Not sure how much holiday you should have left this year? Your working days, employment dates, and weekly hours can all affect your annual leave. This is especially important when you work part-time, start a job during the holiday year, or change your working pattern. Instead of relying on guesswork, a Pro Rata Holiday Calculator can help you estimate your holiday entitlement using the details of your work schedule.

Your Working Pattern Sets the Starting Point

Your normal working pattern is one of the first things to consider when calculating holiday entitlement.

In the UK, most workers are legally entitled to 5.6 weeks of paid holiday each year. For someone working five days a week, this usually equals 28 days.

For regular part-time workers, the same 5.6-week principle applies to their normal working pattern.

For example:

• 5 days per week × 5.6 = 28 days

• 4 days per week × 5.6 = 22.4 days

• 3 days per week × 5.6 = 16.8 days

• 2 days per week × 5.6 = 11.2 days

This gives you a starting figure before considering factors such as when you started employment or whether your working pattern changed.

How to Work Out Leave for Part-Time Work

Working part-time does not mean losing your statutory holiday entitlement. Instead, your holiday is calculated according to the number of days you normally work.

Suppose you work three days every week. Your statutory annual entitlement would generally be:

3 × 5.6 = 16.8 days

If your employer provides additional contractual holiday, your total allowance could be higher.

The key point is that 5.6 weeks of leave is applied to your normal working week. So, one full week of holiday for a three-day-a-week employee would normally use three days from their holiday allowance.

Starting a Job Midway Through the Holiday Year

Starting a new job part way through the holiday year can make the calculation less straightforward.

Imagine your employer's holiday year runs from January to December and you start working in July. You will not normally have the same full-year allowance available as someone who worked throughout the entire year.

For a regular-hours employee with a yearly entitlement of 22.4 days, a simple six-month example would be:

22.4 × 6 ÷ 12 = 11.2 days

The actual calculation can depend on the employment dates and the method used by the employer.

Checking your start date alongside your annual entitlement can therefore give you a much clearer picture of how much leave you can take during your first year.

What Happens When Your Working Days Change

A change in working pattern can also affect how holiday entitlement is expressed.

For example, you might originally work five days a week and later move to three days. Your annual leave should be considered in relation to your working pattern rather than simply carrying the same number of days across without adjustment.

This is important because a holiday day represents a working day. If you normally work three days each week, taking one complete week away from work would generally use three days of leave.

Whenever your hours or working days change, check how your employer recalculates the remaining holiday balance.

Turning Working Hours Into Holiday Hours

Some employees find it easier to track holiday in hours rather than days, particularly when their working days have different lengths.

For example, suppose you work 30 hours across four days each week. Your average working day would be:

30 ÷ 4 = 7.5 hours

If your annual entitlement were 22.4 days, an equivalent calculation could be:

22.4 × 7.5 = 168 hours

This can make holiday records easier to understand when one working day is not always the same length.

The correct calculation can vary depending on the type of employment and working pattern, so your employer's holiday policy should also be checked.

The 5.6-Week Rule Explained Simply

The statutory holiday entitlement for most workers is 5.6 weeks per year.

For a full-time employee working five days per week:

5 × 5.6 = 28 days

The statutory entitlement is capped at 28 days for someone working five or more days per week.

For regular part-time employees, the calculation reflects their normal working days. This means someone working fewer days can still receive the equivalent of 5.6 weeks of their usual working pattern.

Understanding the 5.6-week figure makes it much easier to see where the final holiday number comes from rather than treating it as an arbitrary allowance.

How Bank Holidays Fit Into Your Allowance

Bank holidays are another area that can cause confusion.

An employer can include bank holidays as part of a worker's statutory paid holiday entitlement. They do not automatically have to be provided as extra days on top of the statutory allowance.

For example, if you are entitled to 28 days of statutory leave, your employer may count some or all of the relevant bank holidays within those 28 days.

Your employment contract should explain how bank holidays are handled in your workplace.

Holiday Rules for Irregular and Part-Year Workers

Holiday calculations can work differently for people who do not have regular working hours or who work only part of the year.

For leave years beginning on or after 1 April 2024, specific statutory accrual rules apply to irregular-hours and part-year workers. GOV.UK guidance states that holiday entitlement for these workers can generally accrue at 12.07% of hours worked in each pay period.

For example, if a worker completes 40 hours during a relevant pay period:

40 × 12.07% = 4.828 hours

The resulting figure is then handled according to the applicable rules.

This means you should not automatically use the standard days-per-week calculation when dealing with an irregular working pattern.

A Faster Way to Check Your Leave

Calculating holiday manually is possible, but several details may need to be considered at the same time.

These can include:

• Days worked each week

• Hours worked

• Employment start date

• Employment end date

• Holiday year dates

• Previous leave taken

• Bank holidays

• Whether your working pattern is regular or irregular

This is where proratacalculators can make the process easier by giving users a structured way to work through their figures and estimate their entitlement.

A Pro Rata Holiday Calculator uk can be particularly useful when you want to check a part-time entitlement or estimate leave after starting a job during the year.

Check These Details Before Booking Time Off

Before relying on a calculated figure, check the information used in the calculation.

First, confirm your employer's holiday year. It may run from January to December, April to March, or follow another period specified in your contract.

Next, check your normal working pattern and whether your employer provides additional contractual holiday above the statutory minimum.

You should also check how bank holidays are treated and how much leave you have already taken.

These details can prevent simple mistakes when estimating your remaining allowance.

Make Your Holiday Calculation Clearer

Understanding your holiday entitlement does not need to involve complicated calculations. Once you know your working pattern, annual allowance, employment dates, and relevant holiday rules, you can build a clearer estimate.

Regular part-time workers can generally calculate their annual entitlement using their normal number of working days and the 5.6-week statutory figure. Workers with irregular hours or part-year arrangements may need to use the specific accrual rules that apply to them.

A calculator can save time and provide a useful estimate, but your employment contract and current UK rules should always be checked when determining your actual entitlement.

1. How is pro rata holiday calculated?

For regular-hours workers, holiday can be calculated from the number of working days per week and the 5.6-week statutory entitlement, with adjustments where appropriate.

2. How much holiday does a 3-day worker get?

A regular worker who works three days per week would generally have 16.8 days of statutory leave for a full leave year.

3. Can I calculate holiday if I start halfway through the year?

Yes. Your full annual entitlement can be adjusted according to the relevant period of employment, although the precise calculation depends on your circumstances.

4. Are bank holidays included in annual leave?

They can be. Employers may count bank holidays as part of the statutory holiday entitlement.

5. Can holiday entitlement be calculated in hours?

Yes. Hours can be useful for workers whose daily working hours vary or where holiday is tracked by hours.