Direct answer: At 18-24, open accounts in this order: capture any 401(k) employer match, then open a Roth IRA (\,000 limit in 2026), then an HSA if you have an HSA-eligible health plan. A taxable brokerage account is useful once tax-advantaged space is full.
Investment Account Map: Which Accounts Matter Most at 18-24
Key Takeaways
- The account opening sequence at 18-24: capture 401(k) employer match first, then Roth IRA, then HSA if eligible, then taxable brokerage.
- A Roth IRA ($7,000 limit in 2026) is the highest-priority retirement account for most 18-24 year olds because low current tax rates make the Roth structure most valuable.
- An HSA offers a triple tax advantage: deductible contributions, tax-free growth, and tax-free qualified medical withdrawals. Eligibility requires an HSA-eligible high-deductible health plan.
- A taxable brokerage account has no contribution limits and no tax advantages, but provides flexibility. Use it after tax-advantaged space is filled.
- Account eligibility depends on employment status, health plan type, and income. Verify eligibility before contributing.
Step 1: Capture the 401(k) Employer Match
If your employer offers a 401(k) match, the first dollars you direct to retirement go here, up to the match threshold. A typical match might be 50% of contributions up to 6% of your salary. If you earn $45,000 and contribute 6% ($2,700 per year), your employer adds $1,350. That is an immediate 50% return before the market does anything. The 2026 employee contribution limit is $23,500, but most 18-24 year olds are not in a position to maximize this limit. The goal at this stage is capturing the full match, which typically requires contributing 3% to 6% of salary.
Not all employers offer a match, and not all offer immediate vesting. Check your plan documents for the vesting schedule. A three-year cliff vesting schedule means you forfeit unmatched employer contributions if you leave before three years. This matters when evaluating a job change early in your career.
Step 2: Open a Roth IRA
After capturing the employer match, a Roth IRA is the next account for most 18-24 year olds. Contributions are made after-tax, growth is tax-free, and qualified withdrawals in retirement are tax-free. At 22 with a $45,000 salary, you are likely in the 22% federal tax bracket. Paying tax now at 22% and withdrawing tax-free in retirement (when your effective rate might be higher) is a strong mathematical case for the Roth structure.
The 2026 Roth IRA contribution limit is $7,000. Eligibility phases out between $150,000 and $165,000 for single filers, and between $236,000 and $246,000 for married filing jointly. At 18-24, nearly all earners are well below the phase-out threshold. You need earned income at least equal to your contribution amount. Open a Roth IRA at a no-fee brokerage and invest in a total market index fund with an expense ratio below 0.10%.
Step 3: HSA If You Have an Eligible Health Plan
If you are enrolled in an HSA-eligible high-deductible health plan (HDHP), the HSA is arguably the most tax-efficient account available. The 2026 limits are $4,300 for self-only coverage and $8,550 for family coverage. Contributions reduce taxable income, earnings grow tax-free, and withdrawals for qualified medical expenses are tax-free. At 18-24, most healthcare costs are low, which means HSA funds can be invested and left to grow for decades, withdrawn tax-free in retirement for Medicare premiums, healthcare costs, or any expense after age 65 (at ordinary income rates, like a traditional IRA).
Step 4: Taxable Brokerage for Overflow Savings
Once you have captured the employer match, contributed to a Roth IRA, and funded an HSA (if eligible), additional savings can go into a taxable brokerage account. There are no contribution limits or eligibility requirements. The tradeoff is that capital gains and dividends are taxable annually. Long-term capital gains (assets held over a year) are taxed at preferential rates: 0% for most 18-24 year olds in lower brackets, 15% at moderate incomes. Use the same low-cost total market index funds as in your Roth IRA.
Frequently Asked Questions
What investment accounts can an 18-year-old open?
At 18, you can open a Roth IRA (if you have earned income), a traditional IRA, a taxable brokerage account, and, if employed, enroll in a workplace 401(k) or 403(b). Some brokerages allow accounts at 18 without any parental involvement; others require you to be 21 or have a custodian until then. An HSA is available if you are enrolled in an HSA-eligible high-deductible health plan, which at 18 is most common when you are employed and on your own insurance rather than a parent's plan. You cannot open a 529 plan for yourself, though a parent or grandparent can open one for your benefit. All major retail brokerages (Fidelity, Schwab, Vanguard) allow Roth IRA accounts for anyone 18 or older with qualifying earned income.
Is a Roth IRA or 401(k) better for a 22-year-old?
For most 22-year-olds, the Roth IRA is the better primary account once the 401(k) employer match is captured. A 22-year-old is almost certainly in a lower tax bracket today than they will be in retirement, making the Roth IRA's after-tax contribution structure advantageous: contributions grow and are withdrawn tax-free. The 401(k) is worth contributing to up to the match threshold (free money), and then the Roth IRA ($7,000 limit in 2026) is the next priority for most people at this income level. If your employer's 401(k) has low-cost index fund options (expense ratios below 0.10%), maxing the 401(k) beyond the match is the next step after the Roth IRA. If the 401(k) only offers high-fee funds, a taxable brokerage with index ETFs may be preferable to contributing beyond the match.
What is an HSA and who qualifies?
A Health Savings Account (HSA) is a tax-advantaged account for people enrolled in an HSA-eligible high-deductible health plan (HDHP). In 2026, an HDHP has a minimum deductible of $1,650 for self-only coverage or $3,300 for family coverage. HSA contributions are tax-deductible (reducing taxable income), grow tax-free, and can be withdrawn tax-free for qualified medical expenses. This triple tax advantage makes the HSA the most tax-efficient account available. The 2026 contribution limit is $4,300 for self-only coverage and $8,550 for family coverage. At 18-24, you qualify for an HSA if you are on an HDHP through your own employer or the individual market, and you are not enrolled in Medicare or claimed as a dependent on someone else's tax return. Being on a parent's HDHP plan does not make you eligible to contribute to your own HSA unless your parent's plan covers only you under a self-only policy.