Net Profit Calculator

About the Net Profit Calculator

Net profit is the bottom line: what a business actually keeps after every cost and tax has been paid. Revenue shows how much is being sold; net profit shows whether selling it is worth doing. It is the figure owners, lenders and investors look at first, and the one most affected by costs that are easy to overlook.

This net profit calculator works down the income statement in the usual order. From revenue it subtracts the cost of goods sold to give gross profit, then operating expenses to give operating profit, then interest and other costs to give profit before tax, and finally tax to give net profit. Each step comes with its margin, and a summary shows where every 100 of revenue ends up.

How to Use the Net Profit Calculator

Enter your revenue for the period, excluding sales tax or VAT.

Enter the cost of goods sold: the direct cost of what was sold.

Enter operating expenses: rent, salaries, marketing, software, insurance, depreciation and other running costs.

Enter interest and other costs, such as loan interest.

Enter the tax rate on profit. Tax is only charged when profit before tax is positive.

How Net Profit Is Calculated

  gross profit      =  revenue − cost of goods sold
  operating profit  =  gross profit − operating expenses
  pre-tax profit    =  operating profit − interest and other costs
  tax               =  pre-tax profit × tax rate   (if positive)
  net profit        =  pre-tax profit − tax
  net margin        =  net profit ÷ revenue

Step-by-Step Example

Revenue of 500,000, cost of goods sold 300,000, operating expenses 120,000, interest 10,000 and tax at 25%.

  Gross profit:      500,000 − 300,000   =  200,000   (40%)
  Operating profit:  200,000 − 120,000   =  80,000    (16%)
  Pre-tax profit:    80,000 − 10,000     =  70,000
  Tax:               70,000 × 25%        =  17,500
  Net profit:        70,000 − 17,500     =  52,500    (10.5%)

Out of every 100 of revenue, 60 goes on the goods, 24 on running the business, 5.50 on interest and tax, and 10.50 is profit.

The Three Margins

Looking at all three shows where a problem lies. A healthy gross margin with a thin operating margin points to overheads; a healthy operating margin with a thin net margin points to borrowing costs or tax.

Ways to Improve Net Profit

Raise prices. Every extra 1 of price that customers accept goes straight to profit, which is why small price rises have such a large effect.

Cut the cost of goods. Better supplier terms, less waste and fewer returns lift gross profit.

Control overheads. Review subscriptions, premises and staffing against the revenue they support.

Reduce borrowing costs. Refinancing expensive debt lowers interest.

Plan for tax. Use the allowances and reliefs available to your business, with professional advice.

Net Profit Is Not Cash

Net profit follows accounting rules. Sales count when they are made, not when customers pay, and some costs, such as depreciation, involve no cash leaving the business in the period. Loan repayments, on the other hand, use cash but only the interest part is a cost.

So a profitable business can run short of cash if customers pay slowly, stock builds up or loans are being repaid quickly. Watch cash flow alongside profit.

Net Profit for Sole Traders and Small Companies

For a sole trader or partnership, the business's net profit is effectively the owner's income, and personal income tax is charged on it. The owner's drawings are not an expense of the business; they are simply profit being taken out. So the tax rate to enter depends on the owner's personal tax position rather than a single business rate.

For a limited company, directors' salaries are an expense that reduces profit, and corporation tax is charged on what remains. Dividends are paid out of profit after tax, so they do not appear as a cost. When comparing a sole trader with a company, make sure the owner's pay is treated the same way, or the two net profits will not be comparable.

Reading Net Profit Over Time

A single year's net profit can be distorted by one-off items: selling a vehicle at a gain, a large repair, a bad debt written off, or a burst of spending on a new website. Look at several years together, and consider taking unusual items out to see the underlying trend.

It is also worth watching the three margins move. If revenue grows but net margin falls, costs are growing faster than sales. If gross margin holds steady while operating margin shrinks, overheads are the place to look.

Understanding Your Result

Net profit is the bottom line, or a net loss if costs exceed revenue.

Net margin is net profit as a share of revenue.

Gross profit and operating profit show the earlier steps, each with its margin.

Tax shows the tax charged on a positive pre-tax profit.

Where the money goes splits every 100 of revenue between costs, tax and profit.

When Should You Use This Calculator?

Preparing or checking accounts.

Building a budget or a business plan.

Testing the effect of a price rise or a cost saving.

Comparing years or comparing with similar businesses.

Preparing figures for a loan application.

Common Mistakes

Forgetting the owner's pay. A sole trader who takes no salary overstates the business's real profit.

Leaving out depreciation. Equipment wears out and has to be replaced.

Charging tax on a loss. Income tax applies to profit.

Including sales tax in revenue.

Treating profit as cash available to spend.