Example result based on the prefilled values.
Break-Even Units
334.00
Revenue Needed
A$16,700.00
Contribution Margin
A$30.00
Continue your plan
Useful next calculations
When to use this calculator
- Before pricing a job, setting margin targets, or reviewing hiring costs.
- When you want to test sensitivity around volume, VAT, markup, or overhead changes.
- When you need a practical estimate before committing to a budget or proposal.
- When you are modelling break-even volume and want to see how it shifts as overheads or prices change.
- When you are preparing a quote and need to verify that the margin holds after materials, labour, and VAT are accounted for.
A realistic Australia planning example
Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.
Fixed Costs (A$)
A$500
Selling Price per Unit (A$)
A$0.30
Variable Cost per Unit (A$)
A$500
After entering these figures, review break-even units, revenue needed and contribution margin together rather than in isolation — each metric tells a different part of the story. Then rerun the tool with one input adjusted to see which variable has the biggest effect on all three outputs before you settle on a plan.
How to read your results
Break-Even Units
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Revenue Needed
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Contribution Margin
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Method & assumptionsAuthoritative sources
The break-even point in units is calculated as: Fixed Costs ÷ (Selling Price per Unit − Variable Cost per Unit). The denominator — selling price minus variable cost — is known as the contribution margin per unit. To find break-even in revenue terms rather than units, divide total fixed costs by the contribution margin ratio (contribution margin per unit divided by selling price).
Enter all figures excluding VAT if your business is VAT-registered, as VAT is not part of your underlying economics. This calculator assumes a single product or a consistent product mix and does not account for step-fixed costs (where fixed costs jump at certain output levels). It is intended as a planning aid; for statutory financial reporting, use formal management accounts prepared with your accountant's guidance.
Common mistakes
- !Using an assumption that is not supported by a current local quote, bill, statement or official source.
- !Treating a generic estimate as a lender, provider, payroll or tax authority decision.
- !Mixing monthly and annual inputs without converting them consistently.
- !Forgetting location-specific taxes, fees, eligibility rules or payroll deductions where they apply.
- !Testing only one scenario instead of checking how a cautious assumption changes the result.
What to do next
- Run a second scenario with a cautious assumption so you can see the downside clearly.
- Compare the result with the related calculators below before making a decision.
- Check current local rules, eligibility and provider terms before applying or committing money.
- Keep a record of the assumptions so you can update the estimate when a quote, bill or pay figure changes.
- Use the result to prepare better questions for a lender, provider, adviser or employer rather than treating it as a final answer.
Frequently asked
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