The short version
- A true availability retainer pays for capacity held open and is earned when the period passes, whether or not any work is requested. It is rare, and only defensible where the provider genuinely turned other work away.
- A prepaid block of hours is an advance. The money is earned as the hours are worked, and the unworked balance remains the client's in substance regardless of what the invoice is headed.
- A monthly fee for a defined scope is neither. It is earned by delivering the scope, so the arguments are about what is inside the scope rather than about hours.
- Rollover, minimum term, notice and refundability all follow from which of the three you have. Name it in the first clause and most of the standard disputes never start.
Three arrangements share the word
The three are not variations on a theme. They differ on the only question that matters commercially — what has to happen before the provider has earned the money.
What the monthly payment actually buys
Availability only
Prepaid hours
Defined monthly scope
Pure hourly
| True retainer | Prepaid hours | Monthly scope | |
|---|---|---|---|
| What is bought | Capacity held open | A quantity of time | A stated body of work |
| Earned when | The period passes | The hours are worked | The scope is delivered |
| Unused at month end | Nothing to be unused | A balance the client has paid for | Not a concept — output, not input |
| Argument tends to be about | Whether availability was real | Rollover and rate | What counts as in scope |
| Refund on early exit | None, if availability was supplied | Unworked balance | Pro-rated by month, usually |
The regulated professions have already fought this out. ABA Formal Opinion 505 treats the general retainer — a fee purely to secure a lawyer's availability — as genuine but rare, and holds that most fees labelled retainers are advances: the lawyer takes possession of the money but not ownership. Labelling an advance "nonrefundable" or "earned on receipt" does not make it so, and unearned amounts must be refunded when the engagement ends. That is a professional conduct rule rather than general commercial law, but the reasoning travels. Calling a prepayment a retainer does not convert it into one.
Why conflating them causes the disputes
A typical arrangement is written as a fixed monthly fee, sold on the basis of "around twenty hours a month", and delivered as whatever the client asks for. Every term the parties will later argue about depends on which of the three that is, and the contract answers none of them.
- The client uses six hours in January and expects to use thirty-four in February. Whether they can depends on whether they bought hours or bought a scope.
- The client cancels in month four of twelve, having used less than they paid for. Whether anything comes back depends on whether the fee was earned by availability or by work.
- The provider is asked for something adjacent to the usual work. Whether that is included depends on whether the scope was ever written down.
- The provider wants to raise the rate. Whether they can mid-term depends on a clause almost no retainer contains.
None of these are hard problems. They are unanswered ones. A first clause that says which of the three arrangements this is, in one sentence, resolves most of them by implication.
Consulting agreement template
Full text, free to read and copy, with the fee, scope, term and termination clauses set out for an ongoing monthly engagement rather than a one-off project.
Rollover is a capacity question, not a fairness one
Clients ask for unused hours to carry forward because they paid for them. Providers resist because a retainer is a capacity reservation, and hours banked in quiet months arrive in the busiest one.
Roll it over, or let it expire
Use it or lose it
- The provider can staff against a predictable month
- Simple to invoice and to audit
- Reads as punitive when the client's quiet month was the provider's fault
Unlimited rollover
- The client keeps the value of what they paid for
- Builds a liability the provider cannot schedule
- One large redemption can consume a quarter of capacity
Cap the carry-forward and give it an expiry. Unlimited banking is the version that ends the relationship.
Three drafting details make a rollover clause work. Say what happens to banked hours on termination — forfeited is the normal answer and it should be explicit, not assumed. Say whether rolled-over hours are consumed before or after the current month's allocation, because that determines how quickly the bank empties. And say whether banked hours are redeemed at the rate paid or the rate current when used, which matters as soon as rates rise.
Scope, and the work that falls outside it
On a scope-based retainer the fee buys a list. Anything not on the list is a change order at a stated rate, and the value of writing the list is not that it prevents extra requests — it is that it makes them chargeable without a negotiation.
What the scope clause has to fix
- The recurring deliverables, with their frequency and their form.
- The response and turnaround times the fee actually pays for.
- What is expressly excluded — the two or three adjacent things clients reasonably assume are included.
- The hourly or day rate for out-of-scope work, and who has authority to approve it.
- Third-party costs: passed through at cost, at cost plus a stated margin, or absorbed.
- What the client has to supply, and what happens to the timetable when they do not.
Where a retainer sits under a master agreement, the scope belongs in the statement of work rather than in the master — the division of labour between the two is covered in the guide to master agreements and statements of work. Where the retainer is the whole contract, a service agreement with the scope attached as a schedule does the same job, and keeps the scope amendable without reopening the commercial terms.
