Why the years right around retirement quietly decide how much of your money you actually keep — and the questions most people are never asked.
Most people assume their advisor is doing both. Very often, only one is happening.
If you have an advisor, they’re probably good at one thing: managing your investments — picking funds, balancing risk, growing the account. Many do it well.
But there’s a second job that decides how much of that money you actually keep, and it usually has no owner:
This is retirement tax planning — not investment management. They’re related, but being excellent at one does not mean the other is being done at all.
If no one has walked you through those points using your numbers, that’s the gap. It isn’t a knock on your advisor — it’s a job that falls through the cracks, and it’s the one that tends to cost the most when it’s missed.
Once required withdrawals begin, they don’t just get taxed and stop there. The income they create can set off a chain — each cost quietly triggering the next. Most people only budget for the first link.
None of this means a withdrawal is wrong. It means the size and timing matter — and that one decision, made in isolation, can set off costs in two places you weren’t even looking. The next sections take the least-understood links one at a time.
Once required minimum distributions begin, the IRS sets a minimum you must withdraw each year — and that minimum grows as a share of your account as you age, whether you need the money or not. At 73 it’s about 3.8% of the balance. By 90, it’s more than double that. Every dollar of it is taxable income.
Here’s the part that surprises people: if the account keeps growing faster than the early withdrawals, the balance — and the future tax bill — can keep rising for years after RMDs begin. The window to do anything about it is largely the low-income years before 73.
Whether your wall is 73 or 75 turns on your birth year — and for one cohort, Congress briefly wrote both answers into law. Read the deep dive on the 1959/1960 boundary.
IRMAA raises your Medicare premiums once your income crosses a line. It’s a cliff, not a ramp — one dollar over a threshold jumps you to the full higher premium. And it’s billed on your income from two years earlier.
| 2026 Tier | Married filing jointly (2024 income) | Single (2024 income) | Part B / mo | Extra / yr (per person) |
|---|---|---|---|---|
| Standard | $218,000 or less | $109,000 or less | $202.90 | — |
| Tier 1 | $218,001 – $274,000 | $109,001 – $137,000 | $284.10 | + $974 |
| Tier 2 | $274,001 – $342,000 | $137,001 – $171,000 | $405.90 | + $2,436 |
| Tier 3 | $342,001 – $410,000 | $171,001 – $205,000 | $527.60 | + $3,896 |
| Tier 4 | $410,001 – $750,000 | $205,001 – $500,000 | $649.40 | + $5,358 |
| Tier 5 | Above $750,000 | Above $500,000 | $689.90 | + $5,844 |
The timing is its own trap — the premium arrives two years after the income, and the appeal form only helps in specific cases. Read the deep dive on the two-year lookback.
A Roth conversion is smart — but it lands on top of the income you already have. Stack a large conversion onto a $150,000 income and it climbs straight through the brackets. The first slice is taxed at 22%. The top of it slams into 32% — nearly a third gone — well before you’ve converted it all.
Filing single or widowed? The brackets are cut roughly in half — the 32% wall arrives near $202,000 of income instead of $404,000. That same $300,000 conversion blows past 32% and drives its top dollars into 35%. The survivor pays the most on the very same move.
And the famous “five-year rule” on conversions? It’s actually two different clocks — and past 59½, only one usually matters. Read the deep dive on the two 5-year rules.
When one spouse passes, the survivor usually keeps most of the household income — the larger Social Security check continues, the full IRA and its required withdrawals continue. But the very next year, they file as single. The tax brackets and the standard deduction roughly cut in half — while the income doesn’t.
Why it bites: for a single filer, the higher brackets begin at roughly half the income they do for a couple, and the standard deduction drops from $32,200 to $16,100 (2026). The same income that sat comfortably in a lower band as a couple can spill into a much higher one for the survivor.
The quietest consequence of the whole plan: the lowest-tax years are often the ones while both spouses are alive and filing jointly. That window narrows the moment a return becomes a single one — which is why when matters as much as whether.
What actually halves, what the survivor keeps, and the appeal most people never learn exists — read the deep dive on the widow’s penalty.
Since the SECURE Act, most non-spouse heirs — your adult children — can no longer “stretch” an inherited IRA over their lifetime. They must empty it within 10 years. And under the 2024 final rules, if you’d already started your own required withdrawals, they must take a taxable distribution every year along the way.
The trap: heirs usually inherit in their own highest-earning years. Ten years of forced withdrawals stack on top of their salary — often pushing them into the top brackets, on money you spent a lifetime saving.
Whether your heirs owe a withdrawal every year inside the ten — and why an inherited Roth plays by gentler rules — read the deep dive on the 10-year rule.
Run these on any strategy or product — including the ones you already own. Pass all five, it may genuinely fit. Stumble on two or three — that’s not a “no.” It’s a “slow down and get a second set of eyes.”
There are ways to convert faster and more aggressively than the steady, year-by-year approach. For the right person, in the right situation, they can be powerful. For the wrong one, they’re expensive — and many of the decisions simply can’t be undone.
Whether an accelerated plan fits you depends entirely on your situation. It has to be structured carefully, understood clearly, and weighed against what you’d be giving up — because once you commit, there’s often no coming back. Many of these moves are one-way.
There’s more to it than a higher tax rate. Going faster carries real advantages — and a real cost that isn’t only about tax:
More years of tax-free growth. A smaller traditional balance later means smaller RMDs, less IRMAA and bracket pressure down the road — and potentially less left as a taxable inheritance under the 10-year rule.
It costs more in tax now — sometimes at higher marginal rates. And doing it well is genuinely more complex than a simple year-by-year conversion: moving parts and trade-offs you may never have dealt with before. That complexity is exactly why it has to be structured for your situation, not copied from someone else’s.
Whether an accelerated approach fits you is a numbers question — real advantages weighed against real complexity, for your situation. That’s worth exploring, starting with your own figures.
Send it to yourself to read later, or to share with your spouse. No pitch.
Check your inbox in the next minute or two.
Your Retirement Tax Exposure, free, in about 3 minutes.
Open the free calculator →