What Is Break-Even ROAS and How Do You Calculate It?
Break-even ROAS is the minimum return on ad spend your business needs to avoid losing money on a sale. If your ads generate less than that number, you are paying to acquire revenue that does not cover your costs. If they generate more, you have room for contribution after ad spend. For e-commerce teams, this is the first paid-media number to know cold. A reported 3x ROAS can be strong for one store and unworkable for another because margins, shipping, fees, and refunds are different. If you want to run the math with your own numbers, start with the OnSumo break-even ROAS calculator.
What is ROAS?
ROAS is revenue divided by ad spend, so it tells you how many dollars of revenue you generated for each dollar spent on ads. If you spend $1,000 on ads and generate $4,000 in tracked revenue, your ROAS is 4.0. That means every $1 in ad spend produced $4 in revenue. The important catch is that ROAS is a revenue efficiency metric, not a profit metric. It says nothing about your product cost, shipping cost, payment processing, or refund rate. Google's target ROAS bidding documentation frames ROAS as conversion value per unit of spend, which is useful for campaign bidding but still separate from unit economics. That is why a store can hit a "good" platform ROAS number and still lose money.
What is break-even ROAS?
Break-even ROAS is the exact ROAS threshold where gross profit before ad spend is just enough to pay for the ad that generated the order. At break-even, profit after ad spend equals zero. You are not making money, but you are not losing it either. This makes break-even ROAS the line between acceptable acquisition and destructive acquisition. In plain terms: - Above break-even ROAS: the order still has money left after ad spend - At break-even ROAS: the order covers itself exactly - Below break-even ROAS: the order loses money This is why margin matters more than vanity benchmarks. A store with a 20% contribution margin needs a much higher ROAS floor than a store with a 50% contribution margin.
Break-even ROAS formula
Break-even ROAS is 1 divided by your contribution margin, or selling price divided by pre-ad contribution per order. You can write it two ways: 1. Break-even ROAS = 1 / contribution margin 2. Break-even ROAS = revenue per order / contribution profit before ad spend Contribution profit before ad spend usually looks like this: Selling price - COGS - shipping and fulfillment - payment fees - expected refunds and returns And contribution margin is: Contribution profit before ad spend / selling price Example: - Selling price: $100 - COGS: $35 - Shipping and fulfillment: $12 - Payment fees: $3 - Expected refunds: $10 Pre-ad contribution profit = $100 - $35 - $12 - $3 - $10 = $40 Contribution margin = $40 / $100 = 0.40 Break-even ROAS = 1 / 0.40 = 2.5 That means your ads need to produce at least $2.50 in revenue for every $1 spent before the order stops losing money.
Worked example with a 40% margin
If your contribution margin is 40%, your break-even ROAS is 2.5x. Here is the same example in operating terms. Say you sell a product for $100 and keep $40 after variable costs but before ad spend. That $40 is the pool available to pay for customer acquisition. If you buy one order with: - $10 in ad spend, revenue is $25 at a 2.5x ROAS - $20 in ad spend, revenue is $50 at a 2.5x ROAS - $40 in ad spend, revenue is $100 at a 2.5x ROAS That last line is the easiest to visualize. At a $100 order value and a 40% pre-ad contribution margin, you have $40 available for ads. Spend exactly $40 to acquire that order and you break even. Since $100 / $40 = 2.5, the required ROAS is 2.5x. Here is how margin changes the target: This is the core reason generic advice like "you need a 3x ROAS" is weak. For one business, 3x is profitable. For another, it is still below break-even.
| Contribution margin | Break-even ROAS |
|---|---|
| 20% | 5.0x |
| 30% | 3.33x |
| 40% | 2.5x |
| 50% | 2.0x |
| 60% | 1.67x |
How to use the OnSumo break-even ROAS calculator
Use the calculator by entering the variable costs that reduce what is left to pay for ads, then compare the result to your channel ROAS. The OnSumo break-even ROAS calculator is built for that job. Enter your selling price, COGS, logistics or fulfillment cost, payment fees, and refund assumption. The tool converts those inputs into a break-even threshold you can use as a campaign guardrail. A simple workflow looks like this: 1. Pull your real average order value, not your list price. 2. Use landed COGS, not supplier invoice cost by itself. 3. Include fulfillment, shipping subsidies, payment processing, and expected refunds. 4. Read the break-even ROAS output. 5. Compare that number to actual channel ROAS from Meta, Google, or marketplace ads. If your store economics change with platform fees or subscription costs, pair this with the Shopify profit calculator. If you want to connect acquisition efficiency to payback and customer value, use the LTV / CAC ratio calculator. When setting retail prices, use the markup calculator to ensure your pricing structure supports the contribution margin targets you need to hit break-even ROAS.
What break-even ROAS does and does not include
Break-even ROAS usually covers variable costs first, not every fixed business expense. That distinction matters. Many operators use break-even ROAS as a contribution-margin gate for traffic decisions. It tells you whether the order can pay for its own acquisition based on per-order economics. It does not automatically include rent, salaries, software, or founder draw unless you intentionally add them into the cost model. That is not a flaw. It is the point. Break-even ROAS is most useful when it reflects the cost stack directly tied to an order. Once you know that floor, you can decide whether you need extra margin above it to cover overhead or profit targets.
Frequently Asked Questions
What is a good ROAS?
A good ROAS is any ROAS that is safely above your break-even threshold, not a universal benchmark like 3x or 4x. If your break-even ROAS is 2.1x, then 3.0x may be healthy. If your break-even ROAS is 4.2x, then 3.0x is a loss. Always judge ROAS against your own margin structure.
How does margin affect break-even ROAS?
Higher margins lower the ROAS you need to break even, while lower margins raise it. The relationship is direct because break-even ROAS is the inverse of contribution margin. A 50% margin gives you a 2.0x break-even ROAS. A 25% margin gives you a 4.0x break-even ROAS. When margins compress, paid acquisition gets harder immediately.
What if my ROAS is below break-even?
If ROAS is below break-even, your ads are buying revenue at a loss. At that point you need to change one of the inputs: lower acquisition cost, raise average order value, improve conversion rate, increase price, reduce variable costs, or pause the campaign. The right fix depends on which lever moves fastest in your business, but the math itself is simple: below break-even means negative contribution after ad spend.