Retainer Pricing Calculator

A retainer pricing calculator turns hours and cost into a defensible monthly price instead of a number pulled from a competitor's rate card. Enter the hours a client actually needs each month, your blended internal cost per hour, an overhead buffer, and the margin you are targeting, and the calculator works backward to the exact retainer that hits it.

The formula behind the number

The calculator loads your internal cost, meaning hours multiplied by blended hourly cost, then adds your overhead percentage to account for tools, management time and non-billable admin. It divides that loaded cost by one minus your target margin to solve for the price that actually delivers that margin, rather than just adding a markup on top of cost. A margin is a percentage of the selling price, not of cost, so a 55 percent margin means 55 percent of the final retainer is profit; adding a 55 percent markup to cost instead only produces roughly a 35 percent margin on the resulting price, which quietly underprices the work.

What to put in blended cost and overhead

Blended hourly cost should be your fully loaded internal cost per hour across everyone touching the account, not just salary. A simple estimate is annual salary plus payroll taxes and benefits, divided by roughly 1,600 to 1,800 billable hours per year, averaged across the team members who will work on this client. Overhead covers costs that are not tied to one specific client hour, such as software subscriptions and account management time that is hard to track directly; 10 to 20 percent is a common starting range, and agencies with heavier tooling or management layers should use a higher number.

Using this for proposals, not just internal math

Run the numbers before a call so you can quote a price with confidence instead of guessing under pressure, and use the achieved margin figure to sanity check any discount before you offer it, since a volume or loyalty discount reduces the final price without reducing your loaded cost, which shrinks the profit portion of that lower price more than it might feel like in the moment.