DUBAI: Abu Dhabi's Aldar Properties, one of the Gulf's biggest developers, reported an 18.5 percent jump in second-quarter net profit on Tuesday, attributing it to higher recurring revenues, better margins and lower financing costs.

The state-linked company, which developed Abu Dhabi's Formula One circuit among other projects, made a profit attributable to shareholders of 599.2 million dirhams ($163.14 million) in the three months to June 30, it said in a statement.

It has now reported higher profits in eight out of nine quarters, Reuters data shows.

SICO Bahrain had forecast Aldar would make a quarterly profit of 514.6 million dirhams.

Aldar's second-quarter revenue fell to 1.11 billion dirhams, from 2.19 billion dirhams a year earlier.

Revenues last year were exceptionally high because Aldar handed over a large number of completed residential units and booked revenues from those sales, chief financial officer Greg Fewer told a conference call.

Under new accounting standards adopted by the company this year, it will periodically recognize revenue from property sales during the construction process rather than solely when units are handed over to buyers.

Aldar's quarterly gross profit from its recurring revenue streams, which includes its property leasing, retail and hospitality businesses, surged 60 percent to 340 million dirhams versus a year earlier, Fewer said.

The company's overall gross profit margin was 45 percent in the second quarter, up from 15 percent a year ago.

"Our rental business is very high margin," said Fewer.

The company repaid 1.1 billion dirhams of debt in the second quarter, reducing its debts to 7.1 billion dirhams after it collected 1.2 billion dirhams in receivables from Abu Dhabi's government.

Fewer said Aldar's debt would decline steadily in line with amortisation, while the company was also talking to banks to refinance existing debt at cheaper rates and for a longer period.

The company said it has yet to see any impact on its operations from the sustained slump in oil prices, while it expects construction costs will fall.

Aldar's financing costs, which relate to interest payments and hedging costs, were 61.5 million dirhams in the second quarter, versus 113.1 million in the same period of 2014.

State-owned fund Mubadala Development Co owns 37.3 percent of Aldar, according to Reuters data.