Banking and lending advertisers lost an average of $295,000 in wasted ad spend annually to invalid traffic, according to a report published today by IVT detection platform Lunio, with Google Search recording a higher fraud rate than any other Google campaign type in the category, a reversal of the pattern seen in most other industries.

Lunio, an invalid traffic detection and prevention platform, analyzed 86 million clicks across Google, Bing, LinkedIn, Meta, and a set of native and social platforms, covering the period from July 2025 through March 2026, according to the report. The study, focused specifically on paid advertising in the banking, lending, and credit sector, found an overall invalid traffic (IVT) rate of 5.92 percent for the category, according to Lunio, well above the 4.29 percent average the company separately measured for the IT and security industry.

The finding that stands out most, according to the report, is where the fraud concentrated. In most sectors, Search is the cleanest Google channel by a wide margin, benefiting from high commercial intent, established user behavior patterns, and years of platform-level filtering investment. Banking and lending inverted that pattern. Google Search carried an average IVT rate of 5.51 percent for the category, according to Lunio, the highest of any Google campaign type measured, ahead of Demand Gen at 3.32 percent and Performance Max at 3.21 percent.

Nick Morley, CEO of Lunio, tied the vulnerability directly to the economics of the sector. "Due to their reliance on premium CPCs, high-intent keywords and affiliates, banking and lending marketers are highly vulnerable to invalid traffic," Morley said, according to the report. "However, guardrails from major platforms and websites have fallen short, as malicious actors are routinely able to bypass these measures. By investing in tools that help them gain more transparency into traffic quality, banking and lending marketers can reduce their risk and maximize their ROAS through data-driven optimization."

Why Search became the weak point

Search advertising in banking and lending commands some of the highest cost-per-click rates in digital marketing, driven by intense competition for high-intent keywords tied to loans, mortgages, credit products, and financial services generally. That economic pressure, paradoxically, appears to be exactly what draws fraudulent activity toward the channel, rather than away from it. A click that costs $11.50 is a more attractive target for automated or manufactured traffic than a click costing a fraction of that amount, since the marginal revenue captured by whoever is generating the invalid click scales with the price the advertiser pays.

The quarterly data shows the problem did not appear suddenly and has not eased. According to Lunio, Google Search IVT for the category started at 5.46 percent in the third quarter of 2025 and climbed to 5.77 percent by the first quarter of 2026, a gradual upward drift across three consecutive quarters rather than a single anomalous spike. That pattern mirrors, in direction if not in scale, what Lunio found in its earlier report covering the IT and security industry, where Google Search IVT rose from 3.95 percent in the third quarter of 2025 to 4.78 percent in the first quarter of 2026, as PPC Land reported in June. Both verticals show Search IVT accelerating through the same nine-month window, though banking and lending's absolute rate runs higher throughout.

The category-wide figure of 5.92 percent likewise did not hold steady. Lunio's quarterly breakdown shows IVT for banking and lending brands at 4.72 percent in the third quarter of 2025, then climbing sharply to 6.65 percent in the fourth quarter, the highest figure recorded anywhere in the dataset, before easing only slightly to 6.38 percent in the first quarter of 2026. The fourth-quarter spike coincides with a period when many advertisers, including in financial services, tend to increase budgets ahead of year-end promotional pushes and into the new year, a pattern that other invalid-traffic research has also linked to periods of expanded, less curated ad delivery.

The size of the financial exposure

Lunio's report translates the category-wide rate into a concrete dollar estimate for a representative advertiser. For a banking and lending business spending $5 million annually on paid advertising, at an average cost-per-click of $11.50, the 5.92 percent IVT rate works out to approximately $295,000 in directly wasted ad spend each year, according to the report. That figure covers only the wasted media cost itself, calculated as the invalid share of total spend.

Lunio's report goes further, applying a conservative three-to-one return on ad spend ratio to estimate the revenue opportunity that wasted spend represents, rather than just the media cost. Under that assumption, the report estimates the lost revenue opportunity approaches $887,000 annually for the same representative advertiser, a figure that captures the downstream commercial impact of a fraudulent click rather than the isolated line-item cost. The report presents the three-to-one ratio as a conservative benchmark rather than a universal constant, and notes that any individual institution's actual return on ad spend may differ from that assumption.

It is worth noting a discrepancy between the two documents Lunio circulated alongside the report. The press release accompanying the data states the category-wide invalid traffic rate as 5.92 percent in every instance where the figure appears in the body text, and that is the number used throughout this article. A separate covering note distributed alongside the release referenced a figure of 5.29 percent in its subject line and opening paragraph. Because the release itself is consistent on 5.92 percent across multiple mentions, that is treated here as the operative figure for the category average.

