richard1953 said:
Is putting it back into investments allowed, or does the IRS consider that cheating somehow
Reinvesting is completely allowed, Bill's instinct is the one that isn't, and there is one option Richard hasn't been told about that's worth knowing before December.
Taking them in order. Once a required minimum distribution has been taken and taxed, the money is ordinary money and you can do anything you like with it, including investing it in exactly the same funds inside a regular taxable brokerage account, which is what Carolyn described. What you cannot do is roll a required distribution into an IRA or convert it to a Roth. The required amount has to come out and stay out; only amounts above it are eligible for conversion, which is why people who want conversions do them in the years BEFORE required distributions start, as described in Roth conversions. Bill, that's your answer, and it's a common assumption.
The option worth knowing: a qualified charitable distribution. If you're at least 70 and a half, you can have your IRA custodian send money directly from the IRA to a qualifying charity. It counts toward your required distribution for the year, and it never appears as taxable income on your return, which is different and usually better than withdrawing and then donating, because it also keeps your income lower for things that watch it, including the Medicare surcharge two years later. There's an annual cap, currently a six-figure amount that's indexed each year, and the rules are specific: it has to go directly from the IRA to the charity, and it applies to IRAs rather than to workplace plans. If you already give to a church or a cause, this converts giving you're doing anyway into a smaller tax bill.
Two smaller points. Carolyn's withholding-from-the-distribution approach is a genuinely useful piece of housekeeping. And keeping the money invested rather than in savings is a question about your risk and your timeline, not a question with one right answer, since making your money last at 73 looks different from doing it at 63.
Whether a charitable distribution fits your return, and how much, is a conversation for your tax professional with your actual numbers in front of them. Mine is a general description of how the rules work, not a recommendation for your household.