Enhanced CPC: What It Was and What to Use After the 2025 Retirement

Enhanced CPC (ECPC) was retired by Google for Search and Display campaigns in March 2025, with remaining campaigns auto-migrated to Manual CPC. If you landed here from an old tutorial or are staring at a legacy campaign, you need to know what ECPC was, why it is gone, and which Google Ads bidding strategy to use instead in 2026.

Google announced the end of Enhanced CPC in mid-2024, closing a chapter in paid search automation. ECPC sat between full manual control and full Smart Bidding -- a half-step that made sense when Maximize Conversions and Target CPA were still maturing but became redundant once those strategies proved they could outperform the hybrid approach on every metric that matters. The retirement was not a penalty; Google was removing a feature the platform no longer needed.

For startup growth teams and paid-media operators who relied on ECPC as a "safe" automated layer, the retirement forces a clean decision: commit to Manual CPC while you build data, or commit to Smart Bidding once you clear the signal threshold. There is no longer a middle ground. This post covers what ECPC did, why Google retired it, and exactly which strategy to switch to -- organized by your account's data maturity.

TL;DR: Enhanced CPC

Enhanced CPC was a hybrid bid strategy that Google deprecated in 2024 and fully retired for Search and Display in March 2025. Remaining ECPC campaigns were auto-migrated to Manual CPC, preserving max CPC bids but removing the algorithmic adjustment layer. Replace ECPC with Manual CPC if under 15 conversions per 30 days, or with Maximize Conversions, Target CPA, or Target ROAS once you clear that threshold with adequate value tracking.

• ECPC was a bridge between Manual CPC and Smart Bidding, retired March 2025
• Campaigns were auto-switched to Manual CPC with max CPC bids preserved
• Replace with Manual CPC below 15 conversions/30d; Smart Bidding above that threshold
• Do not confuse ECPC with Enhanced Conversions -- they share a word but are unrelated

What Was Enhanced CPC and Why Did Google Retire It?

Enhanced CPC was a bid strategy that combined manual max CPC bidding with an algorithmic adjustment layer. For each auction, Google predicted whether a click was likely to convert and adjusted your manual bid up or down accordingly. The promise was simple: keep manual control of the bid ceiling while letting an algorithm optimize at the margins.

Google introduced ECPC in 2010, long before Smart Bidding matured. At the time, the platform's models had fewer signals and less confidence -- ECPC was a practical compromise. Over the next 15 years, Smart Bidding grew to ingest thousands of signals per query (device, location, time of day, audience lists, remarketing state, browser, and more), optimizing bids at the impression level. ECPC, by contrast, used a narrower signal set and a tighter adjustment band. Google announced deprecation in 2024 and retired ECPC for Search and Display in March 2025. Smart Bidding does what ECPC did, better -- maintaining a legacy strategy with no meaningful use case was overhead the platform did not need.

How Did Enhanced CPC Work Before Deprecation?

Understanding the mechanics explains why the retirement is less of a loss than operators might fear. ECPC was a portfolio-level cost-per-click adjustment layer, not an auction-time bid engine. When you enabled ECPC on a Manual CPC campaign, Google preserved your manual max CPC bid and overlaid a conversion-likelihood model that adjusted that bid per auction -- typically within a 30 percent band, up or down.

The key constraint: ECPC only adjusted bids when the model detected a measurable conversion-probability difference. If the model was uncertain -- common in low-volume accounts -- it did nothing, and the campaign ran as standard Manual CPC. This matters for migrating today. If your ECPC campaign was low volume and the adjustment layer rarely fired, your effective strategy was already Manual CPC. The retirement simply formalized it.

ECPC also did not bid at auction time with the full signal set Smart Bidding uses today. Smart Bidding evaluates each impression in real time against user-context signals and computes an optimal bid. ECPC used a coarser model on a narrower signal slice -- directionally helpful but nowhere near the precision Target CPA or Maximize Conversions delivers.

What Should You Use Instead of Enhanced CPC in 2026?

The answer depends on your conversion data maturity. Smart Bidding needs conversion history to train its models. Google's documented minimum is 15 conversions in 30 days for Maximize Conversions and Target CPA campaigns. For Target ROAS, many practitioners advise 50 or more for stability. Below those thresholds, Manual CPC is the only viable option.

Accounts with zero or single-digit conversions should stay on Manual CPC until they reach the 15-conversion floor. This is not opinion -- it is the signal requirement Smart Bidding needs to function. Switching prematurely produces erratic CPA and wasted spend.