Minimum term, notice, and rate rises
A retainer is a commitment on both sides, and the term clause is where that commitment is priced. Three things belong in it.
A minimum term is reasonable where the provider incurs real onboarding cost — three months is the common floor, six where a team is assigned. Notice is separate from the minimum term and people conflate them: a six-month minimum with 30 days' notice means the client is committed for six months and can then leave with a month's warning. Notice periods above 60 days on a monthly-billed engagement start to look like a term commitment by another route.
Rate rises are the clause most retainers omit entirely, which means the provider has to reopen the contract to change the price and the client is entitled to say no. The workable version is an annual review on stated notice, with the client free to terminate on notice if they do not accept the new rate. That converts a negotiation into a decision.
Refundability, and where a prepayment sits if the provider stops
The refund question splits cleanly by arrangement. A true availability retainer is earned once the period has passed, because availability was in fact supplied. A prepaid block is earned as it is worked, so the unworked part is repayable. A scope fee is normally pro-rated to the month, because the scope was delivered up to that point.
The harder question is what happens when the provider does not simply stop but fails. This is the point at which the accounting label stops mattering and the insolvency ranking starts.
You prepaid, and the provider stopped
You have paid for work that was not done. Is the provider still solvent?
Yes — they just stopped
The unearned balance is a debt. Ask for it in writing with the hours ledger attached, then treat it as any other unpaid sum.
No — they have filed
You join the unsecured queue. 11 U.S.C. § 507(a)(7) gives individuals a capped priority for deposits on services for personal, family or household use only — business prepayments get none of it.
Two protections follow, and both are cheap. Keep the prepayment small relative to the work in front of it — a month at a time rather than a year — which is the same reasoning that governs deposits and milestone payments on project work. And where the sum is genuinely large, ask for it to be held in a separate account rather than in general funds, which is what the regulated professions have to do anyway.
The reporting is what makes it survivable
Retainers die quietly. The client stops being able to see what they are getting, the invoice arrives every month for the same amount, and eventually somebody asks what it is for and there is no answer to hand. The fix is administrative rather than legal, and it belongs in the contract so it happens whether or not anyone remembers.
- A monthly statement showing hours or deliverables used, the balance carried, and the expiry date of any banked time.
- An invoice that names the period and the scope rather than repeating the word "retainer" twelve times a year.
- A quarterly review of whether the scope still matches what is actually being asked for, minuted in an email.
- A written change order for anything outside scope, approved before the work rather than explained after it.
The third item is the one that saves relationships. Scope drifts because both sides let it, and the honest conversation at month three is a five-minute adjustment. The same conversation at month eleven is a renegotiation conducted by two people who each believe the other has been taking advantage — and by then, the arrangement is usually over regardless of what the contract says.
Sources
General information, not legal advice. This guide explains how these documents and rules generally work. Law varies by jurisdiction and changes, and none of it is applied to your circumstances here. For anything consequential, consult a licensed attorney where you are.
Frequently asked
Is a retainer fee refundable?
It depends on what the fee bought. A payment for availability is earned once the period has run, because the capacity was genuinely held. A prepayment against hours or deliverables is earned as the work is done, so the unworked portion is repayable when the engagement ends. Describing a prepayment as nonrefundable does not by itself convert it into the first kind.
Do unused retainer hours have to roll over?
Not unless the contract says so. Silence usually favours the provider, since a retainer reserves capacity for a period and the period has passed. Most negotiated arrangements land on a compromise: carry-forward capped at a proportion of one month, expiring after one or two months, and forfeited on termination. Write down which of those applies before the first quiet month.
How much notice should a monthly retainer require?
Thirty days is standard for a monthly-billed engagement and matches the billing cycle. Sixty is defensible where a team is assigned or where the provider turns other work away. Longer than that starts to function as a minimum term, and should be priced as one. Keep the notice period and any minimum term as separate clauses so neither is read into the other.
Can a provider raise the rate during a retainer?
Only if the agreement allows it. Without a review clause the rate is fixed for the term and any increase needs the client's agreement. The practical drafting is an annual review on stated written notice, with the client entitled to terminate on the normal notice period if the new rate is unacceptable. That gives the provider certainty and the client an exit.
What is the difference between a retainer and a subscription?
Mostly the substitutability of the person doing the work. A subscription supplies a standardised product to everyone on the same terms; a retainer reserves named capacity and is usually negotiated. The commercial mechanics converge — recurring fee, minimum term, notice — but a retainer carries an expectation of specific people and specific responsiveness that a subscription does not.