Free
$0
Use the working bounded app first. No signup gate and no forced upgrade before value.
Use free app Ecommerce apps
Ecommerce · paid acquisition · unit economics
Ecommerce Break-Even ROAS & CPA Calculator
Calculate contribution margin, break-even return on ad spend and maximum break-even customer acquisition cost from your own price, product cost, fulfilment, payment fee and refund assumptions.
$0 · no signupBrowser localNo store credentials$5 / $50 / $99
Primary query: break even ROAS calculator ecommerce maximum CPA calculator · Updated 2026-09-07
Immediate answer
Find the expensive exception before it spreads.
Enter one order scenario to calculate contribution before advertising, contribution margin, break-even ROAS and maximum break-even CPA. The calculator makes the assumptions visible so you can test price, cost, fulfilment, payment-fee and refund-rate changes instead of relying on a generic target ROAS.
Free browser-local input
No account connection. No password. No API token. Inputs and calculations stay in this page.
Result
SCENARIO READYBreak-even ROAS: 1.97x
Expected revenue after refunds $70.40 · contribution before ads $35.78 · contribution margin 50.8% · maximum break-even CPA $35.78.
Free first · exactly three paid steps
$0 → $5 → $50 → $99
Run Ecommerce Break-Even ROAS & CPA Calculator before paying. The three paid tiers buy bounded written proof, diagnosis or an action pack; they do not silently imply a subscription, deployment, certification or legal/compliance decision.
Paid Proof
$5
A bounded fit / no-fit check plus one concrete blocker or next step.
Bounded deliverable with a product-specific reference.
Buy $5 proofDiagnostic
$50
Up to three evidence-backed findings and a prioritised action path.
Bounded deliverable with a product-specific reference.
Buy $50 proofAction Pack
$99
Up to five prioritised actions plus an acceptance checklist for the next implementation step.
Bounded deliverable with a product-specific reference.
Buy $99 proofSafe intake: do not send passwords, secrets, production credentials, private customer data or sensitive files through the generic proof checkout. Exact scope is confirmed before substantive paid work begins.
Truth boundary
- — This is scenario math, not accounting, tax, media-buying or profitability advice.
- — Real blended acquisition economics can include repeat purchases, discounts, chargebacks, taxes, overhead, attribution error and channel-specific fees not modeled here.
Free diagnosis → recurring protection
Do not pay monthly for a one-off calculation.
Use the free app first. Move to a recurring product only when the same storefront or revenue failure needs repeated monitoring.