For most IRA Millionaires who come to our team with an existing Roth conversion plan already in motion, the plan itself isn’t the problem. The math looks reasonable. The mechanics are correct. The household is actually converting. But roughly 90% of those plans share the same quiet flaw — one that makes the entire strategy far less valuable than it should be, and often close to useless in achieving the outcome the household was actually after.
The mistake isn’t converting too little, starting too late, or picking the wrong tax bracket. It’s a step that happens before any of those choices. After more than 16 years of focused Roth conversion work and building plans for more than 3,000 IRA Millionaire families, our team has watched this single planning gap undermine otherwise good execution repeatedly. This article walks through what the mistake actually is, how to identify whether your current plan has it, and how to course-correct if you’re already several years in.
The Amazing Race: Task vs. Destination
If you’ve watched The Amazing Race, the reality show where teams travel to locations and complete tasks against the clock, the pattern the winning teams follow is instructive. The rushed teams hear the task and immediately sprint toward the nearest transport hub. They arrive fast — and then they get stuck. Three-hour layovers. Missed connections. Forty-minute bus rides to the right airport after choosing the wrong one.
The teams that consistently perform well pace themselves. They study the destination. They plan the actual route to it. And while the sprinters are stuck at the closest airport, the planners are on a direct flight.
Find Your Destination
Our team has helped more than 3,000 IRA Millionaire families define their real conversion destination — not just this year’s tax bill, but the specific lifetime tax outcome the plan is designed to reach. Find out what your destination number actually looks like, with no product pitch and no obligation.
Most Roth conversion plans work like the sprinting teams. They know their task — convert dollars from traditional to Roth. They know the general direction — reduce future taxes. So they rush off. They execute conversions year after year, and the household feels like it’s making progress, because the task is getting done.
But doing the task isn’t the same as arriving at the destination. If the plan doesn’t get you where you actually need to go, all the conversion activity in the world doesn’t produce the outcome you’re after.
The Europe Analogy: “Lower Taxes” Isn’t Specific Enough
The reason the destination step gets skipped is that it seems obvious. Everyone knows the goal — pay less tax. That’s like saying the destination is “Europe.” It’s directionally correct and practically useless.
There’s a huge difference between going to Italy and going to Norway. Both are Europe. Both are legitimate destinations. But packing for one and ending up at the other is a genuinely bad outcome. You don’t want to arrive in Norway with flip-flops and a bikini.
For a Roth conversion plan, “less tax” is the Europe answer. The specific destination is a dollar figure — the total lifetime tax bill the household is actually trying to reduce, and by how much. Without that specific number, every year’s conversion decision floats. Convert to the top of this year’s bracket? Convert a little more? Convert less because the ripple effects feel scary? The household has no anchor to judge whether any given year’s decision is actually moving them toward the outcome that matters.
The destination isn’t Europe. It’s a specific address.
How to Actually Define Your Destination
Defining the destination requires projecting the household’s traditional IRA forward from today through RMD age — currently 73, or 75 for later birth cohorts under SECURE 2.0 — and then beyond. The variables that matter:
- How much the traditional IRA balance is projected to grow between now and RMD age at a reasonable rate of return
- How much the IRS will force out annually once RMDs begin, using the current Uniform Lifetime Table and the projected balance at that age
- How that forced income stacks on top of Social Security, pension income, and any other retirement income streams
- What tax brackets and IRMAA thresholds each year of RMDs would land in for the married couple
- What those brackets and thresholds look like for the surviving spouse after the first passes, filing as a single taxpayer
- What tax the heirs would face on inherited traditional IRA balances under the SECURE Act 10-year rule
That total — the sum of tax the household plus the surviving spouse plus the heirs would pay if nothing changes — is the destination. It is the specific dollar figure the Roth conversion plan is designed to reduce.
For households who want a quick starting point on the projection, our team has built a free RMD calculator that shows the future RMD trajectory in about two minutes and gives directional numbers to work from.
A Real Case Study: The $7M IRA That Became an $11M Roth
To make the destination concept concrete, consider a client couple our team began working with four years ago. Names changed for privacy.
They came to us worried. They had recently learned about RMDs and quickly done the math on their own balance — approximately $7 million between them in traditional IRAs. At their age (65 at the time), reasonable growth would have taken that balance to roughly $10 million by RMD age. Once RMDs began at 73, the forced taxable income would have exceeded $400,000 in year one, growing year after year as both the balance and the RMD divisor factors climbed.
Four years later, the plan looks different.
| Starting Point (4 yrs ago) | Today | |
|---|---|---|
| Traditional IRA balance | ~$7M | Substantially reduced |
| Roth IRA balance | ~$0 | ~$11M (tax-free) |
| Projected first-year RMDs at age 73 | ~$400K+ | Sharply reduced |
| Tax funding source | Would have required IRA distributions | Paid from taxable brokerage account |
The taxes on the conversion sequence were paid from a taxable brokerage account on the side — which still has plenty of money in it. In fact, that brokerage account is now likely to be the household’s biggest source of ongoing tax cost through dividends, interest, and capital gains. That’s a very different problem than the one they were originally facing — and a substantially smaller one.
This is what a real destination looks like: not just “less tax,” but a specific structural change in where the household’s wealth lives and how it gets taxed for the rest of their lifetime. For more on the size of these transformations across real client plans, see our team’s analysis of strategic Roth conversions that save over $1 million in taxes.
Why One Projection Isn’t Enough
There’s a second, related mistake that shows up almost as often as the missing destination. Households — and often their advisors — build a plan against a single projection, usually the “married filing jointly for the next 25 years” scenario, and set it on autopilot. Same conversion amount each year. Same assumptions. No recalibration.
