Break-even cost per lead calculator for Meta Ads
Enter what a customer is worth and how many leads become customers. See the most you can pay per lead, then a safer target below it.
A lead is only worth what it is likely to become. Multiply the margin from a customer by the share of leads that turn into customers, and you have the value of one lead. The most you can pay for it and still break even is that value. This calculator does the sum, then sets a target below it, so a run of weaker leads does not turn the account loss-making. If you sell products online, use the break-even ROAS version.
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How it works
- Online sales: break-even cost per sale = average order value x gross margin. Break-even ROAS = 1 / gross margin.
- Leads: break-even cost per lead = margin per customer x share of leads that become customers.
- Suggested targets apply your safety buffer: target cost = break-even x (1 - buffer), target ROAS = break-even ROAS x (1 + buffer).
How to use the result
These are the first-purchase economics only. If customers buy again, lifetime value can justify a higher cost, but agree that with the client in writing. Record the target and the date it was agreed.
Common questions
How do I work out what a lead is worth?
Multiply the margin you make on a customer by the share of leads that become customers. Illustration with made-up numbers: a customer margin of 10,000 and one lead in ten becoming a customer makes a lead worth about 1,000.
How accurate is the lead to customer rate?
Only as accurate as your records. Use a recent period from the client's own data, and update it when the sales process changes.
Which margin should I use?
Gross margin on the product, before ad spend. Ask the client for it, and be clear whether shipping and payment fees are included.
What if a customer buys more than once?
Then lifetime value is higher than the first order. Use it only if the client agrees and the data supports it.
Is a buffer really needed?
Yes. Your inputs are estimates, and a target exactly at break-even leaves no room for profit or error.
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