Lots to comment on here.
- RMDs now begin at age 73, giving an extra "golden year".
- Several states give capped exclusions for retirement income including conversions; this is a consideration in deciding whether to exhaust the Trad IRA (via conversions) or spread out conversions & withdrawals past age 73 to benefit from lower (state) taxes.
https://rpea.org/resources/retirement-information/pension-tax-by-state/(See, e.g. Arkansas and Colorado; there are others.)
- Couples are often (usually?) not the same age. So a couple may be assessed a single IRMAA surcharge (if only one person is on Medicare) while still getting the benefit of broader (couple) tax brackets. This effectively halves the impact of IRMAA.
For example, in the first IRMAA bracket, a couple (same age) would pay $1874 more, while being able to increase income by $52K before crossing into the next bracket. That's an effective surcharge rate of 1874/52,000 = 3.6%.
Similarly, a single would pay half as much IRMAA, while being able to add only half as much income before reaching the next IRMAA level, so the single would also have an effective surcharge rate of 3.6%. But a couple with one IRMAA would pay just $1874 more while being able to add $52K of income, for an effective surcharge rate half as much, "just" 1.8%.
- RMDs aren't necessarily subject to tax. They can be used for QCDs. If the T-IRA balance is low enough that RMD does not exceed cash needs plus intended charitable contributions, there is less value in converting more (especially if the additional amount pushes income into a higher tax bracket).
- Cash flow is a limiting factor, though the broader constraint is the amount of cash available, regardless of whether it comes from income or taxable account assets. The object of the game, so to speak, is to move everything into tax-sheltered accounts.
Once taxable assets are consumed, there is less value in doing further conversions.
Optimizing a Roth Conversion probably means converting as much as possible because the IRMAA decreases above $750,000 and the federal tax rates increase by small increments above $340,100It is true that taking a big IRMAA hit one year is better than taking smaller IRMAA hits in multiple
years, all else being equal. The problem is that converting more in higher brackets can subject that conversion income to taxes (aside from IRMAA) that are much higher than they would be if spread out over multiple
years.
It may be better to convert a little bit each year even before the "golden
years", and then increase the conversion amounts as income drops in retirement. This is especially true if one is comparing small conversions at one's working year tax rate with a one-time conversion getting taxed at an even higher rate.
IOW, it can be rather painful to take a one-time hit in a 32%-37% bracket, especially compared with paying taxes at 22%-24% for several
years of conversions (whether while working or in retirement).
Municipal Bond Outlook The time between retirement and taking Required Minimum Distributions (Age 72) is often called the "Golden Years" because income for retirees is lower than in the future. Deferring Social Security increases this effect. Federal Taxes cuts in 2017 are set to expire in 2026 which means taxes are likely to be a little higher in the future increasing the benefit of a Roth Conversion.
Below are the Income Adjustments (2023) based on the Modified Adjusted Income including tax exempt income for Medicare known as IRMAA. Couple is calculated on an annual basis. Note that if one's MAGI crosses the $194,000 threshold, IRMAA for a couple goes up by $1,874 for a couple for that year. Crossing the $306,000 and $366,000 thresholds increases a couple's IRMAA by $5,669 for the year.
Part B Part D
Individual Individual Couple Incremental
0 $164.90 $ 0.00 $ 3,958
194,000 $230.80 $12.20 $ 5,832 $1,874
246,000 $329.80 $31.50 $ 8,671 $2,839
306,000 $428.60 $50.70 $11,503 $2,832
366,000 $527.50 $70.00 $14,340 $2,837
750,000 $560.50 $76.40 $15,286 $ 946
Below are the Federal Tax thresholds (2023). There is a jump from 24% to 32% by crossing the $340,100 threshold.
Lower Upper Marginal
$ 0 $ 20,550 10%
$ 20,550 $ 83,550 12%
$ 83,550 $178,150 22%
$178,150 $340,100 24%
$340,100 $431,900 32%
$431,900 $647,850 35%
$647,850 + 37%
Optimizing a Roth Conversion probably means converting as much as possible because the IRMAA decreases above $750,000 and the federal tax rates increase by small increments above $340,100. However, when you take into account the additional taxes that have to be paid for both Federal Taxes and IRMAA it becomes more of a cash flow constraint. As a recent retiree, I have three years before Federal Tax rates sunset, and four years until reaching 72. This three-to-four-year window is the optimum time to do Roth Conversions. Using municipal bonds, tax-efficient accounts, tax loss harvesting, and deferring Social Security are useful methods for targeting Federal and Medicare thresholds.
Municipal Bond Outlook The generally low IG muni yields with my lower marginal tax rate is why for several
years, my only muni investments have been in high yield, and only when they're good buys with a fresh spot of momentum. (And after a good run slows/stops, it's good-bye.)
Thanks for the clarification of your situation,
@lynnbolin2021. Of course all of us have individual situations that can make any specific investment a go or no-go.
Rupal Bhansali is leaving Ariel to launch her own firm 3
years old:

MOVEit Data Transfer Breach I've used Symantec VIP to access Fidelity via my desktop computer for several years.
I haven't experienced any issues with this two-factor authentication app.
Note: I never access personal financial accounts via any mobile devices.
Wealthtrack - Weekly Investment Show With all due respect to Romick, his clients made a lot less than other allocation funds in the last 10
years because Romick was too cautious and used a high % in cash.
PRWCX,FBALX and even rigid and conservative Wellington had a higher performance.
See 10 year chart(
https://schrts.co/BTmdEvwt)
In 03/2020, a black swan event, FPACX wasn't great either. It lost a similar or more % and was slower to recover (
https://schrts.co/pRegXfdG).
FPACX/Romick charges a higher ER>1% than many other funds in this category.
What is the highest percentage you’d ever allocate to a single stock? A real story: in 2000, 2 retirees from GE and Lucent came to work on my team just for another 3-4
years.
Both invested all/most of their money in their company stocks. The GE guy had about $360K in GE stock and the Lucent guy had about $300K. The market started going down and they started losing a lot of money, I begged them to sell but they didn't.
The GE kept saying that GE is diversified and the other guy couldn't believe it will go longer.
The Lucent guy lost everything. The GE guy lost a lot too. 10
years later they still worked and postponed their retirement. GE lost about 60% from 2000 to 2010(
https://schrts.co/HEVxxEdE)
What is the highest percentage you’d ever allocate to a single stock? With my previous employer (a big box retailer) from whom I retired last year after 35
years, due to a 15% employer match and rapid appreciation its stock alone escalated to 25% of my portfolio. Have whittled that down to
@10% after using proceeds for mortgage down payment and charitable gifting. No hurry to reduce further as company pays a dividend and is stable.