The problem is that a plan optimized for one scenario can look very different under other likely scenarios. Three in particular deserve their own projections:
- Married filing jointly, both spouses alive — the baseline scenario
- Surviving spouse filing single — after the first spouse passes, single-filer brackets and IRMAA thresholds hit at much lower income levels
- Heirs inheriting under the SECURE Act 10-year rule — often when the heirs themselves are in their highest-earning years or have already built their own tax plans, and a large inherited traditional IRA can undo the plans they’ve built
A plan that looks great under the joint-filing scenario can look meaningfully worse under the survivor-filing scenario. A plan that works well for the household can be a burden for the heirs. Running a single projection and committing to it is like going all-in on a mediocre poker hand. For more on the heirs question specifically, see our team’s analyses of the IRA inheritance tax trap and inherited Roth IRAs under the 10-year rule.
If You’re Already Behind: How to Course-Correct
Some households reach this article having already spent several years converting on autopilot. The natural instinct is panic conversion — dramatically accelerate to try to make up the gap. That instinct usually makes things worse, not better.
The better approach: take the conversions already done into account, project forward from where the household is now, and recalculate the destination. The number will be different from what it would have been four or five years ago. It will still be a real, specific destination — the total lifetime tax bill the remaining plan is designed to reduce.
From that revised destination, a fresh multi-year plan can be built. Sometimes the right answer is more aggressive conversions to catch up. Sometimes the right answer is a slower pace because the previous conversions did more damage than expected to the current-year picture. The plan follows the math from where the household stands today, not from where they wish they had been five years ago. For more on why multi-year sequencing beats single-year decisions, see our team’s analysis of multi-year Roth conversion strategies.
Common Mistakes to Avoid
Several errors compound the destination problem:
- Executing conversions without a destination number. The task feels productive. Without a lifetime target to measure against, “productive” isn’t the same as “on track.”
- Building the plan against one scenario. A single-scenario plan optimized for joint filing can leave the surviving spouse — and eventually the heirs — worse off than the baseline “do nothing” alternative.
- Setting and forgetting. Even a well-built plan drifts if it doesn’t get re-projected annually against current balances and current tax law.
- Panic-converting after realizing the plan is off track. Aggressive one-year moves rarely fix multi-year mistakes and can create their own current-year problems.
- Underestimating brokerage-account tax cost. Households whose conversion strategy shifts significant wealth into taxable brokerage accounts often discover that the brokerage account becomes the new tax problem.
For a broader look at the planning errors that derail conversion strategies, see 5 costly Roth conversion mistakes.
About Q3 Advisors
Q3 Advisors is a flat-fee fiduciary firm specializing in tax-efficient retirement planning for high-income professionals and retirees. As practitioners of Rothology® — the science of Roth conversion optimization — our team brings the multi-year destination modeling, multi-scenario projections, and annual recalibration that turn a Roth conversion from an unfocused task into a plan actually built around a specific lifetime tax outcome. We don’t sell financial products and we don’t manage investment accounts — we sit on top of what households already have and help them define, plan to, and actually reach their real destination. With more than 3,000 IRA Millionaire families served and over $10 billion in projected lifetime tax avoidance across more than 16 years, we have the track record to guide your strategy.
Frequently Asked Questions
What does “destination” mean in Roth conversion planning?
The specific total lifetime tax dollar figure the household is trying to reduce — the sum of taxes the household will pay, the surviving spouse will pay after the first spouse passes, and the heirs will pay under the SECURE Act 10-year rule on any remaining traditional IRA balances. Without that specific number, individual conversion decisions have no anchor.
How do I calculate my lifetime tax destination?
Project the traditional IRA balance forward to RMD age, apply the Uniform Lifetime Table to that projected balance, model the resulting taxable income stacking on top of Social Security and other retirement income, and estimate the tax over the remaining lifetime plus the surviving spouse’s period and the heir 10-year window. The specific dollar total is the destination number. A useful starting point is Q3’s free RMD calculator, which produces a directional projection in about two minutes.
What if I’ve already spent years converting without a destination?
The remedy isn’t panic conversion. Take the conversions already done into account, project forward from where you stand today, and recalculate the destination. The revised number becomes the new anchor for the remaining years of the plan. Sometimes the right answer from that revised point is a more aggressive pace; sometimes it’s a slower one. The plan follows the math from today, not from where the household wishes it had been five years ago.
Why isn’t a single-scenario projection good enough?
Because a plan optimized for one scenario — usually “married filing jointly for the next 25 years” — can look very different under other likely scenarios. The surviving spouse files single, at brackets and IRMAA thresholds that hit at much lower income levels. The heirs inherit under the 10-year rule, often during their highest-earning years. A plan that works under the joint scenario can leave the survivor or the heirs worse off than doing nothing at all.
Should I convert my entire IRA to a Roth to solve the RMD problem?
Almost never all at once. Full-balance one-year conversions typically push the household into the top federal brackets and trigger maximum IRMAA surcharges. Most optimized plans convert 60% to 95% of the traditional IRA over a four-to-ten-year sequence, with the exact pace determined by the destination math for that specific household.
Can I skip the destination calculation if my CPA is helping me?
Most CPAs are excellent at preparing accurate current-year returns and minimizing this year’s tax bill — but that is a different question than “what’s our specific lifetime tax destination and how do we get there?” The lifetime question requires multi-decade projections, multi-scenario modeling, and annual recalibration that sits outside the typical CPA’s scope of practice. The CPA remains essential for the annual work; the destination work usually requires a specialist.
Plan Your Roth Conversion Strategy Today!
The task of converting is easy. The destination — the specific lifetime tax outcome your plan is actually designed to reach — is the piece most plans skip. To find out what your household’s real destination looks like and whether your current plan is on track to reach it, schedule a consultation with our team and get a multi-year, multi-scenario projection built around your numbers.
