Ad Spend Benchmarks 2026: What is a "Good" ROAS?

"What's a good ROAS?" is the wrong question. Return on ad spend without a margin number attached is a vanity metric — a 4x ROAS can be wildly profitable for one business and a money-loser for another, depending entirely on what happens after the sale.

The Break-Even ROAS Formula

The formula is simple: Break-Even ROAS = 1 ÷ Gross Margin. A business with a 25% gross margin needs to generate $4 in revenue for every $1 spent on ads just to break even (1 ÷ 0.25 = 4x) — anything below 4x ROAS is losing money on that spend, and anything meaningfully above it is genuinely profitable. A business with a 50% gross margin only needs a 2x ROAS to break even, meaning a "mediocre" 3x ROAS that would sink the first business is comfortably profitable for the second.

This is why chasing an industry "benchmark" ROAS number is close to meaningless without knowing your own margin — the same 4x ROAS is a disaster at one margin level and a strong result at another. Calculate your own break-even number first; that's the only ROAS figure that actually applies to your business.

Blended vs. Platform ROAS

Platform-reported ROAS (what an ad platform's own dashboard shows) tends to run optimistic — attribution windows and last-click models often over-credit ads for sales that would have happened anyway. Blended ROAS — total revenue divided by total ad spend across all channels, measured independently of any single platform's dashboard — is the more honest number, and the one worth tracking over time even if it's less flattering than any individual platform's self-reported figure.

CAC Payback Period

Customer Acquisition Cost (CAC) payback period asks a related but different question: how many months of a customer's margin does it take to recoup what was spent acquiring them? A low CAC combined with a long payback period (common with subscription businesses collecting margin gradually) tells a different story than a high CAC with fast payback (common with one-time-purchase businesses). Both can be healthy — the point is knowing which situation applies before judging any single ad spend decision.

Exact per-platform ROAS benchmarks change constantly and vary hugely by industry, so treat any number quoted as "average ROAS on X platform" with real skepticism unless it's specific to your own account. The formula above — break-even ROAS from your own margin — is the one number that stays true regardless of platform, format, or year.