How to Work Out Annual Salary from Hourly Pay

Understanding how to work out annual salary from an hourly rate is essential for UK job seekers and employees. Many people assume it’s a simple multiplication, but common myths about overtime, contracted hours, and location allowances can lead to inaccurate expectations. This guide uses the latest official data from the Office for National Statistics (ONS) and NHS Employers to help you convert your hourly pay into a realistic annual figure.

The Basic Conversion Formula

The standard method to work out annual salary is: hourly rate × contracted weekly hours × 52 weeks. For example, if you earn £20 per hour and work 37.5 hours a week, your gross annual salary would be £20 × 37.5 × 52 = £39,000. This matches the UK median full-time annual salary of £39,039 reported by ONS ASHE for April 2025. However, the formula assumes you are paid for every week of the year and that your hours are fixed. In reality, many jobs have unpaid holidays (though most workers receive statutory holiday pay), variable shifts, or unpaid overtime.

What the Latest UK Data Shows

ONS ASHE 2025 data reveals that median hourly earnings (excluding overtime) for full-time employees were £19.67, while median gross annual earnings for those in the same job for at least a year were £39,039. The National Living Wage for workers aged 21 and over was £12.21 per hour from April 2025. For younger workers, rates are lower: £10.00 for ages 18–20, £7.55 for ages 16–17, and £7.55 for apprentices. These figures are a useful benchmark when negotiating pay or comparing job offers.

NHS pay scales for 2026/27 provide another real-world example. A Band 5 nurse starts at £38,488 annually (£19.68 per hour), while a Band 6 nurse starts at £47,951 (£24.52 per hour). These rates include Higher Cost Area Supplements (HCAS) for London and surrounding areas, which can add 5% to 20% to basic pay. When using our hourly calculator, remember to factor in any location allowances.

Common Myth: Overtime Boosts Your Annual Salary

A frequent mistake is assuming that overtime pay is part of your base annual salary. In most UK jobs, overtime is paid separately and may not be guaranteed. Some roles offer time-and-a-half or double time, while others provide only time off in lieu. ONS ASHE data distinguishes between basic pay and overtime pay. If you include overtime in your hourly rate when converting to annual, you overstate your guaranteed income. Always use your basic contracted hourly rate for salary calculations.

Myth: 40 Hours Is the Standard Week

Many people default to a 40-hour week when converting hourly to annual. However, the NHS and many public sector roles use 37.5 hours. ONS defines full-time as over 30 hours, but actual contracted hours vary by industry. Check your employment contract for your specific weekly hours. Using 40 hours when you actually work 37.5 will overestimate your annual salary by about 6.7%.

Myth: London Weighting Is Optional

London weighting or HCAS is not optional for employers in high-cost areas, but it varies by role and location. For NHS staff in inner London, the supplement is 20% of basic salary (minimum £5,794, maximum £8,746). In outer London it’s 15%, and in fringe areas it’s 5%. If you’re comparing a London job with a regional one, always add the weighting to your annual figure. Our salary data pages include regional breakdowns to help you make accurate comparisons.

How to Use This Information

To work out your annual salary accurately:

1. Find your basic hourly rate (excluding overtime, bonuses, or tips).
2. Confirm your contracted weekly hours (check your contract or ask HR).
3. Multiply: hourly rate × weekly hours × 52.
4. Add any guaranteed allowances (e.g., London weighting, shift premiums).
5. Remember that this is gross pay before tax and National Insurance. The tax-free Personal Allowance is £12,570 for most people, so your take-home pay will be lower.

If you’re a part-time worker, use your actual weekly hours. ONS data shows part-time median hourly pay is often lower than full-time, so be cautious when comparing roles.

Final Thoughts

Knowing how to work out annual salary from hourly pay helps you evaluate job offers, plan your finances, and negotiate effectively. Always rely on official sources like ONS ASHE, GOV.UK National Living Wage rates, and sector-specific pay scales. Avoid the myths about overtime and standard hours, and always check your contract for the details that matter.

For more tools and guides, visit our Hourly to Salary, salary articles, or hourly calculator.