Most people with retirement accounts are aware that they must take RMDs (required minimum distributions) each year after they turn 70½.
But if you have more than one IRA, your RMDs must be calculated separately for each IRA.
However, if you have multiple IRAs of the same type, you can aggregate your RMD amounts and take all or a portion of your RMD from one, some, or each of your IRAs of the same type.
Traditional, SEP and SIMPLE IRAs are all included for purposes of the aggregation rule.
*Beneficiaries:
If you are a regular IRA beneficiary, the aggregation rule is only applicable if the same type of IRA is inherited by the same beneficiary from the same decedent. You can’t include your own IRA with inherited IRAs (even if they are the same type) for purposes of the aggregation rule.
Source: www.irs.gov