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What is an A-B trust?

Quick Answer

An A-B trust splits a married couple's estate at the first spouse's death into two trusts: the marital "A" trust (uses unlimited marital deduction) and the bypass "B" trust (uses the deceased spouse's estate exemption).

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Warren Team
Updated November 11, 2025
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The information provided is for educational purposes only and should not be considered as personalized financial advice. Warren is a registered investment advisor. Past performance does not guarantee future results. Please consult with a qualified financial advisor before making investment decisions.

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