Break-Even ROAS
Calculator
Enter your product costs, fees, and return rate. Find your exact break-even ROAS, maximum CPA, ad cost limit, and net margin — instantly. Know what your campaigns must hit before you spend a dollar.
Pricing
Fulfilment
Platform & Payment Fees
Break-Even ROAS
Fill in your product details on the left — results update live.
Break-Even CPA
Max cost per sale
Net Margin
Before ad spend
Ad Cost Limit
Max ad spend / sale
Total Non-Ad Costs
Before ad spend
What is ROAS?
ROAS (Return on Ad Spend) is the most widely used metric for measuring ad campaign efficiency — but it tells only half the story.
ROAS defined
ROAS = Revenue ÷ Ad Spend. A ROAS of 4 means you generate $4 in revenue for every $1 spent on ads. It measures how efficiently your advertising generates sales — but does not account for product costs, fees, or returns.
Why ROAS alone misleads
A 4× ROAS sounds excellent. But if your product costs $40 and sells for $50, a 4× ROAS ($12.50 ad spend) leaves you with a loss after fees. High ROAS on a low-margin product can still mean losing money on every sale.
CPA vs ROAS
CPA (Cost Per Acquisition) is the dollar amount you pay to acquire one sale. It and ROAS are two sides of the same coin: CPA = Price ÷ ROAS. A $50 product at 4× ROAS = $12.50 CPA. Setting a CPA target is often easier when communicating with ad platforms.
What ROAS doesn't measure
ROAS ignores your product cost, shipping, platform fees, payment fees, and return rate. Two products with identical ROAS can have wildly different profitability depending on these costs. That's exactly what break-even ROAS accounts for.
ROAS in ad platforms
Meta Ads calls this metric "Purchase ROAS." Google Ads uses "Conv. value / cost." TikTok Ads reports it as ROAS directly. All platforms let you set target ROAS bidding — use your break-even ROAS as a hard floor when configuring these targets.
Blended vs campaign ROAS
Blended ROAS divides total revenue (including organic) by total ad spend. Campaign ROAS measures only attributed sales. Break-even ROAS applies to campaign ROAS — the metric your ad platform reports and optimises toward.
What is break-even ROAS?
Break-even ROAS is the minimum ROAS your campaigns must achieve for each sale to cover all costs — the number below which every sale loses money.
The formula
Break-Even ROAS = Selling Price ÷ Ad Cost Limit. Ad Cost Limit = Price − (Product Cost + Shipping + Platform Fee + Payment Fee + Return Cost). It's the amount left over after every non-ad cost — what you can afford to spend on ads while still breaking even.
How to use it
Set your break-even ROAS as the minimum target in your ad platform (Target ROAS bidding, manual CPA caps). If your actual ROAS consistently exceeds break-even ROAS, you're profitable. If it falls below, every sale loses money.
Target ROAS vs break-even ROAS
Your target ROAS should always be higher than break-even ROAS to generate actual profit. A common rule: target ROAS = break-even ROAS × (1 + desired profit margin). If break-even ROAS is 2.5 and you want 20% profit, target ROAS ≈ 3.0.
| Net Margin (before ads) | Break-Even ROAS | Max CPA on $50 sale | Difficulty |
|---|---|---|---|
| 50% | 2.0× | $25.00 | Very achievable — generous margin for ad spend |
| 40% | 2.5× | $20.00 | Achievable in most niches with good creative |
| 30% | 3.3× | $15.00 | Solid — typical target for scaling campaigns |
| 20% | 5.0× | $10.00 | Tight — requires strong creative and targeting |
| 15% | 6.7× | $7.50 | Very tight — marginal with paid ads at scale |
| 10% | 10.0× | $5.00 | Extremely difficult — most campaigns will lose money |
Example break-even ROAS calculation
A $49.99 product on Shopify with standard shipping and payment fees. Here's every cost and the resulting break-even targets.
Inputs
Cost Summary
Break-Even Targets
This product's low break-even ROAS (1.76×) means it can be profitable even with modest ad performance — a direct result of the 56.7% margin before ad spend.
Frequently asked questions
Common questions about ROAS, break-even thresholds, and running profitable paid ad campaigns.
Break-even ROAS is the minimum return on ad spend at which your ad campaigns stop losing money. If your break-even ROAS is 3.5×, you need to generate $3.50 in revenue for every $1.00 spent on ads just to cover all costs. Any campaign performing above that threshold is profitable; below it you're losing money on every sale. It's calculated as: Selling Price ÷ Maximum Ad Cost Per Sale.
It depends entirely on your product margin. A break-even ROAS of 2.5× or lower is generally considered achievable across most ad platforms. 2.5–4× requires solid campaign performance. Above 4× is very hard to sustain — ad platforms rarely deliver consistently at those thresholds. The key insight: the lower your non-ad margins, the higher ROAS you need, and the harder profitable scaling becomes. Run this calculator before committing ad budget to any product.
ROAS (Return on Ad Spend) is revenue generated per dollar spent on ads — a ratio. CPA (Cost Per Acquisition) is the dollar amount you pay per sale. Both describe the same relationship from different angles. ROAS = Revenue ÷ Ad Spend. CPA = Ad Spend ÷ Sales. When setting campaign targets in ad platforms: use ROAS for value-based bidding strategies, use CPA for target CPA bidding. The break-even values for both are shown in this calculator.
Include every non-ad cost per sale: product cost (COGS), shipping, platform fee, payment processing fee, and an amortised return cost. These determine how much margin is left for ad spend. The calculator deducts all of these to find your exact ad cost limit — which is then divided into the selling price to produce your break-even ROAS. Leaving any cost out makes your ROAS target look easier than it actually is.
The calculation is mathematically exact given the numbers you enter. Use your actual supplier cost, real shipping rates, and your platform's published fee schedule for the most accurate result. Note that this calculates your break-even ROAS — not a target ROAS. In practice, set your target ROAS 15–25% above break-even to leave room for ad performance variance, seasonality, and cost fluctuations. Profitable campaigns need headroom above zero.