Retirement tax questions

Yes, the insurance company will tell me the RMD early in 2020. I will continue to receive the monthly rider distribution and the withholding of federal and state income taxes will continue. Since the rider distribution is more than my estimate of the RMD's of all my IRA's, I won't have to touch my other IRA's.

I'd like to understand what happens when the contract value is zero and I continue to receive the same distribution under the rider. Also, will the RMD be calculated with the fair market value of the lifetime income rider. This amount will always be 5% of the protected payment base - which is a fixed amount.

I sent an Email to the insurance company. Hopefully, they'll get back to me.