Calculate the minimum hourly rate you need to charge to hit your income target as a freelancer.
Estimation tool only. Not financial or tax advice. Consult an accountant for your situation.
Undercharging is the most common financial mistake made by new and intermediate freelancers. It stems from a predictable cognitive error: comparing your hourly rate directly to your previous salary rather than accounting for the structural differences between employment and self-employment.
When you are an employee earning £40,000, your employer also pays employer National Insurance contributions (approximately 13.8% of your salary), pension contributions (usually 3–5%), and provides paid holiday (statutory minimum 28 days in the UK), sick pay, and various other benefits. The true employer cost of a £40,000 salary is closer to £48,000–£52,000.
As a freelancer, you pay all of those costs yourself. You also have no paid holiday, no sick pay, and typically spend 20–30% of your time on non-billable activities (admin, business development, invoicing, chasing late payments). A freelancer needing to match the true cost of a £40,000 employment package needs to bill at a rate equivalent to approximately £60,000–£70,000 gross income to actually take home the equivalent.
A common mistake is calculating rate based on 52 weeks × 40 hours = 2,080 billable hours. In practice, a realistic utilisation rate for a freelancer is 55–65% of working time. Two weeks of holiday, occasional sick days, business development time, administrative time, and gaps between clients typically reduce billable hours to 1,000–1,300 per year. Rate calculations must use realistic billable hours, not theoretical working hours.
Beyond cost-based pricing, rates should be tested against market rates for your specific skill set and sector. Rate calculators give you a floor — the minimum you need to charge to meet your income requirements. Market rates give you a ceiling. Your sustainable rate should be somewhere in between, ideally anchored to the value you create for clients rather than your time cost alone.
Related: Salary to Hourly Converter · Am I Underpaid Calculator · Side Hustle Generator