Microsoft Advertising just gave every paid search team a homework assignment with a hard due date. On October 1, 2026, the Microsoft Ads Max CPC field will no longer be available when you build new non-portfolio campaigns using Target CPA, Target ROAS, Maximize Conversions, Maximize Conversion Value, or Maximize Clicks. Existing campaigns already using Max CPC by October 1 can keep the setting. Portfolio bid strategies keep it. Target Impression Share retains its cap; Enhanced CPC remains available with automatic bid adjustments. But if you launch a fresh standalone campaign on October 1 or later, that CPC ceiling you have been using as a safety net is simply gone from the setup screen.
Use the time before October 1 to learn how your accounts behave without that guardrail. The test sequence below is a planning suggestion, not a Microsoft requirement or a claim that 40 days remain. Campaigns already using Max CPC do not need to remove it just because of this change.
What The Microsoft Ads Max CPC Change Actually Does
Here is the plain version of the Microsoft Ads Max CPC change. When you spin up a new standalone campaign on Microsoft Advertising using one of the affected automated bidding strategies, you used to be able to check a box that said “I want to set a maximum CPC.” That box capped how much the algorithm could bid on any single click, even if the auction wanted to pay more. It gave nervous account managers a way to sleep at night. If you have used the Microsoft Import Center to move campaigns over from Google Ads, that Max CPC box is the guardrail you kept reflexively checking.
Starting October 1, that box disappears for new non-portfolio campaigns using Target CPA, Target ROAS, Maximize Conversions, Maximize Conversion Value, and Maximize Clicks, according to Search Engine Journal’s reporting on Microsoft’s advertiser notification. Existing campaigns already using Max CPC by October 1 can keep it. There is a separate tooling deadline: Search Engine Land’s September update reports January 12 for API users, tool providers and Google Import. After that deadline, Max CPC will not be supported for new campaigns or existing campaigns not already using it. The report does not specify a year for January 12.
Portfolio bid strategies and Target Impression Share retain Max CPC controls. Enhanced CPC remains another bidding option where eligible, but its manual starting bid is not a dependable ceiling: the system can adjust bids above it. Do not treat these choices as equivalent safeguards.
Why Microsoft Is Removing Max CPC From New Campaigns
Microsoft’s own stated reason is that a Max CPC limit can interfere with automated bidding by overriding your performance goals and creating spend-pacing irregularities, according to Search Engine Land’s reporting on the notification. When you cap CPC on a Maximize Conversions campaign, the system cannot bid up on the users most likely to convert, so it either underspends or misses your best auctions. Microsoft Ads Liaison Navah Hopkins has pointed advertisers to optimization experiments as the way to measure what a bidding change does before it runs at full budget, according to PPC Land’s report of her LinkedIn post.
You can read Microsoft’s own bidding docs to see how the platform frames it. In the Microsoft Advertising bid strategy help center, the company describes Max CPC as an optional control that overrides the algorithm. Optional is the key word. Microsoft is not saying CPC caps are bad. It is removing this optional control from the affected campaign setup paths.
The Test Plan For Your Existing Microsoft Ads Max CPC Accounts
Start reviewing campaign settings before October 1, but do not force an experiment to finish by that date. If the evidence is not ready, keep the existing cap while you evaluate the options. Here is a suggested sequence for planning the test. If you already manage paid media as one budget across channels, this sequence slots right into your normal quarterly audit.
Step 1. Inventory. Pull a report of every active Microsoft campaign that uses Max CPC today. Note the bid strategy, the current Max CPC value, the last 30-day spend, the last 30-day conversions, and the last 30-day average CPC. You need a baseline. Save it as a snapshot.
Step 2. Pick your test cohort. Choose three to five campaigns that carry Max CPC and are not your top revenue drivers. You want campaigns that matter enough to see real data, but not so critical that a bad week ruins the quarter. Ideally pick a mix of goal types. One Maximize Conversions. One Maximize Conversion Value. One Maximize Clicks if you use it.
