Know your floor before you spend a dollar on ads.
Find the minimum ROAS your ad campaigns need to hit before you lose money.
Return on Ad Spend (ROAS) measures the revenue generated from every dollar spent on advertising. Your break-even ROAS is the minimum performance threshold — where revenue from a campaign exactly covers the cost of running it plus the cost of fulfilling each order.
This means for every $1 spent on ads you need at least $1.82 in revenue to cover costs. You can pay up to $55 to acquire a customer at break-even.
Getting your break-even ROAS wrong — in either direction — costs you money.
If you assume break-even is 2.0x but the real number is 2.13x, you'll unknowingly lose money on every order. A campaign that looks profitable is actually bleeding cash — and you won't know until it's too late.
If you assume break-even is 2.5x but the real number is 2.13x, you'll shut down campaigns that are actually making money. You'll leave significant profit on the table and lose ground to competitors who know their real numbers.
The formula is simple. Three numbers. That's all you need.
Find your Average Order Value. Pull this from Shopify analytics — it's total revenue divided by total orders over the last 90 days.
Calculate your cost of goods sold per order. This is what you pay for the product itself — manufacturing, wholesale cost, or raw materials. Enter it as a dollar amount or a percentage of AOV.
Add up your other variable costs per order. Shipping, packaging, payment processing fees, fulfillment labor. Anything that scales with each sale.
Plug those numbers into the formula above. Or just use the calculator at the top of this page.
A store with a $75 AOV, $25 in product costs, and $8 in variable costs:
That means every ad campaign needs to return at least $1.79 in revenue for every $1 spent. Anything below that and you're losing money on every sale.
These two metrics measure the same thing from different angles. Most advertisers only track one. You should know both.
Break-even ROAS answers: "How much revenue do I need per dollar of ad spend?" It's a ratio. If your break-even ROAS is 2.0, you need $2 in revenue for every $1 in ads.
Break-even CPA answers: "What's the most I can pay to acquire one customer?" It's a dollar amount. If your break-even CPA is $55, any customer acquisition cost above that loses money.
The calculator above gives you both numbers instantly.
There is no universal answer. Anyone telling you "a good ROAS is 4x" doesn't know your margins.
Your break-even ROAS depends entirely on your cost structure. A supplement brand with 80% margins might break even at 1.25x. A furniture store with 35% margins needs 2.86x just to cover costs.
The goal isn't the lowest possible break-even ROAS. The goal is knowing YOUR number so you can make decisions based on math instead of guessing.
Factor in repeat purchases to unlock a more aggressive — and more accurate — acquisition target.
The most overlooked metric in paid advertising is Customer Lifetime Value. Most marketers only consider the first purchase when calculating acquisition costs — but customers buy more than once. When you factor in repeat purchases, your true break-even ROAS drops significantly, unlocking room to acquire customers that competitors can't afford.
A first-order break-even ROAS of 0.57 means you can lose money on the first sale and still break even across the full customer relationship. That changes everything about how aggressively you can acquire customers.
The hard truth: You are competing against businesses that understand this equation. If they are willing to spend more to acquire a customer than you are, they will win every time. Make it a goal to increase your CLV through email marketing, SMS, and increasing your average order value.
Quick answers to the questions ecommerce brands ask before setting ROAS and CPA targets.
Break-even ROAS is the minimum return on ad spend your campaigns need to hit before you start losing money. It's calculated by dividing your average order value by your profit per order. If your break-even ROAS is 1.82, every dollar you spend on ads needs to generate at least $1.82 in revenue just to cover costs.
Break-Even ROAS = Average Order Value / (Average Order Value − Cost of Goods Sold − Other Variable Costs). For example: $100 AOV, $40 COGS, $5 variable costs = $100 / $55 = 1.82 break-even ROAS.
Break-even ROAS measures the minimum revenue-to-ad-spend ratio. Break-even CPA is the maximum dollar amount you can pay to acquire one customer. They measure the same profitability threshold from different angles. ROAS is a ratio, CPA is a dollar amount.
It depends on your margins. A store with 70% margins breaks even at 1.4x ROAS. A store with 30% margins needs 3.3x. There's no universal benchmark. The only number that matters is the one based on your actual costs.
When you factor in repeat purchases, your break-even ROAS drops. If customers buy 2.75 times on average, you can lose money on the first sale and still profit over the full relationship. This lets you outbid competitors who only optimize for first-order profitability.
Break-even ROAS is your floor — the minimum before you lose money. Target ROAS is your goal — set above break-even to ensure profit. Know your floor first, then set your target based on how much profit margin you want per sale.
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