Common Myths About Hourly Pay and Overtime

Understanding your pay can be confusing, especially when you’re offered an hourly rate but need to compare it with salaried roles, or when overtime and holiday pay come into play. Many workers rely on rough rules of thumb that can lead to surprises on payday. Here we bust five common myths and explain how a take home pay calc can give you the real picture.

Myth 1: Hourly Rate × 40 Hours × 52 Weeks = Your Exact Annual Salary

It’s a neat formula, but it rarely matches reality. The standard conversion used by employers and HMRC is hourly rate × hours per week × 52 weeks – that much is correct. But many full-time roles are based on 37.5 hours, not 40. According to the ONS Annual Survey of Hours and Earnings (ASHE) 2025, median full-time weekly earnings were £766.60, and median hourly earnings (excluding overtime) were £19.67. If you work 37.5 hours a week at that rate, your annual gross pay would be around £38,400 – close to the median annual figure of £39,039, but not identical because of overtime, bonuses, and unpaid leave.

Moreover, if your hours vary week to week – common in retail, hospitality, or zero-hours contracts – your annual income will differ. Always check your contract for guaranteed hours. A take home pay calc that lets you input your typical weekly hours will give a more accurate estimate.

Myth 2: Overtime Is Always Paid at Time-and-a-Half

There is no UK law that requires employers to pay a premium for overtime. The legal minimum is simply the National Minimum Wage for each hour worked. Many employers do offer 1.5× or even double time, especially in unionised sectors or for unsocial hours, but it is not a right unless stated in your contract. Some contracts even specify that overtime is paid at the standard hourly rate. Always read your employment contract carefully. If you regularly work overtime, use a take home pay calc that includes overtime hours to see how your net pay changes.

Myth 3: Your Take-Home Pay Is Just Gross Salary Minus Tax and NI

Income tax and National Insurance are the biggest deductions, but they are not the only ones. Most employees are automatically enrolled into a workplace pension, with a minimum contribution of 5% from you and 3% from your employer (though you can opt out). If you have a student loan, repayments will be deducted at 9% (Plan 1/2/4) or 6% (Postgraduate) above certain thresholds. Salary sacrifice schemes – such as cycle-to-work, childcare vouchers, or additional pension contributions – reduce your gross pay for tax purposes but also lower your take-home cash. A good take home pay calc will let you add these deductions. Our hourly calculator includes options for pension and student loan.

Myth 4: The National Living Wage Is the Same for Everyone

The National Living Wage (NLW) applies to workers aged 21 and over, but there are lower statutory minimum rates for younger workers and apprentices. From April 2026, the NLW is £12.71 per hour for those 21+. Workers aged 18–20 are entitled to £10.85 per hour, and those aged 16–17 (and apprentices in their first year) get £8.00 per hour. These rates are set by the government and reviewed annually. Some employers pay the voluntary Real Living Wage, which is £13.45 per hour UK-wide and £14.80 in London (2025-26 rates). Always check which rate applies to you. Our salary data page lists the latest statutory rates.

Myth 5: London Weighting Is Automatically Added to Your Pay

There is no legal requirement for employers to pay a London weighting or cost-of-living supplement. Many large employers, especially in the public sector, do add a London allowance – for example, NHS pay scales include a London weighting of 20% or a fixed amount depending on zone. But in the private sector, it varies widely. If you are considering a job in London, ask explicitly about any location-based pay adjustments. A take home pay calc that lets you enter your specific gross salary will show you the net effect, but it cannot guess at London weighting unless you input it.

How to Get an Accurate Picture

The best way to avoid surprises is to use a take home pay calc that accounts for your exact hours, tax code, pension contributions, and any other deductions. The standard conversion formula – hourly rate × hours per week × 52 weeks – is a good starting point, but remember that actual pay may differ due to unpaid overtime, holiday pay methods, and variable hours. Always refer to your contract and official GOV.UK guidance for definitive figures.

For a quick estimate, try our hourly calculator which converts your hourly rate to annual, monthly, and weekly figures, and shows estimated tax and NI. And for the latest UK earnings benchmarks, visit our salary data page, which includes median earnings from ONS ASHE and current minimum wage rates.