Why Your ROAS Target Is Probably Wrong

A ROAS target looks like a simple number. In practice, it is a business decision disguised as a marketing metric. The problem starts when brands choose that number by looking at an industry benchmark, a competitor, or whatever felt acceptable last quarter. A 3x return can be excellent for one business and unprofitable for another. The right target has to come from your own economics.

Start with the business, not the benchmark

Benchmarks are useful for context, but they are a poor substitute for unit economics. Two brands can sell products at the same price and still need very different returns because their gross margins, fulfilment costs, repeat purchase rates, and operating models are different. Before setting a target in an ad platform, define what the business can actually afford to pay to acquire a customer.

The simplest starting point is contribution margin. Take the revenue from an order and subtract the variable costs required to fulfil it: product cost, payment fees, shipping subsidies, and other costs that rise with each sale. What remains is the amount available to cover acquisition and fixed costs. That number tells you far more than an external ROAS benchmark.

Then decide whether you are optimizing for the first purchase or for customer lifetime value. If customers buy repeatedly, judging acquisition only on the first order can make healthy campaigns look weak. But lifetime value should not become an excuse for optimistic forecasting. Use observed retention and repeat-purchase data where possible, and keep the assumptions visible.

Turn the economics into a target

Suppose a product sells for €100 and leaves €40 in contribution margin before marketing. If the business needs €15 of that contribution to cover overhead and profit, the maximum sustainable acquisition cost is €25. That implies a break-even revenue-to-ad-spend relationship of 4x on the first order: €100 in revenue for €25 in acquisition cost.

Now change the economics. If a meaningful share of customers returns and the expected contribution from repeat purchases raises the customer value to €150, the business may be able to acquire that customer at a higher cost while still creating value. The target can move — but because the economics moved, not because an industry article said that a lower ROAS is normal.

This is also why a single blended target is not always enough. New-customer acquisition, branded search, retargeting, and retention campaigns play different roles. A campaign that captures existing demand should not automatically receive the same target as one that creates new demand.

Translate the target into the ad account

Once the business target is clear, translate it into platform-level guardrails. Define the acceptable CPA or ROAS by campaign type, separate new-customer performance where the data allows it, and make sure reporting connects spend to the outcome the business actually cares about. Platform-reported return is useful, but it should not be the only source of truth.

Most importantly, treat the target as a model rather than a permanent rule. Margins change. Conversion rates change. Customer mix changes. Retention changes. Your acquisition target should be reviewed when the underlying economics change, not adjusted simply because performance had a good or bad week.

A useful ROAS target is not the highest number you can force out of an ad account. It is the number that lets marketing acquire demand at a level the business can sustain — and scale. Start there, then optimize.