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Ad Scaling System · Calculator

Know your exact ROAS floor and max safe CPA before you touch your ad budget

A 4-tab live calculator and reference guide that replaces gut feel with specific numbers. Break-even ROAS, CPA limits, budget safety rules, and creative rotation timing — in one tool.

$17One-time · Instant access
Interactive HTML calculator + printable PDF reference · 30-day refund guarantee

Most ad accounts are run on a mix of platform ROAS, gut feel, and the vague sense that things are going well. Until suddenly they aren't.

  • You're scaling based on platform ROAS — which is 20–30% higher than what Shopify actually attributes
  • You don't know the specific number below which every sale loses money
  • You've killed campaigns too early — and scaled ones that were never actually profitable
  • Your creative goes stale and you don't know when to rotate it versus when the audience is saturated
  • You make budget decisions on a Friday afternoon based on a week that doesn't reflect Monday's numbers

These are not strategy problems. They are measurement problems. This tool solves them with four formulas and a set of rules that take 90 seconds to check.

What's inside — 4 tabs
1
Break-Even ROAS Calculator
Enter your AOV, COGS, processing fees, and refund rate. Get your break-even ROAS, scale target, revenue margin per order, and max profitable CAC — live as you type.
2
CPA & Budget Safety Calculator
Break-even CPA at your target margin. Max safe weekly ad spend based on bank balance. Cash runway indicator with green/amber/red status.
3
Weekly Decision Rules — Quick Check
Enter this week's ROAS, refund rate, AOV, CAC, and balance. Get an instant verdict on each of 5 non-negotiable rules: Scale / Hold / Pause / Act — with the exact action mapped.
4
Creative Rotation Protocol
Rotation rules by spend level. Day-by-day rotation schedule. Fatigue threshold reference (Meta cold: 3.5, TikTok cold: 4.0). Add and track individual creatives with rotation status.
Also included — printable PDF
→
Ad Spend Audit Reference PDF
All formulas, the 5 decision rules, and the creative rotation protocol in a print-ready format with fill-in-your-numbers fields. Tape it next to your monitor.
What the formulas look like
Break-Even ROAS = AOV ÷ (AOV − COGS − Processing − Refund Reserve)
Min Scalable ROAS = Break-Even ROAS × 1.3
Max Safe CPA = Gross Margin × 0.80
Max Weekly Spend = Bank Balance × 0.30
The 5 weekly decision rules
✗
ROAS below break-even for 3 days → Pause
Diagnose creative. Not the product.
✓
ROAS above 3.0× for 5 days → Scale +20%
Repeat every 3 days while above threshold.
✗
Refund rate above 13% → Freeze acquisition
Fix fulfillment before spending another dollar.
⚠
AOV below $60 → Audit bundle visibility
Usually a checkout change or mobile rendering issue.
⚠
CAC above $45 → Audit creative and audience
Top-of-funnel problem, not product page.
Who it's for
"I didn't realise my break-even ROAS was 2.1× — I'd been celebrating 1.8× as a win. The calculator showed me I'd been running at a loss for 6 weeks."
— Media buyer, fashion accessories
The upgrade path
Where this fits in the full system
$17 Ad Template ← you are here→$57 Ad Playbook→$149 Ad Command Center

Know your numbers before your next budget decision.

The operators who scale consistently are not the ones with the best instincts. They're the ones who check four numbers before touching a budget.

Get the Ad Spend Audit Template — $17 → Also: Profit Recovery Checklist — $9
30-day refund guarantee · Instant download · No subscription

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