President Donald Trump ’s ‘big beautiful bill’ delivers a temporary higher limit on the federal deduction for state and local taxes, known as SALT. But the phaseout, or income-based benefit reduction, could trigger a tax surprise for some higher earners, experts say.

The One Big Beautiful Bill Act is temporarily quadrupling the state and local tax deduction to at least $40,000, up from $10,000, for the next five years. Now it’s up to taxpayers to see if they can take advantage of this extra write-off, which is popularly referred to as the SALT deduction.

The new GOP tax law quadruples how much people can deduct in state and local taxes off their federal returns, offering significant relief to high earners in many Democratic-led states by partially undoing a big change in President Donald Trump’s 2017 law.