Profit doubled at Budget in the year to 30 June 2003.
The personal lines intermediary grew its turnover by 21% - when the previous year's figures included the acquisition of telephone broker Dial Direct.
Excluding the acquisition, turnover from continuing operations increased by 61%.
The figures are shown in the 2003 accounts for BFSL Ltd, the Budget Group's broking business.
Group finance director Ian Leech said the topline growth reflected the expansion of Bennetts, the motorcycle business bought by Budget the year before.
Sponsorship of World Superbike Champion Neil Hodgson and a push on advertising had raised the brand's profile.
Further topline growth came from Budget's affinity business.
So far this year, the group has signed contracts to supply home cover for Clydesdale Bank, Yorkshire Bank and Northern Bank.
It also arranges motor insurance for Marks & Spencer. Leech said these deals would generate profits for the current year.
"It's the maturing profitability of the Budget business that's really driven profits in 2002 and 2003," he said.
"We are looking for our affinity business and the Bennetts business to drive future profits and growth."