Step 3. Run the experiment. Use Microsoft’s built-in optimization experiments to test each cohort campaign against a variant with Max CPC removed. Allow for learning and enough conversion evidence before judging results. Microsoft advises against evaluating Maximize Conversions and Target CPA during their initial learning period, and recommends allowing at least 30 conversions before evaluation. A fixed 14-day window is not proof that a test has finished. Track CPA, ROAS, click volume, average CPC, and impression share. Keep other settings stable during the test. If you need starter prompts to diagnose what the data is telling you, our PPC system prompts library has seven diagnostic prompts built for exactly this kind of read.
Step 4. Decide when the evidence is ready. Look at the delta. Possible outcomes include the following. Average CPC may rise while conversion volume keeps CPA stable. CPC may stay similar, or both CPC and CPA may worsen. Treat those patterns as questions to investigate alongside budget limits, tracking quality and conversion volume. A worse CPA alone does not establish that a portfolio strategy will fix the account. Document which outcome each campaign shows. Before removing Max CPC from an existing campaign, check the date: Search Engine Land reports that removing it after October 1 is irreversible. You will not be able to add it back to that campaign later. Keeping an existing cap and choosing a portfolio strategy for a new campaign are separate decisions.
How To Choose Between Portfolio Strategy And Trusting The Algorithm
After the tests, you have a decision to make for every new campaign you launch after October 1. Do you build it standalone and let Microsoft’s automated bidding run without a ceiling? Or do you attach it to a portfolio bid strategy so you can keep Max CPC?
Bidding choice
Keeps a CPC ceiling after October 1?
Best when
Standalone automated bidding
No ceiling
CPCs are stable, the budget can absorb a bad auction day, and conversion tracking is solid.
Portfolio bid strategy
Keeps Max CPC
CPCs swing widely, the daily budget is tight, or the campaign has no history.
Enhanced CPC
Manual bid the system adjusts
You want a manual starting point on eligible Audience, Search, or Shopping campaigns.
Target Impression Share
Caps max CPC inside the strategy
A share-of-voice goal is driving the campaign.
The honest answer depends on three things. Your average CPC volatility. Your budget pacing risk. Your comfort with the algorithm.
Go standalone with no CPC ceiling when average CPCs in your niche are stable, budgets are healthy enough to absorb a bad auction day, and you have solid conversion tracking so the algorithm has good signal. Microsoft recommends allowing at least 30 conversions before evaluating Maximize Conversions, Target CPA or Target ROAS performance in its bid strategy documentation. That is evaluation guidance, not proof that a CPC ceiling is unnecessary. If you run home services or roofing, be more cautious. Our breakdown of the real cost of a roofing PPC lead shows how quickly one bad auction can wreck an account with tight lead economics.
Use a portfolio strategy with Max CPC when CPCs swing wildly, you are on a tight daily budget that could get eaten by one expensive click, or you are running a brand-new campaign with no historical data. The portfolio wrapper adds complexity but keeps the guardrail. If you are already using portfolios for other reasons, this is a no-brainer.
Consider Enhanced CPC or Target Impression Share when neither extreme fits. Enhanced CPC gives you a manual bid starting point with automated adjustments. Target Impression Share lets you name a share of voice goal and cap CPC inside that strategy. These strategies serve different goals; neither is automatically safer. Enhanced CPC can bid above its manual starting point. The same logic we used in choosing what to keep on and turn off in Meta Advantage+ applies here. Automation is a spectrum, not a switch.
What The Microsoft Ads Max CPC Change Means If You Manage Multiple Accounts
If you manage Microsoft accounts for clients, or run several of your own in-house, this update is going to show up in three conversations over the next quarter.
The first conversation is the stakeholder who reads about the change on LinkedIn and asks whether their campaigns are safe. Existing campaigns already using Max CPC by October 1 can retain it, but removing it after October 1 is irreversible. Save yourself repeated explanations by writing a short note now, before the questions start. Two paragraphs. What is changing. What you are doing about it.
The second conversation is the one about test results. Once learning and conversion evidence support a conclusion, review the results for each account. Some will need portfolio strategies going forward. Some will run fine without CPC ceilings. Put the recommendation in writing. If evidence is insufficient by October 1, retain the existing cap rather than remove it to meet an arbitrary testing deadline. This is the same kind of update you should be sending when platform reports change, like when your AI search terms report stopped showing what you thought it was showing.
