Tax Cuts Are Coming. So Are the Fights About Paying for Them.

Cutting taxes isn’t hard. Paying for them is. Republicans are running into a math problem as they try to change longstanding tax preferences in their $1.5 trillion tax rewrite.

Trump Promises ‘No Change to Your 401(k)’ as Congress Considers a Contribution Cap

It is not clear whether Republicans will put a cap on tax-deferred contributions in their final version of the tax bill, but caps as low as $2,400 a year are being considered.