Target CPA limited by budget: the August 2026 change

Starting on August 17, 2026, Google changed how target CPA and target ROAS bidding work when a campaign is Limited by budget, and says the rollout finished on August 27, 2026. Google’s own example: a campaign with a $10 target CPA that was getting conversions at $5 now delivers closer to a $10 cost per conversion.

So if you set a target long ago and your cost per lead has crept up since late August, this is a likely reason. Nothing broke. The system is now doing what your target told it to.

What changed

“Limited by budget” is a status Google shows when your average daily budget is lower than what your settings could spend. In plain terms, there are more searches you could show for than your budget can pay for.

Before the change, a budget-limited campaign with a target often beat that target. The budget held it back, so it bought only the cheapest conversions. Google says this was confusing, because the target you set was not what you got.

Now the campaign aims more closely at the target itself. Google says:

• It affects target CPA (your goal cost per lead or sale) and target ROAS (your goal return on ad spend) in Search, Shopping, Performance Max, Demand Gen and Travel campaigns. Display and Hotel campaigns already worked this way.
• It affects only campaigns that are Limited by budget.
• It does not affect Manual CPC or Target Impression Share.
• Google won’t change your budgets or targets for you, and your daily and monthly budget limits stay in place.

Why it matters for your money

Your target is a promise to Google about what you’re willing to pay. If your target says $50 per lead but you were happy at $35, Google may now spend closer to $50 for each lead. With the same budget, that means fewer leads.

Take a $30-a-day budget. At $35 a lead, that’s about 26 leads in a month (30.4 days × $30 ÷ $35). At $50 a lead, it’s about 18. Same spend, eight fewer leads.

For target ROAS the logic is flipped. A target ROAS that is lower than what you were getting lets Google accept less revenue per dollar.

How to check if you’re affected

1. Go to Campaigns and look at the Status column. Find campaigns that say Limited by budget.
2. For each one, check the Bid strategy column. Is it target CPA, target ROAS, or Maximize conversions or conversion value with a target set?
3. Note the target. Compare it with the campaign’s actual Cost / conv. (or conversion value / cost for ROAS).
4. Set the date range to compare the 28 days before August 17, 2026 with a recent 28 days. Did cost per conversion move toward the target?
5. Check Recommendations. Google says it shows target recommendations for campaigns that recent data suggests are likely to be affected.

(If you can’t find it, search for “campaigns” in the Google Ads search bar.)

If your campaign was already beating its target by a wide margin before August 17, it is the type most likely to see a change. Campaigns with fewer than 7 conversions don’t get a recommended target from Google, but you can still change the target yourself.

How to fix it

Start with one question: “Is my target the number I actually want?”

If the target is higher than you would really pay:

1. Go to Campaigns and click the campaign name.
2. Open Settings, then Bidding.
3. Lower the target CPA to the cost you were getting before, or to what you can afford. For target ROAS, raise the target.
4. Click Save.

(If you can’t find it, search for “bid strategy” in the Google Ads search bar.)

Expect daily spend to drop a little after you tighten the target. Google says you can model this with the bid simulator before you save.

If the target is right and you want more leads: raise the budget, if you can afford it. Google suggests keeping the daily budget comfortably above average daily spend. Check the Recommendations page for its estimates first, and raise the budget in steps rather than all at once.

If you want volume and don’t mind cost moving around: Google lists switching to Maximize conversions or Maximize conversion value without a target. Cost per conversion will then vary as your budget changes. See Maximize Clicks vs Maximize Conversions.

Make one change at a time. Google suggests waiting one to two conversion cycles before judging results. A conversion cycle is the usual time from click to lead or sale for your business.

When it’s fine

“Limited by budget” alone is not a problem. Many small businesses have more possible searches than money. If your cost per lead is still where you want it, there’s nothing to fix.

It’s also fine if cost per conversion rose a little and is still well inside your goal. The aim is not the lowest number possible. It’s a number that makes you money. And before blaming the bidding change, check that conversions are still being counted correctly. A tracking problem can look like rising costs. See Google Ads clicks but no conversions.

Check it automatically

The free SpendCanary scan looks at every budget-limited campaign that has a target and compares recent cost per conversion with the period before. SpendCanary flags budget-limited campaigns with a CPA or ROAS target whose cost per conversion in the last 28 days is at least 25% higher than in the 28 days before.