%. Index funds (S&P 500, total market) at major brokerages are often 0.02–0.05%.
Can I Withdraw from My 401(k) Early?
Yes, but withdrawing before age 59½ triggers a 10% early withdrawal penalty on top of ordinary income taxes. On a $50,000 withdrawal in the 22% bracket, you'd lose nearly $16,000 to taxes and penalties.
| Withdrawal Amount | 10% Penalty | 22% Tax | You Keep |
|---|---|---|---|
| $10,000 | -$1,000 | -$2,200 | $6,800 |
| $25,000 | -$2,500 | -$5,500 | $17,000 |
| $50,000 | -$5,000 | -$11,000 | $34,000 |
| $100,000 | -$10,000 | -$22,000 | $68,000 |
Hardship withdrawal exceptions (no 10% penalty):
Separation from service at age 55+
Substantially equal periodic payments (SEPP / Rule 72(t))
Total & permanent disability
Medical expenses exceeding 7.5% of AGI
Death (distributions to beneficiaries)
Qualified domestic relations order (QDRO)
Consider a 401(k) loan instead
Most plans let you borrow up to 50% of your vested balance (max $50,000). You pay yourself back with interest. No taxes or penalty — but you lose compounding on the borrowed amount while it's out, and the loan must be repaid if you leave your job.
Calculate Your 401(k) Balance
401(k) Calculator
Key Takeaways
Choose Roth if you expect higher taxes in retirement; Traditional if you're in a high bracket now.
A 1% expense ratio can cost over $100,000 over 30 years — always choose low-cost index funds when available.
Early withdrawals (before 59½) cost 10% penalty + ordinary income tax — often 30–35% total.
401(k) loans avoid penalties but halt compounding on the borrowed amount.
After age 59½, Traditional 401(k) withdrawals are taxed as ordinary income but no penalty applies.