An independent agent has said that the launch of OnTheMarket could add £1,000 to his monthly portal bills.

The agent, who has asked not to be named but whose identity we can verify, was not on Rightmove before OTM launched, but was on Zoopla.

He now says that he may need to quit Zoopla to join Rightmove.

He gave us these sums:

“Before OTM – I paid £400 for Zoopla, £0 for Rightmove = £400

“After OTM – I paid £350 for Zoopla and £400 for OTM = £750

“Now that OTM has hurt Zoopla, I may need to go to Rightmove = £1,400.”

The agent said that in his town, it is the corporates that are on Zoopla, whereas the large majority of independents are on Rightmove.

He said: “I don’t particularly want to join Rightmove, but my staff will not thank me if we are losing instructions.

“As far as leads are concerned, 90% of these come from within the town, so a sales board would do it.”

He said: “In my area, it is the corporate agents that are keeping Zoopla going.”

He said that a good immediate strategy to boost OTM would be for all its member agents to quit Rightmove.

He said: “All that has happened is that agents have killed David and not Goliath. In doing so, they have created a weak competitor that no one has yet heard of.

“I do feel that a very urgent new strategy is required to make OTM work, and to help the agents that it was supposed to.

“One urgent strategy required is for all OTM agents to come off Rightmove.

“The agents still on it have only their own very short-term interests in mind and should put their sincerity where their mouths are.”

Invited to comment, Ian Springett, CEO of OTM, said: “In deciding to join OnTheMarket.com, our agents overwhelmingly embraced the strategic opportunity to control their portal costs over the longer term.

“Indeed, most of our members have fixed their listing fees until 2020.

“Each member decided individually which ‘other portal’ to retain. It turns out that over 90% chose to retain the market leader and that Zoopla as the No. 2 portal has therefore experienced the most immediate impact.

“Having made a successful and disruptive entry to the market, our next objective is to overtake the No. 2 portal in terms of available UK residential listings and from that point continue to build a credible, sustainably low-cost alternative to Rightmove.”

Springett has also explained the strategy for building OTM’s inventory, by offering listings to some agents who have signed letters of intent but who are not yet paying.

He said: “Among the increasing number of agents who are happy to sign a letter of intent expressing their intention to join OnTheMarket.com when we secure the support of 7,500 offices, many are currently listing with only one of the two other major portals and are therefore eligible to list with OnTheMarket.com now, whilst we build to that figure of 7,500 supporting offices.

“Such agents in selected areas have been offered the opportunity to list immediately with OnTheMarket.com for a period when they sign a letter of intent.

“These agents will have the opportunity to convert to their choice of standard tariff at the end of that initial period.

“It is a reality that there are many estate and letting agents who have a ‘wait and see’ approach to joining OnTheMarket.com.

“It is equally a reality that the more agents who join, and the sooner they do so, the more powerful OnTheMarket.com will be in continuing to disrupt the duopoly and in providing an alternative search service for consumers and agents alike.”