Willis says it remains on track to post a full-year operating margin of 24% after unveiling third-quarter net income of $US67 million ($73 million).

The world's third-largest broking firm experienced a $US22 million ($24 million) dip in net income from the third quarter of 2006 on tax losses from the sale of its London headquarters and substantial expenditure on company restructuring.

Despite the fall in net income, revenue for the third quarter rose 6% to $US574 million ($624 million) on favourable currency translations and new income from acquisitions. The operating margin was 16.2% - slightly down on the corresponding quarter last year.

"Our results from this quarter once again illustrate the continued execution of the ‘Shaping our Future' strategy for profitable growth," CEO Joe Plumeri said.

Willis reported net income of $US314 million ($341 million) for the first nine months of 2007, up from $US301 million ($327 million) for the same period last year. The operating margin for the first three quarters of 2007 also remains strong at 24.2%, up one percentage point since last year.