Couples often joke that they're tying the knot for tax reasons - but they're now being reminded that they could really be in for a cash windfall after getting married.

If you're a newlywed, you could be entitled to money back from Revenue. Married couples pay tax differently to single people and if the tax you've paid is more than necessary, you can claim it back. Not everyone is aware of this, according to Taxback.com's Barry Flanagan. "In the year you’re married, both you and your spouse will continue to be treated as single people for tax purposes," he told The Irish Sun. "However, if the tax you pay as two single people is greater than the tax payable if you were taxed as a married couple, you can claim the difference as a tax refund. "Only tax deducted in the months after marriage can qualify for a tax refund, and refunds are typically granted the following year." This means that if you got married in 2017, you might want to check whether you're due a refund. Getting hitched isn't the only reason revenue might owe you money. Teachers, for example, are entitled to €518 in flat rate expenses per year. If they register with the Teaching Council, they are also entitled to additional tax relief on the €65 fee. Check out our full guide on reasons you might be able to claim money back here.