diff --git a/README.md b/README.md
index 09487302d..3b994538a 100644
--- a/README.md
+++ b/README.md
@@ -66,6 +66,12 @@ There are several options that can be passed in as a second parameter, like the
 showError('This is an error shown without a timeout', { timeout: -1 })
 ```
 
+Ordinary toasts (success, error, warning, info, and bare messages) use the user-configured toast timeout
+from the theming capabilities (`theming.toastTimeout`) when available, and fall back to
+`TOAST_DEFAULT_TIMEOUT` (7 seconds) otherwise.
+
+Loading toasts stay permanent until hidden manually, and undo toasts keep their fixed undo duration.
+
 A full list of available options can be found in the [documentation](https://nextcloud-libraries.github.io/nextcloud-dialogs/).
 
 ### FilePicker
diff --git a/lib/toast.spec.ts b/lib/toast.spec.ts
new file mode 100644
index 000000000..a7af0f8d9
--- /dev/null
+++ b/lib/toast.spec.ts
@@ -0,0 +1,103 @@
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+import { afterEach, beforeEach, expect, test, vi } from 'vitest'
+import { showMessage, TOAST_DEFAULT_TIMEOUT, TOAST_PERMANENT_TIMEOUT, ToastType } from './toast.ts'
+
+const getCapabilities = vi.hoisted(() => vi.fn())
+
+vi.mock('@nextcloud/capabilities', () => ({
+	getCapabilities,
+}))
+
+vi.mock('toastify-js', () => ({
+	default: vi.fn((options: { duration?: number }) => ({
+		options,
+		showToast: vi.fn(),
+		hideToast: vi.fn(),
+	})),
+}))
+
+import Toastify from 'toastify-js'
+
+beforeEach(() => {
+	getCapabilities.mockReset()
+	vi.mocked(Toastify).mockClear()
+})
+
+afterEach(() => {
+	document.body.innerHTML = ''
+})
+
+test('uses default timeout when capabilities are missing', () => {
+	getCapabilities.mockImplementation(() => {
+		throw new Error('no capabilities')
+	})
+
+	showMessage('hello')
+
+	expect(Toastify).toHaveBeenCalledWith(expect.objectContaining({
+		duration: TOAST_DEFAULT_TIMEOUT,
+	}))
+})
+
+test('uses toastTimeout from theming capabilities', () => {
+	getCapabilities.mockReturnValue({
+		theming: {
+			toastTimeout: 15_000,
+		},
+	})
+
+	showMessage('hello')
+
+	expect(Toastify).toHaveBeenCalledWith(expect.objectContaining({
+		duration: 15_000,
+	}))
+})
+
+test('allows permanent timeout from capabilities', () => {
+	getCapabilities.mockReturnValue({
+		theming: {
+			toastTimeout: TOAST_PERMANENT_TIMEOUT,
+		},
+	})
+
+	showMessage('hello')
+
+	expect(Toastify).toHaveBeenCalledWith(expect.objectContaining({
+		duration: TOAST_PERMANENT_TIMEOUT,
+	}))
+})
+
+test('falls back for invalid capability values', () => {
+	getCapabilities.mockReturnValue({
+		theming: {
+			toastTimeout: 0,
+		},
+	})
+
+	showMessage('hello')
+
+	expect(Toastify).toHaveBeenCalledWith(expect.objectContaining({
+		duration: TOAST_DEFAULT_TIMEOUT,
+	}))
+})
+
+test('does not override loading toast duration', () => {
+	getCapabilities.mockReturnValue({
+		theming: {
+			toastTimeout: 30_000,
+		},
+	})
+
+	showMessage('loading', {
+		type: ToastType.LOADING,
+		timeout: TOAST_PERMANENT_TIMEOUT,
+	})
+
+	expect(Toastify).toHaveBeenCalledWith(expect.objectContaining({
+		duration: TOAST_PERMANENT_TIMEOUT,
+	}))
+})
diff --git a/lib/toast.ts b/lib/toast.ts
index fead2c23a..8112693ac 100644
--- a/lib/toast.ts
+++ b/lib/toast.ts
@@ -3,6 +3,7 @@
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
+import { getCapabilities } from '@nextcloud/capabilities'
 import Toastify from 'toastify-js'
 import LoaderSvg from '../styles/loader.svg?raw'
 import { t } from './utils/l10n.js'
@@ -41,6 +42,37 @@ export const TOAST_DEFAULT_TIMEOUT = 7000
 /** Timeout value to show a toast permanently */
 export const TOAST_PERMANENT_TIMEOUT = -1
 
+type ThemingCapabilities = {
+	theming?: {
+		toastTimeout?: number
+	}
+}
+
+/**
+ * Whether a timeout value is valid for ordinary toasts.
