Comment by NearAP

> has their own set of rules so most HR software doesn't bother calculating it -- you just figure it out manually and input it every year for every employee

Beg to disagree. This is the complexity that large ERP firms handle and why Oracle, SalesForce, etc are expensive to implement. They figure out the commonality (if any) and build for it. Then they add on features specific to countries they target and then they add the ability to configure for your own situation (to a certain level).

PeopleSoft did this for Payroll and workforce administration which is part of how they cornered the market for HCM.