WAZO daily wage calculation the UWV way, in seconds

For pregnancy, maternity, adoption and additional birth leave and for paid parental leave, the UWV pays a WAZO benefit, usually to the employer, who runs it through payroll. How high that benefit will be, the employer only hears afterwards, and the amount almost always differs from the gross wage and from the social insurance wage. Calculating it yourself in advance means looking up data from a full year of wage tax returns and doing a complicated calculation by hand.

An application in C# that carries out the UWV daily wage calculation step by step: the social insurance wage in the reference year, reduced by holiday allowance and gross personal budget paid out and increased by the reserved amounts, without incidental income reductions, divided by 261 days, indexed and capped at the maximum social insurance daily wage.

An integration with the Nmbrs API that retrieves all relevant wage tax returns of the employee at the push of a button, so nobody has to look up or retype data any more.

Every intermediate step of the calculation is visible, so the payroll administrator can explain the result to the employee and compare it with the UWV decision. The calculation rules were tested against real cases together with payroll experts and recorded in automated tests.