Billable Hours vs Working Hours: What's the Difference?

Billable hours and working hours are often confused, especially by freelancers, consultants and small business owners. Although the two terms are related, they do not always mean the same thing.

Understanding the difference can help you track your time more accurately, separate client work from other tasks and create better time records. A free working hours tracker can also make these calculations easier.

What Are Working Hours?

Working hours are the total amount of time you spend performing work during a specific period.

For example, if you work from 08:00 to 17:00 and take a one-hour lunch break, your total time at work is 9 hours, while your net working time is 8 hours.

Working hours can include both activities that generate direct client revenue and activities that are necessary for running your work or business.

What Are Billable Hours?

Billable hours are the portion of your working time that can be charged to a client according to your agreement or contract.

For example, if you spend five hours designing a website for a client and the project is charged by the hour, those five hours may be billable.

However, time spent answering general emails, doing administration or marketing your business may not necessarily be billable.

Billable Hours vs Working Hours

The easiest way to understand the difference is to think of billable hours as a part of your total working hours.

Working hours: All the time you spend working.
Billable hours: Working time that can be charged to a client.
Non-billable hours: Working time that is not directly charged to a client.

For example, you may work 8 hours in one day but have only 6 billable hours.

8 hours total working time = 6 billable hours + 2 non-billable hours

Example of Billable vs Working Hours

Imagine a freelancer starts working at 09:00 and finishes at 17:00. They take a one-hour lunch break.

The calculation is:

8 hours total time − 1 hour break = 7 hours net working time

During those 7 hours, the freelancer spends:

5 hours on client projects
1 hour answering business emails
1 hour on administration

In this example, the freelancer has 7 working hours, but only 5 hours may be billable, depending on the client agreement.

Why Is the Difference Important?

Knowing the difference between billable and working hours can help you understand how your working day is actually being used.

This is particularly important for freelancers and businesses that charge clients based on time.

Tracking both types of time can help you:

Keep more accurate client records
Prepare time-based invoices
Understand project costs
Identify non-billable activities
Improve project estimates
Understand your effective hourly earnings

How to Calculate Working Hours

The basic working time calculation is:

Net Working Time = End Time − Start Time − Break Time

For example, working from 08:30 to 17:30 with a one-hour break gives you:

9 hours − 1 hour = 8 hours net working time

How to Calculate Billable Hours

After calculating your net working time, separate the hours that are chargeable to clients.

For example:

Net working time: 8 hours
Client project A: 4 hours
Client project B: 2 hours
Administration: 2 hours

Your total working time is 8 hours, while your billable time may be 6 hours.

Common Mistakes When Tracking Billable Hours

One of the biggest mistakes is assuming that every hour worked is automatically billable.

Track Working Hours and Billable Time for Free

You do not need expensive time-tracking software for basic working hour calculations.

Our free Working Hours Tracker lets you record start times, end times and breaks and calculate your net working time.

The tool is free to use and can be useful for freelancers, employees, consultants and small businesses that want a simple way to organize their working time.

You can use the free Working Hours Tracker to make daily time calculations easier and maintain more consistent work records.

How Freelancers Can Track Billable Hours More Effectively

A simple routine can make billable time tracking much easier.

Record the client you are working for.
Record the project or task.
Start tracking when the work begins.
Record breaks separately.
Stop tracking when the task ends.
Identify whether the time is billable.
Review your records regularly.

This method can help prevent forgotten hours and make it easier to understand how much time each client requires.

Does More Billable Time Mean More Productivity?

Not necessarily. A high number of billable hours can mean that you are spending more time on client work, but productivity also depends on the results achieved during that time.

Tracking both total working hours and billable hours gives you a more complete picture of your workload.

Use a Free Tool to Simplify Time Tracking

Manually calculating working hours every day can become repetitive. A simple online tool can handle the time calculations while you focus on your work.

If you need an easy way to record your daily working time, try the free Working Hours Tracker. It can help you calculate net working hours and maintain organized time records.

Frequently Asked Questions

What is the difference between billable hours and working hours?

Working hours include the time you spend working, while billable hours are the portion of that time that can be charged to a client.

Can all working hours be billable?

Not necessarily. Whether an activity is billable depends on the work performed and the agreement with the client.

How do I calculate billable hours?

First calculate your net working time after breaks, then identify the portion of that time that is chargeable to the client.

Is there a free tool for tracking working hours?

Yes. The free Working Hours Tracker can help you record start times, end times and breaks and calculate net working time.

Should freelancers track billable and non-billable hours separately?

Yes. Separating the two can help freelancers understand how much time is spent directly on client work compared with business administration and other activities.