The Labor Code’s normal workday is eight hours. A compressed workweek (CWW) is a flexible arrangement that redistributes the same weekly hours over fewer days, commonly four 10-hour days instead of five eight-hour days. The extra two hours per day are not automatically overtime because they are offset by an additional non-working day.
Not every long shift is a CWW
A compressed workweek is a formal flexible work arrangement, not a label an employer can attach to any 10-hour schedule. DOLE Department Advisory No. 02, series of 2009, describes voluntary adoption, normal hours of more than eight and up to twelve, documentary requirements, and notice to the DOLE Regional Office. The requirements can be amended, so check the current issuance. If the requirements are not met, the ordinary eight-hour rule applies.
Read DOLE Department Advisory No. 02, series of 2009 and any newer flexible-work issuance before relying on a compressed workweek. The arrangement still needs a voluntary agreement and must not reduce pay or benefits below the statutory minimum.
Where overtime starts
In a valid 4×10 schedule, the normal workday is 10 hours. Work beyond 10 hours is overtime. If an employee works 12 hours on a compressed workday, the first 10 hours are regular and the last two are overtime.
- Hours 1–10: regular pay for the compressed workday.
- Hours 11–12: overtime at the applicable premium.
- Night differential still applies to hours between 10 p.m. and 6 a.m.
- If the workday is also a rest day or holiday, the day premium applies to the regular portion, and the overtime premium stacks on top.
Why the 8-hour calculator does not fit
Our calculator assumes a standard eight-hour workday. If you enter a 10-hour CWW shift, it will treat the last two hours as overtime, which is not correct for a valid CWW. The eight-hour calculator is not a valid CWW calculator unless the normal hours threshold is adjusted. For a compressed workweek, use the calculator only for the hours beyond the CWW threshold.
A future version may add a configurable “normal hours per day” setting. For now, the calculator is intentionally explicit about its assumption so it does not silently produce a wrong number.
Night shift and CWW
The night differential boundary does not change under a compressed workweek. Only hours actually worked between 10 p.m. and 6 a.m. earn the 10% premium. The CWW changes the overtime threshold, not the night window.
Holidays under a CWW
Holiday pay still depends on the day type and whether the employee worked. If a regular holiday falls on a compressed workday, the holiday premium applies to the hours worked, and any hours beyond the CWW threshold get the overtime premium on top. If the holiday falls on the additional non-working day, the unworked holiday rules and company policy determine the pay.
What to ask your employer
- Is there a written compressed workweek agreement?
- What is the normal number of hours per day under the arrangement?
- Which day is the additional non-working day, and is it the rest day?
- How are holidays and night differential computed under the arrangement?
- Which issuance governs the arrangement?
- Has the arrangement been reported or communicated to DOLE under the applicable issuance?
Bottom line
Overtime is work beyond the normal workday, and the normal workday can be changed by a valid flexible work arrangement. Do not assume that every hour beyond eight is overtime, and do not assume that every 10-hour schedule is a lawful CWW. The facts and the paperwork matter.
For the standard rules, read the overtime computation guide. For the legal basis and current advisories, see sources.