diff --git a/apps/theming/lib/Capabilities.php b/apps/theming/lib/Capabilities.php
index 9d4847f58b0ef..c1f14b6001826 100644
--- a/apps/theming/lib/Capabilities.php
+++ b/apps/theming/lib/Capabilities.php
@@ -8,6 +8,7 @@
 namespace OCA\Theming;
 
 use OCA\Theming\AppInfo\Application;
+use OCA\Theming\Listener\BeforePreferenceListener;
 use OCA\Theming\Service\BackgroundService;
 use OCA\Theming\Service\ThemesService;
 use OCP\Capabilities\IPublicCapability;
@@ -65,6 +66,7 @@ public function __construct(
 	 *         inverted: bool,
 	 *         cacheBuster: string,
 	 *         enabledThemes: list<string>,
+	 *         toastTimeout: int,
 	 *     },
 	 * }
 	 */
@@ -129,7 +131,26 @@ public function getCapabilities() {
 				'inverted' => $this->util->invertTextColor($color),
 				'cacheBuster' => $this->util->getCacheBuster(),
 				'enabledThemes' => $this->themesService->getEnabledThemes(),
+				'toastTimeout' => $this->getToastTimeout($user),
 			],
 		];
 	}
+
+	/**
+	 * Resolve the effective toast timeout for the given user.
+	 *
+	 * Uses the config lexicon default and falls back when an invalid value is stored.
+	 */
+	private function getToastTimeout(?IUser $user): int {
+		if ($user instanceof IUser) {
+			// Config lexicon provides the default when the preference is unset.
+			$value = $this->userConfig->getValueInt($user->getUID(), Application::APP_ID, ConfigLexicon::TOAST_TIMEOUT);
+			if ($value === ConfigLexicon::TOAST_TIMEOUT_DEFAULT
+				|| in_array($value, BeforePreferenceListener::TOAST_TIMEOUT_VALUES, true)) {
+				return $value;
+			}
+		}
+
+		return ConfigLexicon::TOAST_TIMEOUT_DEFAULT;
+	}
 }
diff --git a/apps/theming/lib/ConfigLexicon.php b/apps/theming/lib/ConfigLexicon.php
index 6c91d7dfad30b..f9b03b018aff2 100644
--- a/apps/theming/lib/ConfigLexicon.php
+++ b/apps/theming/lib/ConfigLexicon.php
@@ -24,6 +24,8 @@ class ConfigLexicon implements ILexicon {
 	/** The cache buster index */
 	public const CACHE_BUSTER = 'cachebuster';
 	public const USER_THEMING_DISABLED = 'disable-user-theming';
+	public const TOAST_TIMEOUT = 'toast_timeout';
+	public const TOAST_TIMEOUT_DEFAULT = 7000;
 
 	/** Name of the software running on this instance (usually "Nextcloud") */
 	public const PRODUCT_NAME = 'productName';
@@ -114,6 +116,13 @@ public function getAppConfigs(): array {
 
 	#[\Override]
 	public function getUserConfigs(): array {
-		return [];
+		return [
+			new Entry(
+				self::TOAST_TIMEOUT,
+				ValueType::INT,
+				defaultRaw: self::TOAST_TIMEOUT_DEFAULT,
+				definition: 'How long toast notifications remain visible in milliseconds.',
+			),
+		];
 	}
 }
diff --git a/apps/theming/lib/Listener/BeforePreferenceListener.php b/apps/theming/lib/Listener/BeforePreferenceListener.php
index d823df1ab33c2..d964a7f884b05 100644
--- a/apps/theming/lib/Listener/BeforePreferenceListener.php
+++ b/apps/theming/lib/Listener/BeforePreferenceListener.php
@@ -10,6 +10,7 @@
 namespace OCA\Theming\Listener;
 
