Most people quote their marginal tax rate from the federal tax brackets. But your true marginal rate is the sum of several layers of taxes—federal, state, payroll, and sometimes even city. And your marginal rate can differ depending on whether the income is earned (salary or self-employment), passive (investments), or from a business.

Taylor Swift and Travis Kelce happily announced their engagement this week. If you are also considering a walk down the aisle, read on to learn how getting hitched can result in big changes in your tax return.