What Is a Good ROAS for Ecommerce?

ROAS (return on ad spend) measures how much revenue each dollar of advertising generates. It is the single most-quoted number in ecommerce advertising — and the most misunderstood.

The trap is that ROAS measures revenue, not profit. A 4.0x ROAS sounds healthy, but if your product carries a 25% gross margin, that revenue barely covers the cost of goods and the ad — leaving almost nothing for shipping, overhead, or profit. That is why "what is a good ROAS" can only be answered relative to your own economics.

A good ROAS is one that clears your breakeven point and leaves the contribution margin you need. For a high-margin brand (digital products, premium DTC), a 2.0–2.5x ROAS can be very profitable. For a low-margin, high-COGS store, even 4.0x may lose money once shipping and fees are included. The benchmark that matters is yours.

• Gross margin is the biggest driver — higher margin means a lower ROAS is acceptable.
• Average order value and shipping costs shift the math per order.
• New-customer acquisition can run at a lower ROAS if lifetime value justifies it.
• Prospecting (cold) campaigns naturally show lower ROAS than retargeting warm audiences.

Breakeven ROAS is the point where the gross profit from a sale exactly equals the ad cost that produced it. The formula is simply the inverse of your gross margin.

Use your true gross margin — revenue minus cost of goods, payment fees, and per-order shipping — not the markup you wish you had. If you don't know your blended gross margin, that is the first number to fix; everything downstream depends on it.

Breakeven is the floor, not the goal. Your target ROAS builds in the contribution margin you want after advertising. Work backward from the profit you need.

1. 1

   Calculate true gross margin

   Subtract COGS, payment processing, and fulfillment from revenue to get gross profit, then divide by revenue.

2. 2

   Find breakeven ROAS

   Divide 1 by your gross margin. This is the line below which campaigns lose money.

3. 3

   Add your target contribution

   Decide how much profit you want per order after ads (e.g. 15%). Raise the target ROAS until the math leaves that margin.

4. 4

   Split targets by funnel stage

   Allow prospecting to run nearer breakeven while holding retargeting and brand search to higher returns.

5. 5

   Re-check monthly

   Margins, shipping costs, and AOV drift. Recompute your breakeven and target on a regular cadence.

Meta and Google each report ROAS using their own attribution — counting conversions they believe they influenced, often with generous click and view-through windows. When several platforms claim the same sale, their ROAS figures add up to more revenue than your store actually made.

The antidote is blended ROAS: total revenue divided by total ad spend across every channel. It can't be double-counted and tracks much closer to your real P&L. Use platform ROAS to optimize within a channel, and blended ROAS to judge whether spend is genuinely profitable.

Cutting spend can raise ROAS while shrinking total profit — the opposite of growth. Durable improvements come from the inputs underneath ROAS:

• Raise average order value with bundles, thresholds, and post-purchase upsells.
• Improve on-site conversion rate so the same ad traffic produces more orders.
• Shift budget toward higher-margin products instead of revenue at any cost.
• Refresh creative before fatigue drives CPMs and CPAs up.
• Tighten audience and placement targeting to cut wasted impressions.