 use OCA\Theming\AppInfo\Application;
+use OCA\Theming\ConfigLexicon;
 use OCP\App\IAppManager;
 use OCP\Config\BeforePreferenceDeletedEvent;
 use OCP\Config\BeforePreferenceSetEvent;
@@ -22,7 +23,15 @@ class BeforePreferenceListener implements IEventListener {
 	/**
 	 * @var string[]
 	 */
-	private const ALLOWED_KEYS = ['force_enable_blur_filter', 'shortcuts_disabled', 'primary_color'];
+	private const ALLOWED_KEYS = ['force_enable_blur_filter', 'shortcuts_disabled', 'primary_color', ConfigLexicon::TOAST_TIMEOUT];
+
+	/**
+	 * Allowed toast timeout values in milliseconds.
+	 * Default (7000) is represented by deleting the preference.
+	 *
+	 * @var int[]
+	 */
+	public const array TOAST_TIMEOUT_VALUES = [15000, 30000, -1];
 
 	public function __construct(
 		private IAppManager $appManager,
@@ -62,6 +71,10 @@ private function handleThemingValues(BeforePreferenceSetEvent|BeforePreferenceDe
 				case 'primary_color':
 					$event->setValid(preg_match('/^\#([0-9a-f]{3}|[0-9a-f]{6})$/i', $event->getConfigValue()) === 1);
 					break;
+				case ConfigLexicon::TOAST_TIMEOUT:
+					$value = filter_var($event->getConfigValue(), FILTER_VALIDATE_INT);
+					$event->setValid($value !== false && in_array($value, self::TOAST_TIMEOUT_VALUES, true));
+					break;
 				default:
 					$event->setValid(false);
 			}
diff --git a/apps/theming/openapi.json b/apps/theming/openapi.json
index beaf92477cda4..81f8760fcc42b 100644
--- a/apps/theming/openapi.json
+++ b/apps/theming/openapi.json
@@ -102,7 +102,8 @@
                             "defaultBackgroundColor",
                             "inverted",
                             "cacheBuster",
-                            "enabledThemes"
+                            "enabledThemes",
+                            "toastTimeout"
                         ],
                         "properties": {
                             "name": {
@@ -182,6 +183,10 @@
                                 "items": {
                                     "type": "string"
                                 }
+                            },
+                            "toastTimeout": {
+                                "type": "integer",
+                                "description": "How long toast notifications remain visible in milliseconds. Use -1 to keep them until dismissed."
                             }
                         }
                     }
diff --git a/apps/theming/src/components/UserSectionToastTimeout.vue b/apps/theming/src/components/UserSectionToastTimeout.vue
new file mode 100644
index 0000000000000..d7b1206c63ae3
--- /dev/null
+++ b/apps/theming/src/components/UserSectionToastTimeout.vue
@@ -0,0 +1,139 @@
+<!--
+  - SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
+<script setup lang="ts">
+import axios from '@nextcloud/axios'
+import { getCapabilities } from '@nextcloud/capabilities'
+import {
+	showError,
+	TOAST_DEFAULT_TIMEOUT,
+	TOAST_PERMANENT_TIMEOUT,
+} from '@nextcloud/dialogs'
+import { t } from '@nextcloud/l10n'
+import { generateOcsUrl } from '@nextcloud/router'
+import { computed, ref } from 'vue'
+import NcCheckboxRadioSwitch from '@nextcloud/vue/components/NcCheckboxRadioSwitch'
+import NcSettingsSection from '@nextcloud/vue/components/NcSettingsSection'
+import { logger } from '../utils/logger.ts'
+
+const TOAST_TIMEOUT_15S = 15_000
+const TOAST_TIMEOUT_30S = 30_000
