Billable Utilization: How to Calculate It and What Rate to Aim For

Billable utilization is the share of your available working hours that you spend on work a client pays for. Divide billable hours by available hours, multiply by 100, and you have your rate. If you are a freelance project manager, that one number tells you whether your calendar can support your income, and how much room you have left for pitching, admin and rest.

This guide shows the formula, a worked example for one person and for a team, what counts as billable, what benchmarks exist, and how to use the number to run a solo practice.

TL;DR

• Billable utilization = billable hours ÷ available hours × 100. It measures client-paid time only.
• Use realistic available hours (after holidays, time off and planned leave), not a theoretical 2,080-hour year.
• Most service businesses treat 70% to 80% as good. For solo freelancers, a working range of roughly 55% to 80% is more realistic, because you also run sales and admin yourself.
• Chasing 100% leaves no slack for pitching, scoping or a sick day. Track non-billable time so you can see where it goes.
• Utilization measures effort, not profit. Pair it with your effective hourly rate.

Table of Contents

• What billable utilization means
• How to calculate billable utilization
• What counts as billable and non-billable
• What is a good billable utilization rate?
• Is 200 billable hours a month a lot?
• Using utilization to plan your freelance practice
• Our perspective
• Where The Freelance PM Club fits
• Common mistakes when measuring billable utilization
• FAQ
• Sources

What billable utilization means

Billable utilization is the percentage of a professional’s available working hours spent on revenue-generating client work, as one time-tracking guide for agencies puts it. It differs from overall resource utilization, which counts all productive hours, including internal projects, training and administration.

Three terms often get mixed up:

• Billable hours are an absolute count: the hours you can invoice.
• Billable utilization is a ratio: those hours as a share of the hours you could have worked.
• Total (or productive) utilization is a wider ratio. Ruddr’s glossary defines total utilization as all hours worked, internal and client, divided by available hours. Clockify’s guide describes a related productive version that adds non-billable work such as mentoring, business development, research and networking.

The last two answer different questions. Productive utilization tells you whether you are busy. Billable utilization tells you whether you are busy in a way that pays. For a freelancer, the second is the one that shows up in your bank account.

How to calculate billable utilization

The general form is (hours in the chosen numerator ÷ hours in the chosen denominator) × 100, as the Ruddr glossary explains. For billable utilization, the numerator is billable hours and the denominator is available hours. The Operating help center describes its default the same way: billable client work divided by working hours.

Billable utilization (%) = billable hours ÷ available hours × 100

A simple example

A published example from Asana’s utilization guide has someone bill 34 hours in a 40-hour week. That is 34 ÷ 40 = 0.85, or 85%.

Now a freelancer version. Say you invoiced 96 hours in a month with 160 available working hours:

1. Billable hours: 96
2. Available hours: 160
3. 96 ÷ 160 = 0.60
4. Billable utilization: 60%

The other 64 hours went to proposals, calls with prospects, invoicing, learning and the occasional gap between projects. That is normal, and you will see below why a 60% month is not a bad month.

Calculating the average for a team or a period

If you run a small bench of subcontractors, or you want a quarter-long average for yourself, do not average the percentages. Add up the hours first. Everhour’s average utilization calculator gives an example: three people bill 118, 106 and 88 hours, which totals 312. Each has 160 available hours, so the group has 3 × 160 = 480. Then 312 ÷ 480 × 100 = 65%.

That is a capacity-weighted average. Averaging each person’s percentage gives an unweighted average, which can drift from the truth when people have different available hours, such as a part-timer next to a full-timer. For a single freelancer over a quarter, the same logic applies: sum three months of billable hours, sum three months of available hours, then divide.

Get the denominator right

Most bad utilization numbers come from the denominator. Kantata’s benchmarks article says total available hours should reflect actual working capacity, after time off, public holidays and planned leave, rather than a theoretical 40-hour week. Birdview’s guide warns that using an inflated denominator such as 2,080 annual hours artificially suppresses the rate and distorts staffing and profitability decisions.

A practical way to build your own number:

1. Start with the weeks you plan to work in the year (52 minus vacation, holidays and a sick-day buffer).
2. Multiply by the hours per week you actually intend to work, not the hours you wish you worked.
3. Divide by 12 for a monthly figure, or use the month’s calendar directly.

Someone planning 46 working weeks at 40 hours has 1,840 available hours a year, about 153 a month. Measuring against 2,080 would make the same performance look worse by more than 11 points, and you would draw the wrong conclusion.

