The 3 Tax Levers Every Retirement Account Pulls

Retirement Accounts Are Simpler Than They Look

401(k). 403(b). 457. IRA. SEP IRA. SIMPLE IRA. Solo 401(k). Profit sharing plan. Cash balance plan. HSA. 529.

The list of tax-advantaged accounts is long, and it's easy to feel like you need a tax degree to sort through it.

But here's the good news. When it comes to taxes, every one of these accounts can only pull three levers. That's it.

Once you understand those three levers, comparing accounts gets a lot easier. You stop asking which account is "best" and start asking which levers you want to pull right now.

The Three Tax Levers, Explained

Every dollar you put into a retirement account can save you taxes at three different points in its life.

Lever 1: Taxes Today

This lever lowers your tax bill in the year you contribute.

You either get a tax deduction, or the money comes out of your paycheck before income taxes are calculated. Either way, your taxable income goes down now.

Lever 2: Taxes Over Time

This lever lets your investments grow without being taxed each year.

In a regular brokerage account, you may owe taxes on dividends, interest, and capital gains every year you sell or receive income. Inside a tax-advantaged account, that growth compounds without an annual tax drag.

Lever 3: Taxes Later

This lever lets you take money out without paying taxes on the withdrawal.

When you use the money for its intended purpose and follow the rules, the withdrawals, including all the growth, are tax-free.

Why the Levers Matter

Almost every retirement account pulls the middle lever. The real difference between accounts comes down to whether you get your tax break at the beginning or at the end.

That single choice drives most of the traditional versus Roth decision.

Traditional Contributions: Taxes Today and Taxes Over Time

Traditional, or pre-tax, contributions pull the first two levers.

You get a tax break now, and your money grows tax-deferred. In exchange, you pay ordinary income tax on every dollar you withdraw in retirement, including the growth.

This is how most traditional 401(k), 403(b), and 457 contributions work, along with deductible traditional IRA contributions.

Employer Contributions Work the Same Way

Employer matches and profit sharing contributions are usually pre-tax too.

You don't take a deduction for them, but you also don't pay income tax on them when they land in your account. The effect is the same as a deduction: no tax today, tax-deferred growth, and ordinary income tax when you withdraw.

If you own the business, there's an extra benefit. Those contributions are generally deductible to the business as well.

When Traditional Contributions Make Sense

Pulling the "taxes today" lever is most valuable when you're in a high tax bracket now and expect to be in a lower one in retirement.

For many high earners in their peak earning years, that's a reasonable bet. Every dollar you contribute saves taxes at your highest marginal rate.

Roth Contributions: Taxes Over Time and Taxes Later

Roth contributions pull the second and third levers.

You contribute money you've already paid taxes on, so there's no deduction today. But the money grows tax-free, and qualified withdrawals in retirement are completely tax-free.

This applies to Roth IRAs and to Roth contributions inside a 401(k), 403(b), or 457 plan.

When Roth Contributions Make Sense

The "taxes later" lever is most valuable when you expect your tax rate in retirement to be the same as or higher than it is today.

That's often the case early in your career, in a lower-income year, or if you expect tax rates to rise in the future.

Roth money also offers flexibility. Roth IRAs have no required minimum distributions during your lifetime, and tax-free withdrawals don't push up your taxable income in retirement.

What About 529 Plans?

529 education savings plans follow a similar pattern to Roth accounts. There's no federal deduction for contributions, the money grows tax-deferred, and withdrawals are tax-free when used for qualified education expenses.

Some states offer a state income tax deduction for 529 contributions, which adds a partial "taxes today" benefit. California does not.

One-Lever Contributions: Tax-Deferred Growth Only

A few types of contributions only pull the middle lever.

The most common is a nondeductible traditional IRA contribution. If your income is too high to deduct a traditional IRA contribution, you can still contribute, but with after-tax dollars.

The growth is tax-deferred. But when you withdraw, the earnings are taxed as ordinary income. You get no break today and no tax-free withdrawal later.

After-tax (non-Roth) contributions to a 401(k), where a plan allows them, work the same way.

Your after-tax contributions themselves are not taxed again when withdrawn; the earnings generally are. Keep track of your basis, and report nondeductible IRA contributions on IRS Form 8606. Roth conversions can be subject to the pro-rata rule when you hold other pre-tax IRA balances.

Why Anyone Uses Them

On their own, one-lever contributions are the weakest option. But they're often a stepping stone.

High earners frequently make nondeductible IRA contributions and then convert them to a Roth IRA. This is commonly called a backdoor Roth. After-tax 401(k) contributions can sometimes be converted to Roth as well, which is often called a mega backdoor Roth.

These strategies come with rules that can create unexpected taxes if they're done wrong, so they're worth planning carefully.

The HSA: The Only Account That Pulls All Three Levers

There's one account that can pull all three levers at once when it's used correctly. That's the health savings account, or HSA.

Here's how it works:

• Taxes today: Contributions are tax-deductible, or pre-tax if made through payroll. Payroll contributions also avoid Social Security and Medicare taxes.

• Taxes over time: The money can be invested and grows tax-free.

• Taxes later: Withdrawals are tax-free when used for qualified medical expenses.

No other account offers that combination. It's often called the triple tax advantage.

