pro rata annual leave calculator

How pro rata annual leave works

Pro rata annual leave means holiday entitlement is adjusted fairly based on working pattern and time employed during the leave year. If someone works fewer days than a full-time colleague, or only works part of the year, they should still receive leave in proportion to that arrangement.

When you need a pro rata holiday calculator

• You work part-time (for example, 2, 3, or 4 days per week).
• You joined after the start of the holiday year.
• You are leaving before the holiday year ends.
• Your employer tracks leave in hours and you need a days-to-hours conversion.
• Your hours or working pattern changed during the year and you want a clear estimate.

Step-by-step example

Example: part-time employee joining mid-year

Assume a company gives full-time staff 28 days annual leave, based on a 5-day week. An employee works 3 days per week and starts halfway through the leave year.

• Part-time adjusted annual leave: 28 × (3 ÷ 5) = 16.8 days
• If employed for 50% of the leave year: 16.8 × 0.5 = 8.4 days
• If they already used 2 days: remaining balance = 6.4 days

This is exactly the type of scenario the calculator handles automatically.

Practical guidance for employees

1) Confirm your leave year dates

Many people assume leave runs January to December, but lots of employers use custom dates (for example April to March). Always start with your actual policy dates.

2) Check whether public holidays are included

Some companies include bank/public holidays in the total entitlement while others separate them. Enter the number your contract uses for the most accurate result.

3) Understand rounding rules

Some HR teams round leave up to the nearest half-day or hour, while others keep exact decimals. This calculator shows decimal values; your final approved balance may follow your employer’s rounding policy.

Practical guidance for managers and HR teams

• Document one standard pro rata method and apply it consistently.
• State clear rules for rounding, carry-over, and treatment on termination.
• Use calendar-day proration for transparency when people join or leave mid-year.
• Recalculate promptly when schedules change (e.g., from 5 days to 4 days per week).

Common questions

Does pro rata leave apply only to part-time staff?

No. It also applies to full-time workers who join or leave during the leave year.

Can leave be converted to hours?

Yes. If your company tracks annual leave in hours, multiply days by standard daily hours. The calculator includes this conversion.

What if I have irregular shifts?

For irregular schedules, some employers calculate entitlement using hours worked rather than days per week. This tool is best for regular weekly patterns.

Is this legal advice?

No. This page provides an estimate for planning and discussion. Local employment law, collective agreements, and contract terms can override simple calculations.

Note: If your organisation has specific rules for overtime, accrued leave during sick leave, maternity/paternity leave, or public holiday substitution, those factors should be applied after this baseline pro rata calculation.

Bottom line

A clear pro rata annual leave calculation reduces payroll errors, improves trust, and helps both employees and employers plan confidently. Use the calculator above to estimate entitlement quickly, then validate the final figure against your company policy.