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Price a retainer by working out how many hours each department will spend on the account, costing those hours at the rates of the people who will actually do the work, and adding your margin target. Then write an overage rule into the agreement and look at the servicing gap every month, because the distance between what you delivered and what you charged is what decides whether the account makes money.
Why price by department instead of one lump sum?
A $15,000 retainer is not one number. It is a plan for how much SEO, content, social and PR the client gets this month, and that plan is the thing you are pricing. So start with the people who will do the work, estimate their hours per department, and multiply by their real billing rates. The total tells you whether $15,000 is a fair fee or a discount you have not noticed yet.
Here is a starting split for a 12-person shop with a $150 blended rate:
| Department | Hours per month | Rate | Share of retainer |
|---|---|---|---|
| SEO | 40 | $150 | $6,000 |
| Content | 30 | $150 | $4,500 |
| Social | 20 | $150 | $3,000 |
| PR | 10 | $150 | $1,500 |
| Total | 100 | $150 blended | $15,000 |
That split will move around. A product launch pulls hours toward PR, a site migration pulls them toward SEO, and that flexibility is exactly what a drawdown retainer sells. But writing the split down keeps the first month honest. Skip it and your first usage statement has nothing to compare against, so nobody notices that content quietly delivered 55 hours.
One more thing: use each person's real rate, not a house rate. A senior strategist at $220 and a coordinator at $95 average out to $150 only if the mix holds. The moment your senior person is doing coordinator work, the retainer is still $15,000 and your cost has gone up. The retainer pricing guide walks through the rate build-up in more detail.
How do you write an overage rule that actually holds?
The most common way you lose money on a retainer is silent absorption. The client asks for one more landing page, someone says yes, and 12 unplanned hours land on the account for free. Nobody decided to give the work away. It happened because there was no rule.
The rule that fixes it fits in a sentence. If the client needs more than the retainer covers this month, they approve and pay for the extra before the work starts, the cap rises for that period only, and it resets next month. A pre-paid overage is revenue the day it is approved, instead of an argument at month end.
Three things make it stick in practice:
- Put it in the agreement, with the overage rate written as a number.
- Show remaining hours on the client's usage statement, so asking for more is never a shock.
- Let your account manager quote an overage without coming to you first.
The rule protects the client too. They get to see what the retainer buys, pay extra for what matters, and drop what does not. A client who has never seen a usage statement cannot make that choice, so they will assume the retainer covers whatever they ask for. Most of them are not trying to take advantage of you. They just have no idea where the line is.
How do you measure the servicing gap?
Every month, compare the value your team delivered (hours at billing rate) with what the retainer paid you. The difference is the servicing gap. Most agencies never see this number, because their tools report delivered value as revenue, which makes the account that burned 130 hours against a 100-hour retainer look like the best client in the book.
Set thresholds and act on them:
| Status | Delivered value vs retainer | What to do |
|---|---|---|
| Green | Within 10% | Normal goodwill, leave it alone |
| Amber | 10 to 25% over | Talk to the client about scope this month |
| Red | More than 25% over, twice running | Reprice at renewal, or cut scope now |
On the example account, 130 hours at $150 is $19,500 delivered against $15,000 paid: a 30% gap. One red month can just be a launch. Two in a row means the retainer is priced for a client who no longer exists.
A 10% gap is not a problem to solve. Some over-delivery is how retainers keep clients, and chasing every last hour turns your account manager into a billing clerk. The threshold exists to separate ordinary goodwill from structural mispricing before it has been running for a year. Client profitability hangs on this number far more than on your hourly rate.
How do you reprice at renewal without losing the client?
Renewal goes better with a year of usage statements than with a feeling. Show the client where the retainer went by department, where the gap was, and what a right-sized retainer looks like. Twelve statements saying content ran 20% over every month make an argument the client already agrees with, because they are the ones who asked for the content.
Bring three numbers to the meeting:
| Number | Example | What it tells the client |
|---|---|---|
| Average monthly delivered value | $18,200 | What they actually used |
| Retainer fee | $15,000 | What they paid |
| Proposed retainer | $18,000 | Where the fee covers the work |
Then give them a choice. Either the retainer goes up to cover the work, or the scope comes down to fit the retainer, with pre-paid overages covering the spikes in between. Both of those are fine outcomes for you. The only bad one is a third year at $15,000 with a 20% gap nobody has mentioned out loud.
What does this look like month to month?
It is a loop, not a one-off exercise. Price by department in the proposal, track hours against each department's share, look at the gap at month close, and adjust at renewal with the evidence in front of you. Skip the measuring step and the loop breaks, which is where most retainer pricing quietly falls apart.
Your margin comes out of the same numbers. At a 55% target on labor, a $15,000 retainer should cost you no more than $6,750 in fully loaded delivery cost, and that is the check worth running before the proposal goes out. The agency gross margin entry covers how to load that cost properly.
Verbial tracks time against each department's share of a retainer and puts the servicing gap on the client's usage statement, so these numbers come out of the timesheet instead of a spreadsheet you rebuild every month. If you want to run this on your own accounts, start free.
Questions
What margin should an agency retainer target?
Most healthy agencies target a 50 to 60% gross margin on labor (revenue minus fully loaded delivery cost) and a 15 to 25% net margin after overhead. If you price from realistic hours at each person's rate and hold a 55% labor margin, you are in a sound place to start.
Should unused retainer hours roll over?
Only as a deliberate decision at period close, and usually only partly. Automatic rollover quietly kills the retainer model, because every month inherits the last one's slack. A carryover credit your account manager chooses to give keeps the goodwill without making next month unpredictable.
How often should you reprice a retainer?
At renewal, and any time the servicing gap runs above 25% for two months in a row. Waiting a full year on an account that is 30% over is the most expensive kind of patience.