How to Pay Less Tax on 401(k) Withdrawals

Here's an uncomfortable way to read your 401(k) statement.

That $2,000,000 balance? You don't own all of it. The IRS has been a silent partner since your very first contribution, and their share gets settled later — at rates nobody has set yet, on a schedule that eventually stops being your choice.

A traditional 401(k) was never tax-free. It's tax-deferred. Deferred is a promise, not a pardon.

The good news: you get to influence when that bill comes due, how big each slice is, and which account it comes from. That's most of the game.

The bad news: almost all of the leverage exists before your first withdrawal. Let's go. 👇

This is the concept that makes everything else make sense, and most people have it backwards.

When you contributed, you skipped tax at your marginal rate the top of your stack. 24%, 32%, whatever your last dollar was taxed at.

When you withdraw in retirement, you don't pay that rate on everything. You refill the tax code from the bottom: standard deduction first (taxed at zero), then 10%, then 12%, then 22%.

So a retiree pulling a moderate income from a traditional IRA can have an effective rate in the low teens while having deducted at 24% or 32%.

Two more things people get wrong:

Crossing into a higher bracket does not re-tax your whole income. Only the dollars inside that bracket pay the higher rate. Nobody has ever lost money by earning one extra dollar of ordinary income.

Somebody has to fill those cheap brackets. If you go 100% Roth, you arrive in retirement with nothing to run through the 0% and 10% bands. That's wasted space you paid full price to avoid.

There's a stretch in most retirements where the tax code briefly hands you the steering wheel:

Retire at 62, delay Social Security to 70, and that's eight years where you personally decide how much taxable income exists in the world.

Compare the same $50,000 of recognized income:

Same $50,000. Wildly different tax. The only variable is when.

And the window isn't infinite. Under current rules RMDs generally begin at 73. Every gap year you don't use is gone permanently.

Nobody good converts "the account." They convert up to a line.

For 2026, joint filers run through 10%, 12%, 22%, 24%, 32%, 35% and 37%, with the 24% bracket spanning roughly $211,400 to $403,550 of taxable income.

That's not a target. It's a map. The method:

A retired couple with $750,000 traditional and $40,000 of income might convert $45,000–$60,000 a year for a decade. Boring annually. Transformative cumulatively.

Two pro moves:

Pay the conversion tax from outside cash. If you withhold the tax from the conversion itself, less money lands in the Roth — and under 59½ the withheld amount can also get hit with the 10% penalty. Paying from a brokerage account is effectively a bonus Roth contribution that dodges every contribution limit.

Convert in kind, after a drop. Move the shares, not cash. A 20% market decline is a 20%-off coupon on conversion tax, and the rebound happens inside the Roth.

Your real marginal rate isn't your bracket. It's your bracket plus whatever these trip.

1. The Social Security tax torpedo. How much of your benefit is taxable depends on your other income — the calculation uses half your benefits plus other income including tax-exempt interest, against a base amount of $32,000 for joint filers. Inside the phase-in zone, each extra $1,000 withdrawn can make up to $850 of Social Security taxable too. Your stated 22% bracket can behave like something closer to 40%.

2. IRMAA, two years late. Medicare surcharges are set from your tax return two years earlier, and they're cliffs, not ramps. Convert at 63, pay a higher premium at 65. One dollar over a threshold moves you an entire tier for a full year.

3. ACA subsidies, if you're under 65. Marketplace premiums are income-tested. A conversion can cut your lifetime tax bill and blow up this year's health insurance simultaneously. For early retirees this is often the binding constraint, not the bracket.

Here's a genuinely underused one.

Long-term capital gains and qualified dividends have their own rate schedule — and for taxpayers with modest taxable income, the rate is 0%.

Which means a retiree in a low-income gap year has two different kinds of free space to fill:

The catch: these two compete. Ordinary income stacks underneath capital gains and pushes them up out of the 0% band. So you can't max both — you have to choose which space is worth more this year.

That's a real decision, and almost nobody makes it on purpose.

Tax flexibility in retirement comes entirely from having more than one kind of money.

Two retirees, both with $2 million:

Same net worth. Completely different tax lives. And note that Roth 401(k)s and Roth IRAs have no lifetime RMDs for the original owner — so Roth money never forces itself onto your tax return.

QCDs — if you give to charity anyway. From 70½, a Qualified Charitable Distribution sends money straight from an IRA to a qualified charity, can satisfy part or all of your RMD, and stays out of your AGI entirely. The current annual limit is $108,000. That's better than withdrawing, paying tax, then donating and hoping for a deduction — especially since most retirees take the standard deduction and get no charitable benefit at all. Corollary: never convert money you plan to leave to charity. Charities pay no income tax; you'd be volunteering for a bill nobody was going to owe.

