What is the difference between hourly billing and a fixed fee?

Hourly billing charges you for time recorded on your matter, usually in six-minute units, so the final cost is unknown until the work is finished. A fixed fee is a single agreed price for a defined scope, quoted before the work starts, so the cost is known and the firm carries the risk of the work taking longer.

Why do most law firms still bill by the hour?

Time-based billing is simple to administer, aligns with internal utilisation targets, and shifts scope risk onto the client. It is not evidence of better work — it simply reflects how firms have historically measured and recovered effort.

What are the risks of hourly billing for a business?

The cost is unpredictable, every email and call adds to the bill (which discourages you from asking questions), and estimates can be exceeded without you knowing until the invoice arrives. For budgeting purposes it makes legal spend impossible to forecast.

When does hourly billing make more sense?

Genuinely unbounded work — contested litigation, a hostile dispute, or an investigation where the scope cannot be defined in advance — is hard to fix-fee honestly. Even then, a staged fixed fee per phase is usually possible.

How do I compare a fixed-fee quote against an hourly estimate?

Ask the hourly firm for the estimated total, the assumptions behind it, and what happens if those assumptions fail. Then compare that ceiling — not the headline hourly rate — against the fixed fee. Also confirm what is excluded: negotiation rounds, disbursements, and revisions are common carve-outs.

Is fixed-fee legal work lower quality?

No. A fixed fee changes how the work is priced, not who does it or how carefully. It does require the firm to scope carefully up front, which usually produces a clearer engagement and fewer surprises for both sides.

What is a retainer or subscription model?

A monthly retainer gives you an agreed volume of legal support — reviews, calls, and routine documents — for a fixed monthly amount. It suits businesses with steady contract flow that would otherwise be paying ad hoc hourly fees or delaying advice to avoid a bill.

Insight · Working with us

Hourly Rates vs Fixed Fees

Published 18 August 2026

Who carries the risk when legal work takes longer than expected — and how to compare two quotes that are not really comparable.

In short

Hourly billing charges you for recorded time, so the total is unknown until the work is done and you carry the risk of it taking longer. A fixed fee is a single price for a defined scope, agreed before work starts, so the firm carries that risk. For scoped commercial work — contracts, structuring, transactions — a fixed fee is almost always the better commercial deal. Genuinely open-ended disputes are the main exception.

The choice between hourly rates and fixed fees is not really about price. It is about who carries the risk that the work takes longer than expected — and about whether you feel free to pick up the phone.

How each model works

Hourly billing

Time is recorded against your matter, conventionally in six-minute units, and multiplied by the fee earner's rate. You receive an estimate at the outset; the invoice reflects actual time. Every email, call and internal discussion is chargeable.

Fixed fees

The firm scopes the work up front and quotes a single price for the deliverable. If the drafting takes twice as long as expected, the fee does not change. Scope changes are priced as a separate variation, agreed before the additional work is done.

Side by side

Cost certainty — hourly: none until the invoice. Fixed: known before work starts.
Who carries scope risk — hourly: you. Fixed: the firm.
Incentive on efficiency — hourly: rewards time spent. Fixed: rewards getting it right quickly.
Cost of asking a question — hourly: a unit of time, so clients ration questions. Fixed: nil within scope, so you actually ask.
Budgeting and approval — hourly: hard to get board or partner sign-off on an open number. Fixed: a single line item.
Best suited to — hourly: unbounded disputes and investigations. Fixed: contracts, structuring, transactions, compliance, ongoing advisory.

The hidden cost of hourly billing

The obvious risk is the overrun. The less obvious and more expensive risk is behavioural: when every interaction has a meter attached, business owners delay advice. They sign the lease without the review, accept the counterparty's indemnity, or hire without updating the contract — because a quick question feels like an invoice waiting to happen. The eventual dispute costs many multiples of the advice that was avoided.

When hourly is genuinely the honest answer

Some work cannot be scoped in advance with integrity. Contested litigation, an urgent injunction, a regulatory investigation, or a hostile shareholder dispute can each turn on the other side's conduct. Even then, the better approach is a staged fixed fee — a fixed price for the next defined phase, re-quoted as the matter develops — rather than an open meter for the life of the file.

How to compare two quotes properly

Compare totals, not rates. Ask the hourly firm for its estimated total and the assumptions behind it.
Stress-test the assumptions. What if the other side sends a heavily marked-up draft? What if there are three negotiation rounds instead of one?
Check the exclusions on both sides. Negotiation, revisions, disbursements, tax and stamp duty advice are the usual carve-outs.
Ask who does the work and who reviews it.
Ask what happens if scope changes. A good fixed-fee firm will tell you before it does extra work, not after.

Retainers: the third option

Businesses with steady contract flow often do better on a monthly retainer than on either model. You get an agreed volume of reviews, calls and routine documents for a fixed monthly amount — effectively in-house support without the headcount. That is the logic behind fractional general counsel arrangements.

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Frequently asked

What is the difference between hourly billing and a fixed fee?: Hourly billing charges you for time recorded on your matter, usually in six-minute units, so the final cost is unknown until the work is finished. A fixed fee is a single agreed price for a defined scope, quoted before the work starts, so the cost is known and the firm carries the risk of the work taking longer.
Why do most law firms still bill by the hour?: Time-based billing is simple to administer, aligns with internal utilisation targets, and shifts scope risk onto the client. It is not evidence of better work — it simply reflects how firms have historically measured and recovered effort.
What are the risks of hourly billing for a business?: The cost is unpredictable, every email and call adds to the bill (which discourages you from asking questions), and estimates can be exceeded without you knowing until the invoice arrives. For budgeting purposes it makes legal spend impossible to forecast.
When does hourly billing make more sense?: Genuinely unbounded work — contested litigation, a hostile dispute, or an investigation where the scope cannot be defined in advance — is hard to fix-fee honestly. Even then, a staged fixed fee per phase is usually possible.
How do I compare a fixed-fee quote against an hourly estimate?: Ask the hourly firm for the estimated total, the assumptions behind it, and what happens if those assumptions fail. Then compare that ceiling — not the headline hourly rate — against the fixed fee. Also confirm what is excluded: negotiation rounds, disbursements, and revisions are common carve-outs.
Is fixed-fee legal work lower quality?: No. A fixed fee changes how the work is priced, not who does it or how carefully. It does require the firm to scope carefully up front, which usually produces a clearer engagement and fewer surprises for both sides.
What is a retainer or subscription model?: A monthly retainer gives you an agreed volume of legal support — reviews, calls, and routine documents — for a fixed monthly amount. It suits businesses with steady contract flow that would otherwise be paying ad hoc hourly fees or delaying advice to avoid a bill.

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