diff --git a/.changeset/good-eels-drive.md b/.changeset/good-eels-drive.md
new file mode 100644
index 0000000000..c90a1263ec
--- /dev/null
+++ b/.changeset/good-eels-drive.md
@@ -0,0 +1,5 @@
+---
+'@backstage/core-components': patch
+---
+
+It is possible to define a custom error element to be shown when sign in fails
diff --git a/packages/core-components/report.api.md b/packages/core-components/report.api.md
index 24c835f638..7ffb430c7f 100644
--- a/packages/core-components/report.api.md
+++ b/packages/core-components/report.api.md
@@ -15,6 +15,7 @@ import { CardHeaderProps } from '@material-ui/core/CardHeader';
 import { Column } from '@material-table/core';
 import { ComponentClass } from 'react';
 import { ComponentProps } from 'react';
+import { ComponentType } from 'react';
 import { default as CSS_2 } from 'csstype';
 import { CSSProperties } from 'react';
 import { ElementType } from 'react';
@@ -876,6 +877,9 @@ export const ProxiedSignInPage: (
 export type ProxiedSignInPageProps = SignInPageProps & {
   provider: string;
   headers?: HeadersInit | (() => HeadersInit) | (() => Promise<HeadersInit>);
+  ErrorComponent?: ComponentType<{
+    error?: Error;
+  }>;
 };
 
 // Warning: (ae-missing-release-tag) "ResponseErrorPanel" is part of the package's API, but it is missing a release tag (@alpha, @beta, @public, or @internal)
@@ -1748,7 +1752,7 @@ export type WarningPanelClassKey =
 // src/layout/Sidebar/config.d.ts:8:1 - (ae-undocumented) Missing documentation for "SubmenuOptions".
 // src/layout/Sidebar/config.d.ts:12:22 - (ae-undocumented) Missing documentation for "sidebarConfig".
 // src/layout/Sidebar/config.d.ts:52:22 - (ae-undocumented) Missing documentation for "SIDEBAR_INTRO_LOCAL_STORAGE".
-// src/layout/SignInPage/SignInPage.d.ts:17:1 - (ae-undocumented) Missing documentation for "SignInPage".
+// src/layout/SignInPage/SignInPage.d.ts:26:1 - (ae-undocumented) Missing documentation for "SignInPage".
 // src/layout/SignInPage/customProvider.d.ts:3:1 - (ae-undocumented) Missing documentation for "CustomProviderClassKey".
 // src/layout/SignInPage/styles.d.ts:2:1 - (ae-undocumented) Missing documentation for "SignInPageClassKey".
 // src/layout/SignInPage/types.d.ts:3:1 - (ae-undocumented) Missing documentation for "SignInProviderConfig".
diff --git a/packages/core-components/src/layout/ProxiedSignInPage/ProxiedSignInPage.test.tsx b/packages/core-components/src/layout/ProxiedSignInPage/ProxiedSignInPage.test.tsx
index ad7e650d24..d0cfbbbe31 100644
--- a/packages/core-components/src/layout/ProxiedSignInPage/ProxiedSignInPage.test.tsx
+++ b/packages/core-components/src/layout/ProxiedSignInPage/ProxiedSignInPage.test.tsx
@@ -19,9 +19,9 @@ import { render, screen } from '@testing-library/react';
 import { rest } from 'msw';
 import { setupServer } from 'msw/node';
 import {
-  TestApiProvider,
   mockApis,
   registerMswTestHooks,
+  TestApiProvider,
   wrapInTestApp,
 } from '@backstage/test-utils';
 import { ProxiedSignInPage } from './ProxiedSignInPage';
@@ -99,4 +99,58 @@ describe('ProxiedSignInPage', () => {
       screen.findByText('Request failed with 401 Unauthorized'),
     ).resolves.toBeInTheDocument();
   });
+
+  it('should allow custom error component', async () => {
+    const ErrorComponent = ({ error }: { error?: Error }) => (
+      <>
+        <h1>Failed to authenticate</h1>
+        <div>{error?.message}</div>
+      </>
+    );
+
+    const CustomSubject = wrapInTestApp(<div>authenticated</div>, {
+      components: {
+        SignInPage: props => (
+          <TestApiProvider
+            apis={[
+              [
+                discoveryApiRef,
+                {
+                  getBaseUrl: async () => 'http://example.com/api/auth',
+                },
+              ],
+            ]}
+          >
+            <ProxiedSignInPage
+              {...props}
+              provider="test"
+              ErrorComponent={ErrorComponent}
+            />
+          </TestApiProvider>
+        ),
+      },
+    });
+
+    worker.use(
+      rest.get('http://example.com/api/auth/test/refresh', (_, res, ctx) =>
+        res(
+          ctx.status(401),
+          ctx.set('Content-Type', 'application/json'),
+          ctx.json({
+            error: { name: 'Error', message: 'not-displayed' },
+          }),
+        ),
+      ),
+    );
+
+    render(CustomSubject);
+
+    await expect(
+      screen.findByText('Failed to authenticate'),
+    ).resolves.toBeInTheDocument();
+
+    await expect(
+      screen.findByText('Request failed with 401 Unauthorized'),
+    ).resolves.toBeInTheDocument();
+  });
 });
diff --git a/packages/core-components/src/layout/ProxiedSignInPage/ProxiedSignInPage.tsx b/packages/core-components/src/layout/ProxiedSignInPage/ProxiedSignInPage.tsx
index df0d256312..01519ce0b3 100644
--- a/packages/core-components/src/layout/ProxiedSignInPage/ProxiedSignInPage.tsx
+++ b/packages/core-components/src/layout/ProxiedSignInPage/ProxiedSignInPage.tsx
@@ -19,7 +19,7 @@ import {
   SignInPageProps,
   useApi,
 } from '@backstage/core-plugin-api';
-import React from 'react';
+import React, { ComponentType } from 'react';
 import { useAsync, useMountEffect } from '@react-hookz/web';
 import { ErrorPanel } from '../../components/ErrorPanel';
 import { Progress } from '../../components/Progress';
@@ -44,6 +44,12 @@ export type ProxiedSignInPageProps = SignInPageProps & {
    * underlying provider
    */
   headers?: HeadersInit | (() => HeadersInit) | (() => Promise<HeadersInit>);
+
+  /**
+   * Error component to be rendered instead of the default error panel in case
+   * sign in fails.
+   */
+  ErrorComponent?: ComponentType<{ error?: Error }>;
 };
 
