How does the Net Profit Calculator work?
The calculator subtracts COGS, operating expenses, interest and entered taxes from revenue. Net profit margin then divides the resulting net profit by revenue. The model is intentionally simple and does not capture every accounting line item.
If you only need the revenue-versus-COGS layer, use the Gross Profit Calculator.
Why should all figures use the same period?
Mixing monthly revenue with annual expenses produces a misleading result. Use consistent dates and accounting basis. Business records should support the figures used for formal reporting.
The Cash Flow Calculator is useful when you need to focus on cash movement rather than accounting profit.
What does net profit margin tell you?
Net profit margin expresses modeled net profit as a share of revenue. It can help compare performance over time, but differences in industry, financing, taxes and accounting policies can make cross-company comparisons imperfect.
For a simple total-cost margin without the detailed expense breakdown, use the Profit Margin Calculator.
How can net profit support business planning?
Net profit scenarios can help evaluate expense changes, pricing and growth assumptions. If you are deciding what sales level is needed to cover fixed costs, pair it with the Break-Even Calculator.
Frequently asked questions about Net Profit
Net profit is the amount remaining after the modeled expenses are subtracted from revenue.
Net profit equals revenue minus COGS minus operating expenses minus interest minus taxes entered.
Net profit margin equals net profit divided by revenue, multiplied by 100.
No. Accounting profit and cash flow can differ because of timing, noncash expenses, financing and working-capital changes.
Yes. A negative result indicates a modeled net loss.
Owner distributions are not always income-statement expenses. Use your accounting treatment and professional guidance.
Yes. Blank optional fields are treated as zero, but the result will then exclude those items.
No. It is an educational scenario calculator, not a bookkeeping, financial-reporting or tax-filing system.
Sources and methodology
The calculator uses the formulas described on this page and the values you enter. The sources below provide authoritative U.S. context for business planning, tax, recordkeeping or financial-statement concepts.