[zoolily]

Being married doesn't necessarily increase your income tax in the US. Some couples pay more, while others pay less, depending on how incomes differ between the two spouses both in amounts and in kind. Being married does give you more options--a good tax preparer will have their software compute both the taxes for filing jointly and for filing separately.

[dmitrygr]

If you both make over 400k, no matter how you file, you pay more if married. Go look at brackets. Most people don’t know it. But “married filing separately” brackets are LOWER than “single”