Profit Calculator

How to use the profit calculator

Enter your revenue for a period — a month, quarter or year — and the main cost groups for the same period. Cost of goods sold covers the direct cost of what you sold: stock, materials and production labour. Operating expenses are the overheads of running the business, such as rent, salaries, marketing and software. Interest and other costs captures financing costs, and the tax rate converts profit before tax into net profit. The calculator lays the results out like a simplified income statement, with each profit line and its margin.

Profit formulas

Worked example

A small online shop has annual revenue of $120,000. The products it sold cost $50,000, so gross profit is $70,000 — a 58.3% gross margin. Operating expenses (website, advertising, a part-time assistant, packaging) total $40,000, leaving operating profit of $30,000, a 25% operating margin. After $2,000 of loan interest, profit before tax is $28,000. Tax at 21% is $5,880, so net profit is $22,120 — a net margin of 18.4%. In other words, for every dollar of sales, the owner keeps about 18 cents.

Understanding the three margins

• Gross margin shows how profitable your products are before overheads. If it is low, look at pricing and supplier costs; the margin calculator helps set prices for a target margin.
• Operating margin reveals how efficiently the business is run. A strong gross margin with a weak operating margin points to high overheads.
• Net margin is the bottom line after financing and tax — what is actually available to reinvest or pay to owners.

Benchmarks vary widely by sector. Supermarkets often make net margins of 1–3%, restaurants 3–6%, many service businesses 10–20% and established software companies 20% or more. Compare yourself with businesses in the same industry rather than an absolute number.

Profit per period vs per unit

The calculator works with totals, but it is often revealing to divide each line by the number of units or customers. If the shop above sold 4,000 orders, each order brought in $30 of revenue, $17.50 of gross profit and about $5.53 of net profit. That per-order view makes it easy to judge whether a discount, free-shipping offer or paid advertising campaign is worth it: an ad that costs $8 per new order would wipe out the net profit on that sale unless the customer returns.

Profit is not cash

A profitable business can still run out of money. Customers may pay late, stock ties up cash before it is sold, and loan repayments of principal do not appear in profit at all. Track cash flow alongside profit, and keep a buffer for slow months.

Ways to increase profit

• Raise prices carefully. A small price increase drops almost entirely to profit; test it with the markup calculator.
• Cut direct costs. Negotiate with suppliers, reduce waste and returns.
• Control overheads. Review subscriptions, rent and marketing spend against results.
• Know your break-even point. The break-even calculator shows the sales you need just to cover costs, and the ROI calculator helps judge new investments.

This is a simplified model for planning; your accountant's statements follow your local accounting standards and tax rules.