One of the first questions anyone facing a New Jersey criminal or traffic charge asks is “what’s this going to cost?” The honest answer is that it depends — not because lawyers are being evasive, but because there are two common fee structures and they genuinely fit different kinds of cases. Understanding the difference helps you ask the right questions and avoid surprises.
The flat fee
A flat fee is a single agreed price to handle a defined matter — for example, representation through a particular stage of a case. Its big advantage is predictability: you know the number up front, and it doesn’t move based on how many hours the case takes. For many municipal court matters and clearly-scoped charges, a flat fee is common because the shape of the work is reasonably foreseeable.
The thing to nail down with a flat fee is scope: exactly what it covers, and what would fall outside it (for instance, if a case escalates, goes to trial, or requires an appeal). A clear flat-fee agreement spells out where the line is.
The retainer
A retainer is an up-front amount you pay that the lawyer then bills against as work is performed — typically at an hourly rate. It fits cases where the amount of work is genuinely hard to predict at the outset: serious or complex matters, cases likely to involve extensive motions, investigation, or trial. The retainer ensures the lawyer is engaged and funded to do the work; the billing draws down from it as the case proceeds.
With a retainer, the questions to ask are the hourly rate, what’s billed against it, and what happens to any unused portion. A clear written retainer agreement answers all of that.
Why the case type drives the choice
The reason there’s no single price is that a contained municipal-court charge and a serious indictable matter are different animals. The first is predictable enough to price flat; the second may not be, which is what the retainer model is built for. A lawyer quoting you a structure should be able to explain why that structure fits your specific case — that explanation is part of the value.
Injury cases are different entirely
Worth noting: this flat-fee-versus-retainer question is about criminal and traffic defense. Personal injury cases generally don’t work either way — they run on a contingency fee, where the fee is a percentage of any recovery and there’s no fee if there’s no recovery. So which fee conversation you’re even having depends on what kind of case you have.
Get it in writing, and ask early
Whatever the structure, it should be in a written agreement you understand before you commit — scope, what’s covered, what isn’t, and how additional work would be handled. The free consultation is the right place to have this conversation. A lawyer who can explain their fee clearly and in plain language is showing you how they’ll communicate about everything else, too.
If you’re facing a charge in New Jersey
You deserve a clear, honest answer about what defense will cost and why a given fee structure fits your case. We explain fees in plain terms up front — no surprises — and put the arrangement in writing before any work begins. Call for a free consultation and we’ll walk through both the case and the cost.
Part of our complete guide: For every related New Jersey offense, claim, and defense in one place, see our NJ Criminal Charges Guide.