Joint assessment generally proves the most efficient although there are sometimes situations where separate or single treatment may be appropriate.
Under joint assessment they can earn €76,800 between them at the standard rate. This breaks down to a maximum of €45,400 to either and €27,400 to the other at the standard rate.
The married credit of €3,660 can be taken by either spouse. The PAYE credit of €1,830 is not transferable and must remain with the PAYE earner ( in this case the wife)