What ROAS do I need to break even?
Break-even ROAS is the reciprocal of it, so there is nothing to divide until it is here.
What is left of an order after the cost of the goods, payment fees, shipping you absorb and returns. If you have only subtracted the cost of the goods, this number is too high and the line is too low.
Enter your gross margin as a percentage between 1 and 99. Break-even ROAS is the reciprocal of that margin, so there is nothing to divide until it is supplied.
- • Needed: gross margin, as a percentage from 1 to 99
- • Optional: your current ROAS, which places you against the line
- 10%
- 10.00x
- 15%
- 6.67x
- 20%
- 5.00x
- 25%
- 4.00x
- 30%
- 3.33x
- 35%
- 2.86x
- 40%
- 2.50x
- 45%
- 2.22x
- 50%
- 2.00x
- 55%
- 1.82x
- 60%
- 1.67x
- 70%
- 1.43x
- 80%
- 1.25x
Payment fees come out of this margin before advertising does. Work out your margin after Shopify fees, or work out your ROAS first if you do not have it to hand.
Nothing you type is sent anywhere. There is no account, no install and no store connection — the arithmetic runs where you are reading it.
This is a floor, and discounts raise it.
Every code you hand out comes off the margin this reciprocal is built on, so a blanket discount raises the floor above for everyone. Nudgesmart creates a single-use code per visitor on an expiry timer, and shows it on the way out rather than on arrival.
How it's calculated
Break-even ROAS is the return on ad spend at which a campaign pays for the goods it sold and nothing more, so a store running a 40 percent gross margin breaks even at 2.50x.
No benchmark and no published figure is used here — break-even ROAS is derived entirely from the margin you supply, which is why no source is cited for it. Getting that margin right is the hard part: the fees calculator works out what an order actually contributes after payment processing.
One reciprocal, and then the same reciprocal read backwards. The arithmetic is trivial; the margin you feed it is where every mistake on this page lives.
- Gross margin
- What is left of an order before advertising, as a percentage of the order. Cost of goods out, payment fees out, shipping you absorb out, returns allowed for. Every other figure on this page is derived from it, so an optimistic margin here produces an optimistic line and a campaign that quietly loses money.
- The reciprocal
- 1 divided by the margin, expressed as a decimal. The relationship is not linear and that is the whole lesson: going from a 50 percent margin to 25 percent does not move the bar from 2.00x to 2.50x, it moves it to 4.00x.
- Gross margin per ad dollar
- Your ROAS multiplied by your margin. It is what one advertising dollar brings back in margin rather than in revenue, and it is the figure that is either above or below the dollar you spent. Everything else on this page is a restatement of it.
- Required margin
- 1 divided by your current ROAS — the gross margin the campaign would need in order to break even where it already sits. This is the reverse reading, and it is usually the more actionable one, because margin responds to pricing and sourcing while ROAS mostly does not respond to being stared at.
- Headroom
- Your ROAS divided by the break-even ROAS. Above 1.00x the campaign is contributing; at 1.00x it is funding itself and nothing else. It answers how far performance can fall before the campaign stops paying for itself.
Nudgesmart is available on the Shopify App Store. Browse the template library or see what it costs.
The same ROAS, read against different margins
Illustrative arithmetic, not customer data. Every verdict is produced by the same function the calculator above runs.
| Scenario | Gross margin | Break-even ROAS | Their ROAS | Per ad dollar | Verdict |
|---|---|---|---|---|---|
| Apparel brand on a healthy margin | 60% | 1.67x | 2.40x | $0.44 | Above break-even |
| Supplements, high margin and low ROAS | 70% | 1.43x | 1.60x | $0.12 | Above break-even |
| Electronics reseller with a strong-looking ROAS | 20% | 5.00x | 3.50x | -$0.30 | Below break-even |
| Home goods, campaign sitting on the line | 45% | 2.22x | 2.20x | -$0.01 | Sitting on the line |
| Jewellery, margin good and ROAS short | 55% | 1.82x | 1.50x | -$0.17 | Below break-even |
| Print on demand, thin margin and high ROAS | 30% | 3.33x | 4.00x | $0.20 | Above break-even |
Row three is the reason this page exists. A 3.50x ROAS is a figure most merchants would be pleased with, and at a 20 percent gross margin it loses 30 cents on every advertising dollar. Row four is the quieter version: 2.20x against a line of 2.22x is not a thin profit, it is noise.
What this number doesn't tell you
Break-even is not profitable
A campaign on the line pays for the goods it sold. It contributes nothing to rent, salaries, software or the person running the ads. Treating break-even as the target means running a business that covers its cost of goods and nothing else.
The line assumes the attributed revenue is real
Break-even ROAS is arithmetic on whatever ROAS you feed it, and that figure comes from a platform with an attribution window and an interest in the answer. Clearing the line on a number that is over-claimed is not clearing it.
It is a first-order calculation, not a lifetime one
A store where customers reorder can rationally run below break-even on the first purchase. That is a real strategy, and it needs a repeat-rate figure this tool does not ask for — so read a below-the-line verdict as a question rather than a verdict.
Margins are not one number
Most catalogues have a wide spread, and a campaign that happens to sell the thin end is losing money while the blended margin says it is fine. Running this per product line is more work and a much better answer.
Discounts move the line while the campaign is running
A 20 percent code applied at checkout takes 20 points off the order value the margin was calculated on, which raises the break-even ROAS for exactly the orders the promotion produced. The line you calculated before the sale is not the line during it.
Questions
How do you calculate break-even ROAS?
Divide 1 by your gross margin expressed as a decimal. A 40 percent gross margin gives 1 divided by 0.4, which is 2.50x. A 25 percent margin needs 4.00x and a 70 percent margin needs 1.43x. It is a reciprocal, so the relationship is not linear: halving your margin doubles the ROAS you need.
What margin should I use?
Contribution margin before advertising, not the markup on the product page. Subtract the cost of the goods, payment processing, shipping you absorb, pick and pack, and an allowance for returns. If you only subtract the cost of the goods, the break-even ROAS this returns is too low and a campaign that looks profitable is not.
Is a 3.5x ROAS good?
It depends entirely on margin, which is why no honest answer exists in the abstract. At a 20 percent gross margin, break-even is 5.00x, so 3.5x loses 30 cents on every advertising dollar. At a 70 percent margin, break-even is 1.43x, so the same 3.5x is comfortably profitable. The same number is a good month and a bad one.
What margin would I need to break even at my current ROAS?
Divide 1 by your ROAS. At 3.5x you need a gross margin of 28.6 percent; at 2.0x you need 50 percent. This is the more useful reading of the two, because margin is the number you can actually change with pricing, sourcing and shipping policy.
Should I run campaigns at break-even?
Sometimes, deliberately. A campaign sitting on the line buys revenue at cost, which can be worth it for a product people reorder or where the first order leads to a second. It is only a mistake when it happens by accident, which is what this tool is for.
Does this tool need my store, an account or an install?
No. It runs in the page, takes one number you already have, and sends nothing about your store anywhere.
Knowing the line is not the same as clearing it.
A discount moves the line you just calculated. Nudgesmart attaches the code to the popup that earns it, so the give-away is a decision rather than a leak.
