What is a Marriage Penalty?

The marriage penalty is the additional federal income tax burden that arises when a married couple's combined tax liability filing jointly exceeds what they would each owe as two single individuals with the same total income. This occurs because certain tax brackets, phase-outs, and credit thresholds do not fully double for joint filers at higher income levels. The One Big Beautiful Bill Act reduced the penalty for lower-income earners by establishing a permanent $31,500 standard deduction for married filers. Dual-income couples with similar earnings remain most exposed. Tax loss harvesting and Traditional 401k contributions can reduce AGI to minimize exposure.

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