Ask three attorneys how they would handle the same dispute and the fee arrangements may come back as a retainer, a flat fee, and a contingency percentage. It is tempting to read those as three prices and to reach for whichever number looks smallest, which is roughly as useful as comparing a lease payment against a purchase price. They are three different allocations of risk, and the client is choosing which uncertainty they would rather live with, not which service costs less.
The Retainer Is a Deposit, Not a Price
A retainer is money paid up front and held against work that has not happened yet. Hours are billed against it as they are worked, at an hourly rate stated in the engagement letter, and when the balance runs low the client is asked to replenish it. That is the whole mechanism, and the confusion arises because the word sounds like a fee. It is not a fee. It is a float, and in most arrangements any unused portion is returned when the matter closes.
What the client is buying under this arrangement is time, at a known rate, in an unknown quantity. That works well where the scope genuinely cannot be predicted, which describes most litigation, since nobody can say in advance how the other side will behave. It works badly where the matter is routine, because the client carries all the uncertainty about duration while the attorney carries none. The useful protection is a written estimate of hours by stage, and an agreement to be told when the matter is running past it.
A Flat Fee Prices a Defined Piece of Work
A flat fee is a single number for a described task: a will, a business formation, a real estate closing, a straightforward contract review. It works when the work is predictable enough for the attorney to carry the risk of it running long, which is why flat fees cluster in transactional practice and are rare in disputes. The client gets certainty and pays a modest premium for it, in the same way anyone buying a fixed price rather than an hourly one is paying somebody to absorb the variance.
The part that requires attention is the boundary of the described task. A flat fee for a contract review covers a review, and it may or may not cover a second round after the other side responds, a negotiation, or a revision when the deal changes shape. Well-drafted engagement letters say exactly where the flat fee stops and what happens after that point, usually by reverting to an hourly rate. A client who reads only the number has bought a price without buying a scope.
Contingency Moves the Risk, at a Known Cost
A contingency arrangement pays the attorney a percentage of what is recovered and nothing if there is no recovery. It exists to give people access to representation they could not otherwise afford, and it works because the attorney is effectively investing their time in the outcome. The percentage varies and commonly rises if the matter proceeds past certain stages, which is a reasonable reflection of the additional risk being taken and worth understanding before signing rather than after a case is filed.
The arrangement is only available where there is money to recover, which excludes most defense work and most matters where the goal is to stop something rather than to be paid. It also changes the incentives on both sides in ways worth being conscious of. The attorney has a strong interest in a recovery and a weaker one in the shape of it, so a client who cares about something other than money, such as an admission or a change in behavior, should say so plainly at the outset.
What None of the Three Include
Costs sit outside all three arrangements unless the engagement letter says otherwise, and they are not trivial: filing fees, service of process, deposition transcripts, expert witnesses, and travel. In a contingency matter those costs are often advanced by the firm and then deducted from the recovery, which means the percentage is not the whole of what comes off the top. There is a tax dimension as well, since a settlement or judgment is not automatically tax free and the Internal Revenue Service treats different categories of recovery differently, so the net figure a client ends up with can sit noticeably below the gross one.
The Question That Sorts It Out
One question separates the three cleanly: how predictable is this work. Predictable work should be a flat fee, because the attorney can price the risk and the client should not carry it. Genuinely unpredictable work is hourly against a retainer, with an agreement about updates so the unpredictability is at least visible. Work where the client cannot fund the fight at all, and where there is money at the end of it, is what contingency exists for. Asking which category a matter falls into produces a far better conversation than asking what it costs.
