Click Fraud

Google Ads IP Exclusion: Why It Doesn't Cut It for 2026

By Elena Rodriguez

Reviewed by Senior Media Buyers

IP exclusions in Google Ads are a decent first step, but they can't handle sophisticated invalid traffic from residential proxies, click farms, or AI agents. Going into 2026, you need managed protection that works with Performance Max and modern SIVT.

What Google Ads IP Exclusion Actually Does and Doesn't Do

Google Ads IP exclusion is a campaign-level setting that stops your ads showing to certain IP addresses. You can add up to 500 IPs per campaign, and it costs nothing. It's handy for blocking your own office, known competitors, or recognised bot IPs. But beyond that, it's not much use.

The trouble is that most modern invalid traffic doesn't come from fixed IPs. Residential proxies, click farms, and AI agents cycle through millions of IPs, many from legitimate ISPs. By the time you spot and block a bad IP, the fraudster has already moved on. IP exclusion is a reactive, manual tool that can't keep pace with automated fraud.

Industry estimates suggest 14-25% of paid clicks could be invalid, with the bulk being sophisticated SIVT that IP blocklists miss. Google's own invalid traffic detection catches some of it, but it's not enough to fully protect your budget.

The Gaps: Performance Max and Modern SIVT

Performance Max campaigns pose a particular problem. Google blocks third-party access to the PMax API, so self-serve IP-blocking tools can't connect to it. If you're running PMax, you can't use automated IP exclusion services. That leaves you with manual IP exclusion only, which as we've seen is ineffective.

Meanwhile, SIVT is exploding. AI-agent traffic grew roughly 78 times year on year across 2024 and 2025, according to multiple security reports. These agents mimic human behaviour, clicking on ads and even filling out forms. They use residential proxies that look like real users. No IP blocklist can stop them.

Click farms are getting clever too. They use thousands of real devices with unique IPs, making them indistinguishable from legitimate users at the IP level. IP exclusion is powerless here.

Detection Signals That IP Exclusion Misses

To catch modern click fraud, you need to analyse behavioural signals, not just IP addresses. Here are key indicators that IP exclusion can't spot:

• Click timing patterns: Bots click at inhuman speeds or in predictable intervals.
• Mouse movement and scroll: Real users move cursors and scroll; bots often don't.
• Session duration: Bots may bounce instantly or stay on a page for exactly the same time.
• Device and browser fingerprint: Fraudsters may use headless browsers or spoofed user agents.
• Conversion funnel anomalies: Plenty of clicks but not a single conversion, or conversions that happen way too quickly.

Managed click-fraud protection services use machine learning on these signals to block fraud as it happens. They also handle Google refunds for invalid traffic through the invalid traffic refund process.

Practical Steps: Using IP Exclusions Wisely

Even though IP exclusion has its limits, you should still include it as part of a multi-layered defence. Here's the right way to go about it:

• Exclude your own IPs: Add your office, home, and VPN IPs to stop yourself from clicking on your own ads.
• Exclude known competitor IPs: If you catch a competitor clicking your ads, block their whole IP range.
• Exclude data centre IPs: Use IP range lists from providers like AWS, Google Cloud, or Azure to block datacentre traffic that isn't your target audience.
• Review your click logs: Look for IPs that click repeatedly in a short window, or that have a very high click-to-conversion ratio.
• Update regularly: Fraudsters cycle through IPs, so check and update your exclusion list every week.

But bear in mind: these steps only catch the low-hanging fruit. For proper protection, you need a managed service that covers the gaps.

Why Managed Click-Fraud Protection Will Be Essential in 2026

DIY IP blockers can't protect Performance Max because Google blocks their API access. They also can't detect SIVT from residential proxies or AI agents. That's why managed click-fraud protection is fast becoming standard for serious advertisers.

Managed services like Unled Network offer round-the-clock monitoring, behavioural analysis, and automatic IP exclusion updates. They also take care of Google invalid-traffic refund recovery, a time-consuming job most advertisers just ignore. With no annual lock-in, you can start protecting your campaigns right away.

For advertisers spending more than $10,000 a month on Google Ads, the ROI of managed protection speaks for itself: it typically saves 10 to 30% of wasted spend, and the refunds alone often cover the cost.

How to Get Started with IP Exclusion and Beyond

Start by rolling out basic IP exclusions as outlined above. Then audit your click data for anything unusual. If you spot suspicious patterns, consider bringing in a managed protection service.

When you're evaluating services, look for:

• Support for Performance Max (via workarounds or direct integration).
• Real-time behavioural analysis, not just IP blocking.
• Automated refund recovery for Google invalid traffic.
• No long-term contracts.

The threat landscape is shifting fast. Relying on IP exclusion alone is just a sticking plaster; you need a proper immune system for your ad budget.

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