The Complete US Tax-Advantaged Account Guide: Roth IRA, Traditional IRA, and HSA Explained

The Individual Retirement Account — or IRA — is one of the most powerful wealth-building tools available to US residents. Every dollar you invest inside a Roth IRA grows entirely free of federal income tax, with no required minimum distributions and no tax on qualified withdrawals. Used consistently over decades, these accounts can shelter an enormous amount of investment growth from the IRS.

Yet surveys show that millions of Americans still hold their investments in standard taxable brokerage accounts when tax-advantaged space remains available.

This guide covers every major account type, how the annual limits work, and how to decide which is right for you.

The Annual Contribution Limits

For 2024, the IRA contribution limit is $7,000 per person ($8,000 if age 50 or older). This total is combined across Traditional and Roth IRAs — you cannot contribute $7,000 to each.

The 401(k) limit is $23,000 for 2024 ($30,500 if age 50 or older), separate from IRA limits.

Contribution limits reset each January 1 and unused IRA allowance cannot be carried forward.

Traditional IRA

A Traditional IRA provides a potential upfront tax deduction on contributions, with investments growing tax-deferred. You pay ordinary income tax when you withdraw in retirement.

Deductibility depends on whether you or your spouse have access to a workplace retirement plan and your income level. Single filers with a workplace plan phase out of deductibility at $77,000–$87,000 MAGI (2024). Above those limits, you can still contribute but get no deduction (a non-deductible IRA).

Required Minimum Distributions (RMDs): Traditional IRA owners must begin taking RMDs at age 73. This is a key distinction from the Roth IRA.

Roth IRA

A Roth IRA is funded with after-tax dollars — you get no upfront deduction. But qualified withdrawals in retirement are completely tax-free, including all growth. There are also no RMDs during the owner's lifetime.

Income limits apply: single filers phase out at $146,000–$161,000 MAGI (2024); married filing jointly phases out at $230,000–$240,000. Above these limits, you cannot contribute directly but may be eligible for the "backdoor Roth" strategy.

Worked example — Roth IRA growth

Investing $583/month ($7,000/year) at a 7% average annual return inside a Roth IRA:

Years	Total contributed	Portfolio value
10	$70,000	$97,000
20	$140,000	$292,000
30	$210,000	$683,000

All of those gains are tax-free on qualified withdrawal. In a taxable brokerage, long-term capital gains would be taxed at 15% or 20% plus potentially the 3.8% Net Investment Income Tax.

401(k) and Employer Plans

Always contribute at least enough to your 401(k) to capture the full employer match before funding an IRA. An employer matching 50% of your contributions up to 6% of salary is a guaranteed 50% return — nothing else in your financial life can replicate that.

After capturing the full match, most financial planners suggest maxing a Roth IRA next (for tax diversification), then returning to the 401(k) for the remainder of your investable surplus.

Priority	Account	Why
1	401(k) to employer match	100% instant return on matched amount
2	Roth IRA to max ($7,000)	Tax-free growth, no RMDs
3	401(k) to annual limit ($23,000)	Tax-deferred growth
4	HSA (if eligible)	Triple tax advantage
5	Taxable brokerage	After exhausting above

Health Savings Account (HSA)

The HSA has a unique triple tax advantage: contributions are pre-tax (or deductible if made directly), growth is tax-free, and qualified medical withdrawals are tax-free. You must be enrolled in a High Deductible Health Plan (HDHP) to contribute.

2024 contribution limits: $4,150 for self-only coverage, $8,300 for family coverage. Unused balances roll over indefinitely — this is not a use-it-or-lose-it account like an FSA.

Many FIRE-focused investors maximize their HSA, invest the balance in index funds, pay current medical expenses out-of-pocket, and save receipts to reimburse themselves tax-free in retirement — effectively using the HSA as a stealth retirement account.

Choosing the Right Account Combination

Most US investors benefit from a three-account strategy:

1. 401(k) to employer match — always first
2. Roth IRA — tax-free growth and flexibility
3. HSA — if on an HDHP, triple tax advantage
4. Back to 401(k) — to the annual limit
5. Taxable brokerage — for amounts beyond the above

The worst outcome is holding large amounts in a taxable brokerage account when tax-advantaged space remains unused. At a 7% return, a $50,000 taxable portfolio versus the same in a Roth IRA differs by thousands in tax over 20 years.

Practical Next Steps

If you have cash sitting in a taxable account, move as much as possible into tax-advantaged accounts before year end. If you are beginning to invest, open a Roth IRA at a low-cost provider (Vanguard, Fidelity, or Charles Schwab) and set up a regular monthly contribution. Contribute enough to your 401(k) to claim the full employer match.

Keep it simple: a single target-date fund or a two-fund portfolio (total US market fund plus international fund) inside your Roth IRA, contributed to monthly, outperforms the vast majority of active strategies. The tax shelter is the advantage; time and consistency do the rest.