Channel Prioritization and Budget Allocation in Google Ads: How to Control Where Your Budget Goes

Have you ever had a Search campaign where the Display Network or search partners quietly ate a chunk of your budget and brought back almost nothing? Until now you had two options: leave them on and hope, or turn them off completely and lose the little good traffic they did bring.

As of October 14, 2026, Google Ads gives you a third option, and it is the one advertisers have been asking for for years. Two new settings, channel prioritization and budget allocation, let you decide which channel gets funded first and what percentage of your daily budget can reach secondary channels at most. They apply to Search, Shopping, Performance Max, and Demand Gen, and they are rolling out to accounts progressively starting October 15.

Here is how they work, where to find them, what their limits are, and the important change coming to Search campaigns in February 2027.

What is channel prioritization in Google Ads?

Channel prioritization lets you mark each channel in a campaign as High priority or Low priority. Google spends your budget on High priority channels first, within your target if you use Target CPA or Target ROAS, and sends whatever is left to Low priority channels.

By default, every channel is set to High priority. So if you change nothing, nothing changes.

The channels you can prioritize depend on the campaign type:

• Search: Google Search, search partners, Google Display Network.
• Shopping: Google Search and search partners.
• Performance Max: Google channels, search partners, Google Display Network.
• Demand Gen: Google channels and Google Display Network.

In Performance Max and Demand Gen, Google surfaces (Search, YouTube, Maps, Gmail, Discover) are grouped together as "Google channels." You cannot put YouTube on Low priority and Search on High priority inside a PMax campaign. If you want control at the level of each surface, Google points you to Search and Demand Gen campaigns, which allow individual opt-outs.

What is budget allocation and how is it calculated?

Budget allocation is the second setting and only works on channels marked Low priority. You set a percentage of the daily budget, and Google aims to keep spend on that channel at or below it.

The details matter here:

• The percentage is calculated from the campaign's average daily budget, not from actual spend. A 5% allocation on a $1,000 daily budget means Google aims for at most $50 a day on that channel.
• It is best effort, not a guarantee. Google says explicitly that daily spend on a channel may occasionally exceed the allocation, including on days when the campaign spends more than its average daily budget.
• It resets daily. Unspent or overspent amounts do not carry over.
• 0% means zero spend on that channel. Effectively an opt-out.
• On shared budgets, the allocation applies to the shared budget as a whole, across every campaign using it.

If you set an account default allocation, it applies to every eligible campaign of that type, except where you set a campaign-level or shared-budget-level override.

When does prioritization actually change anything?

This is the part most people miss. Channel prioritization only has an effect when the campaign is limited by budget.

If you run Target CPA or Target ROAS and the campaign is not budget-limited, Google tries to hit your target across all channels anyway, so priority levels generally do not change the distribution. Budget allocations on Low priority channels still apply, though. That is why Google says budget allocation is particularly useful on campaigns that are not budget-limited.

In short, from Google's own table:

• Target CPA / ROAS / CPC, limited by budget: High priority channels spend first, within target. If additional spend there would exceed the target, budget shifts to Low priority channels when they can deliver conversions at target.
• Maximize Conversions / Conversion Value / Clicks, Manual CPC, Target Impression Share: High priority channels spend first. Whatever cannot be spent there, because of settings or eligible traffic, goes to Low priority channels.

How do you set channel priorities, step by step?

At the account level (applies to every campaign of that type):

1. Go to Account settings.
2. Find the Channel Prioritization card.
3. Pick the campaign type: Search, Shopping, Demand Gen, or Performance Max.
4. Set each channel to High priority or Low priority. Optionally, enter a budget allocation percentage for Low priority channels.
5. Save.

At the campaign level (overrides the account default):

1. Campaigns page, select the campaign, Settings.
2. Expand the Channel Prioritization card.
3. Select Use campaign-level settings. If the campaign uses a shared budget, the settings apply to every campaign sharing it.
4. Set priorities and, optionally, percentages.
5. Save.

Two practical limits: you cannot set priorities from a manager account (MCC), only inside each client account, and support for the Google Ads API and Google Ads Editor is coming later. For now you work from the interface or Search Ads 360.

What changes for Search campaigns in February 2027?

This is the news with a deadline. Starting in February 2027, every Search campaign with Display Expansion enabled automatically migrates to channel prioritization and budget allocation. The current spend allocation setup goes away, and you may see spend shift between Google Search, search partners, and the Display Network.

If you want to keep your current behavior, Google tells you exactly what to do: set the Google Display Network to Low priority with a 50% daily budget allocation.

And one change that hits some accounts directly: after the migration, the Display Network will no longer serve on Search campaigns using the Target Impression Share bid strategy.

If you set channel priorities on Search campaigns before February 2027, the new settings apply right away and replace the current Display Expansion behavior. You do not have to wait.

What other limitations should you know?

• Campaign total budgets support channel prioritization in Demand Gen only. For every other campaign type, prioritization settings do not apply to campaigns using total budgets.
• Demand Gen gets prioritization only, with no budget allocation. Google's blog post does not mention this exception, but the help page states it clearly.
• Shared budgets must be between campaigns of the same type (all Search or all Shopping) for the settings to apply. The shared budget is treated as a single pool across all linked campaigns.
• In experiments, you can use the new controls in custom experiments, but multi-campaign shared budgets are not supported and every channel is treated on the same priority tier.

How do you use this in a real account?

A few scenarios that make sense for most accounts:

Search with search partners and Display turned on. Google Search on High priority. Search partners on Low priority at 10% to 20%. Display Network on Low priority at 5% to 10%, or 0% if history shows it never delivered. You keep the little good traffic from secondary channels without letting them eat the budget.

Performance Max where partners and Display dilute results. Google channels on High priority. Search partners and Display on Low priority at a small percentage. This is the first time you can do that in PMax without leaning on placement exclusions.

You excluded search partners or Display long ago out of fear. Now you can bring them back under control: Low priority at 5%, watch for two weeks, see what they deliver. Google says directly that these controls are also meant for advertisers who want to opt back in with more confidence.

Small budget, budget-limited campaign. This is where prioritization has the biggest effect, because every dollar has to go where it converts. Put your main channel on High priority and leave the rest on Low priority with small percentages.

Before any of it, look at the Network segment in your reports over the last 60 to 90 days. Make the decision from your own account data, not from general rules. And if you want to understand why controls like this are landing now in platforms that spent years pushing toward full automation, we wrote about what to automate first and what to keep under manual control. The answer is the same: automation does the work, but you decide where the money goes.