If I am in the 1% the violation would be spread over numerous years and so larger penalties.. Plus they will look at me harder since I didn't fix it before an audit. The custodian doesn't track the contribution deduction year just when the contribution is made for a sep ira. Tracking is down to me.
Interestingly I've been looking at the Charles Schwab Protoype (not 5305-IRA) SEP IRA and the adoption agreement has a specific option as follows:
This is an amendment and restatement of an existing Simplified Employee Pension plan (a Prior Plan).
The Prior Plan was initially effective on __________________________________________________________________.
The Effective Date of this amendment and restatement is _________________________________________________.
Note: The Effective Date is usually the first day of the Plan Year in which this Adoption Agreement is signed.
I am seriously considering transferring to Charles Schwab with their prototype SEP IRA and since my contribution was made in 2015 take the deduction for it in 2015 with the CS agreement effective on 1 January 2015 (first day of the plan year).
I'll make an equal employer prior year contribution to my solo401k to cover the $10k so my tax return/taxes remains the same.
The trustee to trustee transfer is not reportable, my 2014 tax shows a $18k deduction to a qualified plan within my limits and made within the time limits, my 2015 tax will show a $10k deduction to a sep/qualified plan with the IRS receiving a 5498 indicating a $10k contribution to a sep received in 2015. My 2015 Sep is now a prototype so will be valid to continue to contribute to if I so choose.
I think this will all work because 401(b) allows certain retroactive changes in plan within specific time periods. I believe I am still within the time limits - since the contribution was made in 2015 (and I believe the failure was triggered by contributing to the SEP IRA and 401k in 2015) this should be by 15 April 2016.
This would mean there is no plan document failure if remedied in time which means no disqualification of the plan and no need to correct anything. This has been useful - http://www.irs.gov/irb/2013-04_IRB/ar06.html . Specifically Part III Section 5.01.
I see here why this case is not shown in the SEP fix it kit since that only covers mainly "operational failures" and not one of the other three types of failure leading to disqualification of the retirement plan. This falls under "plan document failures" I believe.
Also :
.08 Generally, none of the correction programs are available to correct failures that can be corrected under the Code and related regulations. For example, as a general rule, a Plan Document Failure that is a disqualifying provision for which the remedial amendment period under § 401(b) has not expired can be corrected under provisions of the Code through retroactive remedial amendment.