diff --git a/admin/metabox/class-metabox.php b/admin/metabox/class-metabox.php
index 755005b5c26..abee35f247b 100644
--- a/admin/metabox/class-metabox.php
+++ b/admin/metabox/class-metabox.php
@@ -361,8 +361,17 @@ protected function render_hidden_fields() {
 		$screen          = WP_Screen::get();
 		$is_block_editor = $screen && $screen->is_block_editor();
 		if ( $is_block_editor && $this->get_metabox_post()->post_type === 'post' ) {
-			// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Output escaped in class.
-			echo new Meta_Fields_Presenter( $this->get_metabox_post(), 'content_planner' );
+			/**
+			 * Filter: 'wpseo_enable_ai_content_planner_inline_banner' - Allows hiding the AI Content Planner inline banner site-wide.
+			 *
+			 * Returning false stops the hidden meta inputs from being rendered, which the editor JS treats as "banner disabled".
+			 *
+			 * @param bool $enabled Whether the inline banner should be available in the editor. Default true.
+			 */
+			if ( apply_filters( 'wpseo_enable_ai_content_planner_inline_banner', true ) ) {
+				// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Output escaped in class.
+				echo new Meta_Fields_Presenter( $this->get_metabox_post(), 'content_planner' );
+			}
 		}
 
 		/**
diff --git a/packages/js/src/ai-content-planner/helpers/fields.js b/packages/js/src/ai-content-planner/helpers/fields.js
index 13f05947b7c..3969038c87f 100644
--- a/packages/js/src/ai-content-planner/helpers/fields.js
+++ b/packages/js/src/ai-content-planner/helpers/fields.js
@@ -22,10 +22,16 @@ const getInputValue = ( id ) => {
 };
 
 /**
- * Helper functions to get the value of whether the banner is dismissed or rendered.
- * @returns {boolean} True if the banner is dismissed or rendered, false otherwise.
+ * Helper function to get the dismissed state of the inline banner from the post meta.
+ *
+ * Returns true when the hidden input is missing, so a server-side filter that stops the input from rendering keeps the banner hidden site-wide.
+ *
+ * @returns {boolean} True if the banner is dismissed or its hidden input is absent, false otherwise.
  */
-export const getIsBannerDismissedFromInput = () => getInputValue( "yoast_wpseo_is_content_planner_banner_dismissed" ) === "1";
+export const getIsBannerDismissedFromInput = () => {
+	const input = document.getElementById( "yoast_wpseo_is_content_planner_banner_dismissed" );
+	return input === null || input.value === "1";
+};
 
 /**
  * Helper function to get the value of whether the banner is rendered.
diff --git a/packages/js/tests/ai-content-planner/helpers/fields.test.js b/packages/js/tests/ai-content-planner/helpers/fields.test.js
new file mode 100644
index 00000000000..ce9d26a976c
--- /dev/null
+++ b/packages/js/tests/ai-content-planner/helpers/fields.test.js
@@ -0,0 +1,31 @@
+import { getIsBannerDismissedFromInput } from "../../../src/ai-content-planner/helpers/fields";
+
+const INPUT_ID = "yoast_wpseo_is_content_planner_banner_dismissed";
+
+const renderInput = ( value ) => {
+	const input = document.createElement( "input" );
+	input.id = INPUT_ID;
+	input.type = "hidden";
+	input.value = value;
+	document.body.appendChild( input );
+};
+
+describe( "getIsBannerDismissedFromInput", () => {
+	afterEach( () => {
+		document.body.innerHTML = "";
+	} );
+
+	it( "returns true when the hidden input is absent so a server-side filter can hide the banner", () => {
+		expect( getIsBannerDismissedFromInput() ).toBe( true );
+	} );
+
+	it( "returns true when the hidden input value is \"1\"", () => {
+		renderInput( "1" );
+		expect( getIsBannerDismissedFromInput() ).toBe( true );
+	} );
+
+	it( "returns false when the hidden input value is \"0\"", () => {
+		renderInput( "0" );
+		expect( getIsBannerDismissedFromInput() ).toBe( false );
+	} );
+} );