LinkedIn: more than one in three clicks

Among all the individual channels Lunio measured for the banking and lending category, none came close to LinkedIn. The platform recorded an average IVT rate of 36.08 percent across the nine-month analysis period, according to Lunio, meaning more than one in three clicks attributed to LinkedIn advertising in this sector were invalid. The rate did not improve over time. It rose from 35.28 percent in the third quarter of 2025 to 37.09 percent in the first quarter of 2026, according to the report, a steady climb rather than a fluctuation.

That figure sits well above what Lunio measured for LinkedIn in its separate analysis of the IT and security industry, published on June 13, where the platform's average IVT rate across the same nine-month window was 15.34 percent, reaching 17.62 percent in the first quarter of 2026 alone. Both figures came from the same measurement provider using a comparable three-quarter structure, though the two reports used different underlying cost-per-click assumptions in their financial modeling, $11.50 for banking and lending against $8.00 for IT and security, reflecting the higher CPCs financial services advertisers typically pay. The gap between 36.08 percent and 15.34 percent, even accounting for methodology differences between the two studies, suggests that whatever structural factors drive invalid traffic on LinkedIn interact with something specific to the banking and lending vertical to produce a substantially worse outcome than in at least one other high-value B2B category the same firm has studied.

Bing and the content networks

Microsoft Ads, running on the Bing network, averaged a 13.72 percent IVT rate across the analysis period for banking and lending advertisers, according to Lunio, more than three times the category's blended Google average. The trajectory here was less gradual than elsewhere in the report. The rate nearly doubled from 8.39 percent in the third quarter of 2025 to 16.29 percent in the fourth quarter, before holding roughly steady at 16.48 percent in the first quarter of 2026.

Content distribution networks used by banking and lending brands also carried meaningful exposure, according to the report. Outbrain averaged a 9.32 percent IVT rate across the period, and Taboola averaged 7.88 percent. Neither of those figures appears with the same quarter-by-quarter breakdown as the platforms above in the material Lunio circulated, but both sit well above the industry-standard invalid traffic threshold that the Interactive Advertising Bureau has built into its own contract standards. The IAB's updated framework, addressing invalid traffic and non-billable impressions across the industry, treats general invalid traffic above 2 percent on an aggregate campaign basis as a threshold warranting remedies between buyers and sellers. Every channel Lunio measured in the banking and lending study, with the partial exception of certain Google campaign types, cleared that threshold by a wide margin.

TikTok and Meta

TikTok averaged a 6.38 percent IVT rate for banking and lending advertisers across the nine-month period, according to Lunio, higher than Meta's average of 4.27 percent over the same window. TikTok's quarterly figures moved less predictably than some of the other channels: the rate dipped from 6.21 percent in the third quarter of 2025 to 6.08 percent in the fourth quarter, then rose to its highest point of the period, 6.83 percent, in the first quarter of 2026. Meta, by comparison, peaked at only 4.94 percent in the fourth quarter of 2025, according to the report, before presumably settling elsewhere in the first quarter, though Lunio's release does not specify that final figure directly.

A vertical already under regulatory scrutiny

The elevated fraud exposure documented in Lunio's report arrives in a sector that has, separately, faced an intensifying wave of platform-level scrutiny over the past two years, for reasons distinct from invalid traffic but related to the same underlying vulnerability: banking and lending is a high-value, high-trust advertising category that attracts bad actors from multiple directions at once.

Google, as PPC Land reported on June 23, expanded mandatory financial services advertiser verification to 24 additional European Union and European Economic Area countries, bringing the total number of countries under that verification program to 42. Under that framework, financial advertisers entering the newly covered markets face a 30-day window to verify their regulatory credentials once enforcement begins in their target country, or risk having financial services ads restricted until the process completes. That verification requirement addresses a different threat than invalid traffic, namely unauthorized or unlicensed advertisers attempting to reach consumers directly, but both problems stem from the same structural reality that financial advertising commands premium value and consequently draws premium-grade abuse.

The connection between fraud infrastructure and financial-services-adjacent scam activity has also been documented from the consumer-protection side. A study covered by PPC Land in late June, conducted by the Future of Financial Intelligence Sharing research programme at the Royal United Services Institute, found that fraud cost the global economy an estimated $579.4 billion in 2025, and that scam operators frequently function as media buyers themselves, purchasing inventory through the same auctions legitimate advertisers use in order to reach financially distressed consumers. That research examined fraud at the level of scam campaigns targeting consumers directly, a distinct category from the invalid traffic Lunio measured inside legitimate advertisers' own campaigns, but the two speak to a common condition: the financial vertical sits at a convergence point for automated and human-directed abuse of digital advertising infrastructure.

