Revenue vs profit: a service-business example

Revenue is not what the owner can spend

Revenue records the value of sales recognized for a period under the accounting approach in use. Profit is a remainder after specified expenses. “Profit” without saying which expenses were deducted can be ambiguous: gross profit, operating profit, and net profit are different subtotals.

For a beginner’s planning model, use a clearly named simplified operating result and list the exclusions. Do not call it net profit if taxes, financing, owner compensation, or other relevant expenses remain outside the calculation.

Business.govt.nz distinguishes revenue and profit metrics. The original example here also uses a contribution format, consistent with the cost-volume-profit framework taught by OpenStax.

Reconcile one month line by line

Each package contributes $100 before fixed costs. The full month produces $900 after the included costs. This model excludes tax, financing, startup spending, depreciation, and owner pay unless already included in the cost assumptions. It assumes no refunds, discounts, or changes in unit costs.

Do not confuse contribution with gross profit

Contribution is revenue minus variable costs in this managerial model. Gross profit is revenue minus the costs classified as cost of sales in the applicable accounting presentation. The two can differ because cost of sales may include costs that are not variable.

For a small service exercise, contribution is useful for asking how another sale helps cover fixed costs. It is not a universal replacement for the categories in an accountant’s financial statements. Label the subtotal correctly and keep the classification consistent.

If you are unsure how to classify a per-package cost, work through the fixed and variable cost guide first. That is a separate exercise with a $160 price, $65 variable cost, and $300 initial fixed costs; this revenue example uses $160, $60, and $600. Learn from the classification method, but keep the scenarios and their subtotals separate. A clean-looking calculation with missing costs can be less useful than a rough estimate that shows its uncertainty.

Compare margin and markup using the same base

Contribution margin in this example is $100 ÷ $160 = 62.5% of revenue per package. The simplified operating-result margin is $900 ÷ $2,400 = 37.5%. They answer different questions.

If someone calculates $100 ÷ $60 = about 166.7%, they are describing the increment above that variable-cost base, not a margin on sales. Calling both numbers “margin” creates confusion. Also, this increment does not make $60 a complete cost for pricing: monthly fixed costs and excluded items remain.

Use a dollar reconciliation before relying on a percentage. A high percentage on a small volume may still produce too little to cover the costs or time that matter.

Test what changes with volume and owner time

The allocation is a planning choice, not a payroll or tax calculation. Track hours separately so you can judge both the cash economics and the time the work requires.

Check cash and capacity before drawing an income conclusion

Revenue can be recognized before the customer pays, depending on the accounting basis and facts. An equipment payment or loan receipt can affect cash without being the same thing as operating profit. Follow the dated cash example before treating the $900 as available money.

Fifteen packages may also exceed your available hours. The capacity worksheet shows how to subtract administration, buffers, and job-specific time before accepting a volume target.

To reproduce this example in the Numbers Lab, enter price 160, variable cost 60, monthly fixed costs 600, and volume 15. Use the alternative case with volume 8. Keep the result’s name and exclusions attached to the numbers when you print or share them.