How To Count Overtime Hours On A Weekly Timesheet
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The Core Overtime Counting Formula
Formula: OT Hours = MAX(0, Total Hours Worked in Workweek − 40)
Under federal FLSA, anything over 40 hours worked in a defined workweek is overtime, paid at 1.5× your regular rate. A workweek is a fixed, recurring 168-hour period — seven consecutive 24-hour days. Your employer picks it (Monday–Sunday, Wednesday–Tuesday, whatever), and once set, it stays fixed.
Important: “hours worked” means actual working time, not scheduled time, and not time on the clock for unpaid breaks.
Step-by-Step: Counting OT Hours on a Real Timesheet
Let’s say your workweek runs Monday through Sunday, and your timesheet for the week looks like this:
| Day | Hours Worked |
|---|---|
| Monday | 9 |
| Tuesday | 8 |
| Wednesday | 10 |
| Thursday | 8 |
| Friday | 9 |
| Saturday | 0 |
| Sunday | 0 |
- Total the hours. 9 + 8 + 10 + 8 + 9 = 44 hours worked.
- Subtract 40. 44 − 40 = 4 overtime hours.
- Split for payroll. 40 regular + 4 OT.
That’s the federal answer. The time-card-calculator does this tally and split automatically once you punch in the daily hours, which beats adding by hand when you’re tired on a Sunday night.
If you worked those same 44 hours but spread differently — say 11 hours Monday and 11 Tuesday, then 11 Wednesday, then nothing else — the federal OT count is still 4 hours. Daily distribution doesn’t matter federally. (It does in California. More on that below.)
2026 Real Case: Carla’s Variable Schedule
Carla works as a dispatcher in Phoenix, paid $19/hr, workweek Monday–Sunday. Her hours in mid-July 2026 were erratic because of staffing gaps:
- Mon 7.5, Tue 10, Wed 6, Thu 9.5, Fri 8, Sat 4 = 45 hours total
- Overtime hours: 45 − 40 = 5 OT hours
Her gross for the week: 40 × $19 + 5 × $19 × 1.5 = $760 + $142.50 = $902.50.
The catch? She’d been logging only the “extra” hours over her scheduled 8/day as OT, which would have given her just 3 OT hours instead of 5. She’d have lost $57 that week without realizing it. Once she started totaling the whole workweek first and then subtracting 40, the math lined up with payroll. Small change weekly, big difference over a year.
Timesheet With a Mid-Day Unpaid Break
Unpaid meal breaks don’t count as hours worked, so they come out before the 40-hour test. Here’s a timesheet with 30-minute unpaid lunches built in.
| Day | Clocked In | Unpaid Lunch | Net Hours Worked |
|---|---|---|---|
| Monday | 9.0 | 0.5 | 8.5 |
| Tuesday | 9.0 | 0.5 | 8.5 |
| Wednesday | 10.5 | 0.5 | 10.0 |
| Thursday | 9.0 | 0.5 | 8.5 |
| Friday | 9.0 | 0.5 | 8.5 |
| Total | 46.5 | 2.5 | 44.0 |
The 40-hour overtime trigger applies to the 44.0 net hours worked, not the 46.5 on the clock. So overtime = 4 hours. If your employer counts the clocked-in time instead of net hours worked, they’re overpaying OT — but more commonly, employers mistakenly deduct paid breaks too, which undercounts hours worked. The work-hours-calculator handles the break deduction cleanly.
So what does that mean for you? Always separate “clocked-in time” from “hours worked” before counting OT. Paid 15-minute rest breaks stay in; unpaid 30+ minute meal breaks come out.
Special Cases That Trip People Up
- Two jobs, same employer. If you work for the same employer at two locations, the hours combine for the 40-hour test. Working 25 hrs at Job A and 25 hrs at Job B for the same company = 50 hours, with 10 of them as OT.
- On-call time. On-call hours count as hours worked if you’re “engaged to wait” (restricted, can’t use the time freely). If you’re just waiting at home to be called, it usually doesn’t count.
- Pre-shift setup. Time spent setting up before your shift, if it’s required and integral to the job, counts as hours worked. Donning protective gear is a classic FLSA gray area that often should be paid.
- Training and travel. Mandatory training counts. Ordinary commute doesn’t. Travel between work sites during the day counts.
For the underlying workweek definition and why a 168-hour fixed window matters, the FLSA 168-hour workweek rule lays it out in detail. And the step-by-step timesheet total example covers the decimal conversion if your timesheet uses clock times like 8:45 AM.
State Variations: When Daily Hours Matter
If you’re in California, the counting changes. California stacks daily overtime on top of the weekly 40-hour rule:
- 1.5× for hours over 8 in a day
- 2× for hours over 12 in a day
- 1.5× for the first 8 hours on a 7th consecutive day, 2× after 8
So in California, an 11-hour day already has 3 OT hours — even if your weekly total is under 40. That’s a completely different counting exercise, and it’s why a good overtime calculator lets you pick your state before doing the math.
Frequently Asked Questions
How do I count overtime hours on a weekly timesheet?
Add up all hours worked within your employer’s fixed workweek. Any hours over 40 are overtime hours under federal FLSA. For example, 9+8+10+8+9 = 44 hours, so 4 hours of overtime.
Does overtime reset every week or every pay period?
Every fixed workweek, which is a 168-hour period your employer defines. It does not reset with the pay period. A biweekly paycheck covers two separate workweeks, each with its own 40-hour overtime threshold.
Do unpaid lunch breaks count toward overtime hours?
No. Unpaid meal breaks of 30 minutes or more, where you’re completely relieved of duty, do not count as hours worked. Only paid time counts toward the 40-hour overtime trigger.
What if my workweek crosses two pay periods?
Overtime is still measured by the workweek, not the pay period. Hours from both pay periods that fall inside the same workweek are added together, and anything over 40 is overtime.
The Bottom Line
Counting overtime hours is just: total hours worked in the fixed workweek, minus 40, with unpaid meal breaks pulled out first. The mistakes come from confusing clocked-in time with hours worked, or from applying daily rules in a weekly-only state. Run your weekly entries through the time-card-calculator every pay period so the OT split is right before payroll processes it.