The revenue increase translated into organic growth of seven per cent and a significant boost to profit before tax of 19 per cent to £2.49m.
The performance was largely due to investment in the US and Asia, specifically in digital comms.
Revenues in the firm's core tech business rose by 14 per cent, but the standout performer was its growing digital/research consultancy business, where revenues almost trebled.
During the year, it acquired Type 3, a web design company in London and San Francisco, which it merged with Context Analytics and Project Metal to create Beyond, the group's first pure digital consultancy.
Next Fifteen also acquired an 85 per cent stake in US-based investor relations and 1tech-focused company The Blueshirt Group.
Revenue in the US grew 22 per cent to £21.5m over the first half of the year.
Will Whitehorn, chairman of Next Fifteen, said: 'These results reflect the opportunities the group is experiencing as a result of the market transition to digital. Our heritage in technology and investments in digital have put us in a great position to grow both our core customer base and into adjacent markets.'
He pointed to new clients including Facebook, Google and American Express.