Target ROAS in Google Ads: how to set it from your break-even

How target ROAS bidding works in Google Ads

Target ROAS is one of Google's Smart Bidding strategies. For every auction, Google Ads predicts how likely a click is to convert and how much that conversion will be worth. It then sets the bid so that your campaign's average ROAS lands on your target. Some conversions come in above the target and some below. Google steers the average.

Your reports show the same ratio as a decimal in the Conv. value / cost column. A 4.44 there equals 444% in the bid strategy. Keep the two formats apart when you copy a value into the bid strategy.

Google needs enough conversion history before target ROAS works well. The minimums from the Google Ads Help Center:

Your conversion values have to be real order values. If your tracking sends a fixed value or none at all, target ROAS has nothing to optimize. After you switch or change the strategy, Google advises waiting 1 to 2 conversion cycles before you judge the result.

Derive your target ROAS from break-even and profit

Google recommends a starting target based on your actual ROAS over the last few weeks. That number describes what the campaign did. It does not tell you whether that made money. Start from your store's numbers instead.

Break-even comes first. It is the ROAS at which ad spend eats your entire contribution margin. Your ad account keeps refunded orders in the conversion value, so break-even in the account sits higher than on paper:

For the target, subtract the profit you want from your contribution margin and run the same formula with what is left:

Table assumptions: 25% returns, no sales tax in the conversion value. Most US stores send order values without tax. If you sell in the UK or EU and track prices with VAT, multiply by 1 + VAT rate. For your own margin and return rate, run the breakeven ROAS calculator. It returns the target in the percentage format Google Ads expects.

If you enter your break-even after returns (3.33 at 30% margin) while the account counts orders before refunds, Google hits the target and you still lose money on every order.

Google's recommended target vs. the target your margin needs

Put Google's recommendation next to the target from your formula. The gap tells you what to do next:

The third row is common. In our ecommerce ROAS benchmark of 38 accounts, the median Shopping and Performance Max ROAS was 2.30. For the store in the table above, that sits far below its 4.44 break-even. A higher target alone will not close a gap that size. It will mostly cut volume.

What happens when your target ROAS is too high

A high target makes Google bid only where it predicts a high return. Google's own help puts it plainly: a target that is too high may limit the traffic your ads get. You see it in three places:

• Volume drops. Impressions, clicks and conversions fall because Google skips auctions it cannot win at your return.
• Budget stays unspent. Google confirms that a more efficient target will likely affect your daily spend. For example, a campaign with a $500 daily budget might spend $200.
• ROAS rises while revenue shrinks. The ratio looks better, but the absolute contribution margin can fall.

Since August 17, 2026, one more effect applies. Google changed how target-based strategies behave in campaigns that are limited by budget. They now optimize more consistently toward the stated target, in Search, Shopping, Performance Max, Demand Gen, Display, Hotel and Travel campaigns. A campaign that used to beat its target while capped by budget now spends toward the target instead. Google's example: a $10 target CPA that delivered $5 will now land closer to $10.

For target ROAS, that means a budget-limited campaign with a 400% target that ran at 600% can now drift toward 400%. Google lists five responses: keep the target, lower it with the Bid Target Adjustment Tool (available since July 6, 2026), set a custom target, switch to Maximize conversion value, or raise the budget. The first question is always the same: is the stated target the return you actually need?

You can catch these patterns before they cost a month. Our free Smart Bidding monitor runs inside your Google Ads account and lists campaigns stuck in learning, far from their target ROAS or capped by budget. It only reads data and writes the result to a Google Sheet.

Adjust your target ROAS in steps

Google does not publish a step size. DashThis recommends raising target ROAS in 10% to 20% increments once performance is stable. We work the same way and add two rules: change one thing at a time, and wait 1 to 2 conversion cycles before the next step.

1. 01

   Set the required target

   Calculate it from margin, returns, tax and profit. That is where you want to end up.

2. 02

   Start near actual performance

   If the campaign runs at 500% and you need 667%, start at 500% or slightly above.

3. 03

   Raise by 10 to 20% per step

   500% to 575%, then 575% to 660%, then 667%. Each step is 15% or less.

4. 04

   Check volume and spend

   After each step, compare conversions, conversion value and spend with the weeks before. If volume collapses, go back one step.

5. 05

   Fix what bidding cannot

   If the campaign never reaches the target, remove products and queries that never pay off instead of pushing the target further.

Lowering a target works the same way. A big cut opens the floodgates to expensive clicks, so step down too.

Check these before you touch the target

Target ROAS optimizes toward the data you give it. When the data is off, the target is the wrong lever:

1. Primary conversions. Only purchases should count as primary. Add to cart or page views as primary goals inflate ROAS and mislead bidding.
2. Brand and non-brand. Brand searches convert cheaply. One target for both lets brand hide losses in prospecting. Split them and give each its own target.
3. Margins by product. Products with 20% and 50% margin need different targets. Group them into separate campaigns or asset groups.
4. Merchant Center status. Disapproved products or a suspended account cut Shopping and Performance Max volume regardless of the target. If Google flagged your store for Google Merchant Center misrepresentation, fix that first.

These checks are the groundwork any Google Ads agency should run before it touches bidding. Whether the target works shows up in your store backend: revenue after refunds, minus variable costs, minus ad spend. That is also where we measure our guarantee.