What counts as billable and non-billable

Billable time is work tied directly to a client deliverable. TimeTac’s explainer lists project delivery, client meetings, revisions and research tied to a client project. Scoro’s guide describes non-billable time as company meetings, training and business development.

For a freelance PM, a useful split looks like this:

That last row matters. Time you work for a client but never invoice does not count toward billable hours, so scope creep quietly lowers your utilization and your effective rate at the same time. Our 5-step scope creep control guide covers how to catch it before it eats your week.

Non-billable does not mean wasted. TrackingTime’s guide notes that non-billable time supports business development, hiring and onboarding, training and process improvements, and tracking it shows how much time it consumes. Your goal is to know the cost of it and keep it deliberate.

What is a good billable utilization rate?

The honest answer is that it depends on your role, your business model and how much of the selling you do yourself.

Service businesses: Asana reports a 70% to 80% rate as good for most service-based businesses, and also says a higher percentage is not automatically ideal, since people need time for internal work.

Professional services firms: According to the 2026 SPI Professional Services Maturity Benchmark, as summarized by a development firm, average billable utilization across more than 500 benchmarked organizations fell to 66.4% in 2025, the lowest in the benchmark’s 19-year history. Deltek’s write-up of the same benchmark puts the target for high-performing, optimized firms at 80% or higher.

Solo freelancers: One freelance utilization guide suggests a reasonable working target of 55% to 80%, noting that a rate near 100% leaves no slack for pitching, administration or time off.

The firm-level numbers come from organizations with sales teams, operations staff and managers who carry the non-billable load. You carry all of it. So a freelancer at 65% is not underperforming against a firm at 66.4%; you are in the same neighborhood while also running your own business development.

A rough way to set your own target

Work backward from income:

1. Decide the annual income you need.
2. Divide by your hourly or day rate to get the billable hours required.
3. Divide by your realistic available hours.

If you need $120,000 and charge $100 an hour, you need 1,200 billable hours. Against 1,840 available hours, that is 65%. If the result is above 80%, the fix is usually the rate, not more hours. Our guide to value-based pricing for freelance PMs walks through testing a price tied to an outcome rather than time.

Is 200 billable hours a month a lot?

Yes, for most people. It depends on the available hours behind it, so run the formula:

• A typical full-time month of about 160 available hours: 200 billable hours would be 125% and is not possible without overtime.
• A month of 173 hours (2,080 annual hours spread over 12 months): 200 would still be about 116%.
• Compare with a law-firm guide that turns an annual target into monthly figures: 1,800 billable hours a year is about 150 a month, and 2,000 is about 167.

So 200 billable hours in a month means long weeks, probably 50 or more hours of work with almost nothing non-billable. A sprint month like that can happen. As a standing pace it leaves nothing for the next client, and mistakes tend to rise with fatigue. If a client or engagement lead promises a “100% utilization” engagement, treat that as a capacity statement: it should be priced and scheduled with that in mind, and it should not erase your time to find the next contract.

Using utilization to plan your freelance practice

A number is only useful if it changes a decision. These are the ones it should change.

Capacity planning

Multiply your available hours by your target rate to get billable capacity. At 153 available hours a month and a 70% target, you have about 107 billable hours to sell. If a new client wants 40 hours a month and you already have 80 booked, you know the answer before the call.

Protecting your pipeline

If you hit 90% for three straight months, your pitching probably stopped. Within a month or two of the engagement ending, your pipeline is empty. Hold a fixed block, such as four hours a week, for outreach and conversations. Our two-week plan for finding freelance PM work lays out a routine for this.

Spotting leaks

Keep time logs by client and by category. When utilization looks fine but income does not, the cause is usually one of the usual suspects: scope creep, unbilled revisions, discounts or slow invoicing. Deltek lists scope creep, write-offs, missed billing and weak contract controls as sources of revenue leakage.

Knowing what the number does not say

Billable utilization is a lagging indicator. One analysis from Servantium argues that booked utilization alone can hide engagement drift and poor realized margin. For you, that means a full calendar on a badly priced contract looks healthy and is not. Check effective hourly rate (revenue divided by all hours worked on that client, billable or not) next to utilization.

A monthly review in 15 minutes

1. Total your billable hours and your available hours for the month.
2. Calculate utilization and compare it with your target range.
3. Add up non-billable hours by category: sales, admin, learning, unbilled client work.
4. Divide revenue by total hours worked for each client to get effective rates.
5. Pick one change for next month: raise a rate, tighten a scope, or block pitching time.

