26 Ways the GOP’s Tax Reform Will Affect Your Wallet

5. Deduction for State and Local Taxes

One of the most valuable tax deductions allowed for individuals — the write off for what you pay in state and local income, sales and property taxes —i s getting squeezed.

Starting in 2018, the new law sets a $10,000 limit on how much you can deduct of the state and local taxes you pay. A plan to limit the write-off to property taxes only was scrapped. You can deduct any combination of state and local income or sales taxes or residential property taxes, up to the $10,000 cap.

Don’t assume that you can beat this crackdown by prepaying 2018 taxes before December 31, 2017. Although a fourth quarter 2017 estimated state income tax bill due in January or a property tax bill due in January that covers 2017 can be paid in 2017 and deducted on your 2017 return without being subject to the new limit, Congressional tax writers specifically noted that prepaying 2018 taxes won’t earn a fatter deduction.

(Note this: Even under the new rules, property and sales taxes will remain deductible for taxpayers in a business or for-profit activity. For example, if you own a residential rental property, you can continue to fully deduct property taxes paid on that property on Schedule E.)