2021
Module for calculating Withholdings
Single Module v 1.04 (794 KB - zip )
It includes the modification of Royal Decree 899/2021, of October 19, which modifies the Personal Income Tax Regulations.
Technical Information
Algorithm for calculating the rate of withholding on personal income tax for income from personal work Personal income tax 2021 (until October 20, 2021) (777 KB - pdf )
Specifications for the computer development of the personal income tax withholding calculation algorithm 2021
Algorithm for calculating the rate of withholding on personal income tax for income from personal work Personal income tax 2021 (as of October 21, 2021) (212 KB - pdf )
Specifications for the computer development of the personal income tax withholding calculation algorithm 2021