I am considering installing a cross-tested Money Purchase Pension Plan for a small employer (an "older" owner and 3 "younger" ees). Plan will have an end-of-year employment requirement, so that contribution is not "accrued" until last day of PY. Plan will initially have a contribution formula of 25% to owner and 8% to ees. Anticipate that the contribution formula may need to be amended "occasionally", depending on revenue and/or changes in ees for a particular PY. Although other threads have indicated that the IRS does not "like" frequent changes to a MPPP contribution formula, is there any statutory prohibition against same? Has anyone had any actual experience with the IRS in this regard?