Retirement queston

[jIM_Ohio]

Another aspect (as Jim mentioned above) you are going to have to take into consideration is the minimum required distribution your Mom is going to have to take--Link to info on minimum required distribution The penalties are very stiff if you don't take the MRD, so it is better that your Mom gets the money than the IRS.
MRD Calculator. It looks like she will have to take out more than she really needs to start off .

As long as there is a plan for where to put the extra money- maybe the same mutual fund in a taxable account, maybe muni bonds. Maybe convert to a Roth.

If she converts to a Roth each year (to cap out current tax bracket) eventually the MRD goes away and all withdraws are tax free. Exactly when that point in time is, not sure.

I have the MRD calculated to be
12773.72
with these inputs
acct balance 350k
DOB January 1938
rate of return 4%

modifying inputs some
MRD 13207.55

inputs of
account balance 350k
DOB July 1937
return 7%

married filing jointly would have 15% tax bracket cap at $66100- meaning mother could convert excess RMD and even more to a Roth. After about 10 years there are no RMDs and all withdraws are tax free. This plan also has the money taxed at 15% or less- real low- so a reasonable plan.