The Agency Break Even Calculator estimates the revenue and client volume required to cover fixed costs after variable delivery costs. It uses contribution margin—the portion of each revenue dollar available to pay fixed costs—to avoid treating all costs as fixed.
Enter fixed costs, the variable cost rate, average revenue per client, and current revenue. The calculator reports break-even revenue, break-even client count, contribution margin, and the revenue gap or cushion relative to the current plan. This is useful for setting sales targets and testing changes in pricing or delivery efficiency.
1. Enter fixed costs
Include period costs that do not change directly with revenue.
2. Set the variable cost rate
Enter the share of revenue consumed by delivery costs and other variable expenses.
3. Add average client revenue
Use a representative revenue amount per client for the same period.
4. Compare current revenue
Enter the present forecast to see the gap below or cushion above break-even.
Contribution margin rate = 1 − Variable cost rate
Break-even revenue = Fixed costs ÷ Contribution margin rate
Break-even clients = Break-even revenue ÷ Average revenue per client, rounded up
The variable cost rate must be below 100%. The client count assumes clients are similar enough for an average revenue figure to be meaningful.
Break-even revenue is the sales level at which contribution covers fixed costs and estimated operating profit is zero.
Taxes, financing costs, and desired profit are not included unless incorporated in fixed costs.
Given: Fixed costs of $120,000, a 45% variable cost rate, average client revenue of $15,000, and current revenue of $200,000.
Calculation: Contribution margin = 55%. Break-even revenue = $120,000 ÷ 0.55 = $218,181.82. Break-even clients = $218,181.82 ÷ $15,000 = 14.55, rounded up to 15.
Result: The current forecast is $18,181.82 below break-even.
Examples may include core salaries, rent, insurance, and baseline software, provided they do not change directly with sales volume in the period.
Divide variable delivery costs by related revenue using a representative historical period or a detailed forecast.
A fraction of a client usually cannot be sold, so the tool rounds to the next whole client.
Add the target profit to fixed costs before calculating to estimate the revenue needed to cover both.
Use separate scenarios by client segment or rely on break-even revenue rather than the client-count estimate.