Google’s Audience Minimum Just Dropped to 100 Users: Why Small Budgets Just Got More Powerful

Google quietly made one of its most SME-friendly changes in years, and most businesses have no idea it happened.

If you’ve ever been told your audience is “too small” for remarketing on Search or YouTube, that’s no longer the case. In December 2025, Google finalised a change that reduces the minimum audience size from 1,000 users down to just 100 across all networks and audience types.

For Australian small and medium businesses running Google Ads on modest budgets, this is a big deal. Strategies that were impossible just weeks ago are now on the table.

Here’s what changed, why it matters, and how to take advantage of it.

What is the new minimum audience size for Google Ads remarketing?

Google has reduced the minimum audience size required to run remarketing and customer list campaigns from 1,000 active users to just 100.

Google began gradually lowering thresholds throughout 2025, starting with Customer Match lists for Search campaigns in May. By December 2025, they’d standardised the 100-user minimum across the entire platform. For smaller advertisers, this removes a long-standing barrier to personalisation and first-party data activation within Google Ads.

Why couldn’t small businesses use Google Ads remarketing before?

The typical SME website gets somewhere between 500 and 1,500 visitors per month. According to HubSpot’s web traffic research, 46% of websites get between 1,001 and 15,000 total monthly visitors, and that’s total visits, not unique users.

But Google’s audience requirements aren’t based on raw website traffic. They’re based on “active users”, people who’ve engaged with your site and can be identified for targeting. That number is always smaller than your raw traffic due to cookie blocking, privacy settings, and the 30-day activity window.

Let’s say you run a Perth-based business with 800 monthly website visitors. After factoring in:

• Users with cookies blocked or using privacy browsers
• Users who clear cookies between visits
• The 30-day activity window
• Cross-device tracking limitations

You might end up with 200-300 users who actually qualify for your remarketing audience. Under the old rules, that meant remarketing was impossible. You needed 1,000 active users, and most SMEs simply couldn’t get there, let alone segment users into different remarketing offers.

This forced many SME advertisers into broad targeting strategies: paying to reach people who’d never heard of them, rather than re-engaging the warm audiences who’d already shown interest. It was an inefficient use of limited budgets.

What remarketing strategies work for small budgets?

The reduced threshold opens up three key opportunities for SME advertisers:

Search remarketing for niche businesses. If you’re a B2B service provider with a modest but engaged audience — say, 150 prospects who’ve visited your services pages — you can now target them directly on Search by bidding higher on ‘engaged users’ as their second website visit would be much more likely to convert. When they’re actively Googling solutions you offer, your ad can appear. Previously, this audience would have been too small to use.

YouTube ads for smaller audiences. Video advertising on YouTube previously required 1,000 active users. Now it’s 100. A local retailer or professional services firm can run video ads specifically to people who’ve already visited their website, without needing enterprise-level traffic volumes.

Customer Match for modest email lists. If you have a customer email list of 200-300 people, you can now upload it and target those users across Search, Display, and YouTube. Previously, Customer Match for Search required 1,000 users, meaning smaller customer databases couldn’t access the most intent-rich placements.

How do I check my Google Ads audience size?

If you’re already running Google Ads, checking your audience eligibility takes about two minutes:

Audiences you dismissed months ago might now be usable. If you’d previously written off remarketing because your lists were under 1,000 users, it’s worth logging back in. Anything over 100 is now fair game.

Google’s audience segment documentation has the full details on how segment sizes are calculated and why they might differ from your raw traffic numbers.

What do you need for Google Ads remarketing to work?

Smaller audiences can now work, but only if your tracking is set up properly.

For remarketing lists to populate, you need either the Google Ads tag or GA4 linked to your account, with the appropriate audience definitions configured. For Customer Match, your uploaded data needs to be correctly formatted and hashed so Google can match it to user accounts.

Match rates matter more at smaller scales. If you upload 200 email addresses but only 80 match to Google accounts, you’re still under the threshold. Data quality — correct formatting, up-to-date contact information, proper consent — directly affects whether your audiences will be large enough to use.

The upside is that 100 highly-engaged users who’ve already interacted with your business can outperform 1,000 cold prospects. Remarketing works because you’re reaching people with existing awareness and interest. Smaller, warmer audiences often convert better than larger, colder ones.

This is where getting more leads from the same marketing spend becomes even more relevant. The combination of proper conversion tracking, well-defined audiences, and the new lower thresholds creates opportunities that didn’t exist before.

Should small businesses use Google Ads remarketing now?

If you’re running Google Ads on a modest budget, this change opens doors that were previously closed.

It’s worth revisiting audience strategies that were dismissed in the past. Niche targeting is now viable for businesses that don’t have enterprise-level traffic. You can reach past visitors on Search and YouTube without needing thousands of users in your lists.

For Display campaigns, the threshold was already 100 users — so this change primarily affects Search, YouTube, and cross-network Customer Match targeting. But the standardisation across all networks simplifies campaign setup and means you can apply the same audience segments everywhere.

We’re currently reviewing client accounts to identify audiences that are newly viable under the reduced thresholds. If you’ve got remarketing lists sitting unused because they were “too small,” now’s the time to revisit them.

Zac Fitzpatrick

PPC Service Lead