Net profit is the amount remaining after the expenses included in your reporting boundary have been deducted from revenue. Use the calculator for a simple operating example, with any tax rate treated as an explicit scenario assumption.
Open the Net Profit Calculator.
How to calculate net profit from revenue and expenses
Begin with recognized revenue for a defined period. Deduct cost of goods sold, operating expenses, interest, and the applicable tax expense, together with any other items needed for a complete reconciliation. A positive result is profit; a negative result is a loss.
For the simplified example on this page, the sequence is:
Pre-tax profit = revenue − cost of goods sold − operating expenses − interest expense.
Illustrative after-tax profit = pre-tax profit × (1 − assumed tax rate).
The second equation is a scenario model for positive pre-tax profit. It does not calculate a tax return or determine the tax expense recognized in formal accounts. Actual taxable income, allowances, losses, timing differences, and entity-specific rules can make tax expense differ from a flat percentage of accounting profit.
The Australian Government guide to a profit and loss statement explains the role of sales and expenses over a reporting period. Use reconciled figures from that period rather than mixing sales estimates with unrelated cash withdrawals.
Organize the inputs into nonoverlapping categories
Revenue should reflect the business activity being measured after relevant sales adjustments. Cost of goods sold belongs to the goods or services represented by that revenue. Operating expenses contain the other included business operating costs, while interest is kept separate for this calculator.
For a hypothetical month, assume revenue of $85,000, cost of goods sold of $34,000, operating expenses of $27,000, and interest expense of $2,000. The pre-tax result is $22,000.
Check what the operating-expense figure contains. If it already includes the $2,000 interest charge and you enter that charge again in Interest Expense, the calculator deducts it twice. The same problem occurs when direct labor is included in both cost of goods sold and a second payroll total.
Depreciation and amortization need consistent treatment too. If they are recognized expenses within the chosen boundary, they must be included somewhere appropriate, but not added again after they have already been included in an input subtotal.
A business with other income, unusual gains, impairments, or additional expense categories may need a fuller reconciliation than this tool offers. Do not silently omit a material item simply because there is no dedicated field for it. Use the calculator as an illustration of the specified categories, and reconcile actual accounts separately.
Enter a complete worked example
Enter Total Revenue as 85,000, Cost of Goods Sold as 34,000, Operating Expenses as 27,000, and Interest Expense as 2,000. Set Tax Rate to zero first. This produces $22,000, which is the pre-tax result of the supplied categories.
For an explicitly hypothetical positive-profit scenario, change Tax Rate to 25%. The assumed tax charge is $22,000 × 0.25 = $5,500. The calculator then returns $16,500.
The 25% rate is an example input, not a statement about the rate your business owes. Do not select it merely because it appears in this example. A professional accounting or tax calculation may require a different amount or a different treatment altogether.
| Reconciliation step | Amount | Running result |
|---|---|---|
| Recognized revenue | $85,000 | $85,000 |
| Less cost of goods sold | $34,000 | $51,000 gross profit |
| Less operating expenses | $27,000 | $24,000 operating result |
| Less interest expense | $2,000 | $22,000 pre-tax profit |
| Less illustrative 25% tax | $5,500 | $16,500 after-tax scenario |
This table is deliberately simple. It assumes no other income or expenses and no duplication among the categories. Its value lies in the visible reconciliation, not in claiming to reproduce every reporting or tax rule.
Distinguish net profit from gross and operating profit
Gross profit stops after cost of goods sold. In the example, it is $85,000 minus $34,000, or $51,000. It leaves operating expenses, interest, and the illustrative tax charge outside that first subtotal.
Subtracting the $27,000 operating expenses leaves $24,000 before the separately stated interest and tax. Subtracting interest leaves $22,000 pre-tax. Only after the illustrative $5,500 tax does the scenario reach $16,500.
These amounts answer different questions. A product may generate a positive gross contribution while the business loses money after its other costs. Conversely, changing how a cost is classified between cost of sales and operating expenses may change gross profit while leaving the final total unchanged.
The New Zealand Government explanation of profit and loss statements discusses revenue, expenses, and the progression to net profit. Check whether a report uses a before-tax or after-tax definition when comparing its “net profit” label with another report.
For percentage comparisons, divide the chosen profit subtotal by compatible revenue. The example’s after-tax scenario margin is $16,500 ÷ $85,000 × 100, approximately 19.41%. Label it with the tax assumption rather than calling it a universal benchmark.
Do not confuse profit with cash available
A profitable credit sale may increase revenue before the customer pays. Purchasing inventory may use cash before the related goods become cost of sales. Loan principal payments use cash but are not the same as interest expense. These timing and classification differences can separate profit from the movement in the bank account.
Suppose $10,000 of the month’s recognized revenue remains unpaid at month-end. That fact alone does not reduce the example’s accounting revenue by $10,000. It changes the collection position and may affect the cash forecast, subject to the business’s accounting basis and any required adjustments.
Likewise, receiving new loan proceeds raises cash but does not turn the borrowing into sales profit. Treating it as revenue would make a financing transaction appear to improve trading performance.
Prepare a separate cash-flow reconciliation when deciding what cash is available for payroll, supplier payments, or distributions. The calculator’s profit result cannot establish that bank funds are sufficient at every date during the month.
Keep forecast values visibly distinct from actual values. Expected receipts, proposed cost cuts, and assumed tax rates belong in a scenario. Reconciled reporting values belong in the actual period. Combining the two without labels makes subsequent performance comparisons difficult to interpret.
Handle losses and compare periods responsibly
If the supplied costs exceed revenue, set the flat tax field to zero when examining the pre-tax operating loss. Multiplying a negative result by one minus a positive tax rate mechanically reduces the displayed loss, as though a proportional tax benefit were available. The tool does not establish whether such a benefit exists or can be recognized.
For example, revenue of $30,000 against $14,000 cost of sales, $18,000 operating expenses, and $1,000 interest produces a $3,000 pre-tax loss. At tax zero, the calculator preserves that loss. Any real tax effect needs a separate calculation under the applicable rules.
When comparing months, preserve the same categories, tax basis, and period length. Identify one-off items instead of quietly excluding them from one month but retaining them in another. If a change in accounting treatment affects the comparison, show the reconciliation.
Retain the source report, input subtotals, any excluded items, and the scenario assumptions with the result. That record makes it possible to explain whether net profit changed because of sales, cost of sales, overhead, financing, tax, or a different reporting boundary.