PracticalMode · November 1, 2026
Use job contribution
Start with the price of a typical job and subtract the costs that rise when you take it on, such as materials, job-specific labor and subcontractors. A $3,000 job with $2,350 of variable costs contributes $650 toward overhead and profit.
Follow the inquiry through to a job
Suppose 200 extra visits reach the right service pages in a month. At a 4% inquiry rate, that gives eight inquiries. If one quarter turn into jobs, the model yields two additional jobs.
Subtract the cost of SEO
In that example, two jobs at $650 contribution produce $1,300. Subtract a $700 monthly SEO cost to estimate $600 of additional monthly profit. These are illustrative assumptions. The same spending can produce a loss if fewer visitors become customers.
Find the break-even point
Divide monthly SEO cost by contribution per additional job. At $700 and $650, the break-even point is about 1.08 expected jobs per month. In an individual month it takes two complete jobs to cover that cost.
Revisit the assumptions
Compare search clicks, qualified inquiries and actual completed jobs across comparable periods. Account for seasonality, capacity and the time between an inquiry and a sale. Avoid assigning every increase in work to SEO.