Tax Calculators for Married Couples
Filing jointly is confusing. We built simple calculators to help married couples get withholding right, decide between joint and separate filing, and understand how marriage affects your tax bill.
Two-Earner W-4 Withholding Calculator
When both spouses work, the default W-4 settings often under-withhold. This tool helps you avoid a tax-time surprise.
MFJ vs MFS Comparison
Should you file jointly or separately? Compare both scenarios side-by-side based on your situation.
Marriage Tax Penalty / Bonus
See whether being married helps or hurts your combined federal tax bill.
Combined Income Tax Estimator
Estimate your joint federal tax liability based on two incomes, deductions, and credits.
Guides
All guides →The Marriage Tax Penalty in 2026: Who Pays It and How Much
The federal brackets don't create a marriage penalty for most couples — but four other parts of the tax code do. Here's where the real penalty hides and how big it gets.
OBBBA Tax Changes for Married Couples: What's Different in 2025 and 2026
The One Big Beautiful Bill Act made several changes affecting joint filers. Here's a plain-English summary of the standard deduction bump, the Child Tax Credit increase, and what stayed the same.
The Two-Earner W-4 Trap: Why Most Couples Owe at Tax Time (and How to Fix It)
When both spouses work, the default W-4 settings almost always under-withhold. Here's why, and three ways to fix it for 2026.
W-4 Step 2(c) vs Step 4(c): Which Two-Earner Fix Is Right for You?
The IRS gives two-earner couples two ways to fix W-4 withholding. They produce different results, and the right one depends on how similar your incomes are.
Disclaimer: These calculators provide estimates based on simplified tax rules. They are for informational purposes only and are not a substitute for professional tax advice. Consult a CPA or enrolled agent for your specific situation.