Day Rate to Salary Calculator UK

How to Convert a Day Rate to Annual Salary

The calculation itself is straightforward: multiply your daily rate by the number of days you work each week, then multiply that weekly figure by the number of weeks you expect to work in a year. The result is your gross annual equivalent salary.

For instance, a contractor earning £500 per day, working 5 days a week for 46 weeks, would arrive at an annual equivalent of £115,000. That is the salary a permanent employee would need to be paid before tax in order to generate the same gross income.

Keep in mind that this comparison does not account for benefits typically included in permanent roles, such as employer pension contributions, sick pay, private health insurance, and paid parental leave. When evaluating whether a day rate or a salaried position offers better value, these extras should be factored in alongside the raw numbers.

Why 46 Working Weeks?

A calendar year contains 52 weeks, but very few people work every single one. The default of 46 working weeks reflects a realistic assumption: 52 weeks minus approximately 20 days of annual leave and 8 UK bank holidays, which together account for roughly 6 weeks away from work.

This aligns with the statutory minimum holiday entitlement for a full-time employee in the UK, which is 28 days (including bank holidays). If you take more or fewer days off, adjust the weeks per year input to match your situation. Some contractors choose to work 48 or even 50 weeks to maximise earnings, while others prefer a longer break and use 44 weeks instead.

Example Day Rate Conversions

Below are three common day rates converted to annual salary equivalents, assuming 5 working days per week and 46 working weeks per year:

• £300 per day — £69,000 per year (£5,750 per month). This is a typical rate for mid-level IT contractors, project coordinators, and experienced tradespeople working on commercial projects.
• £500 per day — £115,000 per year (£9,583 per month). Common among senior software engineers, management consultants, and experienced financial analysts working on contract.
• £750 per day — £172,500 per year (£14,375 per month). Rates at this level are typical for specialist consultants, interim directors, and niche technical experts in sectors such as energy, infrastructure, and financial services.

Contractor vs Permanent: What to Consider

A higher gross figure does not automatically mean contracting is more lucrative than a permanent role. Contractors bear costs that permanent employees do not: accountancy fees, professional indemnity insurance, IR35 compliance reviews, and the administrative overhead of running a limited company or working through an umbrella company.

Permanent employees, on the other hand, benefit from employer National Insurance contributions towards their state pension record, statutory sick pay, redundancy protection, and often a workplace pension with employer contributions. Many also receive bonuses, share schemes, and training budgets that do not appear in the base salary.

A useful rule of thumb is that a contractor needs to earn roughly 15–20% more in gross terms to match the total compensation package of a permanent employee. However, this varies significantly depending on the sector, the specific benefits offered, and whether the contract falls inside or outside IR35. Use the annual equivalent from this calculator as a starting point, then factor in the full picture before making a decision.