How to Calculate a Time Card With Breaks
A time card records when you clocked in and out each day. To turn it into hours worked and pay, you deduct unpaid breaks, total each day, then add the days into a weekly figure. This guide shows the full process with a worked example.
Clock-in and clock-out
A time card is built from pairs of times: when you clocked in and when you clocked out for each shift. The span between the two is the gross time you were on the clock, before breaks. For a daytime shift the span is simply clock-out minus clock-in.
Use a 24-hour format or clearly mark AM and PM. A time card with bare 7:00 entries is ambiguous — it could be morning or evening — and that ambiguity leads to wrong totals.
Unpaid-break deduction
After finding the gross span, subtract any unpaid break to get net work time. The break is usually entered in minutes. A 30-minute unpaid lunch removes 30 minutes from the day’s total.
Whether a break is paid or unpaid depends on your employer and your local rules. Do not assume a particular break is unpaid — confirm it against your employment terms. Paid rest breaks generally stay in your work time and are not subtracted.
Daily work time = (clock-out − clock-in) − unpaid break
Daily totals
Work out the net work time for each day separately. Keeping a per-day breakdown lets you check each day against your time card before totalling the week, which is much easier than debugging a wrong weekly total after the fact.
If a shift crosses midnight, treat the clock-out as occurring on the following day — add 24 hours to the clock-out before subtracting when clock-out is earlier than or equal to clock-in.
Weekly totals
Add the daily net work times together for your weekly total. It is safest to add in minutes and convert once at the end, so rounding does not accumulate across days. The weekly total is what you multiply by your hourly rate to estimate gross pay.
If your employer applies a weekly overtime threshold, split the weekly total into regular and overtime hours after totalling, not day by day.
Weekly total = sum of daily work times Estimated gross pay = weekly total (decimal hours) × hourly rate
Overnight shifts
Night shifts appear on time cards the same way daytime shifts do, but the clock-out is on the following calendar day. The same rule applies: when clock-out is less than or equal to clock-in, add 24 hours to the clock-out. The WorkHoursHQ Time Card Calculator handles this automatically.
Worked example
A weekly time card, Monday to Friday, clock-in 08:30 and clock-out 17:00 with a 30-minute unpaid lunch each day. Each day is 8 hours 30 minutes minus 30 minutes, so 8 hours 00 minutes. Across 5 days the weekly total is 40 hours 00 minutes (40.00 decimal hours). At $22 per hour, estimated gross pay is 40.00 × $22 = $880.00.
Common time-card mistakes
Forgetting to subtract an unpaid lunch is the most frequent error — it inflates the total by the break length every day. Another is misreading a 12-hour time without AM/PM. A third is subtracting a paid rest break that should count as work time. Always check whether each break is paid or unpaid before deducting it.
Finally, watch for overnight shifts recorded with a clock-out that looks “earlier” than the clock-in. That is not a data entry error — it is a shift crossing midnight.