This calculator is for anyone who wants to calculate their normal weekly, fortnightly or monthly Take Home Pay. It applies to anyone on a Week 1/Month 1 basis or anyone on a cumulative tax basis that have no changes to their tax situation since their last paydate. This calculator is also very useful for calculating how much extra Tax, PRSI and USC a person would pay if they were getting €600 extra for overtime worked for example. The figure for Tax Band and Tax Credit can be found on your Tax Credit Certificate.