Break-Even Solver • Real Net Profit v2.6 • 100% Client-Side RAM
AD SPEND & ECOMMERCE ECONOMICS

Free ROAS Calculator (Break-Even & Ad Profit)

Determine true campaign profitability accounting for product COGS, payment merchant cuts, shipping expenses, and real break-even ad return thresholds.

$
Retail price paid by the customer per order.
$
Supplier manufacturing, raw materials, or wholesale cost.
$
Postage courier delivery, boxes, and 3PL fulfillment.
%
Expected returns, chargebacks, and damaged replacements.
Deduct merchant fee from contribution margin.
18%
Desired real profit margin retained after all ad spend.
Break-Even ROAS
1.67x
Zero Loss Threshold
Target ROAS
2.39x
For 18% Net Margin
Max Cost Per Customer (CAC)
$47.31
Top CPA Limit
Net Profit / Order
+$14.22
18.0% Net Margin
Contribution Margin (pre-ads): $47.31 (59.9%)
Payment Gateway Cut: -$2.59
Return & Refund Allowance: -$1.78
Target Blended MER: 1.75x
Customer Revenue Allocation Waterfall 100% Accounted
Net Profit (18.0%) Allowable Ads (41.9%) COGS (26.6%) Shipping (10.8%)
E-COMMERCE PROFIT METRICS

Spot True Net Profit, Stop Ad Spend Leaks

High dashboard ROAS doesn't mean profit if product costs, shipping, and payment fees eat your margins. Calculate true breakeven metrics, blended CAC, and net margin before scaling ad budgets.

METRIC ACCURACY AUDIT

Why High Ad Dashboard ROAS Can Still Lose Money

Ad platforms celebrate a 3.0x ROAS, but if your product cost is 40% and shipping is 15%, you could be operating at a severe net loss. ZeroTool calculates your actual bottom-line cash profit after every expense.

Gross vs Net Realities — Separates ad platform vanity revenue from actual after-tax net profit
Real Cost Deductions — Accounts for COGS, shipping subsidies, returns, and merchant gateway fees
Break-Even Threshold Target — Finds the exact minimum ROAS required to avoid paying to acquire customers
Calculate Net Profit

Profit Formulation

Break-Even & Net Return

Real Net Cash
Total Ad Spend: $5,000.00
Gross Ad Revenue (3.0x): $15,000.00
Product COGS & Shipping: -$7,150.00
True Net Cash Profit: +$2,850.00 (1.57x Net)
Break-Even Margin Met

Unit Economics

Per-Order Margin Breakdown

58.7% Contribution
Average Order Value (AOV): $49.00
Manufacturing COGS: -$14.20
Shipping & Gateway Fees: -$6.02
Net Contribution Margin: $28.78 (58.7%)
True Landed Costs Factored
UNIT ECONOMICS BREAKDOWN

Subtract Product Cost, Packaging, Shipping & Fees

Every e-commerce sale incurs hidden deductions: merchant processing fees (2.9% + $0.30), box packaging, pick-and-pack fulfillment, and localized shipping subsidies. Map your true contribution margin before spending ad dollars.

True Landed Product Costs — Includes manufacturing, freight importation, and custom packaging boxes
Gateway Processing Fees — Deducts Stripe, PayPal, and Shopify payment transaction cuts
Return Rate Protection — Incorporates estimated 5% to 10% refund reserves into profit ceilings
Explore Unit Deductions
CAMPAIGN SCALING CONTROLS

Calculate Blended CAC & Scaling Ceilings

When scaling ad budgets across Meta, Google, and TikTok, acquisition costs naturally rise. Knowing your maximum allowable CAC ensures you pause deteriorating ad sets before they burn quarterly profits.

Blended Customer Acquisition Cost — Combines paid Meta, Google, and TikTok spend across total new orders
Maximum Allowable CAC — Calculates the upper limit you can pay per acquisition before losing money
Multi-Tier Scenario Planning — Test scale targets from $500/day to $10,000/day with real-time feedback
Explore Scaling Limits

CAC Threshold Engine

Acquisition Margin Safety Net

Safe to Scale
Current Paid CAC: $21.40
Maximum Allowable CAC: $28.50
Profit Buffer per Order: +$7.10
Scaling Recommendation: Scale +20% Budget
$7.10 Margin Cushion Intact

Marketing Privacy

100% Local In-Browser Processing

Zero Tracking
Campaign Revenue Data: Browser RAM Only
Third-Party Tracking Pixels: Zero / Completely Air-Gapped
Remote Server Ingestion: 0 Bytes Transmitted
Competitor Telemetry Impossible
AIR-GAPPED CAMPAIGN PRIVACY

100% Private on Your Device — No Ad Data Tracked

Your store revenue, cost of goods, and ad spend figures are highly confidential commercial assets. ZeroTool runs all mathematical modeling locally without cloud transmission or tracking pixels.

Zero Pixel Spying — We never track your marketing budget, store conversion rates, or margins
Local-First Processing — All mathematical modeling executes in browser memory with zero network calls
Complete Data Evaporation — Financial numbers clear instantly upon closing or refreshing your browser tab
Explore Privacy Architecture
3-Step Quick Guide

How to Use ROAS & CAC Calculator

Uncover true advertising profitability in three simple steps.

01

Enter Ad Spend & Revenue

Input total campaign spend and generated sales across your active advertising channels.

02

Deduct Real Costs

Include product manufacturing cost (COGS), shipping subsidies, and payment gateway percentages.

03

Scale Profitably

Review your break-even ROAS and max allowable CAC to know with certainty whether to scale or cut spend.

Zero-Server Privacy Guarantee

Your Files Never Touch Our Servers

All financial formulas, ad spend models, conversion numbers, and profit analyses run strictly in your browser RAM. Zero commercial telemetry is transmitted or logged.

100% Client-Side 0 Logs Recorded
Help & Frequently Asked Questions

Common Questions About ROAS & CAC Calculator

Key metrics for profitable e-commerce advertising.

What is the difference between ROAS and ROI?

ROAS (Return on Ad Spend) measures gross revenue divided by ad spend alone. ROI (Return on Investment) considers all business costs, including product COGS, shipping, and payment fees, revealing whether the campaign actually yielded net cash profit.

How do I determine my Break-Even ROAS?

Break-Even ROAS = 1 / Profit Margin Percentage. For example, if your net profit margin before advertising is 40% (0.40), your break-even ROAS is 1 / 0.40 = 2.50x. Any ROAS below 2.5x loses money on the front end.

Are my store financial figures tracked or saved?

Never. ZeroTool operates with zero cloud transmission. All mathematical models run strictly within your local browser memory partition, ensuring complete secrecy for your commercial data.

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