Monthly Timesheet Calculator

Monthly And Twice-A-Month Pay Periods

A monthly timesheet runs from the 1st to the last day of the month. A twice-a-month, or semi-monthly, timesheet has two periods: the 1st to the 15th, and the 16th to the end of the month.

Pick the one your employer uses in Settings, under "Pay period". The calculator then shows every day of that period and adds the hours up as you type.

Months have 28 to 31 days, so the hours change from one period to the next. A full-time worker on a 40 hour week averages 173.33 hours a month, but a single month can land above or below that.

A Worked Example: October 2026

Take a worker who is on the clock every weekday in October 2026, from 8:00 AM to 5:00 PM with a 30 minute lunch. That is 8 h 30 m a day, and 22 days, so 187 h for the month.

At $20.00 an hour, the month pays $3,840.00. That includes 10 h of overtime, paid at time and a half, because most workweeks come to 42 h 30 m.

The two halves add up exactly to the month.

How Many Work Hours Are In A Month?

A full-time worker on 40 hours a week averages 173.33 hours a month. That is 2,080 hours a year divided by 12 months.

A real month depends on its weekdays. Count the weekdays and multiply by 8 for a standard day. This table does that for 2027 and does not take off holidays.

Take off 8 hours for each paid holiday that falls on a weekday.

The year adds up to 261 weekdays, or 2088 hours, before holidays and time off.

How Overtime Works When A Week Is Split In Two

Overtime is always counted for each workweek, not for each pay period. When a pay period ends in the middle of a week, that week belongs partly to one period and partly to the next.

In the example, the week of October 12 runs Monday to Sunday. The first four days fall in the first period and Friday the 16th falls in the second. The worker reaches 40 hours part way through Friday, so 2 h 30 m of overtime is paid in the second period.

The calculator handles this for you. It looks at the whole workweek, including the days outside the pay period. Then each overtime hour is paid in the period of the day it was worked. If you have not entered the days outside the period, the overtime can be missed, so fill in the neighbouring days too.

Pay Periods In A Year

The number of pay periods decides how much each paycheck is. It also decides how many hours a pay period covers.

Hours at 40 a week are averages. A real period depends on how many working days it contains.

A twice-a-month employer pays on fixed dates, such as the 15th and the last day of the month. A biweekly employer pays every other week, so some months have three paydays.

If you are paid every two weeks, use the biweekly timesheet calculator.

How To Use The Monthly Timesheet

1. Check that Settings shows "Monthly" or "Twice a month", whichever matches your pay slip.
2. Type your start and end times for each day, and your unpaid lunch in minutes.
3. Add paid time off, holiday or sick hours by choosing the day type. They are paid but do not count as hours worked.
4. Read the totals. Hours, overtime and gross pay are shown for the period on screen, with the working underneath.
5. Use the arrows or "Past periods" to move to the previous month, and "Copy last period" to reuse a schedule.

Monthly Salaries And Monthly Hours

If you are paid a salary, your monthly pay does not depend on the hours in the month. The calculator is still useful, because it shows the hours you actually worked and the hourly rate that works out.

For example, a salary of $4,000 a month and 187 h worked is $21.39 an hour for that month. Whether overtime is owed on top of a salary depends on your job and your state. Check with your employer or the Department of Labor.

For a yearly salary, the salary to hourly calculator turns it into an hourly rate using your weekly hours.

You can also try the salary to hourly calculator.

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