diff --git a/src/modal-checkout/checkout.scss b/src/modal-checkout/checkout.scss
index 01b88255b..53090590e 100644
--- a/src/modal-checkout/checkout.scss
+++ b/src/modal-checkout/checkout.scss
@@ -985,6 +985,10 @@
 		margin-top: 0;
 	}
 
+	.woocommerce .woocommerce-notices-wrapper .woocommerce-error.newspack-ui__notice--error {
+		padding: var(--newspack-ui-spacer-2, 12px);
+	}
+
 	.modal-processing {
 		opacity: 0.5;
 	}
diff --git a/src/modal-checkout/index.js b/src/modal-checkout/index.js
index 5238186d5..a327c90ba 100644
--- a/src/modal-checkout/index.js
+++ b/src/modal-checkout/index.js
@@ -40,8 +40,9 @@ import { domReady, onCheckoutPlaceOrderProcessing } from './utils';
 		}
 
 		function clearNotices() {
+			$( '.woocommerce-notices-wrapper' ).empty();
 			$(
-				`.woocommerce-NoticeGroup-checkout, .${ CLASS_PREFIX }__inline-error, .woocommerce-error, .woocommerce-message, .wc-block-components-notice-banner, .woocommerce-notices-wrapper`
+				`.woocommerce-NoticeGroup-checkout, .${ CLASS_PREFIX }__inline-error, .woocommerce-error, .woocommerce-message, .wc-block-components-notice-banner`
 			).remove();
 		}
 
@@ -786,6 +787,70 @@ import { domReady, onCheckoutPlaceOrderProcessing } from './utils';
 					form.removeClass( 'modal-processing' );
 					return true;
 				}
+
+				/**
+				 * Watch for Express Checkout errors added to the checkout container.
+				 * Express Checkout (GPay/Apple Pay) uses the Store API which doesn't trigger
+				 * the standard WooCommerce checkout_error event.
+				 */
+				function observeExpressCheckoutErrors() {
+					if ( ! container ) {
+						return;
+					}
+
+					const ERROR_HANDLED_ATTR = 'data-newspack-error-handled';
+
+					const handleExpressCheckoutError = errorNode => {
+						if ( errorNode.hasAttribute( ERROR_HANDLED_ATTR ) ) {
+							return;
+						}
+						errorNode.setAttribute( ERROR_HANDLED_ATTR, 'true' );
+
+						$( errorNode ).addClass( `${ CLASS_PREFIX }__notice ${ CLASS_PREFIX }__notice--error` );
+						container.dispatchEvent( placeOrderErrorEvent );
+						errorNode.scrollIntoView( { behavior: 'smooth', block: 'center' } );
+					};
+
+					const isErrorNode = node => {
+						if ( node.classList?.contains( 'woocommerce-error' ) ) {
+							return true;
+						}
+						if ( node.classList?.contains( 'wc-block-components-notice-banner' ) && node.classList?.contains( 'is-error' ) ) {
+							return true;
+						}
+						return false;
+					};
+
+					const observer = new MutationObserver( mutations => {
+						for ( const mutation of mutations ) {
+							for ( const node of mutation.addedNodes ) {
+								if ( node.nodeType !== Node.ELEMENT_NODE ) {
+									continue;
+								}
+								if ( isErrorNode( node ) ) {
+									handleExpressCheckoutError( node );
+									return;
+								}
+								const nestedError = node.querySelector?.( '.woocommerce-error, .wc-block-components-notice-banner.is-error' );
+								if ( nestedError ) {
+									handleExpressCheckoutError( nestedError );
+									return;
+								}
+							}
+						}
+					} );
+
+					observer.observe( container, { childList: true, subtree: true } );
+					return observer;
+				}
+
+				const expressCheckoutErrorObserver = observeExpressCheckoutErrors();
+				if ( expressCheckoutErrorObserver ) {
+					const disconnect = () => expressCheckoutErrorObserver.disconnect();
+					container.addEventListener( 'checkout-complete', disconnect );
+					container.addEventListener( 'checkout-cancel', disconnect );
+					window.addEventListener( 'beforeunload', disconnect );
+				}
 			}
 			init();
 		}