Break-even ROAS is determined by the contribution available to pay for advertising. GST, discounts, shipping, payment fees, fulfilment and expected returns can move the target far above a simple gross-margin estimate.
There is no universal good ROAS for ecommerce. A 3.0 ROAS can be profitable for one product and deeply unprofitable for another. The difference comes from the amount of each sale that remains after variable costs and before advertising.
Break-even ROAS gives a practical floor. Below it, the order loses money before fixed overhead. Above it, the order contributes something toward salaries, technology, rent and profit. The calculation is simple only after the revenue and cost definitions are consistent.
The Basic Formula
Break-even ROAS = Reported revenue divided by contribution before advertising
Contribution before advertising = Reported revenue minus all variable costs other than advertising
If a Rs 2,000 order leaves Rs 800 before advertising, break-even ROAS is 2,000 divided by 800, or 2.5. The brand can spend up to Rs 800 to acquire that order before the pre-overhead contribution reaches zero.
Keep Revenue Definitions Consistent
The numerator must match the revenue value sent to the advertising platform. If the platform receives a tax-inclusive order value, use the same value in the ROAS calculation and remove tax as a cost. If it receives net revenue excluding tax, use that net value consistently.
A mismatch can make the target look safer than it is. Document whether reported value includes GST, shipping income, discounts, cancellations and returns. Use one definition across the ad platform, e-commerce backend and finance report.
Costs to Include for Indian Ecommerce
- Cost of goods sold, including packaging that varies with each order
- GST or other tax not retained by the business
- Discounts and coupon value
- Forward shipping and fulfilment
- Payment gateway or marketplace fees
- Expected reverse shipping, returns and COD RTO cost
- Sales commissions or variable platform charges
- Any free product or gift included in the offer
Do not include fixed costs such as full-time salaries in the break-even acquisition calculation unless the business deliberately uses a fully loaded target. Fixed overhead belongs in the next layer of planning: the target ROAS required to produce the desired operating profit.
A Simple Worked Example
| Order Item | Amount | Treatment |
| Reported order revenue | Rs 2,000 | ROAS numerator |
| Tax not retained | Rs 200 | Variable deduction |
| Product and packaging | Rs 620 | Variable deduction |
| Shipping and fulfilment | Rs 150 | Variable deduction |
| Payment fee | Rs 40 | Variable deduction |
| Expected returns and RTO | Rs 190 | Weighted variable deduction |
| Contribution before ads | Rs 800 | Available for ads and overhead |
| Break-even ROAS | 2.5 | 2,000 divided by 800 |
At 2.5 ROAS, the example order covers the listed variable costs and advertising but contributes nothing toward fixed overhead or profit. A responsible target must therefore sit above break-even.
Calculate Target ROAS
First decide how much contribution the order should retain after advertising. Subtract that desired amount from the pre-ad contribution to find allowable acquisition cost.
Allowable ad spend = Contribution before advertising minus desired post-ad contribution
Target ROAS = Reported revenue divided by allowable ad spend
In the example, assume the brand wants to retain Rs 200 after advertising. Allowable ad spend becomes Rs 600. Target ROAS is 2,000 divided by 600, or 3.33.
Model COD and RTO as Expected Cost
COD should not be treated as a normal delivered order when return-to-origin risk is material. Build a weighted expected cost using the share of COD orders, the RTO rate, forward shipping, reverse shipping and any product loss or handling cost.
For example, if 30 percent of orders are COD and 20 percent of those orders return to origin, the overall RTO exposure affects 6 percent of placed orders before other cancellations. Use actual cohort data by product, region and order value where possible. A sitewide average may hide categories with very different risk.
Use Different Targets for Different Products
One account-level target can misallocate spend. High-margin hero products, low-margin accessories, bundles and clearance items often need different targets. Group products by contribution margin and strategic purpose, then apply targets that reflect each group.
Also separate first-order and repeat-order economics. A lower first-order contribution may be acceptable when repeat purchase is predictable and measured, but projected lifetime value should be based on realized cohort behaviour rather than an optimistic revenue multiple.
Break-Even ROAS by Contribution Margin
| Contribution Before Ads | Break-Even ROAS | Interpretation |
| 20 percent | 5.0 | Only 20 percent of revenue is available for advertising |
| 25 percent | 4.0 | One quarter of revenue is available for advertising |
| 33.3 percent | 3.0 | About one third of revenue is available for advertising |
| 40 percent | 2.5 | Two-fifths of revenue is available for advertising |
| 50 percent | 2.0 | Half of revenue is available for advertising |
These examples assume the contribution percentage and the reported revenue use the same base. They are mathematical relationships, not recommended benchmarks.
Build a Useful ROAS Calculator
- Reported selling price or order value
- Discount and tax treatment
- Product and packaging cost
- Shipping and fulfilment cost
- Payment or marketplace fees
- COD share and expected RTO cost
- Return and refund rate
- Desired contribution after advertising
- New-customer versus repeat-customer mix
Update the calculator when the offer changes. A discount, bundle, free shipping threshold or new COD fee can change break-even ROAS even when campaign performance stays constant.
Use ROAS with CAC and Total Contribution
ROAS is a ratio. It can improve while total profit falls if spend and order volume collapse. It can decline while total profit rises if the additional volume remains above the marginal break-even point. Review new-customer CAC, total post-ad contribution and cash requirements with the ratio.
The best scaling decision is rarely the campaign with the highest ROAS. It is the allocation that produces the strongest total contribution while protecting stock, cash flow and customer quality.
Frequently Asked Questions
What Is a Good ROAS for Ecommerce
A good ROAS exceeds the product’s break-even level by enough to cover fixed overhead and the desired profit. Calculate it from your own contribution margin, return behaviour and customer mix rather than copying an industry number.
Should GST Be Included in ROAS
Use the same revenue definition in the numerator and the contribution calculation. If the ad platform receives GST-inclusive revenue, deduct GST when calculating contribution. If it receives net revenue, keep the calculation on that net basis.
Can I Use Lifetime Value to Set a Lower First Order ROAS
Yes, when repeat behaviour is measured, and cash flow can support the payback period. Use realized cohort contribution, not total lifetime revenue, and apply a conservative allowance for uncertainty.
Why Does Platform ROAS Differ from Store ROAS
Platforms use their own attribution windows and models. The store records completed orders from all sources. Differences can also come from cancellations, returns, duplicate events, tax treatment and currency. Reconcile both views before setting targets.
Set Targets from Real Unit Economics
ProfitPixel connects platform reporting with contribution margin, customer acquisition cost and backend revenue so scaling decisions are based on profit rather than a dashboard target.