Stated differently, the definition of compensation used for deferrals only has to be reasonable unless it's applying the default % under a QACA. As CuseFan pointed out, this may be an operational issue depending on how the plan defines compensation for deferral purposes. If the plan excludes bonuses for deferral purposes, then there is no operational error, even if the definition of comp for that purpose doesn't satisfy 414(s). Of course you must use a definition of compensation that satisfies 414(s) for ADP testing purposes, but that's a separate issue.