Employee and assimilated income is included in the formation of IRPEF taxable income according to the cash basis.
However, Article 51, first paragraph, of the TUIR states that “sums and values in general paid by employers by the 12th day of January of the following tax period are also considered to have been received in the tax period” (even if the latter deadline falls on a non-working day since it is not a statute of limitations as clarified by Revenue Agency Circular No. 2, para. 8, 15.1.2003).