The third conversation is the workflow one. If your team builds Microsoft campaigns through the UI, retrain everyone on the new setup path. If you use Microsoft Advertising Editor, expect the Max CPC field to disappear there too, though Microsoft has not announced timing. For API users, tool providers and Google Import, the September update gives a January 12 deadline for new campaigns and existing campaigns not already using Max CPC. It does not specify a year for that date. Confirm your provider’s implementation before changing build templates. Anyone still leaning on Editor scripts to standardize campaign builds should audit those templates now.
Frequently Asked Questions
Which Microsoft Ads bid strategies lose Max CPC on October 1, 2026?
New non-portfolio campaigns using Target CPA, Target ROAS, Maximize Conversions, Maximize Conversion Value, or Maximize Clicks lose the Max CPC field, according to Microsoft’s advertiser notification. Existing campaigns already using Max CPC by October 1 and portfolio bid strategies can keep it. Removing it from an existing campaign after October 1 is irreversible.
Do existing Microsoft campaigns lose their Max CPC setting?
Existing campaigns already using Max CPC by October 1 can keep it. Removing it after October 1 is irreversible. For API users, tool providers and Google Import, the reported January 12 deadline also covers existing campaigns not already using Max CPC. The report does not specify a year for January 12.
How can you still cap CPC on Microsoft Ads after October 1?
Attach the new campaign to a portfolio bid strategy or use Target Impression Share, which supports a max CPC control. Enhanced CPC is a separate option with automatic bid adjustments, not a dependable CPC ceiling.
What should you do before October 1?
Inventory the campaigns using Max CPC and plan a small optimization experiment. Allow for learning and enough conversion evidence; a fixed 14-day window does not establish a result. Keep an existing cap if you cannot yet support removing it, and remember that removal after October 1 is irreversible.
Ship The Test Plan, Not A Reaction
The teams that lose money on this change will be the ones who ignore it until October 2 and then discover their new campaign build broke. The teams that gain confidence will be the ones who use the time before October 1 to learn how their accounts actually behave without a CPC ceiling, then make deliberate choices about which campaigns need portfolio wrappers and which do not.
The Microsoft Ads Max CPC field was not magic. It was a safety net worth auditing. The removal is Microsoft’s way of forcing the audit. Do the tests. Save the results. Update your build playbooks. Then move on.
Microsoft Ads Max CPC Removal: October 1 Changes and Test Plan
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Microsoft Advertising just gave every paid search team a homework assignment with a hard due date. On October 1, 2026, the Microsoft Ads Max CPC field will no longer be available when you build new non-portfolio campaigns using Target CPA, Target ROAS, Maximize Conversions, Maximize Conversion Value, or Maximize Clicks. Existing campaigns already using Max CPC by October 1 can keep the setting. Portfolio bid strategies keep it. Target Impression Share retains its cap; Enhanced CPC remains available with automatic bid adjustments. But if you launch a fresh standalone campaign on October 1 or later, that CPC ceiling you have been using as a safety net is simply gone from the setup screen.
Use the time before October 1 to learn how your accounts behave without that guardrail. The test sequence below is a planning suggestion, not a Microsoft requirement or a claim that 40 days remain. Campaigns already using Max CPC do not need to remove it just because of this change.
What The Microsoft Ads Max CPC Change Actually Does
Here is the plain version of the Microsoft Ads Max CPC change. When you spin up a new standalone campaign on Microsoft Advertising using one of the affected automated bidding strategies, you used to be able to check a box that said “I want to set a maximum CPC.” That box capped how much the algorithm could bid on any single click, even if the auction wanted to pay more. It gave nervous account managers a way to sleep at night. If you have used the Microsoft Import Center to move campaigns over from Google Ads, that Max CPC box is the guardrail you kept reflexively checking.
Starting October 1, that box disappears for new non-portfolio campaigns using Target CPA, Target ROAS, Maximize Conversions, Maximize Conversion Value, and Maximize Clicks, according to Search Engine Journal’s reporting on Microsoft’s advertiser notification. Existing campaigns already using Max CPC by October 1 can keep it. There is a separate tooling deadline: Search Engine Land’s September update reports January 12 for API users, tool providers and Google Import. After that deadline, Max CPC will not be supported for new campaigns or existing campaigns not already using it. The report does not specify a year for January 12.
