Calculate true break-even ROAS, max allowable CPA, and post-ad net profit per SKU across Meta, TikTok, and Google Ads in 100% local browser RAM.
True Break-Even ROAS, Max Allowable CPA & Post-Ad Net Profit Waterfall
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=SUMIFS(break_gross, SKU, A2) - VLOOKUP(A2, break_fees!A:D, 4, FALSE)⚠️ Why Manual Formulas Fail at Scale: Manual spreadsheet formulas break on multi-row break even adjustments, tiered fees, and CSV delimiter shifts.
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Go beyond naive '1 / Gross Margin' formulas. Automatically deduct Stripe/Shopify Payments fees (2.9% + $0.30), 3PL fulfillment, and non-recoverable return losses.
A 20% discount code doesn't raise break-even ROAS by 20%—it often spikes required ROAS from 1.65x to 2.45x. Model promo elasticity before launching sales.
Outputs exact maximum allowable CPA and 20%-net-margin target CPA per SKU so media buyers can set hard bid caps with confidence.
Never grant read-access to your Shopify orders or Meta Ads pixels. Every unit economics model runs 100% locally in your browser RAM.
Zero configuration, zero cloud server dependencies, instant execution.
Load your SKU-level average order value, true landed product cost, shipping cost, and historical return percentage.
Drag the discount slider to see real-time Break-Even ROAS, Max CPA, and per-order net profit vs actual ad ROAS.
Download your full campaign ROAS threshold matrix to cut bleeding ad sets and scale high-contribution winners.
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| Feature / Metric | 🛡️ RoasMargin Studio | ☁️ Cloud SaaS (TripleWhale) |
|---|---|---|
| Pricing Model 💳 | 🛡️ $19 One-Time Lifetime Buyout (€3.99 Pass) | ☁️ $129–$329/mo Tiered GMV Subscription |
| Store & Ad Account Privacy 🔒 | 🛡️ 100% Local Browser RAM (Zero Pixel/OAuth) | ☁️ Requires Full Shopify & Meta Ads API Access |
| Refund & Gateway Fee Accuracy 🧮 | 🛡️ Deducts 2.9%+$0.30, 3PL & Return Rate | ☁️ Often Uses Gross Product Margin Only |
| BFCM Promo Stress Testing 📉 | 🛡️ 50ms Interactive Discount Slider | ☁️ Static Post-Mortem Reporting Only |
Eliminate vendor lock-in and cloud upload security risks.
Independent Shopify and TikTok Shop sellers don't need a $129/mo dashboard just to calculate SKU-level break-even ROAS and max CPA.
Ad platform ROAS ignores 2.9%+$0.30 gateway fees, free-shipping costs, and 10%+ return rates—causing sellers to scale net-negative campaigns.
Cloud profit apps demand full read access to your customer orders, supplier COGS, and ad creatives.
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True Break-Even ROAS equals Effective AOV divided by Pre-Ad Contribution Margin per Order (Effective AOV minus Landed COGS, Shipping & 3PL Fulfillment, Payment Gateway Fees of 2.9% + $0.30, and Expected Return Loss). For example, on a $60 AOV with $30 total variable costs, Break-Even ROAS is $60 / $30 = 2.00x.
Because a 20% discount comes directly out of your net contribution margin while your COGS and shipping costs stay fixed. On a $100 product with $50 variable costs (2.0x break-even ROAS), a 20% discount drops revenue to $80 and margin to $30, pushing Break-Even ROAS up to 2.67x.
Max Allowable (Break-Even) CPA is the exact dollar amount of contribution margin left on an order before ad spend (e.g., $28.50). Break-Even ROAS is simply AOV divided by that Max CPA.
When a customer refunds an order, you lose the revenue and often eat the outbound shipping and fulfillment fee. Including an 8%–15% refund buffer in your unit economics prevents overestimating campaign profitability.
No. RoasMargin Studio runs 100% locally inside your browser RAM. You never connect OAuth tokens or upload confidential store data to any external server.
Instead of charging $49 to $129+ every month for cloud attribution dashboards, RoasMargin Studio gives you an instant, zero-subscription $19 lifetime calculator for SKU-level Break-Even ROAS, Max CPA, and promo discount stress-testing.