+
+type ThemingCapabilities = {
+	theming?: {
+		toastTimeout?: number
+	}
+}
+
+/**
+ * Read the effective toast timeout from theming capabilities.
+ */
+function readToastTimeout(): number {
+	const timeout = (getCapabilities() as ThemingCapabilities)?.theming?.toastTimeout
+	if (typeof timeout === 'number' && (timeout === TOAST_PERMANENT_TIMEOUT || timeout > 0)) {
+		return timeout
+	}
+	return TOAST_DEFAULT_TIMEOUT
+}
+
+/**
+ * Update the in-memory theming capability so subsequent toasts use the new timeout
+ * without requiring a page reload.
+ *
+ * @param timeout - Timeout in milliseconds
+ */
+function applyToastTimeoutCapability(timeout: number): void {
+	const capabilities = getCapabilities() as ThemingCapabilities
+	if (capabilities.theming) {
+		capabilities.theming.toastTimeout = timeout
+	}
+}
+
+const toastTimeout = ref(readToastTimeout())
+
+const options = computed(() => [
+	{
+		value: TOAST_DEFAULT_TIMEOUT,
+		label: t('theming', 'Default ({time} seconds)', { time: TOAST_DEFAULT_TIMEOUT / 1000 }),
+	},
+	{
+		value: TOAST_TIMEOUT_15S,
+		label: t('theming', '15 seconds'),
+	},
+	{
+		value: TOAST_TIMEOUT_30S,
+		label: t('theming', '30 seconds'),
+	},
+	{
+		value: TOAST_PERMANENT_TIMEOUT,
+		label: t('theming', 'Never dismiss'),
+	},
+])
+
+/**
+ * Persist and apply the selected toast timeout
+ *
+ * @param value - Selected timeout preference value
+ */
+async function updateToastTimeout(value: string | number | boolean) {
+	const nextValue = Number(value)
+	const previous = toastTimeout.value
+	toastTimeout.value = nextValue
+	applyToastTimeoutCapability(nextValue)
+
+	const url = generateOcsUrl('apps/provisioning_api/api/v1/config/users/{appId}/{configKey}', {
+		appId: 'theming',
+		configKey: 'toast_timeout',
+	})
+
+	try {
+		if (nextValue === TOAST_DEFAULT_TIMEOUT) {
+			await axios.delete(url)
+		} else {
+			await axios.post(url, {
+				configValue: String(nextValue),
+			})
+		}
+	} catch (error) {
+		toastTimeout.value = previous
+		applyToastTimeoutCapability(previous)
+		logger.error('Could not update toast timeout', { error })
+		showError(t('theming', 'Could not update toast timeout'))
+	}
+}
+</script>
+
+<template>
+	<NcSettingsSection
+		:name="t('theming', 'Toast notifications')"
+		:description="t('theming', 'Set how long toast messages stay visible. Choose a longer duration if you need more time to read them.')">
+		<fieldset class="toast-timeout">
+			<legend class="hidden-visually">
+				{{ t('theming', 'Toast timeout') }}
+			</legend>
+			<NcCheckboxRadioSwitch
+				v-for="option in options"
+				:key="option.value"
+				:modelValue="toastTimeout"
+				type="radio"
+				name="toast_timeout"
+				:value="option.value"
+				@update:modelValue="updateToastTimeout">
+				{{ option.label }}
+			</NcCheckboxRadioSwitch>
+		</fieldset>
+	</NcSettingsSection>
+</template>
+
+<style scoped lang="scss">
+.toast-timeout {
+	display: flex;
+	flex-direction: column;
+	gap: 4px;
+	border: 0;
+	margin: 0;
+	padding: 0;
+}
+</style>
diff --git a/apps/theming/src/views/UserTheming.vue b/apps/theming/src/views/UserTheming.vue
index 6ecee83202e7a..7bb7128547e0d 100644
--- a/apps/theming/src/views/UserTheming.vue
+++ b/apps/theming/src/views/UserTheming.vue
@@ -49,6 +49,7 @@
 	</template>
 
 	<UserSectionHotkeys />
+	<UserSectionToastTimeout />
 	<UserSectionAppMenu />
 </template>
 
