🔄 Comp Time (TOIL) Calculator

How Does Comp Time (TOIL) Actually Work — And Are You Getting the Right Amount?

Q: I stayed three hours late on Tuesday and my manager says I get "time back." What exactly is TOIL, and how is it different from overtime pay?

A: Time Off in Lieu — almost universally shortened to TOIL, and sometimes called comp time in North America — is a straightforward swap: instead of paying you money for every hour you work past your contracted finish time, your employer banks those hours as future leave. You can then use that leave to take a paid day (or half-day, or even an hour) off at a later date.

The distinction from overtime pay is important. With overtime pay, you receive extra money — typically at a rate of 1.25× or 1.5× your normal hourly wage — on your next payslip. With TOIL, the employer keeps that cash in the business and gives you leave credit instead. Whether that's a good deal for you depends entirely on (a) what accrual rate your employer applies and (b) whether you can realistically use the leave before it expires.

Q: What is an "accrual rate" and why does it vary between employers?

A: The accrual rate is the multiplier your employer uses to convert worked overtime hours into TOIL hours. A 1:1 (straight-time) rate means one overtime hour becomes one TOIL hour. A 1.5:1 rate — the most common in the UK and Australia — means one overtime hour becomes 90 minutes of leave. A 2:1 rate doubles every hour you work into two hours of future leave.

Rates vary because TOIL policies are almost always set by employment contracts, collective bargaining agreements, or internal company policy rather than statute. In most countries, there is no law that mandates a specific TOIL multiplier — the law typically only requires that workers are not paid less than minimum wage when averaged over their total hours. This gives employers wide discretion, which is why you might find a 1:1 rate at one company and a 1.75:1 rate at another in the same industry.

Higher rates (1.5× and above) are generally used to compensate for genuinely inconvenient overtime — working on weekends, public holidays, or at unsociable hours. Straight-time TOIL is more common for modest mid-week overruns.

Q: My contract says 1.5:1 rate. I worked 6 overtime hours last week. How exactly does the maths work?

A: The formula is simple multiplication:

TOIL earned = overtime hours worked × accrual rate

So: 6 hours × 1.5 = 9 TOIL hours earned.

If your standard working day is 8 hours, those 9 hours represent 1 day and 1 hour of leave (9 ÷ 8 = 1.125 days). If you already had 4 hours of TOIL banked, your new total would be 13 hours (1.625 days).

The calculator above automates this entirely — including the conversion to equivalent days based on your specific contracted hours per day, which matters a great deal if you work a compressed 9-hour day or a part-time 6-hour schedule.

Q: Do TOIL balances expire? Can I lose hours I've earned?

A: Yes, in many organisations they do. TOIL expiry policies exist because employers don't want large, open-ended leave liabilities on their books — and because carrying huge TOIL balances is often a signal of chronic understaffing rather than occasional reasonable overtime.

Common expiry windows are 1 month, 3 months, 6 months, and 12 months from the date the overtime was worked. Some organisations apply a rolling window (use it within 3 months of earning it); others set a fixed point in the year where unspent TOIL is wiped. A minority of employers — particularly in the public sector — allow TOIL to accumulate indefinitely.

If your organisation has an expiry policy, the calculator lets you enter the number of months, and it will display your use-by deadline based on today's date. Mark that date in your calendar. TOIL that expires unused is simply lost — it does not automatically convert back to overtime pay unless your contract specifically says so.

Q: What are the common mistakes employees make with TOIL tracking?

A: Three mistakes come up repeatedly:

1. Not recording overtime in real time. Memory is unreliable. If you worked late on a Friday evening and didn't log it until the following Wednesday, you might misremember 2.5 hours as 2 hours. Keep a running log — even a simple note on your phone — of when you started, when you finished, and what the contracted finish time was. The difference is your overtime for that day.

2. Assuming TOIL is always calculated the same way across the week. Many contracts specify different rates for different types of overtime. Weekday overtime might accrue at 1:1 while Saturday accrues at 1.5:1 and Sunday at 2:1. If you worked hours across multiple rate bands, you need to calculate each band separately and add the results together, rather than averaging them.

3. Not checking the employer's records. HR systems sometimes apply the wrong rate, fail to log approved overtime, or cap TOIL accrual at a maximum balance without warning. Request a statement of your TOIL balance periodically and cross-check it against your own records. Discrepancies are far easier to resolve when they're recent.

Q: Can my employer refuse to let me use my TOIL, even though I've earned it?

A: Technically, most TOIL policies give employers the right to approve or reschedule when leave is taken, just as with standard annual leave. They can generally decline a specific request ("not that week — we have a product launch") as long as they offer a reasonable alternative date before the TOIL expires. What they cannot do — in most jurisdictions — is deny you the TOIL altogether without fair reason, especially if it means the balance expires without you having a real chance to use it.

If your employer is systematically refusing TOIL requests in a way that causes balances to expire, that is worth raising formally — first with your line manager, then with HR, and if necessary with your union or an employment rights body. In the UK, for instance, workers have the right not to be subjected to a detriment for asserting statutory employment rights, which can include pressing for leave you've legitimately earned.

Q: Is there a maximum TOIL balance I should be aware of?

A: This is entirely policy-dependent, but many organisations cap the balance at a fixed number of hours — commonly 40 hours (one full week) or 5 days — precisely to prevent individuals from accumulating months of uncapped leave. If you're approaching your cap, you're usually notified that further TOIL will not be granted until you reduce your balance. In that situation, the sensible move is to book TOIL before working additional overtime, not after.

The takeaway is straightforward: TOIL is a genuinely useful benefit when the accrual rate is fair, the expiry window is generous, and you actively manage your balance rather than letting it accumulate silently. Use a calculator to keep precise records, know your policy's limits, and never assume your employer's system is infallible.