The rumoured six-week stamp duty holiday extension could see up to 160,000 additional property transactions in England benefit from the tax saving, according to Rightmove.

The chancellor Rishi Sunak is said to be considering a limited extension through to mid-May to prevent thousands of homes sales from falling through, the Telegraph has reported.

“It is certainly the case that a lot of people would be caught in the completion trap if the holiday were to end when it is due to,” a source told the newspaper.

But a spokesperson for the Treasury said: “We do not comment on future tax policy outside of fiscal events.”

If a six-week stamp duty holiday extension is granted, Rightmove estimates that between 120,000 and 160,000 additional property transactions in England could benefit from the tax cut.

The portal says that if as many as 160,000 transactions made it past the deadline, then property purchasers could save around £1bn in total.

This is based on the number of property transactions that completed each month in England between September and December 2020, according to data from HMRC.

Currently, Rightmove estimates that around 100,000 buyers who agreed a purchase last year are set to lose out, if the deadline stays as 31st March.

Rightmove’s director of property data Tim Bannister said that due to the nature of the conveyancing process there will be edge cases still unable to complete in time, but a six-week extension to the stamp duty deadline would come as a welcome relief to many purchasers desperately trying to get their purchase through the logjam.

Bannister said: “We know the stamp duty holiday was intended as a temporary stimulus for the market, but the delays we’ve seen in the home-moving process have been through no fault of the buyers and sellers who agreed a sale last year and who are now desperately trying to get their deals over the line.

“The delays have been a result of the huge number trying to go through, along with the many challenges of the people involved in the process working from home.

“If there was a six-week extension it should give the majority of the sales from last year the chance to complete in time.”

One in five buyers who agreed a purchase in July have still not completed