By issuing Memo No. 162/2010, INPS has provided instructions for employers to use in making the reports for December 2010 or January and February 2011. One of the most important aspects is the importance placed on compensation variables. In other words, if events or facts take place during the month that imply changes to the taxable compensation (i.e., compensation for overtime hours worked), employers are allowed to consider these changes when fulfilling the obligation and paying the contributions in the month following the month affected by these factors, without prejudice to the need to assign the contributions to the period in which they have accrued (the “accrual basis").
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