Holiday Accrual Calculator
Estimate how much paid leave you have accrued so far in your holiday year.
How this holiday accrual calculator works
This tool estimates your pro rata holiday entitlement for a specific point in time. It is useful if you want to check your paid time off (PTO) balance mid-year, or if you started a role part way through a leave year. The calculator uses a simple day-based accrual method: it compares the number of days elapsed in your accrual period against the total number of days in the holiday year.
The result gives you an estimated accrued balance, how much leave has already been used, and how much remains. If your taken leave is higher than the accrued amount, the tool will show an overdrawn balance.
What each input means
Annual holiday entitlement (days)
Enter your full-year leave allowance in days. This should include any contractual entitlement your employer gives you. If your organisation includes public holidays in the total, use that full figure.
Holiday year start and end dates
Some employers use January to December, while others use April to March or your work anniversary cycle. Enter the exact dates used by your employer so your accrual estimate is aligned with company policy.
Calculate as of date
This is the date you want to check your balance on. For example, use today for a live estimate, or a future payroll date for planning.
Employment start date
If you joined after the holiday year started, enter your start date to calculate leave only from when you became eligible. If left blank, the calculator assumes accrual begins at the holiday year start date.
Holiday already taken, working days, and hours
Enter time already used in days. Working days per week and hours per day are optional productivity inputs used to show equivalent weeks and hours for your balance.
Accrual formula used
The calculator uses this core formula:
Accrued leave (days) = Annual entitlement × (Elapsed accrual days / Total holiday year days)
Then it calculates:
- Remaining leave = Accrued leave − Leave taken
- Remaining hours = Remaining leave × Hours per day
- Accrued weeks = Accrued leave ÷ Working days per week
Practical examples
Example 1: Full-year employee
If your entitlement is 28 days, your holiday year is Jan 1 to Dec 31, and you check on June 30, you are roughly halfway through the year. You will have accrued around half your entitlement (about 14 days).
Example 2: Mid-year joiner
If your holiday year starts Jan 1 but you joined April 1, your accrual begins from April 1 (not January). That usually means a smaller balance early in the year, but still fair pro rata entitlement.
Example 3: Leave taken early
Some teams allow leave to be taken in advance of accrual. If you took more than you have accrued so far, your result will show a negative remaining balance (overdrawn leave).
Common holiday accrual methods employers use
- Daily accrual: Leave builds every day of the holiday year (used by this calculator).
- Monthly accrual: Entitlement builds in equal monthly chunks.
- Per pay period: Accrual credited on each payroll run.
- Hours-based accrual: Often used for variable schedules or shift-based contracts.
Tips for better leave planning
- Check your balance monthly, not only before year-end.
- Submit leave requests early for peak periods.
- Track public holidays separately if your policy treats them differently.
- Keep copies of approved requests and HR balance updates.
- Confirm carry-over rules before the holiday year closes.
Frequently asked questions
Is this result legally binding?
No. This is an estimate tool for planning and understanding. Your official balance is determined by your employer's policy, HR system, and local employment law.
Does the calculator account for leap years?
Yes. Because it uses actual dates, leap-year holiday cycles automatically use the correct number of days.
Can I use this for part-time workers?
Yes. Just enter the part-time annual entitlement in days and your normal working days per week. You can also convert results to hours for easier rota planning.
What if my calculation date is after the holiday year ends?
The calculator caps accrual at the holiday year end date and shows a note so you know the date was adjusted.
Final note
A holiday accrual calculator is a simple but powerful planning tool. Whether you are managing your own PTO, supporting a team, or checking a new starter's pro rata leave, understanding accrual helps avoid surprises and improves scheduling decisions.