Which account to draw from first

Someone with taxable, tax-deferred and Roth accounts has to decide which to spend first. The order affects the total tax paid over retirement, sometimes considerably.

The conventional order

Standard advice is: taxable accounts first, then tax-deferred, then Roth.

The logic is to preserve tax-advantaged growth as long as possible and to defer taxation.

It is a reasonable default and it is frequently not optimal, for a specific reason.

The problem with pure deferral

Draining taxable accounts first while tax-deferred balances continue growing sets up a situation where required minimum distributions later force large withdrawals into high brackets.

Those forced withdrawals can also affect other things: the taxation of Social Security benefits, Medicare premium surcharges, and capital gains rates.

The result is a retirement with very low taxable income early and unnecessarily high taxable income later — which pays more total tax than a smoother path would.

The better general approach

Rather than exhausting accounts in sequence, the approach with better support is to manage taxable income to a target level each year, drawing from whichever accounts achieve it.

In practice this frequently means:

Drawing enough from tax-deferred accounts each year to use up the standard deduction and the lower brackets, even in years when you do not need the money.

Making up the remainder of spending needs from taxable or Roth accounts.

Converting additional amounts from tax-deferred to Roth in years where there is room in a low bracket.

The objective is to smooth taxable income across retirement rather than to minimise it in any single year.

The gap years

The period between retiring and the start of Social Security and required distributions is the single most valuable planning window most people get.

Taxable income during these years can be very low, which creates room for conversions at low rates.

Someone retiring at sixty-two who delays benefits to seventy has eight such years, and the cumulative effect of using them well can be substantial.

The constraint to watch is health insurance. Where coverage is purchased through an exchange with income-based subsidies, additional taxable income from conversions reduces the subsidy, which functions as an additional effective tax rate.

That interaction frequently changes the answer and it is easy to miss.

Taxable account specifics

Several features make taxable accounts more useful than the conventional ordering implies.

Long-term capital gains are taxed at preferential rates, and at lower income levels the rate can be zero, which makes realising gains in low-income years genuinely inexpensive.

Losses can be harvested to offset gains.

And under current rules, assets held at death generally receive a step-up in cost basis, which can eliminate the tax on unrealised gains for heirs.

That last point argues against fully depleting a taxable account with large embedded gains if leaving assets to heirs is a goal.

Roth accounts last, usually

The conventional wisdom holds reasonably well here.

Roth balances grow tax free, are not subject to required distributions for the original owner, and are the most valuable assets to inherit.

The exception is using Roth withdrawals tactically — to cover a large one-off expense without pushing taxable income into a higher bracket, or to avoid crossing a threshold that triggers Medicare surcharges.

Used this way, Roth accounts function as a tool for managing marginal rates rather than simply as the last resort.

The thresholds to watch

Several income levels have effects that exceed the marginal tax rate at that point.

The point at which Social Security benefits become partly taxable. The income levels at which Medicare premiums increase. The threshold for the additional tax on net investment income. Subsidy cliffs for exchange-purchased health coverage.

Crossing one of these can produce an effective marginal rate substantially higher than the nominal bracket, which is why annual planning around specific thresholds is worth more than a general ordering rule.

General information only, not financial or tax advice. Thresholds and rules change annually and vary by circumstance — consult a qualified tax professional or adviser about your own situation.