Re: is it worth switching my tax benifits now we're married?
Ok, you (and your wife) have two things to consider in determining your tax liabilities.
The first is your tax credits. These are set amounts that are deducted from your final tax bill (provided you've enough tax to cover them). Everyone gets an individual tax credit of €1,830 and, if you are in PAYE employment, an employee tax credit of €1,830. The personal tax credit is transferrable and the PAYE credit is not. So, your wife could transfer €1,830 of her tax credits to you but this would increase her annual tax by that amount (and decrease yours by the same amount) so there'd be no net benefit.
The second thing to consider is your standard rate band. This is the amount of income you can earn before you hit the higher rate of tax (41%). An individual has a standard rate cut off point of €36,400. However, a married couple can transfer their standard rate band (to the point that one spouse has a standard rate band of up to €45,400). So, your wife could transfer €9,000 of her lower rate band to you, thus reducing your tax bill by €1,890 and, provided her income was less than €27,900, this wouldn't increase her tax bill.