Meta & Google Ads Breakeven ROAS Calculator

Know your exact minimum Return on Ad Spend (ROAS) and Maximum Allowable CAC before scaling paid traffic on Meta, Google, or TikTok.

Average Order Value (AOV)

Product Cost / COGS (%)

Processing & Shipping Fees (%)

Target Net Profit Margin (%)

Minimum Breakeven ROAS

1.61x

Zero profit / zero loss threshold

Target Profit ROAS

2.38x

Hits your exact target net profit margin

Maximum Allowable CAC

$52.70

Maximum ad spend per customer acquisition

Struggling to Hit Your Target ROAS? Claim Free Audit →

What Is Breakeven ROAS and Why Does It Matter?

In paid media acquisition across Meta Ads, Google Ads, and TikTok Ads, ROAS (Return on Ad Spend) measures the gross revenue generated for every dollar spent on advertising. However, looking at ROAS in a vacuum without factoring your unit economics is the fastest way to burn through cash.

Your Breakeven ROAS is the exact multiplier where your paid campaign generates enough revenue to cover product cost of goods sold (COGS), payment processing fees (Stripe, PayPal, Shopify Payments), pick-and-pack shipping expenses, and ad spend — leaving you with exactly $0 in net profit and $0 in net loss.

The Mathematical Formula

Breakeven ROAS = 1 / Gross Profit Margin Percentage

Example: If your Gross Margin is 60% (0.60), your Breakeven ROAS is 1 / 0.60 = 1.67x. Any ROAS above 1.67x generates pure profit.

Breakeven ROAS vs Target ROAS: The Vital Distinction

Many media buyers mistakenly treat Breakeven ROAS as their primary campaign goal. If your media buyer is reporting a 1.70x ROAS when your breakeven threshold is 1.65x, your business is barely surviving on razor-thin margins after operating overhead, team payroll, and tax liabilities.

Your Target ROAS factors in your desired net operating profit margin before setting campaign bidding parameters:

Target Profit ROAS Formula

Target ROAS = 1 / (Gross Margin % − Target Net Profit %)

Example: With a 62% Gross Margin and a 20% Net Profit target, your required Target ROAS is 1 / (0.62 − 0.20) = 1 / 0.42 = 2.38x.

Understanding Maximum Allowable CAC (Customer Acquisition Cost)

While ROAS is a revenue multiple, CAC (Customer Acquisition Cost) is a fixed dollar amount. In algorithmically optimized bidding environments like Meta Advantage+ and Google Performance Max, knowing your Maximum Allowable CAC is essential for setting cost caps and bid caps:

If your Average Order Value (AOV) is $100 and your combined COGS and fulfillment fees equal $40 (40%), your gross margin per order is $60. Your Maximum Allowable CAC is therefore $60. If your blended cost per purchase exceeds $60, you lose money on every order unless your back-end retention and email flows generate repeat purchases within 60 days.

Scale Paid Ads with Predictable Margins

At Zelobiz, we manage high-growth Meta, Google, and TikTok ad accounts for DTC and B2B brands. If your current advertising agency is optimizing for vanity metrics while your net profit margins shrink, claim our free 15-minute ad account audit below.