Portfolio bid strategies and Target Impression Share retain Max CPC controls. Enhanced CPC remains another bidding option where eligible, but its manual starting bid is not a dependable ceiling: the system can adjust bids above it. Do not treat these choices as equivalent safeguards.
Why Microsoft Is Removing Max CPC From New Campaigns
Microsoft’s own stated reason is that a Max CPC limit can interfere with automated bidding by overriding your performance goals and creating spend-pacing irregularities, according to Search Engine Land’s reporting on the notification. When you cap CPC on a Maximize Conversions campaign, the system cannot bid up on the users most likely to convert, so it either underspends or misses your best auctions. Microsoft Ads Liaison Navah Hopkins has pointed advertisers to optimization experiments as the way to measure what a bidding change does before it runs at full budget, according to PPC Land’s report of her LinkedIn post.
You can read Microsoft’s own bidding docs to see how the platform frames it. In the Microsoft Advertising bid strategy help center, the company describes Max CPC as an optional control that overrides the algorithm. Optional is the key word. Microsoft is not saying CPC caps are bad. It is removing this optional control from the affected campaign setup paths.
The Test Plan For Your Existing Microsoft Ads Max CPC Accounts
Start reviewing campaign settings before October 1, but do not force an experiment to finish by that date. If the evidence is not ready, keep the existing cap while you evaluate the options. Here is a suggested sequence for planning the test. If you already manage paid media as one budget across channels, this sequence slots right into your normal quarterly audit.
Step 1. Inventory. Pull a report of every active Microsoft campaign that uses Max CPC today. Note the bid strategy, the current Max CPC value, the last 30-day spend, the last 30-day conversions, and the last 30-day average CPC. You need a baseline. Save it as a snapshot.
Step 2. Pick your test cohort. Choose three to five campaigns that carry Max CPC and are not your top revenue drivers. You want campaigns that matter enough to see real data, but not so critical that a bad week ruins the quarter. Ideally pick a mix of goal types. One Maximize Conversions. One Maximize Conversion Value. One Maximize Clicks if you use it.
Step 3. Run the experiment. Use Microsoft’s built-in optimization experiments to test each cohort campaign against a variant with Max CPC removed. Allow for learning and enough conversion evidence before judging results. Microsoft advises against evaluating Maximize Conversions and Target CPA during their initial learning period, and recommends allowing at least 30 conversions before evaluation. A fixed 14-day window is not proof that a test has finished. Track CPA, ROAS, click volume, average CPC, and impression share. Keep other settings stable during the test. If you need starter prompts to diagnose what the data is telling you, our PPC system prompts library has seven diagnostic prompts built for exactly this kind of read.
Step 4. Decide when the evidence is ready. Look at the delta. Possible outcomes include the following. Average CPC may rise while conversion volume keeps CPA stable. CPC may stay similar, or both CPC and CPA may worsen. Treat those patterns as questions to investigate alongside budget limits, tracking quality and conversion volume. A worse CPA alone does not establish that a portfolio strategy will fix the account. Document which outcome each campaign shows. Before removing Max CPC from an existing campaign, check the date: Search Engine Land reports that removing it after October 1 is irreversible. You will not be able to add it back to that campaign later. Keeping an existing cap and choosing a portfolio strategy for a new campaign are separate decisions.
How To Choose Between Portfolio Strategy And Trusting The Algorithm
After the tests, you have a decision to make for every new campaign you launch after October 1. Do you build it standalone and let Microsoft’s automated bidding run without a ceiling? Or do you attach it to a portfolio bid strategy so you can keep Max CPC?
The honest answer depends on three things. Your average CPC volatility. Your budget pacing risk. Your comfort with the algorithm.
Go standalone with no CPC ceiling when average CPCs in your niche are stable, budgets are healthy enough to absorb a bad auction day, and you have solid conversion tracking so the algorithm has good signal. Microsoft recommends allowing at least 30 conversions before evaluating Maximize Conversions, Target CPA or Target ROAS performance in its bid strategy documentation. That is evaluation guidance, not proof that a CPC ceiling is unnecessary. If you run home services or roofing, be more cautious. Our breakdown of the real cost of a roofing PPC lead shows how quickly one bad auction can wreck an account with tight lead economics.
