Free Break-Even Calculatorwith GST
Find out exactly how many units or how much revenue you need to cover all costs and hit your profit goals — with accurate GST calculations built in.
Break-even is an educational planning tool. Actual results depend on sales mix and overheads.
Break-Even Basics with GST
Contribution Margin
Selling price (excl. GST) minus variable cost per unit. This is the amount each sale contributes toward covering fixed costs.
Break-Even Units
Fixed Costs ÷ Contribution Margin per unit. The number of sales needed before you start making profit.
GST Consideration
Set your selling price correctly before GST. The tool shows both the pre-tax price you need and what the customer actually pays.
Key Formulas Used
(Selling Price excl. GST − Variable Cost per unit)
Units Needed = (Fixed Costs + Desired Profit) ÷
Contribution Margin per unit
Always work with the taxable value (price before GST). GST is collected from the customer and paid to the government separately.
Break-Even Calculator FAQs
Why should I include GST in break-even planning? ⌄
Because your final customer price includes GST. If you ignore it, you may underprice and never actually reach your target profit after remitting tax.
What are fixed vs variable costs? ⌄
Fixed costs (rent, salaries, software) stay the same regardless of sales. Variable costs (raw materials, packaging, shipping) rise with every unit sold.
Can this help with pricing decisions? ⌄
Absolutely. Combine it with the Profit Margin Calculator to set a price that both achieves your desired margin and ensures you hit break-even quickly.
Is this useful for restaurants or retailers? ⌄
Yes. Very useful for anyone with significant fixed overheads (rent, staff, utilities) who needs to know minimum monthly sales targets.
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