Reverse Rollover with a Basis

[Philimd]

I have an IRA  (IRA #1) of about $150,000 that was rolled over from a former employer plan.  It is all pretax.

I have a second IRA (IRA #2) of about $100,000 that has a post tax basis of $50,000 (after tax contributions that I made).

I have a SEP-IRA of $12,000 (all pre tax)

I want to reverse rollover these accounts to a current employer 403b.  The plan allows this.

I have filled out form 8606 over the years.

Can I do the following without any problems/flags:

1) First, reverse rollover the entire $150,000 from IRA #1

2)  Second, roll over the SEP-IRA

3) After that, roll over $50,000 (the pre tax earnings) of IRA number 2?

4) After that, do a backdoor roth conversion of the remaining post tax basis (50K) from IRA #2.  I will have no other IRA's that will trigger the pro rata rule.

If I do it this way I am assuming that there should be no immediate tax consequences.

[dmertz · Accepted solution]

Correct.  With a zero year-end balance in traditional IRAs, the $50,000 Roth conversion will consist entirely of your $50,000 of basis in nondeductible traditional IRA contributions.

[Philimd]

Does this have to be done at year end?    

Does the pro-rata rule apply at the time of the Roth Conversion or only at the end of the year?  If I do the reverse roll overs now, wouldn't my pre-tax amount be zero at that time, so I could do the conversion then?