Many self-employed workers put in extra time each year compared to full-time employees.
Research by Crunch surveyed 1,000 self-employed people and found they work an average of 14 more hours each week.
The poll also found January is the most stressful month of the year for 31 per cent of self-employed workers, with 15 per cent saying it is due to the need to meet business deadlines, including the self-assessment tax deadline on January 31st.
A further 66 per cent often find it difficult to sleep because of work-related concerns and 72 per cent revealed financial worries keep them awake.
More than a third said they had given up working the standard nine to five, with many starting work before 8am and six per cent admitting to working between 4am to 5am, while one in six had checked their work emails between 3am and 7am.
However, this seems at odds with 56 per cent who said they become self-employed to achieve a better work-life balance and be more in control of their working hours.
This was further highlighted, with self-employed workers taking an average of 14 days holiday a year – half the national average for employees.