Choose a state-specific marriage calculator to compare two single-filer tax estimates against a joint return model before you update withholding or year-end planning.
Use the state selector to open the marriage calculator that matches the tax environment you want to review, then compare two single-filer estimates against a joint return model.
A marriage tax calculator estimates whether the combined tax result looks more like a marriage bonus or a marriage penalty. It does that by comparing modeled taxes as two single filers with modeled taxes on a joint return.
The result can move materially when incomes are very similar, very different, or when additional income is attached to only one spouse.
Use it when you are getting married, checking whether joint withholding needs to be updated, or trying to understand why married filing jointly may look better or worse than expected in a state-specific tax setting.
It is also useful for budget planning when one spouse is considering a new salary, bonus, or side-income change.
Browse every state and territory marriage calculator below to open the dedicated 2026 planning page with local tax context and joint-versus-separate comparison notes.
The calculators on this website are provided by HyprDev LLC and are designed to provide general guidance and estimates. These calculators should not be relied upon for accuracy, such as to calculate exact taxes, payroll or other financial data. Neither these calculators nor the providers and affiliates thereof are providing tax or legal advice. You should refer to a professional adviser or accountant regarding any specific requirements or concerns.
