diff --git a/packages/gatsby-plugin-google-tagmanager/src/__tests__/__snapshots__/gatsby-ssr.js.snap b/packages/gatsby-plugin-google-tagmanager/src/__tests__/__snapshots__/gatsby-ssr.js.snap
index a3ecb72dd539b..3f0e6c3811180 100644
--- a/packages/gatsby-plugin-google-tagmanager/src/__tests__/__snapshots__/gatsby-ssr.js.snap
+++ b/packages/gatsby-plugin-google-tagmanager/src/__tests__/__snapshots__/gatsby-ssr.js.snap
@@ -8,4 +8,4 @@ exports[`gatsby-plugin-google-tagmanager defaultDatalayer should add a static ob
 
 exports[`gatsby-plugin-google-tagmanager should load gtm 1`] = `"(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl+'';f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer', 'undefined');"`;
 
-exports[`gatsby-plugin-google-tagmanager should load gtm 2`] = `"<iframe src=\\"https://www.googletagmanager.com/ns.html?id=undefined\\" height=\\"0\\" width=\\"0\\" style=\\"display: none; visibility: hidden\\"></iframe>"`;
+exports[`gatsby-plugin-google-tagmanager should load gtm 2`] = `"<iframe src=\\"https://www.googletagmanager.com/ns.html?id=undefined\\" height=\\"0\\" width=\\"0\\" style=\\"display: none; visibility: hidden\\" aria-hidden=\\"true\\"></iframe>"`;
diff --git a/packages/gatsby-plugin-google-tagmanager/src/gatsby-ssr.js b/packages/gatsby-plugin-google-tagmanager/src/gatsby-ssr.js
index aaffb352d2e40..c79e5f11cb38d 100644
--- a/packages/gatsby-plugin-google-tagmanager/src/gatsby-ssr.js
+++ b/packages/gatsby-plugin-google-tagmanager/src/gatsby-ssr.js
@@ -9,7 +9,7 @@ const generateGTM = ({ id, environmentParamStr, dataLayerName }) => stripIndent`
   })(window,document,'script','${dataLayerName}', '${id}');`
 
 const generateGTMIframe = ({ id, environmentParamStr }) =>
-  oneLine`<iframe src="https://www.googletagmanager.com/ns.html?id=${id}${environmentParamStr}" height="0" width="0" style="display: none; visibility: hidden"></iframe>`
+  oneLine`<iframe src="https://www.googletagmanager.com/ns.html?id=${id}${environmentParamStr}" height="0" width="0" style="display: none; visibility: hidden" aria-hidden="true"></iframe>`
 
 const generateDefaultDataLayer = (dataLayer, reporter, dataLayerName) => {
   let result = `window.${dataLayerName} = window.${dataLayerName} || [];`