Turn Working Days into a Monthly Capacity Budget

By Intious · Updated September 7, 2026

Quick answer

Multiply working days by scheduled paid hours, then subtract separately identified unavailable time. Keep scheduled capacity distinct from productive capacity.

Choose a consistent baseline

Monthly capacity starts with a working calendar and an hours-per-day assumption. Use paid scheduled hours if paid time is your planning baseline; exclude an unpaid meal period from those hours. Do not label the result productive time yet. Meetings, training, leave and absence may reduce service capacity even when they are paid, and each needs a clear treatment.

Calculate capacity per person first

Suppose a planning month has 22 Monday–Friday dates and one full-day closure. Twenty-one workdays at eight paid hours gives 168 scheduled hours per full-time person. A five-person team has 840 scheduled hours only if all five follow that schedule throughout the period. A new starter, a part-time pattern or a different location calendar needs its own calculation.

Avoid counting the same loss twice

If an individual has 16 hours of planned leave, subtract those hours once. If you then apply a shrinkage percentage that already includes leave, the same loss appears twice. One defensible method is to start with scheduled hours and apply one comprehensive shrinkage estimate. Another is to deduct known losses and apply a residual estimate for the remaining categories. State which approach you chose.

Connect the budget to staffing decisions

A monthly total helps compare workload with supply, but timing still matters. A team can have enough monthly hours while leaving Friday afternoons uncovered. Use the FTE calculator for a consistent capacity ratio, then inspect a daily coverage plan. Preserve the date list and your separate adjustments so a change in a closure or leave assumption can be traced without rebuilding the whole budget.

Try it with your numbers

Count working dates with custom weekdays and closures, then export a daily breakdown.

Business Days & Work Hours Calculator

Official guidance

U.S. Department of Labor: hours worked · U.S. Department of Labor: regular rate of pay

Next steps

Calculation limitations · Report a correction

Frequently asked questions

Should a paid holiday count as productive capacity?

Only if work will actually be performed. Paid payroll hours and available service hours answer different questions; keep both totals separately if needed.

Can I divide monthly hours by 160 for FTE?

Use the baseline appropriate to the same month and definition. A fixed 160-hour denominator can misstate a month with a different working-day count.

What changes when someone starts halfway through the month?

Calculate that person’s dates from the actual start date. Multiplying the full-month capacity by total headcount would overstate the hours available.

Check the assumptions against the Business Days & Work Hours Calculator and keep the inputs alongside your result. For a discrepancy, send an anonymous worked example rather than private employee records.

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