As of 13 August 2026, AI can only partly calculate holiday pay for your employees.
This still needs a person who signs their name to it.
Can you do it?
15 minutesto a draft.
1 hourto something you’d act on.
Cost, all in£0
Skill neededpower-user
Who has to check ita professional
What the alternative costsThe listed tool data gives no price for a payroll professional or holiday-pay service.
If this goes wrong, employees may be underpaid and you may need to correct payroll, repay arrears and handle complaints or disputes.
What to actually do
Hand it to a person
The route this page recommends
Someone with a licence or accountable authority has to sign this before it counts.
Use a tool built for this
Second choiceDo it yourself
The distant thirdA chat interface, power-user skill, and roughly 1 hour until you can act on the result.
How to actually do it
- Open the GOV.UK holiday entitlement and holiday pay guidance, and save the sections that apply to your employees and leave year.
- Export an anonymised payroll sheet containing each employee's working pattern, pay frequency, pay components, relevant pay periods and actual payments.
- Export the holiday record showing each employee's entitlement, leave year, holiday dates or hours taken, and any remaining balance.
- Remove names, addresses, bank details and other unnecessary personal information, then paste the rule extracts and both tables into a chatbot with the prompt above.
- Ask the chatbot to calculate each employee separately, show every source figure and formula, and list missing facts rather than filling gaps.
- Recalculate the totals in a spreadsheet using the displayed source figures and formulas, then compare the outputs with the payroll and holiday records.
- Send the inputs, source extracts, AI calculation and your arithmetic check to a UK payroll professional or employment adviser for review before using the figures in payroll.
Prompt
Calculate holiday pay for the employees in the data below using current UK rules. Use only the payroll records, leave records and rule sources I provide, or current GOV.UK guidance that you can access and identify. Do not guess missing facts, pay elements, working patterns or legal treatment. First list the facts you have and the facts you need. Then identify which parts of pay may need to be included, which holiday entitlement and leave-year assumptions you are using, and whether any employee needs separate treatment because of irregular hours, variable pay, commission, overtime, term-time work or another unusual pattern. Calculate each employee separately and show the source figures, formula, holiday dates or hours used, result, rounding and any assumptions in a table. Produce a second table showing the information or rule that could change each result. Do not present the result as final payroll advice. Mark every unresolved legal or factual issue for review by a UK payroll professional or employment adviser. Data: [paste anonymised employee payroll records, pay components, working patterns, holiday entitlement, leave dates or hours, leave year, and relevant GOV.UK rule extracts here].
Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.
What it gets wrong
- AI cannot decide reliably whether an unusual pay element belongs in the calculation when the facts and legal treatment are ambiguous.
- AI cannot take responsibility for correcting an underpayment or defending the calculation if an employee challenges it.
- AI cannot replace a payroll professional's check that the rules, leave year and working-pattern assumptions match your current arrangements.
- AI cannot safely fill gaps in missing payroll or holiday records without risking a wrong result.
What caps this at PARTLY: legal accountability, verification cost and judgement under ambiguity.
How we scored this
Five axes, each scored nought to two by hand: ten means AI carries the task cleanly, and the thresholds that turn a total into YES, PARTLY or NO are published in the methodology. Each axis name links to its definition.
| Axis | Score (0–2) |
|---|---|
| Output | 2 |
| Inputs | 1 |
| Verification | 1 |
| Liability | 1 |
| Effort delta | 2 |
| Total | 7 / 10 |
The methodology and its thresholds are published in full.
FAQ
- Can ChatGPT calculate holiday pay?
- Yes, it can organise payroll data and produce holiday-pay calculations, formulas and tables. It cannot reliably settle ambiguous UK payroll treatment, so have a UK payroll professional or employment adviser check the result before you use it.
- How do I calculate holiday pay for my employees?
- Gather each employee's working pattern, pay records, pay elements, entitlement and leave taken, then apply the UK rules that match those facts. AI can do the sorting and arithmetic, but the assumptions and final figures need a payroll professional's review.
- Can AI calculate holiday pay for irregular-hours workers?
- It can calculate scenarios if you provide complete hours, pay and leave records and the applicable rule sources. Irregular-hours cases are easier to misclassify, so a UK payroll professional or employment adviser should check the treatment before payment.
- Is AI holiday pay calculation safe for payroll?
- It is suitable for a draft calculation and an arithmetic cross-check, not as an unreviewed payroll decision. This is not professional advice, and your business remains responsible for correcting any underpayment or mistake.
Nearby answers
- Can AI add a new employee to my UK payroll?PARTLY
- Can AI apply the correct tax code to an employee?NO
- Can AI audit my UK payroll for errors?PARTLY
- Can AI automate my UK payroll?NO
- Can AI calculate employee National Insurance deductions?YES
- Can AI calculate employer National Insurance contributions?PARTLY
Assessed by gpt-5.6-luna (gpt-5.6-luna) on 2026-08-13, second-checked by an independent model. Wrong somewhere? Email [email protected] and it gets re-checked.
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