Grant Thornton US has reported fee income of $1.274bn in the year to 31 July 2013, up 5%.
The revenue increase was organic and led by a 9% increase in advisory services revenues.
Audit service revenues were up 2% and tax 6%.
"Attaining record revenues in a still tepid economic environment is a testament to our long-term strategy of focusing on dynamic, mid-sized clients that are poised for growth," Grant Thornton US chief executive Stephen Chipman said.
"We continue to invest in talent who make a marked difference in the quality and breadth and depth of our services to clients in our chosen markets."
The firm also said it resolved "several long-standing legal matters" during the year and made several investments.
The investments include the opening of a shared service center in Bangalore, India, and a recent acquisition of the Oracle Solutions business unit of MarketSphere.
"Providing our clients with a more comprehensive suite of innovative advisory services is a key firm objective," Chipman added.
Grant Thornton US