Contractor Salary Calculator: Making Sense of Hourly vs Salaried Pay in the UK

If you're a contractor, freelancer, or considering a move between hourly and salaried work, a contractor salary calculator is an essential tool. It helps you convert your hourly rate into an annual salary equivalent, allowing you to compare offers and understand where you stand against UK benchmarks. This article uses the latest official data from the Office for National Statistics (ONS) and NHS pay scales to give you a clear picture.

How the Contractor Salary Calculator Works

The basic formula is straightforward: annual salary ≈ hourly rate × hours per week × 52 weeks. For example, if you earn £20 per hour and work 37.5 hours a week, your gross annual equivalent is £20 × 37.5 × 52 = £39,000. This matches closely with the UK median full-time annual salary of £39,039 reported by ONS ASHE for April 2025. The calculator assumes a steady contracted week with no unpaid overtime, bonuses, tips, or salary sacrifice. Always check your contract and official GOV.UK guidance for your specific situation.

UK Median Earnings as a Benchmark

The ONS Annual Survey of Hours and Earnings (ASHE) for 2025 provides the most authoritative picture of UK pay. For full-time employees, median weekly earnings were £766.60, and median hourly earnings (excluding overtime) were £19.67. Part-time workers had a median weekly pay of £280.00. These figures are a useful starting point for contractors: if your hourly rate is above £19.67, you are earning more than the typical full-time employee. However, remember that employees receive benefits like holiday pay, pension contributions, and sick pay, which contractors must fund themselves.

NHS Pay Scales: A Detailed Comparison

For those in healthcare or considering NHS contracts, the NHS pay scales for 2026/27 offer a clear hourly-to-annual mapping. At Band 5 (entry level for many nurses and allied health professionals), the annual salary is £38,488, equating to £19.68 per hour. Band 6 (e.g., specialist nurses, paramedics) starts at £47,951 annually, or £24.52 per hour. These rates include Higher Cost Area Supplements (HCAS) for London and other high-cost areas, which can add up to 20% of basic salary. A contractor salary calculator can help you see whether your freelance rate beats these banded salaries after accounting for your own overheads.

National Living Wage and Low Pay

The National Living Wage (NLW) for workers aged 21 and over was £12.21 per hour in April 2025. At 37.5 hours per week, that equates to about £23,809.50 per year. The ONS low pay bulletin noted that 447,000 jobs (1.6% of all employee jobs) were paid below the NLW, with a large concentration of jobs paid within 20 pence of the £12.21 rate. If you are a contractor earning near the NLW, the calculator will show a low annual figure, but you may have more flexibility in hours or multiple contracts.

London Weighting and Overtime

Contractors in London often command higher rates to offset living costs. The NHS HCAS system provides a clear example: outer London areas add around 20% of basic salary, with a minimum payment of £5,794 and maximum of £8,746. Overtime is another factor – many employees receive time-and-a-half or double time for extra hours. A contractor salary calculator typically does not include these, so you may need to manually adjust your effective hourly rate if you regularly work overtime or receive location premiums.

Using the Calculator for Career Decisions

Whether you are comparing a permanent job offer with a contract role, or checking if your freelance rate is competitive, the contractor salary calculator is your first step. Use it alongside our Hourly to Salary converter and explore salary data for your occupation. Remember that the ONS ASHE data is based on a 1% sample of PAYE records and is provisional for 2025, so treat it as a guide rather than a guarantee.

Key Takeaways

• The UK median full-time annual salary is £39,039 (ONS ASHE 2025).
• At 37.5 hours per week, £19.67 per hour matches the median.
• NHS Band 5 pays £19.68 per hour; Band 6 pays £24.52 per hour (2026/27).
• National Living Wage (21+) is £12.21 per hour (2025).
• Always factor in holiday pay, pension, and NI when comparing contractor rates with salaried roles.

For more detailed breakdowns by occupation, visit our topics page. And if you need to do the maths yourself, head to the hourly calculator.

Disclaimer

Hourly-to-salary figures assume a steady contracted week with no unpaid overtime, bonus, tips, or salary sacrifice. Annual ≈ hourly × hours/week × 52. Actual pay depends on rota, holiday pay method, London weighting, and overtime rules. Always check your contract and official GOV.UK guidance.