How platform-level defenses have performed elsewhere

Lunio's own history of reporting offers a partial answer to why guardrails, in Morley's words, have "fallen short." The company's separate investigation into affiliate marketing, published on May 6, found that 24 percent of all affiliate traffic was invalid, and that affiliate click fraud cost advertisers in the United States alone an estimated $2.8 billion in 2025. Affiliate advertising is one of the channels the banking and lending sector relies on heavily, according to Morley's own comments in the report accompanying today's release, alongside premium CPCs and high-intent keywords.

Separately, a technical demonstration published in April by a Spanish digital advertising agency, detailed by PPC Land, showed that Google Ads IP exclusion lists, one of the few native tools advertisers have to block known fraudulent traffic sources, could be rendered ineffective through a technique that separates the IP address that harvests a valid click identifier from the IP address that later uses it to generate a charged click. That finding does not establish that the specific technique was responsible for any of the invalid traffic Lunio measured in the banking and lending study, since Lunio's methodology and Faktica's technical demonstration are unrelated investigations using different data. It does, however, illustrate a general principle relevant to interpreting Lunio's numbers: several of the defensive mechanisms advertisers rely on to filter invalid traffic have documented structural weaknesses, independent of any single platform's stated intentions.

What the report does not establish

Lunio's report, like most invalid traffic studies published by vendors in the space, draws on the company's own client base rather than a randomized, industry-wide sample, and the release accompanying today's findings does not specify how many individual advertisers or accounts contributed to the 86 million clicks analyzed. That does not invalidate the findings, but it does mean the precise figures reported here describe the banking and lending advertisers using Lunio's platform during the measurement window, rather than every banking and lending advertiser globally. How closely any single campaign matches this profile depends on factors including its specific channel mix, geographic markets, and existing fraud-prevention tooling, none of which the report breaks down at a level fine enough to generalize with precision.

The report also does not specify whether the accounts analyzed were running with or without active invalid-traffic filtering enabled at the time of measurement, a methodological detail that Lunio's earlier report on the IT and security industry did specify, describing that data as collected in "unprotected, monitor-only mode." Whether the banking and lending figures reflect the same unprotected measurement approach is not stated explicitly in the material reviewed for this article.

Timeline

  • July 2025 - Start of the nine-month measurement period Lunio used for its banking, lending, and credit invalid traffic analysis.
  • Third quarter 2025 (July to September 2025) - Category-wide IVT for banking and lending measured at 4.72 percent; Google Search IVT at 5.46 percent; LinkedIn IVT at 35.28 percent; Bing IVT at 8.39 percent.
  • Fourth quarter 2025 (October to December 2025) - Category-wide IVT rises to 6.65 percent, the highest quarterly figure in the dataset; Bing IVT nearly doubles to 16.29 percent; Meta IVT peaks at 4.94 percent.
  • First quarter 2026 (January to March 2026) - Category-wide IVT eases slightly to 6.38 percent; Google Search IVT reaches 5.77 percent; LinkedIn IVT reaches 37.09 percent; TikTok IVT reaches its period high of 6.83 percent.
  • March 2026 - End of the nine-month measurement period.
  • July 7, 2026 - Lunio publishes the banking, lending, and credit invalid traffic report, disclosing an overall 5.92 percent category IVT rate and an estimated $295,000 in annual wasted ad spend per representative advertiser.

Summary

Who: Lunio, an invalid traffic detection and prevention platform, published the report. Nick Morley, the company's CEO, is quoted directly. The findings concern banking, lending, and credit advertisers running paid campaigns across Google, Bing, LinkedIn, Meta, and other native and social platforms.

What: A nine-month analysis of 86 million clicks found an overall invalid traffic rate of 5.92 percent for the banking and lending category, translating to an estimated $295,000 in annual wasted ad spend for a representative advertiser spending $5 million per year. Google Search recorded the highest IVT rate of any Google campaign type in the category, at 5.51 percent, a reversal of the pattern typically seen in other industries. LinkedIn recorded the highest rate of any channel measured, at 36.08 percent.

When: The data covers July 2025 through March 2026, split across three quarters. Lunio published the report today, July 7, 2026.

Where: The analysis covers paid advertising activity across Google, Bing, LinkedIn, Meta, and unspecified native and social platforms, without specifying particular countries or regions.

Why: The report matters because it identifies banking and lending as a category where standard assumptions about channel safety do not hold, particularly regarding Google Search, and because it quantifies a specific financial exposure tied to invalid traffic in a sector that already faces separate regulatory verification requirements and heightened scrutiny over fraud-adjacent activity targeting financially vulnerable consumers.