The Moment
You just started a new job that offers a 401(k), or you are finally getting around to enrolling. The paperwork is confusing, the investment options are overwhelming, and you are tempted to deal with it later.
Do not deal with it later. Every month of delay costs you compound growth that you can never recover. Setting up your 401(k) today — even imperfectly — is worth more than setting it up perfectly six months from now.
The 15-Minute Setup
Step 1 — Find your employer match (2 minutes) Ask HR or check your benefits portal. The most common match is 50% on the first 6% of salary (meaning your employer adds $0.50 for every $1.00 you contribute, up to 6% of your salary). If you earn $60,000 and contribute 6% ($3,600), your employer adds $1,800. That is an instant 50% return on your money.
Step 2 — Set your contribution rate (3 minutes) At minimum: contribute enough to capture the full match. If the match is on 6%, contribute at least 6%. Ideally: contribute 10-15% of your salary. If you cannot afford 15% now, start at 6% (to capture the match) and auto-increase by 1% per year.
Step 3 — Choose your investments (5 minutes) If your plan offers a target-date fund (named "Target 2055" or "Retirement 2060"), choose the one closest to your expected retirement year. Target-date funds automatically diversify across stocks and bonds and become more conservative as you age. They are the single best default for someone who does not want to manage investments.
If no target-date fund is available, look for a low-cost S&P 500 index fund or total market index fund.
Step 4 — Turn on auto-increase (2 minutes) Most 401(k) plans allow you to set automatic annual contribution increases (usually 1% per year up to a cap). Turn this on. You will never notice 1% — but over 10 years, it doubles your contribution rate without any additional decisions.
Run Your Numbers
Enter your salary and contribution rate to see projected growth.
Retirement Savings Projector
Traditional vs Roth 401(k)
Many plans now offer both. The difference:
Traditional 401(k): Contributions reduce your taxable income now. You pay taxes when you withdraw in retirement.
Roth 401(k): Contributions are after-tax (no tax break now). Withdrawals in retirement are tax-free.
Simple rule: If you are early in your career and expect higher income later, choose Roth — you are locking in a lower tax rate. If you are in a high tax bracket now and expect to be lower in retirement, choose Traditional.
If you are unsure, split 50/50. You benefit from tax diversification in retirement.
What to explore next
- →Should I choose Roth or Traditional 401(k)?
- →What investments should I pick in my 401(k)?
- →How much should I have in my 401(k) by age 30?
Frequently Asked Questions
What if I cannot afford to contribute 6%?
Start with whatever you can — even 1-2%. The employer match may only apply above a threshold, but getting into the habit of contributing matters more than the initial percentage. Use auto-increase to ramp up 1% per year.
Can I lose money in a 401(k)?
In the short term, yes — stock markets fluctuate. But over 20-30 years, a diversified portfolio has historically always grown. The risk of not investing (missing decades of compound growth) far exceeds the risk of short-term market declines.