Sorry, I'm not putting more equities in taxable right now, perhaps I was not clear that I'm happy with my allocations now, but may shift later, gradually.
If you are happy with your allocations, then I'm very confused as to why you started this thread.
You are happy with your overall allocations between equities and FI? Or you are happy with your overall percentage allocations between Roth, tIRA, and taxable? Or both? And how does insisting on having half of your Roth be cash enter into this?
Because the reality is that, if you want to keep a certain equities/FI allocation, then putting cash into Roth means that you are putting more equities elsewhere.
Yes cash or MM (or anything) is better in Roth vs. taxable from a taxable standpoint, earnings don't count towards income at all, not for IRMAA or anything (so far, unless changes happen). (EDIT of course there's never an absolute, sometimes taxable is better for deductions on some incomes)
Again, I am confused. Are you under the impression that capital gains and dividends in your taxable accounts don't count towards income and IRMAA? That is incorrect. And if you are keeping your overall asset allocation (equities v. FI) the same and if you are putting more cash (which generally earns the least) in the Roth and more equities (the asset class that generally earns more) into your taxable, you probably will be increasing your taxable income with this decision. And that will count towards your tax bracket and IRMAA. And, meanwhile, if your tIRA is growing faster because you want to put the cash in the Roth, then your RMDs will be higher, which could impact your tax bracket and IRMAA. (I don't know, though, because you are using percentages and not raw numbers.)
I can convert now to Roth at lower tax rates than in RMD years. At least in my projections currently. Tax smoothing.
Yes, but that would be true - perhaps even more true - if you were to include more equities and less cash in the Roth.
I'm using the conversions for income should I need it. You never know.
My income is a single SS. My furnance goes? My Car? Yep things happen.
I'm a single retiree and understand the challenges. But, that's why I wouldn't be putting my lowest generating asset class into the Roth. I fully expect to tap my Roth when I replace my car. If the market is down, I will sell equities in the Roth, withdraw the money, and buy the car. Then I will use the cash/MM in my traditional to buy the same amount of equities in my traditional to keep my asset allocation the same. As a result, I wouldn't really be selling off equities in a bad market and there would be no tax consequences. Heck, I might even use some of the cash in my traditional to buy a little more equities in the traditional if the market is crashing; I would be buying low and rebalancing my asset allocation at the same time.
At the beginning of your thread, you specifically asked this:
I've read that slower growing funds in TIRA and more growth funds in Roth are recommended at this stage.
But how do I get there?
The answer to that question pretty clearly isn't to insist on keeping all that cash in your Roth.
Since you seem absolutely committed to keeping so much cash in your Roth and not in equities, then the answer may simply be that you do not "get there." People make decisions all the time for psychological comfort rather than for better financial outcomes. There are people who will pay off a mortgage earlier even though their mortgage rate is very low and they believe that they are very likely to get a better net return by investing that money elsewhere. A friend of mine did this because he just wanted the feeling of having the house paid off.
Maybe the financial answers people are giving you aren't really relevant because what is most important to you, for whatever reason, is that you keep the cash in the Roth, not that you make the most money overall or that you reduce taxes or IRMAA payments.