Small Business guide
Break-Even ROAS vs Profitable ROAS
Calculate the ad-spend threshold that covers variable costs and the stricter ROAS needed to fund overhead and profit.
Updated 22 July 2026 • Reviewed by Tools by Layna Editorial Team • General information only
Why this decision is easy to misread
Break-even ROAS is the revenue multiple at which contribution after variable costs and advertising reaches zero. Profitable ROAS must leave enough contribution to cover fixed overhead, owner wages, tax and the desired business profit.
The distinction explains why a campaign can appear to “break even” in Ads Manager while the bank balance still falls.
Ecommerce decisions should be based on contribution profit, not revenue or platform ROAS alone. GST, discounts, landed cost, fulfilment, payment fees, refunds, returns and acquisition cost all sit between a sale and cash available to cover overhead.
Attribution is also imperfect. Platform-reported revenue may include customers who would have purchased anyway, while store reports can miss the influence of earlier advertising. Use the calculator as a unit-economics model and compare it with actual cohort and payment data.
The calculation, step by step
Net sales
Remove GST and use the actual selling price after discounts.
In the calculator, this item should be entered separately so a change in net sales can be tested without hiding it inside another assumption. Keeping the input visible also makes later reviews and comparisons more reliable.
Variable costs
Subtract landed cost, fulfilment, shipping, payment fees and expected return losses.
In the calculator, this item should be entered separately so a change in variable costs can be tested without hiding it inside another assumption. Keeping the input visible also makes later reviews and comparisons more reliable.
Break-even CAC
The contribution before ads is the maximum acquisition cost before first-order profit reaches zero.
In the calculator, this item should be entered separately so a change in break-even cac can be tested without hiding it inside another assumption. Keeping the input visible also makes later reviews and comparisons more reliable.
Break-even ROAS
Divide customer revenue by break-even CAC.
In the calculator, this item should be entered separately so a change in break-even roas can be tested without hiding it inside another assumption. Keeping the input visible also makes later reviews and comparisons more reliable.
Target ROAS
Reduce allowable CAC until the desired per-order contribution remains.
In the calculator, this item should be entered separately so a change in target roas can be tested without hiding it inside another assumption. Keeping the input visible also makes later reviews and comparisons more reliable.
Monthly overhead
Compare total contribution across orders with fixed costs.
In the calculator, this item should be entered separately so a change in monthly overhead can be tested without hiding it inside another assumption. Keeping the input visible also makes later reviews and comparisons more reliable.
Worked Australian example
A $99 order discounted to $89.10 may contain $8.10 of GST. After product, shipping, fulfilment, payment fees and expected returns, contribution before ads might be $38. If CAC is $30, the order contributes $8—not the $59 implied by revenue minus ad spend alone.
Break-even ROAS is roughly $89.10 divided by $38, or 2.34x. A target of $15 profit requires a lower CAC and therefore a higher ROAS.
Decision checklist
| Step | What to confirm |
|---|---|
| 1 | Use store revenue after discounts. |
| 2 | Exclude GST from economic revenue. |
| 3 | Update return losses by product. |
| 4 | Set a target contribution, not merely zero. |
| 5 | Reconcile platform ROAS with store orders. |
Use the calculator with this guide
Open Ecommerce Profit and Break-Even ROAS Calculator Australia
Start with GST-exclusive revenue and deduct landed cost, fulfilment, payment fees, expected returns and acquisition cost at an order level.
Use the linked calculator for break-even roas vs profitable roas with a documented base case. Save the output, then create a conservative case using the most uncertain input from the worked example.
The useful break-even point is the ad efficiency or selling price where contribution profit reaches zero after all variable costs. Record that threshold beside the headline result; it is often the clearest way to judge whether the decision has enough margin for error.
Common mistakes
- Using RRP when most orders are discounted.
- Leaving GST in revenue.
- Ignoring refunds and exchanges.
- Calling zero contribution profitable.
- Using one ROAS target for every product.
Questions to answer before acting
- Use store revenue after discounts.
- Exclude GST from economic revenue.
- Update return losses by product.
- Set a target contribution, not merely zero.
- Reconcile platform ROAS with store orders.
Where break-even roas vs profitable roas depends on law, tax, eligibility, lending policy or a contract, verify the applicable rule with the official source. The calculator measures the consequence of the input; it does not establish that the input legally applies.
Record keeping and review
For this calculation, retain the evidence behind net sales and variable costs. Label each number as confirmed, quoted, estimated or stress-tested, and date the evidence so a later comparison does not silently mix figures from different periods.
Official sources
The sources below were selected for Break-Even ROAS vs Profitable ROAS because they define the relevant measurement, rule or evidence base. Recheck dated rates, thresholds and official guidance before acting.
Related guides
Frequently asked questions
Is 3x ROAS profitable?
Only if the product’s variable costs and target contribution support it.
Should ROAS use GST-inclusive revenue?
Platforms may report customer revenue, but unit economics should remove GST where applicable.
Why does target ROAS differ by product?
Margins, discounts, return rates and fulfilment costs differ.
Does break-even include fixed costs?
Not unless they are allocated into the target contribution.
What is a better metric than ROAS?
Contribution profit and CAC alongside ROAS provide a clearer view.
Sensitivity check before acting
Stress-test discount rate, customer acquisition cost and returns together. Those inputs compound: a discount reduces revenue while fulfilment and many fees remain, and a higher return rate can erase the contribution left for advertising.
For Break-Even ROAS vs Profitable ROAS, keep the base, conservative and stress cases together. The decision is stronger when it survives a realistic adverse change rather than depending on one precise forecast.
Bottom line
Break-even ROAS protects against losing money on the order; profitable ROAS must also build a viable business.