Good result
A good ad result gives you a clear spend threshold: actual ROAS should beat break-even, and ACOS should stay below the profit-safe limit.
Ads Calculators
Break-Even ROAS Calculator
Find the exact ROAS a campaign needs to break even after price, COGS, shipping, and fees, plus the higher target ROAS required to keep a profit buffer.
5 editable inputs3 decision outputsShareable result link
Use this calculator to
- Break-even ROAS
- Target ROAS (keeps buffer)
- Max ad spend per sale
Change the inputs and the result updates instantly.
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Decision snapshot
Use this break even roas calculator before you quote, publish, discount, or increase spend.
The calculator turns the messy parts of the decision into a visible estimate: what goes in, what comes out, and which assumptions need a second look before you act.
Primary term: break even roas calculatorVerified 2026-07-01
Best for
Find the exact ROAS a campaign needs to break even after price, COGS, shipping, and fees, plus the higher target ROAS required to keep a profit buffer.
Inputs used
Selling price, Product cost (COGS), Shipping and fulfillment, Platform or payment fees, Desired profit buffer.
Outputs to check
Break-even ROAS, Target ROAS (keeps buffer), Max ad spend per sale.
Formula
Break-even ROAS formula
ROAS is revenue divided by ad spend. Break-even ROAS spends the entire pre-ad margin on ads and leaves zero profit; target ROAS is higher because it also protects your profit buffer.
Calculation path
margin before ads = price - COGS - shipping - fees
break-even ROAS = price / margin before ads
target ROAS = price / (margin before ads - profit buffer)How to use this calculator
- 01Enter the unit economics for one product.
- 02Add platform or payment fees as a percentage of the selling price.
- 03Set a profit buffer if you want the target ROAS to leave margin after ads.
- 04Beat the break-even ROAS to avoid a loss, and beat the target ROAS to hit your buffer.
Worked example
$45 product with a 10% buffer
A $45 product has $14 COGS, $5 shipping, 8% fees, and a 10% profit buffer.
| Margin before ads | $22.40 |
| Break-even ROAS (buffer excluded) | 2.01x |
| Profit buffer | $4.50 |
| Max ad spend per sale | $17.90 |
| Target ROAS (keeps buffer) | 2.51x |
What the result means
Below the break-even ROAS a campaign loses money; between break-even and target ROAS it profits but eats into your buffer. If the break-even number is unrealistically high, fix price, costs, or fees before increasing ad spend.
Decision guidance
How to read the result
The break even roas calculator is most useful when the output is tied to a next action. Use it to decide whether the price, fee load, margin, or ad target is strong enough before you publish, promote, or scale the offer.
Check before acting
Do not optimize campaigns against revenue alone. Paid traffic can look efficient while silently consuming the unit margin.
Next decision
Use the threshold to set campaign targets, pause unprofitable ad sets, or improve price, conversion rate, COGS, and shipping before adding spend.
Before you use the number
Confirm Selling price, Product cost (COGS), Shipping and fulfillment, and Platform or payment fees match the exact sale, product, listing, or campaign you are evaluating.
Use Break-even ROAS, Target ROAS (keeps buffer), and Max ad spend per sale as a decision threshold, not just a one-off math answer.
Compare the result with your real profit target, cash-flow needs, and customer willingness to pay.
Re-run the calculator when fees, shipping costs, ad costs, materials, labor rates, or marketplace rules change.
Open the related ads calculators if the next decision involves another fee, platform, price, or ad-spend step.
Ad math improves when the product margin, platform fees, shipping, refunds, and target profit buffer reflect the actual offer being advertised.
Use this calculator when
Use this page when your main question is break even roas calculator. It is part of the ads calculators workflow, so the best next step is often one of the nearby tools below.
Methodology
How this calculator is built
The Break-Even ROAS Calculator is designed as a decision-support calculator, not a generic arithmetic shortcut. It keeps the formula, assumptions, example, source notes, and next-step guidance visible so the number can be checked before it affects a price, listing, or campaign.
Formula-led
This page calculates Break-even ROAS, Target ROAS (keeps buffer), and Max ad spend per sale from Selling price, Product cost (COGS), Shipping and fulfillment, Platform or payment fees, and Desired profit buffer. The formula is shown before the example so you can audit the math instead of trusting a black box.
Decision-first
The result is framed as a planning threshold for break even roas calculator, with assumptions, common mistakes, and related next-step calculators on the same page.
Review-triggered
Source-sensitive rates are listed below and should be rechecked after platform fee, payment, shipping, tax, or ad-policy changes.
Use the output as an estimate. Marketplace fees, processor rules, taxes, discounts, refunds, currency conversion, and fulfillment costs can change the final result. See the full calculator methodology for the review process and known limits.
Assumptions
- Revenue is measured as selling price per sale.
- Fees are modeled as a percentage of selling price.
- The calculator does not include returns, discounts, taxes, subscription costs, or lifetime value.
Common mistakes
Comparing actual ROAS to a generic benchmark instead of your own margins.
Leaving shipping and payment fees out of the ROAS threshold.
Spending the entire margin on ads when you still need a profit buffer.
FAQ
Frequently asked questions
Short answers for the edge cases people usually check before they trust the calculator result.
What is break-even ROAS?
Break-even ROAS is the return on ad spend where revenue exactly covers product cost, shipping, and fees, leaving zero profit. Below it, every sale from ads loses money. The headline number here is the true break-even and excludes any profit buffer.
What is the difference between break-even and target ROAS?
Break-even ROAS leaves zero profit after ads. Target ROAS is higher because it also protects the profit buffer you set, so hitting it means the campaign is profitable, not just at break-even.
What if there is no ad headroom?
If max ad spend is zero or negative, the product cannot support paid acquisition with those inputs. Raise price, lower costs, or reduce the buffer first.
Sources
References used for this calculator
These links help check the rates or rules behind the estimate. For the full review process, see the methodology.
Google Ads Help: About Target ROAS bidding
Google's documentation on setting return-on-ad-spend targets for Search and Shopping campaigns.
Amazon Ads: Advertising cost of sales (ACOS)
Amazon Ads guidance on ACOS, ROAS, and measuring sponsored-ad profitability.