Agency Retainer Calculator

What this tool does

Enter the hours you expect to spend on a client each month, the cost of the people doing the work, the software allocated to the account, and the margin you want. The calculator returns the retainer price that achieves it.

Then it works backwards from the retainer you are actually charging and shows the effective hourly rate, the real margin, and how much scope creep the account can absorb before it turns unprofitable. That second half is usually the uncomfortable part.

A worked example

You charge £2,000 a month. On paper that is fifteen hours of work at a healthy rate.

Now count what actually happens. Two hours of calls that are not delivery. An hour of reporting. Forty minutes across the month answering messages. Two more hours in the third week because the client changed the brief. That is nearly six hours of unbilled work against fifteen budgeted, so the true figure is twenty-one hours.

Subtract the software allocated to the account — the CRM seat, the scheduler, the API costs. What was a comfortable rate is now something closer to an employed salary with none of the security, and the account has no headroom left for a bad month.

The fix is rarely a bigger number. It is a scope definition, a change-request process, and a retainer priced with a creep allowance built in from the start.

What belongs in the cost base

Where people go wrong

Pricing from a competitor's number. Their cost base is not yours. Price from your own costs and your own target margin, then check the result against the market rather than starting there.

Billing time instead of outcome, while quoting a fixed fee. A retainer is a fixed price for a defined scope. If the scope is undefined, you have accepted unlimited liability for a fixed sum.

Ignoring the software line. Tool costs allocated per account add up quickly, particularly for anything priced per seat or per contact. If you are reselling a platform, model the margin separately with the GHL SaaS profit calculator.

No change-request process. Without one, every extra request is absorbed silently until the account is unprofitable and resented. With one, extras become revenue.

Never re-pricing. Costs rise. Scope grows. An account priced three years ago is almost certainly underpriced now.

FAQ

What margin should I target?

That is a business decision rather than a formula. What the calculator does is show you what you are currently achieving, which is often lower than assumed, and let you price deliberately instead of hopefully.

Should I include my own time if I am a freelancer?

Yes, at a realistic rate. A retainer that is profitable only because you pay yourself nothing is not profitable, and it prevents you ever hiring.

How do I price a retainer for a new service?

Estimate the hours, add a generous contingency for the first three months, and agree explicitly that the price is reviewed at month four. Clients accept this far more readily than a price rise that arrives unexplained.

How much scope creep should I allow for?

Track it for a month before deciding. Most agencies discover the real figure is between 20% and 40% of budgeted hours, and it is worth knowing yours rather than borrowing a number.

Does automation change the maths?

Substantially, because it moves work from recurring hours to a one-off build. That is exactly the comparison in the VA vs automation calculator.

Next steps

GoHighLevel Automation for Agencies covers taking delivery hours out of an account, and GoHighLevel White Label Setup covers the recurring-revenue model that sits alongside retainers. Platform costs for that model are on the GoHighLevel pricing page, and the automation layer behind it usually sits on n8n or Make — both billed per execution or operation, which is what makes delivery hours cheap to remove rather than expensive to buy back. To price a one-off build rather than a retainer, use the project cost calculator.

Want delivery hours cut rather than the price raised? Book a discovery call.