The 2026 report: what actually changed
The IAB Europe 2026 State of Readiness Report surveyed 135 European digital advertising firms between November 2025 and January 2026. The headline finding is a clear shift: regulation has overtaken CSR as the primary sustainability driver. That's not a minor tweak to the narrative. It means compliance is no longer a nice-to-have box you tick for brand optics. It's the actual engine pushing firms to change how they buy, place, and measure advertising.
Two other shifts stand out for B2B service firms specifically:
- Employer reputation now outranks client pressure as a sustainability motivator. Firms are cleaning up their ad practices partly because talent expects it.
- AI content ingestion and traffic risks have emerged as the leading ecosystem challenge, ahead of economic pressures and ad fraud.
If you run a consultancy, agency, IT firm, or professional services practice in Belgium or the EU, this report is describing your advertising environment. Not some abstract future state. Right now.
What does this mean for B2B lead generation?
It means your website and your paid acquisition channels are operating in a fundamentally different environment than they were 18 months ago. The signals that used to power attribution are degrading. The platforms you rely on are under regulatory pressure. And the buyers you're trying to reach are more skeptical than ever.
Ad fraud is the clearest immediate threat. According to the 2026 State of Readiness Report, ad fraud concerns rose sharply in 2026, now affecting 55% of EU professional services ads. That's up from roughly 30% the year before. For B2B service firms running any kind of paid traffic, this matters directly: a meaningful portion of your clicks may not be real buyers.
The firms doing something about it aren't waiting for platforms to solve it. 63% of firms surveyed now implement best practices like avoiding made-for-advertising (MFA) sites and using lazy loading auction techniques. 44% are actively optimizing supply and demand paths. 41% are compressing creative assets to reduce waste and improve delivery quality.
These aren't just sustainability gestures. They're operational improvements that directly affect your cost per lead.
For consultancies and advisory firms, signal loss is compounding the problem. Cookie deprecation and EU privacy regulation are reducing attribution accuracy, which makes it harder to know what's actually driving your pipeline. If your reporting tells you a campaign is working but your sales team isn't seeing qualified leads, this is likely why.
How are B2B firms in Belgium and the EU responding?
The firms responding well share a few common traits. They're not treating sustainability and performance as separate conversations. They're treating measurement reform as a business priority, not a compliance exercise.
Here's what the data shows about current adoption rates, drawn from the full 2026 report:
- Environmental actions outpace social ones by roughly 10 percentage points. Carbon reduction tools are being adopted faster because standards exist. Social impact areas like privacy and accessibility lag behind, even though they rank highest under the Digital Markets Act.
- 70% of EU consultancies now cite employer reputation as a primary sustainability driver, with a measurable effect on talent retention in marketing and ad operations teams.
- 28% more firms adopted Science-Based Targets (SBTs) between 2025 and 2026, signalling that voluntary commitments are converting into structured frameworks.
The gap between environmental and social adoption is actually an opportunity. B2B firms that move early on DMA-aligned social metrics, specifically privacy compliance and accessibility in their buyer journeys, will be ahead of a wave that's coming regardless.
For IT and cybersecurity firms in Belgium, the EU AI Act (effective August 2026) adds another layer. Ad tech tools that use AI for targeting, personalization, or optimization will need to meet new transparency and accountability requirements. If you're using AI-powered campaign tools and haven't mapped them against the AI Act's risk tiers, that's a gap worth closing now.
What practical steps should B2B service firms take?
This is where most reports lose their usefulness. They describe the landscape well and then leave you with vague recommendations. Here's what we'd actually do.
1. Audit your ad campaigns for fraud and waste
Start with the basics. Are you running ads on verified inventory? Are you excluding MFA sites? Are you using any form of supply path optimization? The IAB Europe Sustainability Hub offers free benchmarking tools including GHG calculators that also surface inefficiencies in delivery. Even if carbon isn't your primary concern, the efficiency gains are real.
2. Align your measurement with DMA requirements
Legal, accounting, and financial services firms in particular need to take the Digital Markets Act seriously at the campaign level. The DMA's social metrics, covering privacy, accessibility, and fair data use, are areas where implementation lags far behind stated priority. Getting ahead of this isn't just compliance. It's a trust signal to B2B buyers who are increasingly scrutinizing how their service partners handle data.
