METHOD & GUIDANCE
How this calculation works
Keep every input on the same time basis—for example, one month or one financial year—and do not mix cash figures with accrual figures. Tool IQ recalculates every output immediately; nothing you enter is saved or sent to us.
How to use the result
Use contribution per unit to connect pricing with break-even volume and expected profit at the forecast sales level.
Worked example
An 80 price less 32 variable cost contributes 48 per unit. At 120 sales that contribution is compared with 4,000 fixed cost.
Common mistakes
- Including fixed overhead in variable cost.
- Assuming every product has the same contribution.
- Focusing on revenue while contribution is negative.
Frequently asked questions
Is the contribution margin calculator free?
Yes. It requires no account and stores no calculation inputs.
Can I use the answer for a formal filing?
No. It is a planning estimate, not accounting, tax, legal or investment advice. Confirm material decisions with a qualified professional.
Which period should I use?
Keep every input on the same basis—for example, one month or one financial year. Use current figures first, then save a cautious scenario for comparison.
Continue the decision
- Break-even Calculator — Find the sales volume needed to cover every cost.
- Target Pricing Calculator — Find the price needed to achieve a target margin.
Popular small-business decision paths
- Set a price from cost and target margin
- Check profit and margin per sale
- Find the sales volume needed to break even
Method reviewed 5 August 2026. Figures are illustrative and calculated locally in your browser. Official sources are linked where a rule or obligation affects how the result should be used. Read the Tool IQ calculation standard for our checking process, limitations and corrections policy.