Which Retirement Account to Fill First: 401(k), IRA, HSA

Which retirement account to fund first? In order: your employer 401(k) up to the full match, then any debt above roughly 8%, then an HSA if you have a qualifying health plan, then a Roth IRA, then the rest of the 401(k), then a taxable brokerage account. The match comes first because it is an instant 50 to 100% return, and the HSA outranks both the 401(k) and the Roth because it is the only account taxed at neither end.

There are four or five places your retirement money can go, each with different tax treatment, different limits and different strings. Filling them in the wrong order costs real money over a career, but less than not filling any of them, which is worth remembering before you spend three weeks optimising.

Here is the order, and the reason for each step.

Which retirement account to fund first: the order#

1. Employer match, up to the full match.
2. High-interest debt above roughly 8%.
3. HSA to the limit, if you have a qualifying health plan.
4. Roth IRA, or backdoor Roth if your income is too high.
5. 401(k) to the annual limit.
6. Taxable brokerage, and everything else.

Now the reasoning, because the reasoning is what lets you adapt it when your situation does not match the template.

Why does the employer match always come first?#

If your employer matches 50% of contributions up to 6% of salary, contributing that 6% earns an immediate 50% return. Nothing else in this list, or in investing generally, competes with that.

On a $80,000 salary that match is $2,400 a year for putting in $4,800. Skip it for a decade and the forgone contributions alone are $24,000, before any growth.

Should you pay off debt before investing?#

A credit card at 24% is a guaranteed 24% loss every year you carry it. There is no investment that reliably beats that, so paying it off is the highest-returning thing available to you.

The rough dividing line is around 8%. Above it, clear the debt. Below it (most mortgages, most federal student loans, a subsidised car loan) running both at once is defensible, and the psychological benefit of seeing a retirement balance grow is worth something real.

The match still goes first, because a 50% match beats a 24% interest rate.

Why does the HSA outrank a 401(k)?#

This is the step people skip because it is filed under health insurance rather than retirement, and it is the most tax-efficient account available.

Every other account gets two of the three tax breaks. A traditional 401(k) is deductible going in and taxed coming out. A Roth is taxed going in and free coming out. An HSA is deductible going in, untaxed while it grows, and untaxed coming out for qualified medical expenses. Contributions made through payroll also escape Social Security and Medicare tax, which no retirement account does.

Item	2026 amount
HSA limit, self-only coverage	$4,400
HSA limit, family coverage	$8,750
HSA catch-up, age 55+Per person. Spouses each need their own HSA to both use it.	$1,000
Minimum HDHP deductible (self / family)Below this, the plan is not HSA-qualified no matter what HR calls it.	$1,700 / $3,400
Maximum HDHP out-of-pocket (self / family)	$8,500 / $17,000

What an HSA is and why it wins on tax is worth reading in full. The strategy that makes it a retirement account: pay current medical costs from cash if you possibly can, invest the HSA balance rather than leaving it in cash, and keep every receipt. There is no deadline for reimbursing yourself, so a receipt from 2026 can be reimbursed tax-free in 2056. Meanwhile the money has compounded untouched.

After 65, non-medical withdrawals are taxed as ordinary income with no penalty, which makes a worst-case HSA behave exactly like a traditional IRA. Before 65 they carry a 20% penalty, so it is not an emergency fund.

The requirement is an HSA-qualified high-deductible plan. If your employer offers one and you are generally healthy, this step is worth restructuring your health coverage around.

Step 4: the Roth IRA#

Funded with after-tax money, grows untaxed, withdrawals in retirement are tax-free. For 2026 the limit is $7,500, or $8,600 if you are 50 or older.

Why it sits above the 401(k):

• Investment choice. An IRA at a major brokerage gives you the whole market. A 401(k) gives you whatever menu your plan administrator negotiated, sometimes with poor options and high fees.
• No forced withdrawals. Roth IRAs have no required minimum distributions during the owner's lifetime, so the money can compound untouched and pass to heirs efficiently.
• Contributions come back out. You can withdraw your own contributions (not the earnings) at any time, without tax or penalty. That makes it a reasonable back-up emergency reserve, though using it that way permanently costs you that year's contribution room.
• Tax diversification. Nobody knows their retirement tax rate, which is the whole subject of traditional vs. Roth 401(k). Having both pre-tax and after-tax buckets means you can choose which to draw from.

Direct Roth contributions phase out above certain incomes. Above the limit, the standard route is a backdoor Roth: contribute to a non-deductible traditional IRA and convert it. The complication is the pro-rata rule, if you hold other pre-tax IRA balances, part of the conversion is taxable. Worth an hour with a tax professional before your first one.

Step 5: fill the 401(k)#

Back to the workplace plan for the rest.

Item	2026 amount
401(k) employee contribution limitYour own salary deferral. Employer match sits on top of this.	$24,500
Catch-up, age 50+	$8,000
Catch-up, ages 60–63A SECURE 2.0 provision. It drops back to the standard catch-up at 64.	$11,250
IRA contribution limitCombined across all your traditional and Roth IRAs, not per account.	$7,500
IRA catch-up, age 50+	$1,100

The 2026 limits come from IRS Notice 2025-67. The ages 60 to 63 catch-up is a SECURE 2.0 provision worth knowing about: it is materially larger than the standard 50-plus catch-up, and it drops back down at 64. If you are in that window, it is a short, specific opportunity.

Step 6: taxable, and the rest#

Once the tax-advantaged accounts are full, a plain brokerage account has no limits and no withdrawal restrictions. Hold tax-efficient investments here (broad index funds, which throw off little in the way of taxable distributions), and keep anything that generates ordinary income inside the sheltered accounts.

Also on this tier: 529 plans if you are saving for education, and I bonds if you want inflation-linked safety.

When does this order break?#

Templates are averages. Adjust when:

• Your 401(k) is genuinely bad. Expense ratios above roughly 1% and no low-cost index option can justify contributing only to the match and doing the rest in an IRA.
• You expect a much lower tax rate later. Someone in a high bracket now who will retire in a low-tax state has a stronger case for pre-tax contributions over Roth.
• You are early in your career. Low bracket now, higher later, so Roth contributions look better than they will at any later point.
• You are self-employed. A solo 401(k) or SEP-IRA allows far higher contributions than the employee limit, and changes the arithmetic entirely.
• Your emergency fund is empty. Three months of expenses in cash comes before steps 3 onward. Retirement contributions you have to reverse are expensive.

The part that matters more than the order#

Limits reset each January and do not carry forward. A year you did not contribute is not recoverable later: the room is simply gone.

So the honest answer to which retirement account to fund first is: the one you will actually keep funding. The difference between the perfect order and a decent one is small, and the difference between a decent order and nothing is enormous. If steps 3 through 6 are out of reach this year, do steps 1 and 2 and come back next year. The list will still be here.