Whose Tax Plan Are You On: Yours or Uncle Sam’s?
Direct Answer: A Roth conversion moves money from a pre-tax retirement account into a Roth account, where it grows tax-free and is never subject to Required Minimum Distributions. You pay the tax now, at rates you can see, on a schedule you control. The window to do this is the period between retirement and the start of RMDs, often the early to mid-sixties. Once RMDs begin, your options narrow significantly. For most people with substantial pre-tax savings, the question is not whether a Roth conversion makes sense in theory. It is whether the window is still open.
There is a window in retirement planning that most people never see until it’s too late to use it.
It opens when you stop working. It closes when Required Minimum Distributions begin at 73 or 75, depending on when you were born. In between, something rare happens: for the first time in decades, you have real control over how much taxable income you recognize each year.
That window is where a Roth conversion strategy lives. And what you do with it, or whether you do anything at all, is one of the most consequential financial decisions most families will ever face.
Uncle Sam’s Plan or Yours
Here’s the simplest way I know to frame this.
When most of your retirement savings sits in pre-tax accounts, a 401(k) or traditional IRA, you have a tax partner. That partner is the federal government. They decide when you have to take money out. They decide how much you have to take out. They set the thresholds that determine how much of your Social Security gets taxed, thresholds frozen since 1984. They can change the brackets and adjust the rules whenever they want. And they have been waiting decades to collect.
I call it Uncle Sam’s Forced Liquidation Plan for your 401(k) and IRA money.
A Roth conversion is the act of firing that partner. You pay the tax now, at rates you can see, on a schedule you control, and you move the money into an account where the government’s claim on it is settled. No Required Minimum Distributions. No provisional income calculation pushing your Social Security into taxable territory. No forced withdrawals on their timetable.
Yours.
The question isn’t whether this is a good idea in theory. For most people with substantial pre-tax savings, it is. The question is whether you still have the window to do it.
The Conversation Nobody Wants to Have
When I sit down with clients to work through a Roth conversion analysis, I have to start somewhere most financial conversations avoid.
We have to talk about death.
You’re not getting out of here alive. None of us are. And if we’re going to build a plan that actually works, we have to be financial adults about it. I half-jokingly tell clients: if you can tell me when you’re going to die, I can create the plan of your lifetime. A known end date means a known time horizon, and that changes everything about the math.
We don’t know that. So we plan for a range.
What Happens at Both Ends of That Range
The longer you live, the more a Roth conversion pays off for you personally. Every year that converted money grows tax-free, every year you avoid a Required Minimum Distribution that would have pushed your Social Security into taxable territory or triggered a Medicare surcharge, is another year the math compounds in your favor.
The shorter you live, the less personal benefit you see from it. That’s straightforward, and I won’t pretend otherwise.
But here’s what changes the calculation entirely.
If you die early with a large pre-tax IRA, you’ve handed your kids a poison pill. A million dollars in a traditional IRA is not a million-dollar gift. It’s a million-dollar tax problem that lands on them at the worst moment of their lives, during their peak earning years, often taken all at once by heirs who don’t know any better. For a full breakdown of what that actually looks like, see You Just Inherited an IRA.
A Roth conversion turns that poison pill into a real gift. A Roth IRA passes to your children with no income tax attached. Under current rules, they have ten years to withdraw it, but they can let it grow tax-free for the entire decade and take it all out at the end without owing a dollar of income tax on any of it. The money you converted, and everything it grew into, arrives intact.
So even if you die earlier than expected, your kids win. That’s the ace in the hole most people don’t know they have.
The IRMAA Trade-Off
Roth conversions aren’t painless, and I won’t pretend they are.
During the conversion years, when you’re deliberately pulling money out of pre-tax accounts and recognizing it as income, your taxable income goes up. That can push you over Medicare premium thresholds and trigger surcharges that add real money to your Part B and D costs each month. Per person. For the full year, not prorated.
Nobody likes that. I understand it.
But here’s the question I ask clients. Would you be willing to pay a few thousand dollars more a year in Medicare premiums for several years if the result was saving hundreds of thousands of dollars in taxes over the rest of your retirement, and potentially hundreds of thousands more for your kids?
When we put those numbers side by side, the trade-off is rarely close. A few years of elevated premiums against a lifetime of tax-free income and a clean inheritance is not a difficult comparison. It only feels painful in isolation, when you see the cost without seeing what it buys.
The Widow’s Penalty Connection
Here’s an angle almost nobody addresses when they talk about Roth conversions, and it may be the most important one for married couples.
Think back to the widow’s tax trap. When one spouse dies, the survivor loses the lesser of the two Social Security checks. They file single, with brackets half as wide. And the Required Minimum Distributions keep coming, unchanged, into a tax situation that just got dramatically worse.
Now think about what happens if those RMDs don’t exist, because the pre-tax money was converted to Roth during the window years.
The survivor still loses the smaller Social Security check. There’s no way around that. But without RMDs stacking on top of a narrower bracket, the tax bill doesn’t go up. It often goes down. The widow’s penalty, one of the most financially brutal moments in retirement, becomes manageable instead of catastrophic.
That’s not a theoretical benefit. It’s a direct connection between a decision made in your sixties and what your husband or wife faces on the worst day of their life.
The Rule They Keep Getting Wrong
There’s a rule of thumb you’ve probably heard: never take money from your IRA or 401(k) to pay your Roth conversion taxes. Use outside money instead, cash, a brokerage account, anything already taxed.
If you have outside money available, that guidance is correct. Using already-taxed dollars to cover the conversion tax preserves more of the pre-tax balance inside the Roth and maximizes the long-term benefit.