NUA — if your 401(k) holds company stock. Net Unrealized Appreciation can let you pay ordinary income tax only on the shares' original cost basis, with the appreciation taxed at long-term capital gains rates instead. On $200,000 of stock with a $40,000 basis, that's a six-figure swing in treatment. Roll those shares into an IRA and the election generally vanishes forever.

The Rule of 55 — if you retire early. Separate from your employer during or after the year you turn 55, and distributions from that plan can escape the 10% early-withdrawal tax. It's tied to the employer plan, not to you — roll it to an IRA and the exception evaporates. Check this before the rollover paperwork.

The widow's penalty — plan for it in advance. When one spouse dies, the survivor eventually files as single: roughly half the standard deduction and far narrower brackets. Income barely drops — RMDs continue, the larger Social Security check continues — but the rate jumps. Conversions done while both spouses are alive are, among other things, insurance against this.

Your heirs' brackets. Under the SECURE Act most non-spouse beneficiaries must empty an inherited account within 10 years. Leave a traditional IRA to a 45-year-old in peak earning years and the IRS takes a large bite. Leave a Roth — same 10-year clock, tax-free withdrawals.

Withholding is not your tax bill. Take $100,000 as a distribution paid to you and the plan generally must withhold 20% for federal tax. You receive $80,000 — but that $20,000 is just a deposit. Your actual liability comes out of your full return; you may owe more, or get some back. And if you meant to roll the money over, you must replace that withheld 20% from your own pocket within 60 days or it becomes a taxable distribution. Use direct, trustee-to-trustee rollovers. Always.

Big withdrawals create estimated-tax problems. A large conversion or distribution creates tax due now, not next April. Miss safe harbor and you owe underpayment penalties. Handy trick: tax withheld is treated as paid evenly across the year, while quarterly estimates are dated — which is why late-year moves are often paired with bumped-up withholding elsewhere.

Federal tax follows you everywhere. State tax doesn't.

Some states have no individual income tax; others tax retirement income; several exempt some or all of it. Two identical 401(k)s can produce very different net income depending on the ZIP code.

The sequencing detail nobody mentions: if you're moving to a no-income-tax state, converting before the move means volunteering for a state tax you were about to escape. Do the conversions after establishing residency, not before.

(And moving is never only about tax — property tax, insurance, healthcare and housing all move with you.)

If an ad promises to make your 401(k) withdrawals tax-free via a trust, an entity, or a clever insurance wrapper, ask one question:

"Which specific tax rule produces the savings?"

Traditional 401(k) distributions are taxable when received. A trust doesn't change that. There are legitimate uses for trusts — estate planning, control, protection — but converting ordinary income into thin air isn't one of them.

Every real strategy on this page has a name and a citation: bracket management, Roth conversions, QCDs, NUA, asset location, capital-gains planning. If the pitch can't be explained in those terms, it's marketing.

Write down where every dollar sits and what kind of tax it creates:

Then run the timeline: 55 → 60 → 65 → 70 → 73+, estimating earned income, Social Security, withdrawals, gains, RMDs and giving at each stage.

Because here's the punchline of the whole article: needing $80,000 to live does not mean taking $80,000 from the traditional account. It might mean $40,000 traditional, $25,000 brokerage, $15,000 Roth — and a $30,000 conversion on top while the bracket is cheap.

Same lifestyle. Very different lifetime tax bill.

You can't make a traditional 401(k) tax-free. You can absolutely change how much of it the IRS ends up with.

The mental shift is simple. Retirement planning doesn't end when you finish accumulating. That's halftime.

And almost every good answer to that question has to be set up years before your first withdrawal.

See you next issue. 🪙

Penny Brief is for informational and educational purposes only and is not individualized tax, legal or investment advice, and this covers U.S. federal rules only. Figures cited: 2026 federal brackets for joint filers of 10–37% with the 24% bracket running roughly $211,400–$403,550 of taxable income; RMDs generally beginning at age 73 under current rules; the $32,000 joint-filer base amount in the Social Security taxability calculation; QCDs available from age 70½ with a $108,000 annual limit; 20% mandatory withholding on many taxable plan distributions paid directly to you; the separation-from-service exception at age 55; the SECURE Act 10-year rule for most non-spouse beneficiaries; and the elimination of lifetime RMDs for Roth IRAs and designated Roth accounts for the original owner. All dollar examples are simplified illustrations. State tax treatment, plan documents, filing status, account basis and age materially change outcomes, and tax law changes. Model a large conversion or withdrawal strategy with a qualified tax professional before acting — conversions cannot be undone.

Sources: Internal Revenue Service (401(k) and Roth taxation, rollovers and withholding, RMDs, Roth conversions, QCDs, NUA, exceptions to the early-distribution tax, taxation of Social Security benefits, capital gains rates); SECURE Act and SECURE 2.0 provisions; CMS and SSA (Medicare IRMAA).