The research from Crunch Accounting is based on the daily charge-out rates of more than 4,700 one-person companies across the UK since 2013.
The North East has emerged as a growth hotspot for one-person companies, with freelancers charging almost 50 per cent more than in 2013.
Other fast growing regions include Wales and the South West, where daily rates have increased by 31 per cent and 28 per cent respectively.
Meanwhile the worst location to go it alone in business is the North West, where the one-person companies are charging a daily average of £260, £30 less than the national average.
Freelancers in the East Midlands are also suffering with fees dropping by 1.3 per cent since 2013.
London’s one-person businesses have experienced relatively little change with a small 6 per cent increase in fees, despite the rapid rise in business and living costs for the capital.
The average price charged in single-person businesses in Scotland is £316, with the South East (excluding London) at £303.
The survey was commissioned to better understand how incomes are changing among the country’s freelance workforce, with the data drawing on more than 1.8 million billed freelance days.
‘It’s great to see business confidence is on the rise amongst the self-employed, a group that historically undervalues their services,’ says Crunch CEO Darren Fell.
‘These figures confirm what we have long understood here at Crunch, that the self-employed are leading the country’s economic recovery and it’s high time they received greater political support and recognition.’
There are approximately 4.6 million self-employed workers in the UK, the highest level since Office of National Statistics records began almost 40 years ago.