Net Profit Margin Calculator: The Bottom-Line Margin
Find the net profit margin — the share of every revenue dollar that survives all the way to the bottom line as profit.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Profit margin | Markup | Profit |
|---|---|---|---|
| $800k rev · $720k costs | 10.00% | 11.11% | $80,000.00 |
| $2M rev · $1.7M costs | 15.00% | 17.65% | $300,000.00 |
| $150k rev · $158k costs | -5.33% | -5.06% | -$8,000.00 |
| $60k rev · $51k costs | 15.00% | 17.65% | $9,000.00 |
How This Calculator Works
Enter total revenue and total costs and expenses, including the cost of goods sold, overheads, interest, and tax. The calculator finds net profit and expresses it as a percentage of revenue. Net margin is the final, most complete profitability figure — what is genuinely left for owners and reinvestment.
The Formula
Profit Margin and Markup
Markup = (Revenue − Cost) / Cost × 100 — the same profit measured against cost instead of revenue
Worked Example
A business with $800,000 of revenue and $720,000 of total costs and expenses keeps $80,000 of net profit. That is a 10% net profit margin — one dime of true profit per dollar of sales after absolutely everything has been paid.
Key Insight
Net margin is thin almost everywhere — a 10% net margin is solid in most industries. Because it sits at the end of a long chain of costs, a small revenue increase or cost cut can move it sharply, for better or worse.
Frequently Asked Questions
What is net profit margin?
Net profit margin is net profit — revenue minus every cost, expense, interest payment, and tax — expressed as a percentage of revenue. It is the most complete measure of profitability.
What is included in total costs and expenses?
Everything: the cost of goods sold, all operating overheads, interest on debt, and income tax. If a cost reduces profit, it belongs in this figure.
How does net margin differ from operating margin?
Operating margin stops before interest and tax. Net margin includes them, so it is always lower and reflects what the business actually keeps at the end.
Is a 10% net margin good?
In many industries, yes. Net margins above 20% are unusual and tend to signal strong pricing power. Always compare against the typical margin for the sector.
Why is net margin so volatile?
It is the difference between two large numbers — revenue and total cost — so a modest change in either can swing the margin substantially. That sensitivity is why owners watch it closely.
Related Calculators
Data Sources & Benchmarks
This calculator draws on 3 independent, dated sources.
Methodology & Review
Net profit is revenue minus all costs, expenses, interest, and tax. Margin expresses that profit against revenue. The calculator reflects only the figures entered and assumes total costs include everything subtracted from revenue.
Written by Ugo Candido · Last updated May 17, 2026.