# Billable Hours Calculator

> Scheduled hours less leave, holidays and non-billable work.

Page: https://freecalculator.tech/tools/billable-hours-calculator
Last reviewed: 2026-09-16

## Formula

Scheduled hours = Weeks × Hours per week; Available hours = Scheduled − Leave − Holidays; Billable hours = Available − Training − Internal hours

- Scheduled hours = Weeks × Hours per week; Available hours = Scheduled − Leave − Holidays; Billable hours = Available − Training − Internal hours.
- Inputs used: Weeks in the year worked, Scheduled hours per week, Annual leave hours, Public holiday hours, Training hours, Internal and admin hours.
- Edge handling: Weeks in the year worked is required.; Weeks in the year worked cannot be negative.; Weeks in the year worked must be no more than 1000000000000.; Scheduled hours per week is required.; Scheduled hours per week cannot be negative..

## Inputs

- Weeks in the year worked
- Scheduled hours per week
- Annual leave hours
- Public holiday hours
- Training hours
- Internal and admin hours

## Worked example: Full-time consultant with leave, holidays and internal time

Every deduction is entered, so no standard working year is assumed.
1. Start with Weeks in the year worked: 52, Scheduled hours per week: 40, Annual leave hours: 160, Public holiday hours: 80, Training hours: 40, Internal and admin hours: 200.
2. Apply the method: Scheduled hours = Weeks × Hours per week; Available hours = Scheduled − Leave − Holidays; Billable hours = Available − Training − Internal hours.
3. Every deduction is entered, so no standard working year is assumed.

## Common questions

### Where does this formula come from?

Institute of Management Accountants, Statements on Management Accounting — measuring the cost of capacity (practical capacity). See the source link on this page.

### What kind of calculation is this?

Scheduled time less time away and less non-billable work gives the hours that can be billed. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.

### What are its limits?

Capacity is not demand: available hours will only be billed if there is work to do. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.

### How do I use the Billable Hours Calculator?

Enter the required values for Weeks in the year worked, Scheduled hours per week, Annual leave hours, Public holiday hours, Training hours, and the other fields shown. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.

### What formula does the Billable Hours Calculator use?

Scheduled hours = Weeks × Hours per week; Available hours = Scheduled − Leave − Holidays; Billable hours = Available − Training − Internal hours The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.

### Can the Billable Hours Calculator be used for exact decisions?

Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.

## Limitations and assumptions

- Inputs outside the supported range are rejected rather than forced into a result.
- The result depends on the values you enter for this billable hours calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.

## Sources

- IMA — https://www.imanet.org/insights-and-trends/strategic-cost-management

## Cite this page

- APA: Free Calculator. (2026, September 16). Billable Hours Calculator. https://freecalculator.tech/tools/billable-hours-calculator
- MLA: "Billable Hours Calculator." Free Calculator, 16 Sept. 2026, https://freecalculator.tech/tools/billable-hours-calculator.
- Link: Billable Hours Calculator — Free Calculator, https://freecalculator.tech/tools/billable-hours-calculator