But here’s what the rule leaves out. If you don’t have significant outside assets, waiting until you do, or not converting at all, isn’t automatically the better path. There can still be a meaningful benefit to converting even when the tax comes partially from the converted amount. The right answer depends on running the actual numbers, because the break-even point is different for every situation. The rule of thumb was built for a generic client. You are not a generic client.
The Cows Are Out of the Barn
Here’s the straight version of what I tell people who have spent twenty or thirty years building pre-tax savings and are only now asking about this.
The cows are out of the barn. Getting them back in takes time, effort, and money. It isn’t elegant or painless. But it’s doable. A proper Roth conversion analysis looks at dozens of variables: your age, your spouse’s age, your income sources, your state’s tax treatment, Medicare premium trajectories, projected RMD amounts, likely inheritance scenarios, and more. Nobody can predict the future. But we can model several realistic futures and find out which decisions hold up across all of them.
Some people don’t want to do that work. They’d rather not look at the barn. That’s a choice, and I respect it.
It just means they’re on Uncle Sam’s tax plan instead of their own.
Whose plan do you think is better?
If you’d like to find out whether you still have a window, and what a Roth conversion strategy might actually mean for your specific numbers, that’s exactly what a Retirement Income Blueprint call is for. Fifteen to thirty minutes, no cost, no obligation.
This post is part of the Retirement Tax Avalanche series. Each post covers one force in the chain. The full picture is in the links below.
But a Roth conversion strategy can only be built on the assets your planner actually knows about. See What You Tell Your Mortgage Broker That You Won’t Tell Your Financial Planner for why that gap matters more than most people realize.
The Retirement Tax Avalanche: All Six Forces
Frequently Asked Questions
A Roth conversion is the process of moving money from a traditional IRA or 401(k) into a Roth IRA. You pay income tax on the amount converted in the year you do it. After that, the money grows tax-free, is never subject to Required Minimum Distributions, and can be withdrawn in retirement without owing income tax. The conversion settles the government’s claim on that money permanently.
The most valuable window is the period between retirement and the start of Required Minimum Distributions, typically the early to mid-sixties. During those years, earned income has stopped, Social Security may not have started yet, and RMDs have not begun, so your taxable income is often at its lowest point in decades. Converting during that window means paying tax at manageable rates before the government starts forcing withdrawals on its own schedule.
It can. The income recognized during a conversion year counts toward the calculation that determines your Medicare Part B and Part D premiums. If the conversion pushes your income over an IRMAA threshold, your premiums increase for the following year. The right question is not whether the surcharge happens, it is whether the long-term tax savings justify the short-term premium cost. For most people doing a multi-year conversion strategy, the math favors converting even with elevated premiums during those years.
If you have outside taxable assets available, using those to pay the conversion taxes is almost always better. It preserves more money inside the Roth and maximizes the long-term benefit. But if you do not have significant outside assets, that does not automatically mean you should skip the conversion. There can still be meaningful benefit to converting even when the tax comes partially from the converted amount. The right answer depends on running your specific numbers, not a generic rule of thumb.
When one spouse dies, the survivor files as a single taxpayer with brackets roughly half as wide, while Required Minimum Distributions continue at the same level. That combination often means lower income taxed at higher rates. If pre-tax accounts were converted to Roth during the window years, those RMDs no longer exist, which removes a large piece of the income that would otherwise be pushing the survivor into higher brackets. For a full explanation of the tax situation a surviving spouse faces, see The Widow’s Tax Trap.
An inherited Roth IRA is still subject to the ten-year rule, meaning heirs must empty the account within ten years of the original owner’s death. But qualified distributions from a Roth come out tax-free. Your children can let the account grow for the full decade and take everything out in year ten without owing a dollar of income tax. That is a fundamentally different outcome than inheriting a traditional IRA of the same size. For more on what heirs face with pre-tax inherited accounts, see You Just Inherited an IRA.
About Kurt H. Jackson
Experience: Kurt H. Jackson has spent more than 16 years working directly with retirees and pre-retirees in Missouri, Nebraska, Kansas, Iowa, and Florida. After the dot-com crash in 2003, he started reverse-engineering the traditional save-and-withdraw model, and what he found changed everything about how he approaches retirement income. Before founding KJ Financial, he spent 20+ years as a Certified Mortgage Planner working with more than 1,000 clients.
Expertise: Kurt is a Retirement Lifestyle Architect and the creator of the Lifestyle-First Retirement Income Planning framework. He is Life and Health Insurance Licensed in MO (8035802), NE, KS, IA (NPN 14954049), and FL (W192044). His practice focuses exclusively on insurance-based, tax-optimized retirement income strategies including Protected Lifetime Income (PLI) design, Roth conversion planning, and the Tax Avalanche. He does not manage investments or sell securities.
Authoritativeness: Kurt founded KJ Financial and operates MaxMyRetirementIncome.com as a dedicated educational resource for retirees. His Lifestyle-First framework is built on peer-reviewed research from Wade Pfau, Morningstar, BlackRock, and EBRI. Every income figure published on this site is based on actual carrier quotes and current research, updated regularly.
Trustworthiness: KJ Financial is a compliance-first firm. All income figures are presented as illustrative and hypothetical. Kurt H. Jackson is not a securities broker, registered investment advisor, or CPA. Guarantees rely on the claims-paying ability of the issuing insurance company.
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Educational only. Not tax, legal, or individualized investment advice. Tax rules are complex and change often, and every situation is different. Please work with a qualified tax professional before taking any action.