+ *
+ * @param timeout Timeout in milliseconds
+ */
+function isValidToastTimeout(timeout: number): boolean {
+	return timeout === TOAST_PERMANENT_TIMEOUT || timeout > 0
+}
+
+/**
+ * Resolve the user-configured toast timeout from theming capabilities.
+ * Falls back to {@link TOAST_DEFAULT_TIMEOUT} when unset or invalid.
+ */
+function getToastTimeout(): number {
+	try {
+		const timeout = (getCapabilities() as ThemingCapabilities)?.theming?.toastTimeout
+		if (typeof timeout === 'number' && isValidToastTimeout(timeout)) {
+			return timeout
+		}
+	} catch {
+		// Capabilities may be unavailable outside the browser (e.g. unit tests).
+	}
+	return TOAST_DEFAULT_TIMEOUT
+}
+
 /**
  * Type of a toast
  *
@@ -104,7 +136,7 @@ export interface ToastOptions {
  */
 export function showMessage(data: string | Node, options?: ToastOptions): Toast {
 	options = {
-		timeout: TOAST_DEFAULT_TIMEOUT,
+		timeout: getToastTimeout(),
 		isHTML: false,
 		type: undefined,
 		// An undefined selector defaults to the body element
@@ -115,6 +147,16 @@ export function showMessage(data: string | Node, options?: ToastOptions): Toast
 		...options,
 	}
 
+	// Accessibility preference overrides ordinary/app-specific timeouts.
+	// Loading and undo toasts keep their forced durations; permanent stays permanent.
+	if (
+		options.type !== ToastType.LOADING
+		&& options.type !== ToastType.UNDO
+		&& options.timeout !== TOAST_PERMANENT_TIMEOUT
+	) {
+		options.timeout = getToastTimeout()
+	}
+
 	if (typeof data === 'string' && !options.isHTML) {
 		// fime mae sure that text is extracted
 		const element = document.createElement('div')
diff --git a/package-lock.json b/package-lock.json
index 050e1495f..c3ffa0520 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,6 +13,7 @@
         "@nextcloud/auth": "^2.6.0",
         "@nextcloud/axios": "^2.6.0",
         "@nextcloud/browser-storage": "^0.5.0",
+        "@nextcloud/capabilities": "^1.2.1",
         "@nextcloud/event-bus": "^3.3.3",
         "@nextcloud/files": "^4.0.0",
         "@nextcloud/initial-state": "^3.0.0",
diff --git a/package.json b/package.json
index 85a4d7e98..8edf24287 100644
--- a/package.json
+++ b/package.json
@@ -51,6 +51,7 @@
     "@nextcloud/auth": "^2.6.0",
     "@nextcloud/axios": "^2.6.0",
     "@nextcloud/browser-storage": "^0.5.0",
+    "@nextcloud/capabilities": "^1.2.1",
     "@nextcloud/event-bus": "^3.3.3",
     "@nextcloud/files": "^4.0.0",
     "@nextcloud/initial-state": "^3.0.0",