Use a portfolio strategy with Max CPC when CPCs swing wildly, you are on a tight daily budget that could get eaten by one expensive click, or you are running a brand-new campaign with no historical data. The portfolio wrapper adds complexity but keeps the guardrail. If you are already using portfolios for other reasons, this is a no-brainer.
Consider Enhanced CPC or Target Impression Share when neither extreme fits. Enhanced CPC gives you a manual bid starting point with automated adjustments. Target Impression Share lets you name a share of voice goal and cap CPC inside that strategy. These strategies serve different goals; neither is automatically safer. Enhanced CPC can bid above its manual starting point. The same logic we used in choosing what to keep on and turn off in Meta Advantage+ applies here. Automation is a spectrum, not a switch.
What The Microsoft Ads Max CPC Change Means If You Manage Multiple Accounts
If you manage Microsoft accounts for clients, or run several of your own in-house, this update is going to show up in three conversations over the next quarter.
The first conversation is the stakeholder who reads about the change on LinkedIn and asks whether their campaigns are safe. Existing campaigns already using Max CPC by October 1 can retain it, but removing it after October 1 is irreversible. Save yourself repeated explanations by writing a short note now, before the questions start. Two paragraphs. What is changing. What you are doing about it.
The second conversation is the one about test results. Once learning and conversion evidence support a conclusion, review the results for each account. Some will need portfolio strategies going forward. Some will run fine without CPC ceilings. Put the recommendation in writing. If evidence is insufficient by October 1, retain the existing cap rather than remove it to meet an arbitrary testing deadline. This is the same kind of update you should be sending when platform reports change, like when your AI search terms report stopped showing what you thought it was showing.
The third conversation is the workflow one. If your team builds Microsoft campaigns through the UI, retrain everyone on the new setup path. If you use Microsoft Advertising Editor, expect the Max CPC field to disappear there too, though Microsoft has not announced timing. For API users, tool providers and Google Import, the September update gives a January 12 deadline for new campaigns and existing campaigns not already using Max CPC. It does not specify a year for that date. Confirm your provider’s implementation before changing build templates. Anyone still leaning on Editor scripts to standardize campaign builds should audit those templates now.
Frequently Asked Questions
Which Microsoft Ads bid strategies lose Max CPC on October 1, 2026?
New non-portfolio campaigns using Target CPA, Target ROAS, Maximize Conversions, Maximize Conversion Value, or Maximize Clicks lose the Max CPC field, according to Microsoft’s advertiser notification. Existing campaigns already using Max CPC by October 1 and portfolio bid strategies can keep it. Removing it from an existing campaign after October 1 is irreversible.
Do existing Microsoft campaigns lose their Max CPC setting?
Existing campaigns already using Max CPC by October 1 can keep it. Removing it after October 1 is irreversible. For API users, tool providers and Google Import, the reported January 12 deadline also covers existing campaigns not already using Max CPC. The report does not specify a year for January 12.
How can you still cap CPC on Microsoft Ads after October 1?
Attach the new campaign to a portfolio bid strategy or use Target Impression Share, which supports a max CPC control. Enhanced CPC is a separate option with automatic bid adjustments, not a dependable CPC ceiling.
What should you do before October 1?
Inventory the campaigns using Max CPC and plan a small optimization experiment. Allow for learning and enough conversion evidence; a fixed 14-day window does not establish a result. Keep an existing cap if you cannot yet support removing it, and remember that removal after October 1 is irreversible.
Ship The Test Plan, Not A Reaction
The teams that lose money on this change will be the ones who ignore it until October 2 and then discover their new campaign build broke. The teams that gain confidence will be the ones who use the time before October 1 to learn how their accounts actually behave without a CPC ceiling, then make deliberate choices about which campaigns need portfolio wrappers and which do not.
The Microsoft Ads Max CPC field was not magic. It was a safety net worth auditing. The removal is Microsoft’s way of forcing the audit. Do the tests. Save the results. Update your build playbooks. Then move on.
If you want help designing the experiments or interpreting results for your Microsoft accounts, book a free consultation with our paid media team.
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