TOIL calculator: agree the conversion before adding hours.
A transparent TOIL balance starts with approved extra work, a stated conversion and a booking/expiry rule.
How do you calculate TOIL?
At a one-for-one rate, one approved extra hour creates one hour of TOIL. If the agreement uses another rate, multiply approved hours by that stated factor and record the approval and expiry date.
There is no universal statutory TOIL formula, so the policy or agreement is the source of the conversion.
What matters
Start with the rule
At a one-for-one rate, one approved extra hour creates one hour of TOIL. If the agreement uses another rate, multiply approved hours by that stated factor and record the approval and expiry date.
Write down the decision
Keep the policy, dates, calculation inputs and decision together so another person can understand what happened.
Check the current source
Do not use TOIL to avoid minimum-wage, rest or working-time obligations. Review unusual or high balances rather than letting them accumulate invisibly.
A practical checklist
For a small team, a short repeatable process beats an impressive policy nobody follows.
- Record approved extra start and end times
- Deduct unpaid breaks
- Apply the written conversion factor
- Record who approved the credit
- State booking and expiry rules
- Check rest, working-time and minimum-wage effects
Where software helps — and where it does not
HollyHR can keep the relevant people record, dates, documents, leave and working pattern in one place. It cannot decide a legal, medical or employee-relations question for you.
Do not use TOIL to avoid minimum-wage, rest or working-time obligations. Review unusual or high balances rather than letting them accumulate invisibly.
Check the source, not just our summary
Rules and product pages change. These are the first-party references behind this page.
Questions people ask
Is this legal advice?
No. It is a practical summary for UK small teams. Check the linked official guidance and take qualified advice for a specific or disputed case.
Why keep the source with the calculation?
Rates and rules change. Recording the inputs, date and source makes the answer reviewable instead of becoming an unexplained number in a spreadsheet.
Can HollyHR track this?
HollyHR can hold the underlying employee, working-pattern, leave and document records. It does not present itself as a legal-advice engine.
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Keep reading: TOIL meaning · Working patterns