The Tax-Smart Withdrawal Order: Which Retirement Accounts to Tap First
The conventional wisdom says taxable first, then tax-deferred, then Roth. It is a decent default — but breaking the rule in the right years is where the real tax savings hide.
Three tax buckets, three sets of rules
Most retirees hold money in up to three tax categories:
- Taxable (brokerage, savings): dividends and realized gains taxed yearly; long-term gains get preferential rates and a step-up at death
- Tax-deferred (traditional IRA/401(k)): every withdrawal taxed as ordinary income; RMDs eventually force distributions
- Tax-free (Roth IRA/401(k)): qualified withdrawals are completely tax-free with no lifetime RMDs
The conventional order
Taxable first, tax-deferred second, Roth last. The logic: let tax-advantaged accounts compound as long as possible, and let the Roth — the most valuable bucket — grow longest of all.
As a default, it is reasonable. As a rigid rule, it often backfires.
Where the conventional order goes wrong
Draining taxable accounts first can leave you with near-zero taxable income in your 60s — wasting the 10% and 12% brackets year after year — followed by enormous RMDs in your 70s and 80s taxed at 24% or more. The result is a lifetime tax bill far higher than necessary.
Smarter: blend the buckets
A tax-smart plan usually looks more like this:
- Spend from taxable for baseline cash flow.
- Fill the low brackets every year with IRA withdrawals or Roth conversions — even if you do not need the money — so no cheap tax space is wasted.
- Use Roth withdrawals surgically in years when extra income would trigger a threshold: IRMAA surcharges, the top of a bracket, capital-gains rate bumps, or the Social Security tax torpedo.
- Harvest long-term gains at 0% when taxable income is low enough — married couples can realize tens of thousands in gains tax-free in some years.
Thresholds worth managing around
- The top of the 12% and 22% brackets
- IRMAA Medicare premium tiers (based on income from two years prior)
- The 0% long-term capital gains ceiling
- Income levels where more of your Social Security becomes taxable
The bottom line
Withdrawal sequencing is not about one clever trick — it is about keeping your taxable income smooth across three decades instead of low-then-spiking. Compare strategies side by side in a year-by-year projection and measure the difference in lifetime taxes and ending portfolio value.