Marketing ROI

What Is ROAS? (And What a Good ROAS Looks Like)

By the ToolFees team · Updated November 2026

ROAS — return on ad spend — is revenue divided by ad spend: spend $1,000 on ads that generate $5,000 of revenue and your ROAS is 5.0x, or 500%. A ROAS of 4.0x is the commonly quoted healthy benchmark, but the only figure that truly decides whether your ads make money is your break-even ROAS, which falls straight out of your gross margin. This guide covers the formula, the benchmarks, and the margin maths that turns ROAS from a vanity number into a decision tool.

The formula

ROAS — return on ad spend — is the revenue your advertising generates divided by what the advertising cost. Google Ads and Meta both report it, and the definition is identical on every platform:

A campaign that spends $1,000 and produces $5,000 of sales has a ROAS of 5.0 — written 5.0x, or 500%. The two forms are the same number in different dialects: five dollars of revenue for every advertising dollar. Nothing about profit is claimed yet — that distinction is where this guide spends most of its time, because it is where advertisers go wrong.

What a good ROAS looks like

Source: ROAS bands are widely used planning conventions; whether a given ROAS is profitable depends on gross margin — see break-even ROAS below. Last verified: November 2026

The 4.0x benchmark is quoted everywhere, and it is not meaningless — but it is a convention, not a law. Whether 4.0x is good, irrelevant or disastrous depends entirely on the number in the next section.

Break-even ROAS: the number that actually matters

The only money available to pay for advertising is the gross margin on the sales the ads generate. If a product sells for $80 and costs $50, each sale contributes $30 — a 37.5% margin — toward ads and profit. Advertising breaks even when the ad cost per sale exactly equals that contribution, which reduces to one formula:

Source: Break-even ROAS = 1 ÷ gross margin, applied to each margin. Last verified: November 2026

So “is a 300% ROAS good?” has a real answer: at a 50% margin, yes, comfortably profitable; at a 33.3% margin it is the exact break-even line; at a 25% margin the campaign loses money on every sale despite a headline that sounds like a 300% return. And if your break-even ROAS sits above about 5x, better ads are rarely the fix — raising margin, through price or product cost, is. Measure yours with the ROAS calculator, then compare it against your break-even figure from the break-even ROAS calculator.

ROAS is not ROI

ROAS measures revenue against ad spend only. ROI — return on investment — measures profit against all the costs: the product, the platform and payment fees, the creative, the agency, and the ad spend itself. ROAS is the faster number to read inside an ad account; ROI is the number that decides whether the business made money. A campaign can post an excellent ROAS and a negative ROI whenever margins are thin — for example, a 5.0x ROAS on a product with a 10% margin returns $5 of revenue per ad dollar but only $0.50 of gross profit against that dollar.

Three campaigns, read properly

Why your platform numbers disagree

Google, Meta and your shop will rarely report the same ROAS. Ad platforms use their own attribution windows — crediting a sale to an ad clicked days earlier — count gross revenue, and cannot see refunds processed later; your shop’s figures are net and complete. Small differences are normal. Large ones usually mean the windows or the revenue definitions differ, and the fix is process, not panic: pick one consistent source per decision, use net revenue where you can, and judge campaigns over periods long enough for attribution to settle.

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