Most Montana DUI defense is billed one of two ways: a flat fee for a defined scope of work, or an hourly rate charged against money paid in advance. Neither is better in every case. The rules that protect you are the same under both, and they come from the Montana Rules of Professional Conduct, which the Montana Supreme Court adopts and which bind every lawyer licensed here. This page explains those rules and what to look for in an agreement. It does not quote fees. It is part of our Montana DUI Guide.
The Two Structures Side by Side
| Question | Flat fee | Hourly |
|---|---|---|
| What you know up front | The price for a defined scope of work | The rate, and usually an estimate, but not the total |
| What can change the total | Work outside the written scope, such as a trial or a license petition if they are not included | The number of hours the case takes |
| Who carries the risk of a long case | Mostly the lawyer, within the scope | Mostly the client |
| What to read closely | Which stages are covered and when the fee is treated as earned | The rate for each person who bills, billing increments, and how often you get a statement |
| Common use | Misdemeanor DUI with a predictable path | Felony cases and cases with unusual complications |
Some agreements mix the two, for example a flat fee through a pretrial resolution and a second, separate fee if the case is set for trial. That is still a flat-fee arrangement. It simply has more than one stage, and the writing should say where each stage begins and ends.
Every Fee Must Be Reasonable
Rule 1.5(a) prohibits an unreasonable fee or an unreasonable amount for expenses, whatever the structure. The rule lists factors for judging reasonableness, including:
- the time and labor required, the difficulty of the questions, and the skill needed;
- the fee customarily charged in the locality for similar services;
- the time limitations imposed by the client or the circumstances;
- the experience, reputation, and ability of the lawyer;
- whether the fee is fixed or contingent.
That is why a lawyer usually wants to hear the facts before quoting. The charge level, a test refusal, a blood test, a crash, and how far the case is likely to go all change the time and labor involved. Our page on what a DUI lawyer costs covers those drivers.
The Writing Requirement
Montana's rule does not leave this to a handshake. Rule 1.5(b) says the scope of the representation, any changes in the scope, and the basis or rate of the fee and expenses for which the client will be responsible shall be communicated to the client in writing, before or within a reasonable time after the representation begins. Any change in the basis or rate must also be in writing.
The rule does not apply when the lawyer charges a regularly represented client on the same basis as before, or when it is reasonably foreseeable that the total cost to the client, including attorney fees, will be $500 or less. Neither exception fits a typical first meeting about a DUI charge, so expect a written agreement.
For a DUI, the scope section is where to slow down. Check whether it names:
- the criminal charge and the court it is in;
- the district court petition on a test-refusal suspension, which is a separate civil case with a 30-day deadline (MCA § 61-8-1017);
- contested motions and hearings;
- trial;
- an appeal;
- expenses such as an independent analysis, an expert witness, or transcripts.
A lawyer may limit the scope of a representation if the limit is reasonable and the client gives informed consent (Rule 1.2(c)). A limit you did not notice is not informed consent, so ask about anything the agreement leaves out.
No Contingency Fees in a Criminal Case
Rule 1.5(d)(2) is short: a lawyer shall not enter into an arrangement for, charge, or collect a contingent fee for representing a defendant in a criminal case. A DUI is a criminal case. So a fee that is owed only if the charge is dismissed, or a bonus for a reduction, is not something a Montana lawyer may offer. The same idea runs through the advertising rule, which treats a communication likely to create an unjustified expectation about results as misleading (Rule 7.1(b)).
Where Your Money Sits
Rule 1.15(c) requires a lawyer to deposit legal fees and expenses that have been paid in advance into a client trust account, to be withdrawn only as fees are earned or expenses incurred. With hourly billing that is straightforward: the lawyer bills time, sends a statement, and moves the earned amount. You are entitled to a full accounting on request (Rule 1.15(d)).
With a flat fee, ask how the agreement treats the payment: when each part is considered earned, and what happens if the case ends before the scope is finished. The answer should be in the writing, not just in conversation.
If the Relationship Ends Early
You can discharge your lawyer, and a lawyer who is discharged must withdraw (Rule 1.16(a)(3)), subject to the court's permission where a case is pending (Rule 1.16(c)). On termination the lawyer must take reasonable steps to protect your interests, including surrendering the papers you are entitled to and refunding any advance payment of fee or expense that has not been earned or incurred (Rule 1.16(d)).
Choosing Between Them
A flat fee suits you if a known cost matters most and the path of the case is fairly predictable. Hourly billing suits a case whose size nobody can estimate yet. In either, the comparison that matters is not one structure against the other. It is whether you understand exactly what you are paying for. Bring the questions on our questions to ask a DUI lawyer page, and if hiring is out of reach, read who qualifies for a public defender. The fine, the classes, and the other court-ordered costs are a separate budget, covered in what a DUI costs.
This page is general information about the Montana Rules of Professional Conduct as published by the State Law Library of Montana. It is not a fee quote or legal advice about your specific case.