Landlords taking the government to court over the so-called “tenant tax” will have their hearing early in October.
The buy-to-let landlords are seeking a judicial review over the government’s changes to tax relief.
They have sought to challenge former chancellor George Osborne’s decision to restrict the amount of tax relief a landlord will be able to claim on mortgage interest to the basic rate; changes outlined in last year’s summer Budget.
A hearing will take place at the Royal Courts of Justice on Thursday 6 October, later than expected.
In a statement the campaign group Axe the Tenant Tax said HM Revenue and Customs had requested more time so their lawyers would be available.
It said: “We have been told not to read anything negative into the delay to our court date - it is quite a normal occurrence and, if anything, the extra time allocated we hope will work in our favour.”
The campaign is being led by Steve Bolton, founder and chairman of Platinum Property Partners, and fellow landlord Chris Cooper.
It has been crowdfunded by landlords who have managed to raise more than £101,000.
The pair have hired Omnia Strategy LLP, which was founded by Cherie Blair in 2011, to act for them.
Unless the legal challenge is successful, the government’s proposal will come into effect in April 2017.