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 tax a person pays normally and for calculating the extra Tax, PRSI and USC a person would pay if they were getting extra pay for overtime worked, or getting promotion for example. The figure for Tax Band and Tax Credit can be found on your Tax Credit Certificate. Please note that the USC calculation is based on taxable pay which may not always be equal to pay subject to USC. When this occurs the USC calculated by the calculator will be incorrect and you will notice a difference between this calculation and the calculation on your payslip.