The 2025 401(k) limit is $23,500 ($31,000 if age 50+). Most Americans contribute 6–10% of salary and stop. Here's why maxing out — or getting as close as possible — dramatically changes your retirement outcome.
The Impact of Maximizing vs Just Getting the Match
Say you earn $80,000 and get a 50% match on up to 6% of salary. Match strategy: contribute $4,800/year, get $2,400 free → $7,200/year total. Max strategy: contribute $23,500/year, get $2,400 free → $25,900/year total. Over 30 years at 7%: Match only = $723,000. Maxed out = $2,599,000. The difference is $1.87 million.
Traditional vs Roth 401(k): Which to Choose
- •Traditional 401(k): Pre-tax contributions lower your taxable income now; withdrawals taxed in retirement
- •Roth 401(k): After-tax contributions now; tax-free withdrawals in retirement (no RMDs after 2024)
- •If under 32 or in the 12–22% bracket: Roth 401(k) likely wins
- •If in 32%+ bracket now and expect lower income in retirement: Traditional likely wins
- •If unsure: Split 50/50 for tax diversification
Choosing the Right Funds Inside Your 401(k)
- •Find the lowest expense ratio funds — usually an S&P 500 index fund or total market index
- •Avoid high-fee actively managed funds — they rarely outperform the index net of fees
- •Check if your plan has a brokerage window (self-directed option) for access to ETFs
- •A simple allocation: 70–90% US stocks + 10–20% international + 0–20% bonds depending on age
If you can't afford to max out immediately, use the "1% per raise" strategy: every time you get a raise, increase your 401(k) contribution by 1%. You never feel the reduction because the extra contribution comes from money you didn't have before.
Even half-way to the max beats stopping at the match. If $23,500 is too much, aim for $15,000 or $12,000. The tax deduction alone makes every dollar contributed worth more than a dollar of after-tax spending.