Guidance for companies on President Donald Trump's payroll tax deferral directive is being held up by White House dissatisfaction with the rules drafted by the Treasury Department and Internal Revenue Service (IRS), according to three people familiar with the matter.

The White House wants employers—not employees—to be responsible for paying back the Social Security levies when they come due next year, one of the people said. Under current law the IRS can seek to collect unpaid payroll taxes from both employers and employees.

The division between the White House and the tax lawyers at the IRS and Treasury has meant businesses have waited for nearly three weeks for guidelines that would implement Trump's directive when it's set to begin this week, according to the people, who asked not to be named because the discussions are private.