Controlled group: 2 employers with their own 401(k) plans. No Profit Sharing. 401(k) coverage for 2017 fails.
Plan 1 is safe harbor match, covers only 1 HCE and a lot of NHCEs.
Plan 2 is not safe harbor, has no match, no PS, but covers 5 HCE owners and 1 NHCE, prior-year tested.
The plans fail ratio percent test (result is under 10%). The plans cannot be aggregated for coverage testing. Seem that plan 2 needs to open up coverage to some of the plan 1 NHCEs by providing QNECs to until enough NHCEs are above the safe harbor percent and then run ABT. That QNEC is based on the 2017 ADP for the NHCEs in plan 2.
The problem is that the NHCE in plan 2 did not defer in 2017, so the NHCE ADP for 2017 for plan 2 is 0% and thus the QNEC is 0%. Therefore, is there a reasonable argument that no action is needed for plan 2 to pass coverage for 2017?
Note: the NHCE ADP in 2016 was also zero.