What Break-Even Return Actually Measures
Break-even ROAS is the minimum advertising return at which a sale covers its allowable costs, but produces no profit. Start with the sale value available for the calculation, subtract non-ad costs such as product cost and other variable costs, then determine how much of that contribution can be spent on advertising. If a $100 sale leaves $30 after allowable non-ad costs, the break-even ROAS is $100 ÷ $30 = 3.33. An ROAS of 3.33 covers the sale; 4.00 leaves $5 after a $25 ad cost.
The number depends on the cost base you allow. A GST-registered business may treat GST differently from a consumer-facing revenue report: business.gov.au says GST is 10% on most goods and services, with the registered business collecting one-eleventh of the sale price. Use a consistent tax basis rather than mixing GST-inclusive revenue with GST-exclusive costs (Source: business.gov.au (Australian Government)).
Profit ROAS measures profit generated for each advertising dollar, such as $5 profit ÷ $25 ad spend = 0.20. It is useful for judging the return after advertising, while break-even ROAS sets the minimum acceptable return before profit begins. Revenue-based efficiency, such as revenue ÷ ad spend, attributed ROAS, or total revenue ÷ total ad spend (MER), is useful for monitoring sales generation, but cannot show whether orders were profitable. Use the break-even ROAS calculator to test the threshold.
| Measure | What it answers | When to use it |
|---|---|---|
| Break-even ROAS | What ad return covers allowable costs? | Set the minimum viable return |
| Profit ROAS | What profit remains per ad dollar? | Judge post-ad economics |
| Revenue efficiency | How much revenue did advertising generate? | Monitor sales generation and channel efficiency |
Build the Cost Base Behind the Number
Build the denominator from the amount a delivered order actually leaves available for advertising. Start with the product selling price, then subtract any discount, product cost, pick-and-pack or fulfilment charge, payment processing fee, shipping subsidy, packaging, marketplace or transaction charge, and the expected cost of refunds or returns. Include variable costs that rise with the order; leave fixed rent, salaries and software for a separate profit view.
Handle GST before comparing the result with ad spend. business.gov.au (Australian Government) states that GST is 10% on most goods and services sold in Australia, and that registered businesses collect the GST portion, which is one-eleventh of the sale price. Thus, a $110 GST-inclusive order contains $10 GST and $100 before GST. If the store is GST-registered, use the ex-GST sale value in the break-even calculation rather than treating collected GST as revenue available to fund ads. The same source says registration is required once GST turnover reaches $75,000 or more (Source: business.gov.au (Australian Government)).
The remaining contribution is the amount available to absorb advertising. A gross-margin calculation is useful for pricing and product-cost review; contribution before advertising is better for deciding whether an order can support acquisition; contribution after advertising shows the realised result. Apply the same treatment consistently to discounts, shipping and tax in the break-even ROAS calculator, or reconcile it against delivered-order profitability in ORVX.
Worked example with sample numbers
This example is illustrative. It uses sample numbers for a baking supplies store selling in Australia. They are made up to show the method, they are not a benchmark, and your own figures will differ.
Formula: Break-even ad return = net price / margin before ads.
| Ad return (revenue / spend) | Ad cost per order | Left after ads |
|---|---|---|
| 1.84x | A$37.47 | -A$9.37 |
| 2.46x | A$28.10 | A$0.00 |
| 3.69x | A$18.73 | A$9.37 |
| 4.92x | A$14.05 | A$14.05 |
Run the same sum with your own numbers in the free calculator, or browse guides for sellers in Australia and more baking supplies guides.
General information only: tax, duty and import rules change and depend on your situation, so check with an accountant or the official source before acting.
Eligible Shopify stores can see these numbers for their own store through the Founding 10,000 offer.
Read Platform Numbers Carefully
A platform’s reported ROAS is its attributed conversion value divided by recorded ad spend. Its attributed revenue is not necessarily all revenue generated by the ads: it is the sales value the platform assigns within its selected attribution window. Conversion value may also reflect the account’s settings for discounts, shipping, tax and purchase value. A shorter window can miss delayed purchases; a longer window can claim sales influenced by other channels. Consent restrictions, browser limits and incomplete tracking can leave some purchases unreported or unattributed.
Use platform ROAS to compare campaigns inside that platform and decide where to investigate. Do not treat it as the store’s complete return. A blended return uses total realised store revenue divided by total advertising spend across channels, making it more suitable for judging advertising against the business as a whole. Keep the numerator consistent: cancelled and returned orders should not remain as revenue. Also normalise GST when comparing figures; business.gov.au says GST is 10% on most Australian goods and services and registered businesses collect the GST portion, one-eleventh of the sale price. For a store-level check, compare both measures in the break-even ROAS calculator, rather than acting on platform conversion value alone (Source: business.gov.au (Australian Government)).
Separate New-Customer and Repeat-Customer Economics
A new customer should first pass a first-order test. If a delivered baking-supplies order produces $30 in contribution before advertising and the campaign spends $30 to acquire it, that order breaks even on advertising at $100 of revenue ÷ $30 of ad spend = 3.33 ROAS. Use this measure when deciding whether the acquisition campaign can stand on its own without relying on uncertain future orders. A break-even ROAS calculator can show the threshold from your store’s inputs.
Repeat customers require a different view, but their next order is not free and should not be assumed. CAC measures advertising spend divided by new customers acquired; customer contribution margin measures what those customers leave after product, fulfilment, payment and other allowable costs; payback measures how long cumulative contribution takes to recover CAC. Use CAC and payback when evaluating a retention or acquisition investment across a defined period, using observed repeat behaviour rather than an assumed reorder rate. A customer who generates $40 of later contribution after $30 CAC has repaid acquisition, but only once that order is actually delivered and retained. Track first-order contribution separately from customer-level profitability so profitable repeats do not hide an uneconomic first purchase.
What break-even return means
Break-even ROAS is a boundary, not a target. It answers one question: what return must advertising generate for the order to cover its allowable costs and leave exactly $0 profit? If a $100 order has $40 available to pay for advertising, the break-even ROAS is $100 ÷ $40 = 2.5. Spending $40 to generate that order produces a 2.5 return and breaks even; spending $45 lowers the return to 2.22 and loses $5 before any other business-level costs.
Use the measure that matches the decision. Break-even ROAS is the threshold for judging whether an advertised sale is economically viable. Actual attributed ROAS shows the return credited to a channel, so compare it with the threshold when assessing a campaign. MER divides total store revenue by total advertising spend and is the better check on blended advertising efficiency, including sales platforms may not attribute. Contribution after advertising, stated in dollars, is useful when deciding which products or collections to scale, reduce or stop. Test the arithmetic with the break-even ROAS calculator.
Sources
- Register for goods and services tax (GST) (business.gov.au (Australian Government), checked 26 October 2026).
How this page was made: drafted with AI from a brief, then checked by automated rules for arithmetic, sources and duplication. The sample numbers were calculated, not reported.