Once a quarter, do the weighted average from earlier across three months so one holiday does not mislead you.

Our perspective

We built The Freelance PM Club around a simple observation: independent project managers rarely struggle because they cannot manage projects. They struggle because running a solo practice has three jobs in it: delivering, finding the next client and building skills. Utilization is the number that shows how those three jobs compete for the same hours.

That is why we do not tell members to chase 100%. A calendar packed with billable work looks like success until a contract ends and nothing is lined up. We would rather see you hold a healthy range, use the freed hours deliberately, and raise your rate as your positioning sharpens.

The Club is designed for exactly that loop. Curated job listings and a job board keep your pipeline fed so pitching takes less of your week. Courses and templates cut the time you spend building things from scratch, and coaching helps you decide which niche, rate and engagement type deserve your billable hours. The community lets you ask others what their month looks like before you decide your own is normal.

Track your hours for one month, calculate the number honestly, and treat it as information. Then decide what to change.

Ashanti

Where The Freelance PM Club fits

If your utilization is low because work is hard to find, the quickest lever is access to better-matched opportunities. The Freelance PM Club offers a job board for freelance project managers, courses, a template library, a networking community and coaching. Membership plans are published at thefreelancepmclub.com/subscriptions: Job Board Access is $5 per month, Freelancer Pro is $10 per month and Freelancer Elite is $20 per month.

If your issue is rate, positioning or the move from employment to independent work, our coaching is built for that conversation. You can also read how to pick a niche with copy-ready positioning to make higher-value hours easier to sell.

Common mistakes when measuring billable utilization

• Using 2,080 hours as the denominator for everyone. It ignores holidays and leave, so your rate looks lower than it is.
• Mixing definitions. If you compare your billable rate with a benchmark that counts productive non-billable hours, you will draw the wrong conclusion. Check what the numerator includes.
• Logging time after the fact from memory. Small tasks vanish. Log daily, even roughly.
• Averaging percentages across months of different lengths. Sum the hours and divide once.
• Treating the target as fixed. A new freelancer building a client base will sit lower than someone with two anchor clients. Revisit the range each quarter.

FAQ

How do I calculate the average labor utilization rate?

Add all billable hours for the group or period, add all available hours, divide the first total by the second and multiply by 100. For example, 312 billable hours across 480 available hours gives 65%, as in Everhour’s worked example. Do not average the individual percentages unless every person has the same available hours.

What does “billable” mean?

Billable work is work that directly generates revenue and can be invoiced to a client, such as delivering project tasks, attending client meetings or doing research for a client’s project. Time spent on your own sales, admin, training or internal projects is non-billable, even though your business needs it.

What is the difference between utilization rate and billable hours?

Billable hours are a raw count of invoiceable time. Utilization rate expresses those hours as a percentage of the hours you could have worked. Ninety billable hours means something very different in a 100-hour month than in a 160-hour month, which is why the ratio is the more useful number.

Can you give an example of resource utilization?

If you work 160 hours in a month, 96 on client delivery and 40 on pitching, admin and training, your billable utilization is 96 ÷ 160, or 60%. Your total or productive utilization, counting work-related time of all kinds, is 136 ÷ 160, or 85%.

Sources

• How to Track Billable Hours: A Guide for Agencies (TrackingTime)
• Glossary of Terms (Ruddr Help)
• Utilization Rate: Formula, Benchmarks & How to Calculate It (Clockify)
• Utilization Rate: Formula, Benchmarks & How to Improve (Asana)
• How utilization is calculated in Operating
• Calculate average utilization rate (Everhour)
• PS Utilization Benchmarks & Capacity Planning (Kantata)
• Billable Hours Tracking & Utilization Reporting Guide (Birdview)
• Billability vs Utilization: What’s the Difference? (TimeTac)
• Billable Utilization: Formula, Benchmarks & How to Increase (Scoro)
• Odoo for Professional Services: Time, Billing, Projects (BiztechCS)
• 5 KPIs from the SPI Professional Services Maturity Benchmark (Deltek)
• Freelance Utilization Rate: Formula, Benchmarks & Fixes (Pomlo)
• The Professional Services Utilization Crisis (Servantium)
• Billable Hours: The Complete Guide (TimeSolv)

Recommended

• Value Based Pricing for Freelance PMs: Test One Outcome Next Week
• Freelancers: Negotiate Project Management Fees With 3 MESO Packages
• 5 Productized Services for Experienced Freelance Software PMs
• Project Estimation Methods: Choose, Combine, Defend