Tax brackets are different for each filing status, so your income may no longer be taxed at the same rate as when you were single. When you are married and file a joint return, your income is combined — which, in turn, may bump one or both of you into a higher tax bracket.

Do you pay less taxes if you file jointly?

You may get a lower tax rate.

In most cases, a married couple will come out ahead by filing jointly. "You typically get lower tax rates when married filing jointly, and you have to file jointly to claim some tax benefits," says Lisa Greene-Lewis, a CPA and tax expert for TurboTax.

Do you get a bigger tax refund if you file jointly?

For married couples, filing jointly as opposed to separately often means getting a bigger tax refund or having a lower tax liability. Your standard deduction is higher, and you may also qualify for other tax benefits that don't apply to the other filing statuses.