These three words get thrown around a lot in firms, and they can feel like intimidating finance jargon. They’re not. Once you understand billing, utilisation and realisation, a huge amount of how firms work suddenly makes sense. Let me explain them plainly.
Quick answer
Billing, utilisation and realisation are three linked concepts at the heart of law firm economics.
- Billing is the process of charging clients for work done. In a time-based model, this involves recording the time spent, often as billable hours, and invoicing the client.
- Utilisation is broadly how much of a lawyer’s available working time is spent on billable client work, as opposed to non-billable activities such as administration, training or business development.
- Realisation is how much of the billed work is actually collected. If time is written off, discounted or not paid, realisation is lower than the full billed amount.
Put simply: utilisation is how much billable work you did, billing is what you charged for it, and realisation is how much you actually collected.
Together, these concepts help explain why firms care so much about how lawyers spend and record their time. Actual targets and percentages vary by firm, role and market, so avoid assuming universal figures. Verify current specifics.
There is also an important caution: because utilisation involves billable hours, it can create pressure to overwork. These are metrics to understand, not to let run your wellbeing. Sustainable, healthy practice matters.
Billing: charging for the work
Billing is simply the process of charging clients for work done. In a time-based model, this means recording the time spent, often as billable hours, and invoicing the client for it.
Accurate and honest time-recording matters, both for the client relationship and for the firm’s economics. Billing is the bridge between the work you do and the revenue the firm earns.
Utilisation: how much billable work
Utilisation is broadly how much of a lawyer’s available working time goes towards billable client work, as opposed to non-billable activities such as administration, training or business development.
It measures how much productive, chargeable work is being done. Non-billable work isn’t necessarily waste. Training, business development and pro bono work can all be valuable, but utilisation specifically tracks the billable share of time.
Target utilisation varies by firm and role, so don’t assume a universal figure. Verify current specifics.
Realisation: how much you actually collect
Realisation is broadly how much of the billed work is actually collected. If time is written off, discounted or simply not paid, realisation is lower than the full billed amount.
This is why efficient, high-quality work that clients are willing to pay for matters so much. It isn’t just about recording hours, but about delivering work that genuinely gets realised.
Realisation is often where the difference between being busy and being profitable becomes visible.
A caution on billing pressure and wellbeing
One honest word. Because utilisation involves billable hours, these metrics can create pressure to overwork.
Understand them because they help you see how the business operates, but don’t let them run your wellbeing. Sustainable, healthy practice matters, and hours are a means, not a measure of your worth.
If billing pressure ever becomes unsustainable, take it seriously and, where needed, talk to someone you trust.
YLCC ACTION STEP
To understand these three concepts, remember that billing is charging clients for work done (in a time-based model, recording time and invoicing); utilisation is the share of your available time spent on billable client work (versus administration, training and business development); and realisation is how much of the billed work is actually collected (after write-offs or discounts). In short: utilisation is how much billable work you did, billing is what you charged, and realisation is what you actually collected. Target rates vary by firm and role, so verify current specifics. And balance these metrics against wellbeing. Hours are a means, not a measure of your worth.
If this is you
If you’re a new associate: Understanding these three terms demystifies a lot of firm life and helps you understand professional expectations.
If you want to be more valuable: Efficient, high-quality work that clients are willing to pay for contributes to better realisation. That’s real value, not just hours.
If billing pressure feels overwhelming: Take it seriously. Sustainable practice matters, and seeking support when necessary is important.
FAQs
- What is utilisation? Broadly, it refers to how much of a lawyer’s available working time is spent on billable client work, as opposed to non-billable activities such as administration, training or business development. It measures the productive, chargeable share of time.
- What is realisation? Realisation refers to how much of the billed work is actually collected. If time is written off, discounted or remains unpaid, realisation is lower than the full billed amount.
- What’s the difference between billing, utilisation and realisation? Utilisation measures how much billable work you did; billing is what you charged for it; and realisation is how much you actually collected. These three concepts are linked and together influence firm economics.
- What are the target rates? Targets and percentages vary by firm, role and market and shouldn’t be assumed. Verify current specifics rather than relying on a generic number.
- Should I just maximise my hours? No. These are metrics to understand, not to let run your wellbeing. Sustainable, healthy practice matters. Hours are a means, not a measure of your worth. Efficient, high-quality work matters more than simply maximising hours.
