Hey {{first_name | Mixtape Reader}},
Monday we separated useful alternative investments from expensive retirement cosplay. Today we are back to one of the highest-impact planning moves for Gen X: Roth conversions.
This is not flashy. It will not show up in a pitch deck. Nobody at a dinner party is going to lean in when you say, "I converted part of my traditional IRA to Roth during a low-income tax year."
But they should.
Because the window between your last paycheck and your first Required Minimum Distribution can be one of the most valuable tax planning opportunities of your entire life.
🎵 Vol. 3, Track 5: The Roth Conversion Window
The problem: the traditional 401k tax bomb
For decades, most workers were told to defer taxes. Put money into a traditional 401k, lower your taxable income today, let the money grow, and pay taxes later.
That advice worked well for a lot of people. But it created a new problem: large pre-tax balances that eventually have to come out.
Starting at age 73 under current law, Required Minimum Distributions force you to withdraw money from traditional IRAs and traditional 401ks. Those withdrawals are taxed as ordinary income. You do not get to skip them because the market is down. You do not get to delay them because you do not need the money.
The IRS waited patiently. Then it starts collecting.
A $1.5 million traditional IRA at age 73 could generate an RMD of roughly $55,000 in the first year. Add Social Security, pension income, dividends, interest, or part-time work, and suddenly you are in a higher bracket than you expected.
That is the tax bomb.
What a Roth conversion does
A Roth conversion moves money from a traditional IRA or 401k into a Roth IRA.
The converted amount is taxable in the year you convert it. After that, the money grows tax-free, qualified withdrawals are tax-free, and Roth IRAs have no RMDs for the original owner.
In other words, you choose to pay tax now to avoid potentially higher tax later.
This is not always the right move. But when it is right, it can be extremely powerful.
The golden window
The best conversion years often happen after you stop working but before RMDs and Social Security fully kick in.
Example:
You retire at 60.
You delay Social Security until 70.
RMDs start at 73.
Your taxable income from wages drops dramatically.
That gives you roughly 10 to 13 years where your income may be lower than it was during your career and lower than it will be after RMDs begin.
That is the window.
During those years, you can intentionally convert enough traditional money to fill low tax brackets. You are not trying to convert everything. You are trying to use empty bracket space.
A simple example
Married couple, both 62:
$1.2 million in traditional IRA/401k
$300,000 in taxable brokerage
$200,000 in Roth IRA
No wages
Delaying Social Security until 70
Living expenses: $85,000 per year
They could fund spending from cash and taxable brokerage while converting $40,000 to $70,000 per year from traditional to Roth, depending on brackets and deductions.
Yes, they pay taxes on the conversion now. But they are doing it while their income is low. That shrinks future RMDs, increases tax-free Roth money, and gives them more control later.
If they do nothing, the traditional account keeps growing, RMDs get larger, and Social Security taxation may rise. The tax bill does not disappear. It just waits.
Why this matters for Gen X now
You might be 45, 50, or 55 and thinking, "Great, I will deal with this when I retire."
That is how people miss it.
Roth conversion planning starts before retirement because the setup matters:
You need taxable brokerage or cash to live on while converting.
You need to know whether Roth, traditional, or a mix makes sense for new contributions.
You need to understand how big your pre-tax balance could become.
You need to coordinate with Social Security claiming, ACA subsidies, Medicare premiums, and RMDs.
This is not a one-year decision. It is a decade-long tax choreography.
The hidden traps
Trap 1: Converting too much in one year
A Roth conversion increases taxable income. Convert too much and you can push yourself into a higher bracket, trigger higher Medicare premiums later, reduce ACA subsidies, or make more of your Social Security taxable.
The goal is not "convert as much as possible." The goal is "convert the right amount at the right tax rate."
Trap 2: Ignoring ACA subsidies before Medicare
If you retire before 65 and buy health insurance through the ACA marketplace, your subsidies are based on income. Roth conversions increase income. A conversion that saves $5,000 in future taxes but costs $8,000 in lost health insurance subsidies is not a win.
For early retirees, health insurance planning and Roth conversion planning are joined at the hip.
Trap 3: Forgetting Medicare IRMAA
Once you are on Medicare, higher income can trigger Income-Related Monthly Adjustment Amounts, usually called IRMAA. That means higher Medicare Part B and Part D premiums.
IRMAA uses income from two years prior. A big conversion at 63 can affect Medicare premiums at 65. Again, not necessarily a dealbreaker, but you need to model it.
Trap 4: Paying conversion taxes from the IRA
Ideally, pay the tax bill with cash or taxable brokerage money, not from the IRA you are converting. If you withhold taxes from the conversion itself, less money gets into the Roth, and if you are under 59.5, the withheld amount may create penalties.
Cleanest version: convert the full amount, pay the tax from outside funds.
Trap 5: Assuming tax rates will stay the same
Current tax brackets are not guaranteed forever. Under current law, several individual tax provisions are scheduled to change after 2025 unless Congress acts. Future tax policy is unknowable, but that uncertainty is exactly why tax diversification matters.
Having traditional, Roth, taxable, and HSA money gives you flexibility. Flexibility is the antidote to tax law guessing.
The conversion decision framework
A Roth conversion is more attractive when:
Your current tax rate is lower than your expected future tax rate.
You have large traditional balances relative to Roth and taxable accounts.
You can pay the tax from outside funds.
You have several low-income years before RMDs.
You want to reduce future RMDs.
You want to leave tax-free assets to heirs.
A conversion is less attractive when:
You are already in a high bracket.
You need ACA subsidies and the conversion would wreck them.
You do not have outside cash to pay the taxes.
You expect to be in a much lower bracket later.
You may need the money soon and cannot let the Roth grow.
What about Roth 401k contributions now?
If you are still working, the Roth versus traditional question depends on your current bracket and future expectations.
A high earner in the 32 percent or 35 percent bracket may still prefer traditional contributions today, especially if they expect a lower bracket in retirement.
Someone in the 12 percent or 22 percent bracket may prefer Roth contributions, especially if they already have a lot of traditional money.
Many Gen X households should consider a split approach: enough traditional contributions to reduce current taxes, plus Roth IRA or Roth 401k contributions for future flexibility.
The goal is not purity. The goal is options.
The move this week
Check your current retirement account mix: traditional, Roth, taxable, HSA.
Estimate how large your traditional balance could be by age 73 if you keep contributing.
Look at your expected retirement gap years: after work, before Social Security, before RMDs.
Ask a tax planner or financial planner to model annual Roth conversions during those years.
If you are still working, review whether your current traditional versus Roth contribution mix gives you enough tax flexibility later.
Friday we are turning all of this into a retirement paycheck system. Not just how much you withdraw, but where the monthly cash actually comes from, how to refill the buckets, and how to avoid selling stocks during a bad market.
See you then.
The Mixtape Millionaire Team
Mixtape Millionaire is for informational purposes only and does not constitute financial advice. Always consult a qualified financial professional before making investment decisions.