Zero-hour contracts have become a major part of how the UK workforce operates. You can find them in hospitals, restaurants, warehouses, and care homes. They also offer flexibility for some workers. For others, zero-hour contracts bring real financial stress and uncertainty. So if you are also working under this contract, then you must know how your pay is structured. Let us understand that in this blog!

What Is a Zero-Hour Contract?

A zero-hour contract is an agreement between an employer and a worker. There is no minimum number of hours guaranteed under this contract. The employer calls you when they need you, and you can accept or decline. That is the basic agreement.

According to the ONS Labour Force Survey, approximately 1.03 million people in the UK were on zero-hour contracts as of March 2024.  These workers are young, female, or in full-time education. In fact, 37% of people on zero-hour contracts are between the ages of 16 and 24, compared to just 10% of the overall employed workforce. Women also make up 53% of zero-hour workers, which is slightly above their 48% share of total employment.

These are not just small numbers. This is a huge chunk of the UK labour market. 

The Minimum Wage of Zero-Hour Contracts

Here is something every zero-hour worker needs to know: you are entitled to the National Minimum Wage (NMW) or National Living Wage (NLW) for every hour you work. There are no exceptions to this rule.

From 1 April 2025, the rates are:

• National Living Wage (aged 21 and above): £12.21 per hour

• 18-20 age bracket: £10.00 per hour

• Under 18 and apprentices: £ 7.55 per hour

Your employer cannot pay you less than these rates, regardless of how few hours you work or how the business is performing. This rule also applies to reserve time and on-call time if you are required to be at that workplace. The National Minimum Wage Act 1998 is clear on that point. 

Moroeve, if you are sitting in a break room waiting for the lunchtime rush to start, if your employer requires you to be on-site, that time must be paid at minimum wage. Zero hours does not mean zero pay for waiting around when directed to be there.

How Holiday Pay Works for Zero-Hours Workers

Zero-hour workers are entitled to 5.6 weeks of paid annual leave per year. This is the same as any other worker. But the only difference is how the entitlement gets calculated because your hours are not fixed.

So a standard method is used here, which is called rhe 12.07% rule. This figure comes from dividing 5.6 weeks by the 46.4 remaining working weeks in the year (52 minus 5.6). You accrue holiday pay at 12.07% of your earnings for every hour you work.

Also, rolled-up pay became legal again for irregular hours workers from January 2024. This means your employer can add 12.07% om top of your hourly pay each time you are paid. If your employer uses this method, it must be clearly written on your pay slip. 

Moreover, employers must look back at a 52-week reference period when calculating holiday pay. This average can become the basis for how much you are paid when you take a holiday.

Students researching employment law often face these calculations when working on their CIPD assignments. This is one of the most nuanced HK HR practices between flexible contracts and statutory entitlements.

The Problem With Income Instability

Understanding the law is one thing. Living with the reality of zero-hour pay is another.

Your income can swing dramatically from week to week. This is where budgeting becomes difficult. A worker might earn £400 one week and £80 the next. The kind of unpredictability makes it hard to manage rent, childcare, travel costs, or grocery shopping.

This is not a theoretical concern. Research from the TUC has found that a clear majority of zero-hour contract workers remain stuck in insecure work over the long term. They do not use it as a stepping stone to more stable employment. Many people make this contract their permanent working situation.

The demographic data makes it even more concerning. Black workers are 2.7 times more likely than white workers to be on zero-hour contracts. The impact compounds significantly when you layer income instability on top of existing inequality.

What the Employment Rights Act 2025 Changes

The good news is that the legal environment is shifting. The Employment Rights Act 2025 received Royal Assent in December 2025. 

The key changes that affect zero-hour workers include:

• Day-one Statutory Sick Pay (from April 2026): to qualify for SSP, you need to earn at least £125 per week. This lower earning limit is removed from April 2026. This means that zero-hour workers will be entitled to sick pay from their very first day of illness, regardless of how much they earned the previous week.

• Guaranteed Hours Requirement (from 2027): if your working patterns become regular and predictable over time, your employer will be required to offer you a contract that reflects those hours. This is a massive shift. It targets the situation where workers are effectively treated as permanent staff but kept on a zero-hours contract to avoid giving them proper employment security.

• Shift Notice Requirements (from 2027): employers will also need to give reasonable notice before cancelling or changing shifts. Workers will be entitled to compensation if shifts are cancelled at short notice.

Final Words

Zero-hour contracts are not inherently bad. People who need flexibility, like students or semi-retired workers, can work well under this contract. The problem is when they are used as a tool to extract labour without providing stability or security in return.

The minimum wage floor exists to make sure that a worker’s time has a guaranteed value. Also, the holiday pay rules exist to make sure flexibility does not mean working all year without a proper break. And the upcoming Employment Rights Act 2025 changes exist because policymakers have acknowledged that the current system still leaves too many people in a precarious position.

If you work under a zero-hour contract, the law is on your side in more ways than many people realise. The key is to know what you are entitled to and make sure that you get it.