For accounts meeting the threshold, the next question is whether to pair Smart Bidding with a target. If you know your target CPA or ROAS from historical data, set it. If not, start without a target for two to four weeks, observe the resulting CPA or ROAS, then layer it on. For a deeper walkthrough of each strategy's trade-offs, see our Google Ads Smart Bidding strategies guide.

How Do You Choose Between Manual CPC and Smart Bidding Now?

The ECPC retirement removes the middle option. For Search and Display campaigns, the fork is binary: Manual CPC or Smart Bidding. No third choice exists.

The decision reduces to conversion volume. Below 15 conversions in 30 days, Manual CPC is your only reliable option. Smart Bidding models need enough positive labels to learn what a converting user looks like, and below roughly 15 conversions per month, the model lacks the statistical power to generalize.

For accounts at or above the 15-conversion threshold, the question shifts to "which Smart Bidding strategy matches my objective?" Lead volume with value tracking: Maximize Conversion Value. Specific cost-per-acquisition: Target CPA (from historical data, not a guess). Revenue-to-spend ratio: Target ROAS with a target grounded in margin calculations.

Bid strategy transitions produce a temporary performance wobble. The learning period lasts five to seven days. Operators switching from Manual CPC to Maximize Conversions should expect volatile CPA during week one and should hold adjustments until the model converges. Budget for a two-week evaluation window. If you are managing Smart Bidding strategies for the first time, plan for this learning curve.

What Happened to Campaigns Still Using Enhanced CPC?

When the March 2025 deadline arrived, Google performed a setting-level migration: campaigns configured with Enhanced CPC were switched to standard Manual CPC, and the manual max CPC bid was preserved. The algorithmic adjustment layer was removed. Campaigns continued running, now with pure Manual CPC and no automated bid adjustments.

This migration was silent for most advertisers. Campaigns did not go dark. For accounts where ECPC ran on low volume with the adjustment layer rarely firing, the impact was near zero -- the campaign had been effectively Manual CPC for months.

Accounts that actively relied on ECPC's adjustment layer -- typically mid-volume with 20-50 monthly conversions -- probably saw a performance shift post-migration. If the layer was raising bids on likely converters and lowering them on likely non-converters, removing it meant losing that edge. For these accounts, the path forward is clear: if conversion volume meets the threshold, migrate to Smart Bidding rather than staying on Manual CPC indefinitely. Manual CPC is a floor while building data, not a destination. The same framework applies to ad operations for startups -- the right level of automation is a function of data maturity.

What Is the Difference Between Enhanced CPC and Enhanced Conversions?

This is the single most common confusion in the Google Ads bidding landscape. Enhanced CPC and Enhanced Conversions share two words and roughly zero functionality. They address entirely different problems.

Enhanced CPC was a bid strategy. It adjusted your manual max CPC bid per auction based on predicted conversion probability. It sat in the "Bidding" section of campaign settings. It is retired for Search and Display.

Enhanced Conversions is a conversion measurement upgrade. It improves tracking accuracy by sending hashed first-party customer data -- email addresses or phone numbers -- to Google when a conversion fires, matching against Google's signed-in user database to recover conversions lost to cookie blocking and cross-device browsing. Enhanced Conversions is current, recommended, and available across Search, Display, Demand Gen, Performance Max, and YouTube. It has nothing to do with bid strategy.

To remember the split: if the question is "how does Google decide what to bid?", it is bid strategy (ECPC -- retired). If the question is "how does Google know a conversion happened?", it is conversion tracking (Enhanced Conversions -- active). For a full walkthrough, see our Enhanced Conversions guide.

How Should Startups Audit Migrated ECPC Campaigns?

If your account had campaigns on Enhanced CPC before March 2025, they are now running on Manual CPC with old max CPC bids preserved. The migration was automatic but minimal -- Google switched the strategy label and nothing else. The audit is on you. Here is the checklist:

1. Confirm the strategy migration. Verify each formerly-ECPC campaign now reads "Manual CPC" in Google Ads. Check that max CPC bids at the keyword level match pre-migration expectations.
2. Pull trailing-30-day conversion volume. For each migrated campaign, pull total conversions from the last 30 days. This number -- not gut feel -- determines your path forward.
3. Check conversion tracking health. Under Tools > Measurement > Conversions, verify primary conversion actions are firing and tagged correctly. If your Google Ads conversion tracking setup is broken, neither Smart Bidding nor Manual CPC can perform well.
4. Route to Manual CPC or Smart Bidding. Fewer than 15 conversions/30d: stay on Manual CPC. Build volume. Fifteen or more: migrate to the strategy matching your objective (see the decision table above).
5. Set realistic bids for the "wait and build" phase. If staying on Manual CPC, audit keyword-level max CPC bids using Keyword Planner and historical CPA data. The auto-migration preserved old bids, but the market has moved.
6. Enable Enhanced Conversions. Enhanced Conversions improves tracking accuracy regardless of bid strategy. Enable it now even if staying on Manual CPC so you are ready when you cross the 15-conversion threshold.
7. Set a 30-day reminder to re-evaluate. Campaigns grow, seasonality shifts. Schedule a check-in, re-read conversion volume, and adjust your strategy. Cross the threshold? Migrate to Smart Bidding.
8. Document the audit. Record the date, each campaign's strategy, conversion volume, and the decision (stay Manual CPC or migrate). This log answers "why are we still on Manual CPC?" six months from now.

For lean startup ad teams, this audit takes under an hour for accounts with fewer than 20 campaigns. The real investment is monitoring the strategy migration through the learning period if you switch to Smart Bidding. Plan accordingly.

Frequently Asked Questions

Is Enhanced CPC Still Available in Google Ads?

No. Google deprecated Enhanced CPC for Search and Display campaigns and completed the retirement in March 2025. Campaigns still using ECPC were automatically migrated to standard Manual CPC. Enhanced CPC remains available only for Google Shopping campaigns as of 2026.

What Did Enhanced CPC Actually Do?

Enhanced CPC was a hybrid bid strategy that took your manual max CPC bid and automatically adjusted it up or down for each auction based on the predicted likelihood that the click would convert. It was a transitional feature between fully manual bidding and fully automated Smart Bidding, giving advertisers some algorithmic help without surrendering full control of the bid.

What Should You Use Instead of Enhanced CPC in 2026?

Use Manual CPC if you have fewer than 15 conversions in 30 days and lack signal for Smart Bidding. Use Maximize Conversions (optionally with a Target CPA target) if you have 15-30 conversions and no conversion value data. Use Target ROAS if you have 15-50 conversions with accurate conversion value. Use Maximize Conversion Value if you have high volume and reliable value tracking.

What Is the Difference Between Enhanced CPC and Enhanced Conversions?

They are unrelated features that share a word. Enhanced CPC was a bid strategy that adjusted manual bids for predicted conversion likelihood. Enhanced Conversions is a conversion measurement upgrade that sends hashed first-party customer data to Google to recover conversions lost to cookie blocking, improving the signal Smart Bidding relies on. Enhanced Conversions is current and recommended; Enhanced CPC is retired.

What Happens to Campaigns That Were Still Using Enhanced CPC When It Retired?

Google automatically migrated remaining Enhanced CPC campaigns for Search and Display to standard Manual CPC, preserving the manual max CPC bid but removing the algorithmic adjustment layer. Advertisers who relied on ECPC should audit those migrated campaigns, evaluate their conversion volume, and move to the appropriate Smart Bidding strategy once they meet the data requirements.

Key Takeaways

1. Enhanced CPC was fully retired for Search and Display campaigns in March 2025. Remaining campaigns were auto-migrated to Manual CPC, preserving max CPC bids but removing the per-auction adjustment layer.
2. ECPC was a transitional feature -- Manual CPC plus a conversion-likelihood adjustment -- that predated Smart Bidding. The platform outgrew it once Target CPA and Target ROAS matured.
3. The replacement depends on conversion volume: Manual CPC below 15 conversions per 30 days, Maximize Conversions or Target CPA at 15-30, and Target ROAS or Maximize Conversion Value above that with reliable value data.
4. Do not confuse Enhanced CPC (a retired bid strategy) with Enhanced Conversions (a current conversion tracking upgrade). They share a word but are unrelated features.
5. Accounts that relied on ECPC and have sufficient conversion volume should migrate to Smart Bidding -- Manual CPC is a floor while building data, not a permanent destination.
6. Audit every migrated campaign: check the strategy label, pull 30-day conversion volume, verify tracking health, and make a documented decision to stay Manual CPC or migrate.
7. The ECPC retirement removes the middle ground between manual and automated bidding. There is no longer a half-step. Commit based on data maturity and re-evaluate every 30 days.