 /**
@@ -82,7 +88,11 @@ export const ProxiedSignInPage = (props: ProxiedSignInPageProps) => {
   if (status === 'loading') {
     return <Progress />;
   } else if (error) {
-    return <ErrorPanel title={t('proxiedSignInPage.title')} error={error} />;
+    return props.ErrorComponent ? (
+      <props.ErrorComponent error={error} />
+    ) : (
+      <ErrorPanel title={t('proxiedSignInPage.title')} error={error} />
+    );
   }
 
   return null;
diff --git a/packages/core-components/src/layout/SignInPage/SignInPage.tsx b/packages/core-components/src/layout/SignInPage/SignInPage.tsx
index fb8f804d5e..3dcccb50df 100644
--- a/packages/core-components/src/layout/SignInPage/SignInPage.tsx
+++ b/packages/core-components/src/layout/SignInPage/SignInPage.tsx
@@ -24,7 +24,7 @@ import { UserIdentity } from './UserIdentity';
 import Button from '@material-ui/core/Button';
 import Grid from '@material-ui/core/Grid';
 import Typography from '@material-ui/core/Typography';
-import React, { ReactNode, useState } from 'react';
+import React, { ComponentType, ReactNode, useState } from 'react';
 import { useMountEffect } from '@react-hookz/web';
 import { Progress } from '../../components/Progress';
 import { Content } from '../Content/Content';
@@ -38,14 +38,22 @@ import { IdentityProviders, SignInProviderConfig } from './types';
 import { coreComponentsTranslationRef } from '../../translation';
 import { useTranslationRef } from '@backstage/core-plugin-api/alpha';
 
-type MultiSignInPageProps = SignInPageProps & {
+type CommonSignInPageProps = SignInPageProps & {
+  /**
+   * Error component to be rendered instead of the default error panel in case
+   * sign in fails.
+   */
+  ErrorComponent?: ComponentType<{ error?: Error }>;
+};
+
+type MultiSignInPageProps = CommonSignInPageProps & {
   providers: IdentityProviders;
   title?: string;
   titleComponent?: ReactNode;
   align?: 'center' | 'left';
 };
 
-type SingleSignInPageProps = SignInPageProps & {
+type SingleSignInPageProps = CommonSignInPageProps & {
   provider: SignInProviderConfig;
   auto?: boolean;
 };
@@ -101,6 +109,7 @@ export const SingleSignInPage = ({
   provider,
   auto,
   onSignInSuccess,
+  ErrorComponent,
 }: SingleSignInPageProps) => {
   const classes = useStyles();
   const authApi = useApi(provider.apiRef);
@@ -190,11 +199,15 @@ export const SingleSignInPage = ({
               }
             >
               <Typography variant="body1">{provider.message}</Typography>
-              {error && error.name !== 'PopupRejectedError' && (
-                <Typography variant="body1" color="error">
-                  {error.message}
-                </Typography>
-              )}
+              {error &&
+                error.name !== 'PopupRejectedError' &&
+                (ErrorComponent ? (
+                  <ErrorComponent error={error} />
+                ) : (
+                  <Typography variant="body1" color="error">
+                    {error.message}
+                  </Typography>
+                ))}
             </InfoCard>
           </GridItem>
         </Grid>