--- title: "Break Even ROAS: Formula and Calculator | MarginFix" description: "Break even ROAS is 1 divided by your contribution margin rate. Find the return your ads need before they add a dollar of profit, with a free calculator." url: https://marginfix.ai/glossary/break-even-roas/ lastmod: 2026-10-13 --- Your number See this page in your own figures: industry, spend and the estimated leak. [Run the estimator →](/estimator/) [Home](/) › [Glossary](/glossary/) › Break even ROAS Glossary · Paid media # Break even ROAS Break even ROAS is 1 divided by your contribution margin rate: the return your ads need before they add a dollar of profit. - Reviewed Oct 2026 - 3 min read - Part of the 15 term glossary - Median finding $58k a year across 74 audits 01 ## What break even ROAS means Break even ROAS is the return on ad spend at which an order's contribution margin exactly pays for the ads that won it. The formula is 1 divided by the contribution margin rate: an order that keeps 40% of its revenue after variable costs breaks even at 2.5×, and one that keeps 25% needs 4.0×. [Contribution margin](/glossary/contribution-margin/) is revenue minus the costs that grow with each order: the product cost, shipping and packaging, payment fees, pick and pack, marketplace fees and the returns you expect. Fixed costs such as rent and salaries stay out, because one more order does not change them. 02 ## The break even ROAS formula and calculator The formula, an illustration, and a calculator that runs it on your own figures. Break even ROAS = 1 ÷ **contribution margin rate** Worked example *Illustration, not a client figure* If an order of $100 leaves $40 after its variable costs, every $1 of ads must bring back $2.50 of revenue before the order adds any profit: a break even ROAS of 2.5×. Your own break even ROAS Order value ($) Variable costs per order ($) Profit target after ads, % of order value (optional) Enter the order value and the variable costs per order to read your own break even. It is your number, not an audited one. The calculator runs in your browser. Nothing you type is sent anywhere. Break even ROAS by contribution margin | Contribution margin | Break even ROAS | | --- | --- | | 60% | 1.67× | | 50% | 2.0× | | 40% | 2.5× | | 30% | 3.33× | | 25% | 4.0× | | 20% | 5.0× | 03 ## Gross margin is not enough Many teams plug gross margin into the formula, which counts only the product cost. That understates the return they need. NYU Stern's January 2026 data puts the average gross margin of US listed specialty retailers at 35.30%, which would suggest a break even near 2.8×. Shipping, payment fees and returns come out of that margin before the ads do, so the contribution margin is lower and the real break even is higher. 04 ## Break even ROAS and target ROAS Google defines target ROAS as “the average conversion value (for example, revenue) you'd like to get for each dollar you spend on ads,” and advises setting it on “what will yield the highest profit.” A target set at break even means the campaign makes no profit even if every reported sale is real. Most targets should sit above break even, by the profit you want per order. Reported sales are not always real. [Attribution inflation](/glossary/attribution-inflation/) showed up in 54% of our 74 published audits: the platforms claimed more revenue than the business recorded. Compute your ROAS on reconciled revenue (see [how to reconcile GA4 and ad platform revenue](/insights/reconcile-ga4-ad-platform-revenue/)) before you compare it with break even. And a sale the ads did not cause does not pay for them. As two Google UK analysts put it about a campaign returning £1.10 for every £1 of incremental spend: “While it's making a gain, it's only getting £0.10 back.” 05 ## Break even ROAS in the audited cases Published cases where orders were won or priced below break even, each with the audited annual figure. - /cases/scaling-spend-was-hiding-a-134k-annual-margin-leak/DTC / Ecommerce ### Scaling spend was hiding a $134k annual margin leak - +$134k a year, findings in 6 days. - Read the case → - /cases/fba-fees-and-returns-had-overtaken-the-margin-on-the-hero-as/DTC / Ecommerce ### FBA fees and returns had overtaken the margin on the hero ASINs - +$61k a year, findings in 6 days. - Read the case → - /cases/patient-acquisition-spend-ran-above-what-reimbursement-paid/Pharma ### Patient acquisition spend ran above what reimbursement paid - −$71k a year, findings in 7 days. - Read the case → - /cases/free-shipping-was-quietly-deleting-the-margin-on-every-third/DTC / Ecommerce ### Free shipping was quietly deleting