Somewhere between your last paycheck and your first required withdrawal sits a stretch of years most people never notice they had. By the time they notice, part of it is gone.
Here’s the shape of it. Your salary has stopped. Social Security hasn’t been claimed yet, or doesn’t have to be, and nothing has forced a distribution from your retirement accounts. For those few years, your taxable income is close to a choice. You, not a formula and not an employer, decide what your tax return says.
That choice is the asset. I call these the window years.
The Deal You Signed Decades Ago
Every pre-tax dollar you saved was a joint venture with the government: a deduction now, taxation later. Fair deal. But later has a start date. Beginning at age 73, or 75 if you were born in 1960 or later, required minimum distributions begin, and a formula, not your budget, sets the minimum income your tax return must show. (The ages come from the SECURE 2.0 Act. Congress has moved them before and can move them again.)
Forced income doesn’t care whether you needed the money. It stacks on top of Social Security and pension income. It can push you into brackets you thought you had retired from. Through the income-based Medicare surcharge, it can raise what you pay for Part B and Part D. It can pull more of your Social Security benefit into taxation. No penalty is involved. The design arrived on time.
The people surprised at 73 made no mistake. They saved hard, deferred every year, and never noticed the account had a partner all along.
Use It or Lose It, Every Year
Between the last paycheck and that start date, the design turns in your favor. Your bracket is lower than it was while you earned, and lower than it may be once the formula takes over. Each window year is one unit of low-bracket capacity.
Unused capacity doesn’t roll over. A ten-year window ignored for five years is half gone, at any income level. That’s what makes these years different from every other planning decision you’ll face in retirement: most decisions wait for you. This one expires on schedule, one year at a time.
What the Window Is For
Repositioning. Moving dollars from the always-taxed-later bucket to the never-taxed-again bucket, at rates you choose on purpose, instead of rates a formula chooses for you.
The mechanics have a name: a Roth conversion. But the mechanics are the easy part. Any custodian can process a conversion in an afternoon. Choosing the years, the amounts, and the sequence, and knowing when to stop, is the actual work. The window is the strategy.
The Guardrails
Raising this year’s income on purpose touches things that don’t announce themselves. Medicare premiums are set by a two-year lookback, so a conversion at 63 can show up as a surcharge at 65. Health-insurance subsidies before Medicare have cliff edges. Bracket lines and the taxation of Social Security benefits move with every added dollar.
So the move is measured, never maximal. The households I’ve seen get this right don’t convert as much as possible. We map the next several years of income first, then decide what each year can absorb.
Why Nobody Owns This for You
Your CPA sees the year that already happened. Your 401(k) provider sees the account, not the tax return. The window sits between two professions, and that gap is where it expires.
I keep meeting professionals, three of them this summer in my office, who did everything right for thirty years. Maxed the 401(k), deferred every dollar they could, seven figures saved, and almost all of it in the one bucket that gets taxed at whatever rates exist when they need the money. They didn’t make a mistake. They ran the accumulation playbook past the point where it stopped being the right playbook.
Count Your Window Years
Every year between your last paycheck and your required start date is capacity. Count them. If the count makes you uneasy, that’s worth acting on while the window is still open, not after the formula takes over.
Count them before they count themselves.
Book a 30-minute conversation · 213-456-8356 · jun.huang@innosightwealth.com
This article is education, not individual advice. Whether converting, how much, and in which years depends on your full picture. That diagnosis is the work.