Revenue in the first half rose 10% to £131.1m, with underlying operating profit up 11% to £101m - an operating profit margin of 77%.
The interim dividend rose 14% to 25p.
Rightmove shares rose 1.1% in early trading.
Rightmove was set up in 2000 by four big estate agency chains, and quickly established a dominant position in online property search, making its website a must-see destination for buyers.
The group makes its money by charging agents to appear on the site.
Rightmove says a decade or so ago, agents typically spent around £2,500 per office per month on print media. Although agents' overall advertising budget is lower these days, Rightmove has consistently eaten into print media's share of advertising revenue, and now generates revenues per agent of £987 a month.
Rightmove charges on a per office basis, and as long as the agent's in business, it's an expense that can't be spared. That's allowed Rightmove to hike prices for years.
Unfortunately there may be early signs of cracks in the foundations. A flagging property market means estate agents are increasingly under pressure. A recent study found that 150 estate agents went bust last year, and up to 7,000 are at risk of going to the wall.
With end customers struggling, forcing through new price rises could be difficult. As a result Rightmove's looking to diversify the range of services it offers - especially with tools to help estate agents become more efficient.
For all that the business is very high quality. Capital requirements are low operating profit margins are over 75% and it has a proven strategy for growing sales, profits and returns to shareholders. The prospective yield is 1.3%, but, all being well, that's' expected to grow in the years ahead. Remember there's no guarantees on dividends though.
The shares are trading at around 27 times expected earnings, well above their average rating since listing.
Half Year results
With Agency and New Home membership broadly stable at 20,450, revenue growth has been driven by a £76 increase in Average Revenue Per Advertiser (ARPA). ARPA per month averaged £987 in the half.
Agency ARPA was up £75 to £940, while New Homes ARPA rose £76 to £1,286. Growth was driven by the sale of additional advertising products in both divisions as well as increases in core membership prices.
Agency now makes up 76% of revenues, with New Homes accounting for 16% and the remainder generated from other sources, like third party advertising.
Rightmove consumer traffic rise 5% year-on-year, averaging 139m visitors a month, with time on site up 4% to 1.1bn minutes a month. Market share of traffic across desktop and mobile was 74%.
Rightmove expect full year ARPA growth to be £80 and are confident of meeting full year expectations.
Unless otherwise stated estimates, including prospective yields, are a consensus of analyst forecasts provided by Thomson Reuters. These estimates are not a reliable indicator of future performance.
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