How to set up Target ROAS bidding in Google Ads

How do you set up Target ROAS bidding in Google Ads?

To set up Target ROAS, first make sure every purchase conversion passes the real order value, confirm the campaign has enough conversion history and set the starting target close to the ROAS it actually achieved over the last 30 days. Then change the target in small steps, waiting 1-2 conversion cycles after each change so the bidder can adapt.

This article focuses on how to implement and manage the strategy inside Google Ads, not on what your ROAS number should be. To work out which ROAS actually keeps you profitable, read our break-even ROAS guide.

What exactly is Target ROAS?

Google defines Target ROAS as the average conversion value (for example, revenue) you would like to get for each unit you spend on ads. Its help page gives this example: 5 in sales / 1 in ad spend x 100% = 500% target ROAS.

Target ROAS is a Smart Bidding strategy. According to Google, Smart Bidding optimises for conversions or conversion value in every auction, using signals such as device, location, day and time, remarketing list membership, browser, operating system, language and the actual search query. Instead of setting bids per keyword, you define an efficiency target and the system sets the bids.

If you need a refresher on the metric itself, our guide to what ROAS is and how to calculate it covers the basics.

What do you need before switching to Target ROAS?

Target ROAS only works with good value data. Check the following first:

1. Transaction-specific values: each purchase conversion should send the actual order amount, not a fixed value.
2. One primary purchase conversion: no duplicate tags or imports counting the same order twice.
3. Enough conversion history: Google's help page requires at least 15 conversions in the past 30 days for Search and Shopping, and at least 50 conversions in the past 35 days for Demand Gen.
4. Settled values: before moving to value-based bidding, Google recommends waiting 1-2 conversion cycles so the campaign receives conversion values at a similar rate.

These thresholds are minimums. The more conversions you feed the system, the better it separates valuable traffic from the rest.

How do you choose the starting target?

The most common mistake is starting with the profitability target you wish you had. If a campaign achieved 350% ROAS over the last 30 days and you set the target to 600% overnight, the bidder will only enter auctions it is very confident about and volume will drop. Google itself warns that a target that is too high may limit the traffic your ads get.

A healthier approach:

• Find the actual ROAS of the last 30 days (exclude the most recent days if you have conversion lag).
• Set the starting target at or slightly below that value.
• If your profit goal is higher, move toward it gradually.

Example step-up plan

Example: a campaign running at 380% ROAS over the last 30 days, with a break-even ROAS of 300% and a goal of 450%.

Step	Target ROAS	Wait	What to check
1	370%	1-2 conversion cycles	Is volume holding?
2	400%	1-2 conversion cycles	Spend and order count
3	430%	1-2 conversion cycles	Is actual ROAS close to target?
4	450%	1-2 conversion cycles	Did total contribution profit grow?

The numbers are illustrative. The logic is what matters: at each step, measure how much volume you give up and check whether total profit actually improves.

Should you raise or lower the target?

Target ROAS and volume move in opposite directions. Raise the target and the system becomes more selective, so spend and orders usually fall. Lower it and, in Google's words, the system can enter more auctions and generate more volume.

So the decision rests on one question: do more orders or more efficiency per order leave you with more profit? A campaign bringing 100,000 in revenue at 500% ROAS can leave less total contribution than one bringing 200,000 at 400%. Total contribution profit, not the ratio, should drive the decision.

Maximize conversion value or Target ROAS?

Google Ads offers two value-based options:

Option	Behaviour	When it fits
Maximize conversion value (no target)	Tries to spend the full average daily budget	Fixed budget, volume matters more than efficiency
Maximize conversion value + target ROAS	Behaves like a Target ROAS strategy	You have a clear efficiency goal

Google's help page explains that without a target ROAS, Maximize conversion value tries to fully spend your average daily budget, and that with a target set it behaves like Target ROAS. If a campaign is currently underspending its budget, switching it to Maximize conversion value without a target can increase spend substantially.

Standard or portfolio strategy?

You can use Target ROAS as a standard strategy on one campaign or as a portfolio strategy that manages several campaigns against a shared target. Portfolios help pool data across campaigns that each have low conversion volume. According to Google, portfolio strategies are not available for Performance Max, Hotel or Travel campaigns.

What should you check when Target ROAS underperforms?

1. Conversion tracking: are values correct, are orders double counted, is the currency right?
2. Is the target too high? A sharp drop in impressions and spend usually means the target is unrealistic.
3. Too many changes: if the target changes every two or three days, the system never settles.
4. Conversion lag: if some sales arrive days after the click, recent ROAS will look lower than it really is. Account for lag before reacting.
5. Product mix: if one campaign mixes products with very different margins, a single target is too aggressive for some and too loose for others.

If you would like your Target ROAS settings and campaign structure reviewed together, see how Performetic manages Google Ads on our services page or ask for a free growth analysis.

Key takeaways

• Target ROAS is the average conversion value you want for each unit of ad spend.
• Search and Shopping need at least 15 conversions in 30 days; Demand Gen needs at least 50 in 35 days.
• Start near your actual ROAS and step toward your profit goal gradually.
• Wait 1-2 conversion cycles after every change.
• Higher targets mean lower volume; decide on total contribution profit.
• Maximize conversion value without a target tries to spend the full budget.