I am older than most of you, so I am staring at MRDs and SS payments as an income booster. Also, I don't believe I have been in a bracket less than 25% for years. It may get lower I suppose, but it more likely will get higher. So my conversions have to be done at 25% but I still think they will pay.
Somewhere on this board there is an eye opening analysis by a Wall Streeter named Maurice. If you can find it, I heartily recommend reading it.
His insight is that for an investor who follows a very tax efficient buy and hold methodology in his taxable acount and who will pay the conversion tax with non-IRA funds, the key comparison is what to do with that proforma conversion tax. Pay it, and do the conversion, or keep it invested. The assumptions are that ROR in all accounts is the same.
If one is less tax efficient in his taxable account, the bar for conversions is lower yet.
As I remember, his findings are that the conversion makes sense if FutureTaxRate>PresentTaxRate(1-FutureCapitalGainsRate). But look it up, and work through the rationale and the algebra. With the spredsheet I made, it is extremely unlikely to come out ahead if you convert at 25%, and your marginal rate should fall to 15%. However, if marginal ordinary rates should fall to 20%, capital gains rates of 20% would be a go, but any lower and it would be better to not convert. If one's marginal ordinary rate stayed at 25%, conversion wins as long as future capital gains rates are above 0%, which I think we can count on.
I have used marginal rates, but actually I believe that the analysis would need to be divided into tranches, or a blended rate created, since if a lot might be converted at 15% but the last bit at 25%, it is more a 15% conversion than a 25%.
Ha