These HSA benefits apply to federal taxes. California does not conform to the federal HSA tax treatment: contributions are not deductible for California income tax, and HSA interest and investment earnings may be taxable by the state.

The Catch: Eligibility and Limits

To contribute to an HSA, you need to be covered by a qualifying high-deductible health plan. For 2026, that means a minimum deductible of $1,700 for self-only coverage or $3,400 for family coverage.

The contribution limits are also relatively small. For 2026, you can contribute up to $4,400 with self-only coverage or $8,750 with family coverage. If you're 55 or older, you can add a $1,000 catch-up contribution.

A qualifying deductible alone does not establish HSA eligibility. Other coverage, Medicare enrollment, dependent status, and the plan's out-of-pocket limits also matter. Employer contributions count toward your annual limit, and partial-year eligibility can affect how much you may contribute.

How to Get the Most From an HSA

Many people use their HSA like a checking account for doctor visits. That works, but it leaves most of the value on the table.

If your budget allows, consider paying current medical costs out of pocket and letting your HSA stay invested. Keep your receipts, because you can generally reimburse yourself for qualified expenses years later, as long as they were incurred after you opened the HSA.

After age 65, you can also withdraw HSA money for non-medical expenses without a penalty. You'll pay ordinary income tax on it, just like a traditional IRA.

Which Tax Levers Each Account Pulls

Here's how the most common accounts line up.

Traditional 401(k), 403(b), 457 — Taxes today: Yes; taxes over time: Yes; taxes later: No.

Roth 401(k), 403(b), 457 — Taxes today: No; taxes over time: Yes; taxes later: Yes.

Deductible traditional IRA — Taxes today: Yes; taxes over time: Yes; taxes later: No.

Nondeductible traditional IRA — Taxes today: No; taxes over time: Yes; taxes later: No.

Roth IRA — Taxes today: No; taxes over time: Yes; taxes later: Yes.

SEP IRA, SIMPLE IRA — Taxes today: Yes; taxes over time: Yes; taxes later: No.

Solo 401(k) — Taxes today: Depends on traditional or Roth; taxes over time: Yes; taxes later: Depends on traditional or Roth.

Profit sharing plan, cash balance plan — Taxes today: Yes; taxes over time: Yes; taxes later: No.

529 plan — Taxes today: Only in some states; taxes over time: Yes; taxes later: Yes, for qualified education.

HSA — Taxes today: Yes; taxes over time: Yes; taxes later: Yes, for qualified medical.

A few notes on this table. Recent law changes allow Roth versions of SEP and SIMPLE IRA contributions, though not every provider offers them yet. Employer contributions in most plans are pre-tax by default.

The pattern is clear. Nearly every account gets the middle lever. Your real decision is whether to take your tax break at the front or the back.

How to Decide Which Levers to Pull

There's no single right answer for everyone. But a few questions can point you in the right direction.

Compare Your Tax Rate Now and Later

The biggest factor is how your tax rate today compares to your expected tax rate in retirement.

If you're in a high bracket now and expect a lower one later, traditional contributions often make more sense. If you're in a lower bracket now, or expect higher taxes later, Roth contributions often come out ahead.

Most people can't predict their future tax rate with certainty. That's why many families use both.

Build Tax Diversification

Having money in pre-tax, Roth, and taxable accounts gives you flexibility in retirement.

You can choose which account to pull from each year based on your tax situation at the time. That control can help you manage your tax bracket, Medicare premiums, and how much of your Social Security is taxed.

Special Considerations for Business Owners

Business owners often have access to accounts most employees don't, like Solo 401(k)s, SEP IRAs, profit sharing plans, and cash balance plans.

These plans can allow much larger contributions than a standard 401(k). A cash balance plan in particular can let older, high-earning owners put away well into six figures per year, depending on age and income.

That makes the "taxes today" lever especially powerful in high-income years. But it's worth balancing with Roth savings, so you don't end up with nearly everything in pre-tax accounts.

Don't Forget the HSA

If you're eligible for an HSA, it often deserves a spot near the top of your savings priorities. It's the only account that offers all three tax breaks, even with its smaller limits.

Three Levers, One Clear Framework

The alphabet soup of retirement accounts can feel overwhelming. But when it comes to taxes, every account comes down to the same three levers: taxes today, taxes over time, and taxes later.

Traditional contributions give you a break now. Roth contributions give you a break later. Nearly all of them let your money grow without an annual tax bill. And the HSA, if you qualify, gives you all three.

Understanding which levers you're pulling is the foundation for every other retirement decision you'll make.

From there, the right mix depends on your income, your business, your family, and the kind of retirement you're working toward.

Sources

IRS Publication 969 — Health Savings Accounts and Other Tax-Favored Health Plans: https://www.irs.gov/publications/p969

IRS Revenue Procedure 2025-19 — 2026 HSA contribution limits and HDHP thresholds: https://www.irs.gov/pub/irs-drop/rp-25-19.pdf

California Franchise Tax Board — 2025 Schedule CA (540) instructions, Health Savings Accounts: https://www.ftb.ca.gov/forms/2025/2025-540-ca-instructions.html

IRS Form 8606 — Nondeductible IRAs: https://www.irs.gov/forms-pubs/about-form-8606