Sources
Last updated 2026-10-27
Every overtime rule pack and calculator on Shiftfigure is built from the primary official texts below: the U.S. Code and the Code of Federal Regulations (eCFR), the California Labor Code and IWC wage orders, and the official holiday lists. Department of Labor and DLSE fact sheets are listed as supporting guidance. Each link was opened and checked against the rule it backs on the date shown at the end. The same list appears on each tool page under “How this tool works”, and the Shiftfigure apps use it too.
The results are estimates under the rule you pick, not legal, tax or payroll advice. If a source changes or a link breaks, write to support@shiftfigure.com.
US federal: 40-hour workweek (FLSA)
- 29 U.S.C. § 207 (FLSA § 7): overtime after 40 hours a week; § 7(j) hospitals (8 and 80); § 7(k) fire and police work periods
- 29 CFR Part 778: overtime compensation (regular rate, workweek)
- 29 CFR § 778.105: the workweek is a fixed and regularly recurring period of 168 hours
- 29 CFR § 778.207(b): shift differentials are part of the regular rate
- U.S. Department of Labor, Fact Sheet #23: overtime pay requirements of the FLSA (supporting guidance)
California: daily, weekly and seventh-day overtime
- California Labor Code § 510: daily overtime over 8 hours, double time over 12, seventh day
- California Labor Code § 500: workday, workweek and alternative workweek schedule defined
- 29 U.S.C. § 207 (FLSA § 7): overtime after 40 hours a week; § 7(j) hospitals (8 and 80); § 7(k) fire and police work periods
- California DLSE: overtime FAQ (supporting guidance)
California alternative workweek (10-hour days)
- California Labor Code § 511: alternative workweek schedules (up to 10-hour days without overtime)
- California Labor Code § 500: workday, workweek and alternative workweek schedule defined
- California Labor Code § 510: daily overtime over 8 hours, double time over 12, seventh day
- IWC Wage Order 4 (professional, technical, clerical), section 3(B): alternative workweek schedules
- California DLSE: overtime exceptions FAQ (alternative workweeks) (supporting guidance)
California health care alternative workweek (12-hour days)
- IWC Wage Order 5 (public housekeeping incl. health care), section 3(B)(8): 12-hour health care alternative workweek
- California Labor Code § 511: alternative workweek schedules (up to 10-hour days without overtime)
- California DLSE: overtime exceptions FAQ (alternative workweeks) (supporting guidance)
FLSA 7(k): fire protection
- 29 U.S.C. § 207 (FLSA § 7): overtime after 40 hours a week; § 7(j) hospitals (8 and 80); § 7(k) fire and police work periods
- 29 CFR § 553.230: maximum hours table, 212 h fire / 171 h police per 28 days and shorter periods
- 29 CFR § 553.224: the 7(k) work period (7 to 28 consecutive days)
- 29 CFR § 553.222: sleep time, excludable only on tours of duty of more than 24 hours
- 29 U.S.C. § 213(b)(20) (FLSA § 13(b)(20)): fire and police agencies with fewer than 5 such employees
- U.S. Department of Labor, Fact Sheet #8: law enforcement and fire protection employees (supporting guidance)
FLSA 7(k): law enforcement
- 29 U.S.C. § 207 (FLSA § 7): overtime after 40 hours a week; § 7(j) hospitals (8 and 80); § 7(k) fire and police work periods
- 29 CFR § 553.230: maximum hours table, 212 h fire / 171 h police per 28 days and shorter periods
- 29 CFR § 553.224: the 7(k) work period (7 to 28 consecutive days)
- 29 U.S.C. § 213(b)(20) (FLSA § 13(b)(20)): fire and police agencies with fewer than 5 such employees
- U.S. Department of Labor, Fact Sheet #8: law enforcement and fire protection employees (supporting guidance)
FLSA 7(j): hospitals and residential care (8 and 80)
- 29 U.S.C. § 207 (FLSA § 7): overtime after 40 hours a week; § 7(j) hospitals (8 and 80); § 7(k) fire and police work periods
- 29 CFR § 778.601: hospitals and residential care, 14-day period (8 and 80)
- U.S. Department of Labor, Fact Sheet #54: health care industry and overtime (8 and 80) (supporting guidance)
Hours worked, rounding, records and clock changes
- 29 CFR Part 785: hours worked (all time the employee is required or allowed to work)
- 15 U.S.C. § 260a: daylight saving time from the second Sunday of March to the first Sunday of November
- 29 CFR § 785.48: rounding of starting and stopping times
- 29 CFR § 516.5: payroll records kept for 3 years
- 29 CFR § 516.6: time cards and wage rate tables kept for 2 years
Shift differentials
- 29 CFR § 778.207(b): shift differentials are part of the regular rate
- 29 U.S.C. § 207 (FLSA § 7): overtime after 40 hours a week; § 7(j) hospitals (8 and 80); § 7(k) fire and police work periods
Public holidays and holiday pay (US, UK, Canada, Australia)
- U.S. Office of Personnel Management: federal holidays (5 U.S.C. § 6103)
- 29 CFR § 778.218: pay for holidays and other days when no work is performed
- 29 CFR § 778.219: pay for foregoing holidays and vacations
- 29 CFR § 778.203: premium pay for work on Saturdays, Sundays and holidays
- GOV.UK: UK bank holidays (England and Wales, Scotland, Northern Ireland)
- GOV.UK: holiday entitlement and bank holidays (no statutory right to time off or extra pay)
- Canada Labour Code, s. 166: general holidays (federally regulated employers)
- Canada Labour Code, s. 196: holiday pay
- Fair Work Ombudsman (Australia): public holidays by state and territory
Last checked:
German pages (§ 3b EStG, Arbeitszeitgesetz) list their sources on the German sources page.