the margin on every third order - +$47k a year, findings in 5 days. - Read the case → - /cases/bestsellers-were-priced-below-their-true-landed-cost/DTC / Ecommerce ### Bestsellers were priced below their true landed cost - +$59k a year, findings in 6 days. - Read the case → - /cases/free-assembly-and-delivery-were-bundled-below-cost-on-big-ti/Retail ### Free assembly and delivery were bundled below cost on big ticket lines - +$58k a year, findings in 6 days. - Read the case → 06 ## Terms and guides related to break even ROAS ### Related terms - [Contribution margin](/glossary/contribution-margin/) Revenue minus every variable cost per order or unit: cost of goods, shipping, payment fees, returns. - [Blended ROAS](/glossary/blended-roas/) Return on ad spend measured across every channel at once. - [MER](/glossary/mer/) Total revenue divided by total marketing spend, a blended, platform independent efficiency measure. - [Attribution inflation](/glossary/attribution-inflation/) When several platforms each claim the same sale, so attributed revenue adds up to more than 100% of actual revenue. - [Incrementality](/glossary/incrementality/) The share of conversions that happened because of the spend, against those that would have occurred anyway. - [CAC](/glossary/cac/) The fully loaded cost to win one customer: acquisition spend divided by new customers. - [Payback period](/glossary/payback-period/) The time for a customer's contribution margin to repay their acquisition cost. - [Margin leak](/glossary/margin-leak/) A recurring, usually invisible loss of marketing margin, whether wasted paid spend, mispriced offers or retention drop off, that a healthy looking blended metric conceals. ### Guides that use this term - [How to reconcile GA4 and ad platform revenue](/insights/reconcile-ga4-ad-platform-revenue/) Reconcile reported revenue to your orders before you set ROAS against break even. - [Your ROAS is lying to you](/insights/roas-attribution-field-guide/) Why a return on ad spend means nothing until it meets the margin. - [How to measure incrementality](/insights/how-to-measure-incrementality/) Why a sale the ads did not cause does not pay for them. - [Pricing audit: where discounts eat your margin](/insights/pricing-audit/) How a discount moves the contribution margin, and with it the break even. - [Google Ads audit checklist](/google-ads-audit-checklist/) Self scored checks, among them conversion values set from margin. - [Meta ads audit checklist](/meta-ads-audit-checklist/) Self scored checks, among them cost per purchase against contribution margin. 07 ## Questions about break even ROAS ### What is a good ROAS? Any ROAS above your break even, measured on revenue the ads actually caused. At a 40% contribution margin that means more than 2.5×; at 25% it means more than 4.0×. A ROAS that looks good on a platform can still lose money if the margin behind it is thin or the platform counts sales twice. ### Should break even ROAS use gross margin or contribution margin? Contribution margin. Gross margin leaves out shipping, payment fees, pick and pack and returns, which every order pays before the ads do. Using gross margin makes the break even look lower than it is. [Contribution margin, defined →](/glossary/contribution-margin/) ### What is the difference between break even ROAS and MER? Break even ROAS is a threshold for one channel or campaign, set by your margin. MER is total revenue divided by total marketing spend, a top line check that no platform can inflate. Compare MER with your break even to see whether marketing as a whole pays for itself. [MER, defined →](/glossary/mer/) ## Know the term. Now measure it in your own numbers. Break even ROAS, measured against your own accounts in 5 to 7 working days. $10k to $50k of findings, or your money back. [Book the audit](/book/) [Back to the glossary](/glossary/) Fixed fee. No retainer. NDA first. Go deeper ## Break even ROAS and the wider audit evidence - [All 15 terms The full glossary: every term with a formula and a worked example.](/glossary/) - [All 74 findings Ranked by annual value, $58k median, each one a real case.](/findings/) - [The benchmark Where 74 SMB marketing budgets leaked, by share of spend and by industry.](/benchmark/) - [Margin leaks The five leak patterns in depth: what each one is and how an audit finds it.](/margin-leaks/) - [Marketing audit checklist Thirty checks across paid media, attribution, pricing, retention and reporting.](/marketing-audit-checklist/) - [What an audit costs The 2026 market ranges with sources, against the fixed fee tiers.](/marketing-audit-cost/)