Startup Profit Calculator

How this calculator works

Monthly revenue = average sale price × jobs or sales per month.

Monthly gross profit = monthly revenue − average cost per job × jobs or sales per month.

Estimated monthly profit = monthly gross profit − monthly expenses.

Break-even jobs = monthly expenses ÷ profit per job.

Build a useful financial estimate

Use this profitability calculator to compare a business idea with the workload you can realistically handle. Start with a typical month, then try a slower month before relying on the result for financial planning.

• Separate one-time spending: Enter equipment and launch purchases under startup costs. This amount affects payback time; it is not deducted from each month's operating result.
• Include ongoing overhead: Put fixed expenses such as rent, insurance, and software in monthly expenses. Include other operating expenses that you have not allocated to individual jobs.
• Account for each sale: Use average cost per job for materials, transaction fees, and direct labor. Count each expense once, rather than in both input fields.
• Check capacity: Base sales volume on available hours and realistic customer demand. A full schedule may require extra staffing or equipment.

For example, the default inputs of 30 jobs at $150 each, $35 per job, and $1,200 in monthly overhead produce $4,500 in sales and $2,250 in estimated monthly surplus. Break-even is 11 whole jobs, and recovering the $5,000 initial investment takes about 2.2 months if those assumptions hold.

As a simple startup KPI, compare the break-even workload with your available capacity. For a rough profit margin based on the displayed estimate, divide the monthly surplus by monthly sales and multiply by 100. This example gives 50%, before any expenses you left out.