Free break-even ROAS calculator
Stop scaling past your contribution-margin floor
Shareable break-even ROAS for Meta, Google & Amazon — from real contribution margin (returns, payment fees, fulfillment), not vanity 1÷gross-margin math.
Real costs, not just COGS
Toggle returns, payment fees, pick-pack, and shipping so your floor matches the P&L.
One-click share link
Encode the scenario in the URL — send to a client or partner with no login.
$19 client brief
Multi-SKU CSV + print-ready Client Brief. Not another $9/mo store connect.
Try the Shopify DTC demo
Pre-filled so you can see why a “healthy” 3.0x ROAS can still lose money.
Real costs (returns, payment, fulfillment)
Formula: contribution = price − COGS − payment − fulfillment − shipping − (price × return%). BE-ROAS = 1 ÷ CM%. BE-ACoS = CM%.
Optional MER scenario (not SEO bait)
MER (marketing efficiency ratio) ≈ total revenue ÷ total ad spend across channels. Use BE-ROAS as the floor for paid channels; MER is a blended health check when attribution is messy — not a substitute for unit economics.
Pricing
Free calculator
- Single SKU contribution → BE-ROAS / BE-ACoS
- Copy share link
- No account
Campaign Brief Pack
- Multi-SKU table → CSV download
- Shareable scenario URLs
- Client Brief print → PDF
Checkout link pending — set lemon_squeezy_checkout_url in config.json after creating the Lemon Squeezy product.
Open pack workspace (delivery UI is live; payment link wires when LS URL is set)
Frequently asked questions
What is break-even ROAS?
Break-even ROAS is 1 divided by your contribution margin percentage. If CM% is 33%, BE-ROAS ≈ 3.03x. Below that ROAS, paid orders lose money after variable costs.
What is break-even ACoS?
Break-even ACoS equals your contribution margin percentage. If CM% is 25%, you can spend up to 25% ACoS on Amazon before contribution goes negative.
How is this different from 1 ÷ gross margin?
Gross margin ignores returns, payment fees, fulfillment, and shipping you absorb. Those often move the floor from “looks like 2.5x” to “actually 3.5x+”.
Do I need an account?
No. The free calculator runs in your browser. Copy a share link to send the same scenario to a teammate or client.
What is the $19 Campaign Brief Pack?
A one-time pack for multi-SKU CSV export, shareable scenario URLs, and a print-ready Client Brief page (browser Print → PDF). Not a Shopify subscription.
Facebook / Meta break-even ROAS?
Same math. Enter contribution costs, then set Meta Advantage+ or campaign Target ROAS at or above BE-ROAS (plus optional target profit).
Lock your floor before you scale
Facebook / Meta, Google, and Amazon break-even in one desk.
Calculate break-even ROAS