Which Investment Accounts to Use First
There are two main buckets of investment accounts: standard (taxable) and tax-advantaged. The tax-advantaged accounts are the single biggest edge available to everyday investors — they let your money compound without being chipped away by annual taxes.
The order you fill them in matters more than which specific investments you pick inside them.
The Hierarchy of Saving
Generally, fill these accounts in this order:
- 401k up to the employer match — Free money. A 50-100% instant return.
- HSA — Triple tax advantage (if you’re eligible).
- Roth IRA — Tax-free growth forever.
- 401k up to the max — Lowers your taxable income.
- Taxable brokerage — For everything beyond tax-advantaged limits.
Account Types and Limits
Contribution limits change annually. The numbers below are for 2025 — always verify the current year’s limits at irs.gov.
401k / 403b / TSP
Employer-sponsored retirement plans.
| Traditional 401k | Roth 401k | |
|---|---|---|
| 2025 limit | $23,500 (under 50) / $31,000 (50+) | Same |
| Tax on contributions | Pre-tax (lowers taxable income now) | After-tax (no deduction now) |
| Tax on growth | Tax-deferred | Tax-free |
| Tax on withdrawal | Taxed as ordinary income | Tax-free (if qualified) |
| Employer match | Always goes into Traditional bucket | Same — match is always pre-tax |
Key feature: The employer match. If your employer matches 50% of contributions up to 6% of salary, that’s a guaranteed 50% return on those dollars. Always capture the full match before doing anything else.
IRA (Individual Retirement Account)
You open this yourself at a brokerage (Vanguard, Fidelity, Schwab, etc.).
| Traditional IRA | Roth IRA | |
|---|---|---|
| 2025 limit | $7,000 (under 50) / $8,000 (50+) | Same |
| Tax on contributions | May be deductible | After-tax |
| Tax on withdrawal | Taxed as ordinary income | Tax-free (if qualified) |
| Early withdrawal | Penalty + taxes | Contributions can be withdrawn anytime, penalty-free |
2025 Roth IRA income limits: Contributions phase out at $150,000-$165,000 (single) and $236,000-$246,000 (married filing jointly).
If your income exceeds the Roth IRA limits, there’s a legal workaround:
- Contribute to a Traditional IRA (non-deductible — anyone can do this regardless of income)
- Convert the Traditional IRA to a Roth IRA shortly after
The key requirement is that you should have no existing pre-tax Traditional IRA balance — otherwise the conversion triggers the pro-rata rule.
If you have old Traditional IRA balances, you may be able to roll them into your 401k first to clear the way.
HSA (Health Savings Account)
The “triple tax advantage” — the only account type in the U.S. tax code that’s tax-advantaged on the way in, while it grows, and on the way out.
- Contributions reduce your taxable income
- Growth is tax-free
- Withdrawals for eligible medical expenses are tax-free
2025 limits: $4,300 (individual) / $8,550 (family). Plus $1,000 catch-up if 55+.
Eligibility: You must be enrolled in a
The long-game strategy: Many people pay medical bills out of pocket now, save the receipts, and let their HSA grow invested for decades. You can reimburse yourself for those old medical expenses at any time in the future.
Taxable Brokerage Account
The standard investment account. No contribution limits, no tax advantages, no restrictions on when you can access your money. Use this for money beyond your tax-advantaged limits and near-term savings goals.
Other Accounts
FSA (Flexible Spending Account): “Use it or lose it” — funds generally don’t roll over.
529 Plan: State-sponsored education savings. Tax-free for qualified education expenses. Since 2024, unused 529 funds can be rolled into a Roth IRA (up to $35,000 lifetime, subject to conditions).
Roth vs Traditional: The Decision
Roth = pay taxes now, withdraw tax-free later. Traditional = skip taxes now, pay taxes on withdrawal.
The question is: will your tax rate be higher now or in retirement?
| If you expect… | Then lean toward… | Why |
|---|---|---|
| Higher taxes in retirement | Roth | Pay the lower rate now |
| Lower taxes in retirement | Traditional | Skip the higher rate now |
| About the same | Roth | Tax-free growth is more flexible |
| You’re not sure | Roth | Tax diversification gives you options |
Try It: Compare the Numbers
Roth vs Traditional Comparison
This is a simplified comparison. Real-world factors (state taxes, deduction changes, RMDs, Social Security taxation) add complexity. Consider consulting a tax professional.
Once you have multiple account types, you can be strategic about which investments you put where:
| Account type | Best investments to hold here | Why |
|---|---|---|
| Roth IRA / Roth 401k | Highest expected growth (stocks) | All growth is tax-free |
| Traditional IRA / 401k | Bonds, REITs, high-dividend funds | Hide ordinary income from annual taxes |
| Taxable brokerage | Low-turnover index funds, tax-efficient ETFs | Minimize taxable events |
This optimization adds roughly 0.1-0.3% per year in after-tax returns. Worth doing once your portfolio spans multiple account types.
This guide is for informational purposes only and is not financial advice. Read the full disclaimer.