Audit finds 34% of Amazon ad spend went to non-converting keywords

Sellers Umbrella says an internal audit of accounts across 11 global Amazon marketplaces found that 34% of ad spend from January through May 2026 went to keywords that generated no sales. The finding points to routine search-term management gaps that can quietly drain budgets even when overall revenue still looks healthy.

Why it matters: - A third of Amazon ad spend going to keywords with no sales means sellers can lose margin even when campaigns still appear to be working. - The waste can push brands to raise budgets and pay more for the same underperforming structure. - The finding underscores how weekly search-term management can affect profitability across marketplaces.

What happened: - Sellers Umbrella Inc. reviewed internal advertising data across 11 global marketplaces. - The audit covered January through May 2026. - The company found that 34% of ad spend across audited accounts went to keywords that produced no sales. - The pattern showed up across categories and budget sizes.

The details: - Many accounts were left on automated defaults set at launch and never revisited. - Automatic campaigns often kept running after winning search terms should have been moved into manual campaigns. - Broad match keywords expanded into irrelevant queries. - Negative keyword lists had often stopped growing months earlier. - Search term reports were reviewed rarely or not at all. - The waste was especially visible in accounts that went more than a quarter without a search-term review. - Secondary marketplaces showed heavier waste when campaigns had been duplicated from the home market and left unattended. - The finding also applied to some accounts already managed by agencies or freelancers. - Sellers Umbrella said the key check is the search term report, not ACOS alone. - The agency says its operating model uses weekly search-term audits, growing negative keyword lists, harvest routines that shift proven terms from automatic to manual campaigns, and bid changes tied to conversion data. - Clients receive reporting on spend, conversions, cuts, and reasons in plain terms each cycle.

Between the lines: - The audit suggests many sellers mistake rising ad costs and competition for the main cause of weaker efficiency, when poor account maintenance is also draining spend. - Amazon’s campaign recommendations are designed to expand reach, not protect margin, so sellers who accept every suggestion can end up feeding the same leak. - The message to brands using outside help is that management quality depends on routine search-term work, not just headline performance metrics. - Nirav Bhatt, founder of Sellers Umbrella Inc., said sellers are overspending because the platform is built to spend and someone has to check the search term report every week, not every quarter. - Bhatt said the issue is about managing spend, not avoiding Amazon advertising.

What's next: - Sellers can review their own accounts by pulling the last 60 days of search-term data, sorting by spend, and counting terms with meaningful spend and zero orders. - Sellers should also check when the negative keyword list was last updated. - Brands operating in multiple marketplaces should run the same review in each country. - Sellers Umbrella says its no-cost audit reviews campaign structure, search-term waste, negative keyword coverage, and conversion tracking accuracy before any engagement. - The company points readers to its published guide, how we manage Amazon ad spend, for the full methodology.

The bottom line: - Amazon ad waste can hide in plain sight, and weekly search-term cleanup appears to be the difference between healthy sales and money spent on keywords that never convert.