ROAS:
how much revenue each ad rupee brings back

What is ROAS?

ROAS stands for return on ad spend. It is the revenue your ads generated for every rupee spent on them. A ROAS of 4 means that ₹1 of advertising brought back ₹4 of sales.

It is a quick way to compare campaigns, audiences and platforms on the same scale. It is also easy to misread, because it counts revenue rather than profit and says nothing about what you paid for the goods.

You will see it written three ways: 4.0, 4x or 400%. They all mean the same thing.

It is mostly used for paid campaigns where you can tie revenue to a specific amount spent: search ads, social ads, marketplace ads and shopping campaigns. It is less reliable for brand awareness work, where the sale may happen weeks later through another channel.

ROAS formula

The division itself is simple. The care goes into making sure the numerator and denominator describe the same thing: the same campaign, the same dates and revenue measured the same way.

1. 1Pick the campaign and the date range.
2. 2Take the revenue attributed to that campaign, excluding GST and refunds where you can.
3. 3Take the amount spent on the same campaign for the same dates, including platform fees.
4. 4Divide revenue by spend.

Example: ₹80,000 spent, ₹3,20,000 earned

Does a 4.0 mean the ads are working? That depends on the margin. With a gross margin of 40%, the ₹3,20,000 of sales carries ₹1,28,000 of gross profit. After paying ₹80,000 for the ads, ₹48,000 is left to cover everything else.

That ₹48,000 is the real answer. The ROAS of 4.0 only tells you how large the revenue was relative to spend.

Break-even ROAS: the number that matters

Break-even ROAS is the ratio at which the gross profit from ads exactly covers the cost of the ads. Below it you lose money on every sale the campaign makes; above it you make a profit before overheads.

For a stricter test, use contribution margin: gross margin less the variable costs that come with each sale, such as shipping and payment-gateway fees. If those take 6 points off a 40% margin, the break-even rises from 2.5x to 1 ÷ 0.34 = 2.94x.

The 4.0 in the example is comfortable at a 40% margin, but it would only break even at 25%. The same campaign is a winner for one product and a loser for another.

Compare campaigns by profit, not by ratio

The table below uses a 40% gross margin. The last column shows the gross profit left after paying for the ads.

Campaign C looks acceptable at 1.8x, and it loses money because it sits below the 2.5x break-even. Campaign B has a lower ROAS than A but still earns ₹12,000, so it should not be cut without looking at why it is weaker.

Together, the three campaigns spent ₹1,00,000 and brought in ₹3,41,000, a blended ROAS of 3.41x and a profit after ad spend of ₹36,400. Pause campaign C and the same two winners deliver ₹3,05,000 on ₹80,000, which is a ROAS of about 3.81x and ₹42,000 of profit, so the blended ratio rises and the profit improves by ₹5,600.

Do not simply chase the highest ratio, either. ROAS usually falls as you raise the budget, because the first audiences you reach are the easiest to convince. A campaign at 6x on a tiny budget may drop to 3x when you scale it, so test increases in steps.

ROAS also ignores what the customer does next. A campaign with a modest ROAS that wins repeat buyers can be worth more than one with a higher figure and no repeat purchases.

ROAS or ROI?

ROI measures profit against what you spent, while ROAS measures revenue. In the example, gross profit is ₹1,28,000, ad spend is ₹80,000, and the return is (1,28,000 − 80,000) ÷ 80,000 = 60%. The ROAS of 4.0 and the ROI of 60% describe the same campaign.

The two can disagree when margins differ between products. A high-ROAS campaign selling a thin-margin item may return less profit than a lower-ROAS campaign selling a high-margin one, which is another reason to check profit as well as the ratio.

Use ROAS to steer day-to-day bidding, since it is available immediately. Use ROI, or break-even ROAS, to decide whether the campaign deserves its budget at all.

Mistakes that make ROAS misleading

• Treating ROAS as profit. It ignores the cost of the goods, shipping, returns and every overhead.
• Trusting platform attribution blindly. Two platforms can both claim the same sale, so their ROAS figures can add up to more than your actual revenue.
• Including GST in revenue. Compare spend with sales net of tax.
• Forgetting refunds and cancellations. A campaign with many returns has a lower real ROAS than the dashboard shows.
• Using one margin for every product. A campaign selling a 20% margin item and one selling a 50% margin item need very different ROAS targets.
• Judging too early. A campaign that has run for two days on a small budget has not produced enough orders to trust.

A related measure is cost per acquisition, which divides spend by the number of customers or conversions instead of revenue. The cost per acquisition calculator on this page is the better tool when order values vary little.