PAYROLL AND SOCIAL SECURITY MC Contafiscal Servicios, has the full range of services related to payroll and social security, always complying with Mexican tax rules. Calculation weekly, biweekly or monthly payroll, including salaries, benefits, subsidies (as applicable). Calculation of lncome Tax, Social Security, Housing Fund and Local Taxes. Calculation of Settlements, Compensations, Withholdings, Bonus, Vacations and prorit sharing. Preparation of weekly, biweekly or monthly payrolls in accordance wíth the tax requirements. Payroll Dispersion. Determination of Payroll Tax. Preparation of Social Security and INFONAVIT capture lines monthly and bimonthly. Preparation of individual and collective contracts. We have the support of associate lawyers who are experts in labor matters to address any legal matter in this area.