3. Test incrementality instead of relying on last-click attribution
If your current reporting is based on last-click or even last-touch attribution, you're flying partially blind in a cookieless environment. Incrementality testing, running controlled experiments to measure the true lift from a campaign, is how the better-performing firms in the IAB survey are closing measurement gaps. The IAB 2026 State of Data Report highlights that AI-powered measurement tools are closing roughly 35% of attribution gaps in B2B campaigns. That's not a marginal improvement.
4. Prioritize private marketplace buying for B2B audiences
33% of firms in the IAB survey have already shifted buying patterns toward low-GHG private marketplaces. For B2B service firms, PMPs also offer better audience verification and less fraud exposure than open exchanges. If you're running programmatic campaigns targeting professional audiences in Belgium or the EU, PMPs should be your default, not your experiment.
5. Certify your measurement practices
The IAB Retail Media Certification is live now, with a transition to V2 by the end of July 2026. For HR and recruiting firms, engineering consultancies, or any B2B service firm partnering with retailers or e-commerce platforms, certified measurement builds trust in your attribution claims and makes your pipeline data more defensible to internal stakeholders.
In our experience, the firms that struggle most with lead generation from their websites aren't failing at creative or targeting. They're failing at measurement. They can't tell what's working, so they can't improve it, and they end up relying on referrals because at least those feel reliable. If that sounds familiar, the measurement conversation is where to start. See how we help B2B firms build websites that generate measurable leads.
Which B2B sectors face the most urgent pressure?
Not all sectors are equally exposed. Based on the 2026 IAB data and what we're seeing with clients, here's a quick read by sector:
Creative and communication agencies: The Creative Europe 2026 fund has allocated significant resources toward low-carbon ad innovation, making sustainability credentials a competitive differentiator when pitching to EU-funded clients. See how we work with creative agencies.
Consultancies and advisory firms: Signal loss and attribution degradation hit consultancies hard because their sales cycles are long and multi-touch. Incrementality testing and first-party data strategies are non-negotiable in 2026.
IT and cybersecurity firms: EU AI Act compliance for ad tech tools is the most immediate regulatory exposure. Firms that haven't audited their martech stack against the AI Act's requirements are carrying unquantified risk.
Legal, accounting, and financial services: DMA social metrics compliance yields measurable trust gains in B2B inbound pipelines. The firms that move early on privacy-first buyer journeys will have a genuine positioning advantage.
HR and recruiting firms: Certified measurement practices are directly tied to pipeline predictability. DE&I-focused campaigns aligned with DMA social metrics are also showing higher conversion rates in the current data. Explore our work with HR and recruiting firms.
Engineering and technical services: Ad fraud is a disproportionate risk for engineering firms running niche B2B campaigns where audience pools are smaller and fraudulent traffic is harder to filter. Supply path optimization and PMP buying are the clearest levers.
Is your website ready to convert the traffic you're paying for?
This is the question that ties everything together. You can fix your ad fraud exposure, tighten your measurement, and align with DMA requirements. But if the traffic you're generating lands on a website that doesn't speak to your buyer, doesn't build authority, and doesn't give visitors a clear reason to get in touch, you're just optimizing the top of a broken funnel.
In our experience, most B2B service firms in Belgium and the EU have this problem in reverse. They've invested in their website, it looks professional, but it's not doing anything for the business. The IAB 2026 data is a useful reminder that the external environment is getting harder, not easier. Paid channels are more expensive, more regulated, and more prone to fraud. Your website needs to work harder as an organic and inbound asset.
The firms that are generating consistent leads from their websites aren't doing anything exotic. They have clear positioning, a buyer journey that's built around how B2B decisions actually get made, and a system for continuously improving performance based on real data. That's what Orbit is built to do. It's also worth reading how Belgium's Google Ads probe in 2026 is reshaping positioning risk for B2B firms if you want the full picture of what's shifting in paid acquisition right now.
The bottom line
The IAB Europe 2026 State of Readiness Report is not a sustainability document in the narrow sense. It's a map of where B2B advertising is heading: more regulated, more scrutinized, more dependent on verified measurement and first-party data. The firms that treat this as a compliance burden will fall behind. The ones that treat it as a strategic opportunity to build more reliable pipelines will pull ahead.
The actions are clear. Audit for fraud and waste. Fix your measurement. Align with DMA social metrics. Shift toward verified inventory. And make sure your website is doing its job when the traffic arrives.
Ready to turn your website into a consistent lead source? Talk to us about how we build strategy-first websites for B2B service firms in Belgium and the EU.