What order should I fund accounts in?

Employer match first, then the HSA if you are on a qualifying high-deductible plan, then max the 401(k), then a backdoor Roth IRA if your income is above the direct limits, then a mega-backdoor Roth if your plan allows after-tax contributions and in-plan conversions, then taxable investing.

Why is the HSA ranked so highly?

It is the only account with three tax advantages: deductible contributions, tax-free growth, and tax-free qualified withdrawals. Paying current medical costs from cash flow and letting the HSA compound as an invested account turns it into the most efficient retirement dollar available.

Does the pro-rata rule block my backdoor Roth?

It does if you hold any pre-tax balance in a traditional, SEP, or SIMPLE IRA on December 31. The usual fix is rolling those balances into your current employer's 401(k) before converting. Note that the rule applies per person, so two spouses are evaluated separately.

How should a couple coordinate contributions?

Treat both plans as one system. If one plan has better funds, lower fees, or a mega-backdoor feature, prioritize it beyond the match. Coordinate HSA family limits, and avoid the common two-earner error of both partners funding into overlapping, mediocre plan menus by default.

What about the enhanced catch-up contributions?

Standard catch-up begins at 50, with a larger amount available in the 60–63 window. Higher-paid employees are generally required to make catch-up contributions on a Roth basis, which is a planning opportunity, not a penalty, for households expecting significant future taxable income.

Maximizing Tax-Advantaged Accounts

Tax-Smart Wealth Building

For a household earning $250,000 or more, the difference between using tax-advantaged accounts casually and using them deliberately is commonly six figures over a career. The accounts are not complicated individually. The value is in the sequencing — and in knowing which doors are still open once your income closes the obvious ones.

The 2026 numbers

Account	2026 limit	Tax treatment
401(k) / 403(b) elective deferral	$24,500 ($32,500 at 50+; $35,750 ages 60–63)	Pre-tax or Roth
Total 401(k) additions (all sources)	$72,000	Enables the mega-backdoor Roth
Traditional / Roth IRA	$7,500 ($8,600 at 50+)	Deductible or tax-free
HSA	$4,400 self / $8,750 family (+$1,000 at 55+)	Triple advantage
FSA (health)	~$3,400	Pre-tax, use-it-or-lose-it
Dependent care FSA	$7,500	Pre-tax childcare
529 plan	Gift-tax annual exclusion applies; 5-year front-loading allowed	Tax-free growth for education

Note the catch-up wrinkle: high earners (wages above roughly $145,000, indexed) must make 401(k) catch-up contributions as Roth, not pre-tax.

The order that maximizes the outcome

Employer match, in full. Nothing else competes.
HSA to the limit, if you're on a high-deductible plan — deductible going in, tax-free growth, tax-free out for qualified medical costs. Pay today's medical bills from cash, save the receipts, and let the account compound for decades.
Max the 401(k) elective deferral.
Backdoor Roth IRA if you're over the direct contribution limits. Contribute non-deductible to a traditional IRA, convert promptly. Watch the pro-rata rule: any pre-tax IRA balance — including a rollover IRA from an old job — makes the conversion partly taxable. The fix is usually rolling that IRA into your current 401(k) first.
Mega-backdoor Roth — after-tax 401(k) contributions plus in-plan Roth conversion, up to the $72,000 total. Only some plans allow it; if yours does, it's the largest remaining tax-advantaged space available to a high earner.
Dependent care FSA and 529s once children are in the picture.
Taxable brokerage for everything else, managed for tax efficiency.

Roth vs. pre-tax, decided properly

The real question is your marginal rate now versus at withdrawal. Two-high-income couples in their peak years usually favor pre-tax deferrals, then convert aggressively in low-income windows: a sabbatical, a startup year, a business loss, or the gap between retirement and the start of Social Security and RMDs. Roth balances also carry no lifetime RMDs and pass to a partner or heir tax-free, which matters more for unmarried couples who lack spousal rollover treatment.

Watch the downstream effects. Large pre-tax balances become large RMDs at 73 or 75, which drive Medicare IRMAA surcharges — see our Social Security & IRMAA guide.

Tax efficiency outside the wrappers

Asset location: bonds, REITs, and high-turnover strategies belong in tax-deferred accounts; broad equity index funds and municipal bonds in taxable.
Harvest losses in down markets and carry them forward. $3,000 a year offsets ordinary income; the rest offsets gains indefinitely.
Give appreciated shares rather than cash, ideally through a donor-advised fund in a high-income year.
Coordinate ESPP and RSU sales with your bracket, the 3.8% net investment income tax, and any AMT exposure from ISOs.

Where households leave money behind

The recurring misses we find: never checking whether the plan allows after-tax contributions; leaving a rollover IRA in place and quietly poisoning the backdoor Roth; using the HSA as a checking account; contributing to a Roth IRA directly while over the income limit and creating an excess-contribution problem; and both partners choosing benefits independently rather than as one household decision.

If you want the whole stack mapped against your actual pay, equity, and benefits, schedule an intro call.