@@ -68,6 +69,7 @@ import UserSectionAppMenu from '../components/UserSectionAppMenu.vue'
 import UserSectionBackground from '../components/UserSectionBackground.vue'
 import UserSectionHotkeys from '../components/UserSectionHotkeys.vue'
 import UserSectionPrimaryColor from '../components/UserSectionPrimaryColor.vue'
+import UserSectionToastTimeout from '../components/UserSectionToastTimeout.vue'
 import { refreshStyles } from '../utils/refreshStyles.js'
 
 const isUserThemingDisabled = loadState('theming', 'isUserThemingDisabled')
diff --git a/apps/theming/tests/CapabilitiesTest.php b/apps/theming/tests/CapabilitiesTest.php
index 6101a833f36af..fad548e7dd5aa 100644
--- a/apps/theming/tests/CapabilitiesTest.php
+++ b/apps/theming/tests/CapabilitiesTest.php
@@ -90,6 +90,7 @@ public static function dataGetCapabilities(): array {
 				'inverted' => true,
 				'cacheBuster' => 'v1',
 				'enabledThemes' => ['default'],
+				'toastTimeout' => 7000,
 			]],
 			['name1', 'url2', 'slogan3', '#01e4a0', '#ffffff', 'logo5', 'background6', '#fff', '#000', 'http://localhost/', false, '', '', '#0082c9', [
 				'name' => 'name1',
@@ -117,6 +118,7 @@ public static function dataGetCapabilities(): array {
 				'inverted' => false,
 				'cacheBuster' => 'v1',
 				'enabledThemes' => ['default'],
+				'toastTimeout' => 7000,
 			]],
 			['name1', 'url2', 'slogan3', '#000000', '#ffffff', 'logo5', 'backgroundColor', '#000000', '#ffffff', 'http://localhost/', true, '', '', '#0082c9', [
 				'name' => 'name1',
@@ -144,6 +146,7 @@ public static function dataGetCapabilities(): array {
 				'inverted' => false,
 				'cacheBuster' => 'v1',
 				'enabledThemes' => ['default'],
+				'toastTimeout' => 7000,
 			]],
 			['name1', 'url2', 'slogan3', '#000000', '#ffffff', 'logo5', 'backgroundColor', '#000000', '#ffffff', 'http://localhost/', false, '', '', '#0082c9', [
 				'name' => 'name1',
@@ -171,6 +174,7 @@ public static function dataGetCapabilities(): array {
 				'inverted' => false,
 				'cacheBuster' => 'v1',
 				'enabledThemes' => ['default'],
+				'toastTimeout' => 7000,
 			]],
 		];
 	}
@@ -339,5 +343,52 @@ public function testGetCapabilitiesWithUser(string $backgroundImage, bool $expec
 		// New fields are always present
 		$this->assertSame('v1', $theming['cacheBuster']);
 		$this->assertSame(['default'], $theming['enabledThemes']);
+		$this->assertSame(7000, $theming['toastTimeout']);
+	}
+
+	public static function dataGetCapabilitiesToastTimeout(): array {
+		return [
+			'default' => [7000, 7000],
+			'15 seconds' => [15000, 15000],
+			'30 seconds' => [30000, 30000],
+			'never dismiss' => [-1, -1],
+			'invalid falls back to default' => [1234, 7000],
+		];
+	}
+
+	#[\PHPUnit\Framework\Attributes\DataProvider(methodName: 'dataGetCapabilitiesToastTimeout')]
+	public function testGetCapabilitiesToastTimeout(int $storedTimeout, int $expectedTimeout): void {
+		$user = $this->createMock(IUser::class);
+		$user->method('getUID')->willReturn('user1');
+		$this->userSession->method('getUser')->willReturn($user);
+
+		$this->theming->method('getDefaultColorPrimary')->willReturn('#0082c9');
+		$this->theming->method('getColorPrimary')->willReturn('#0082c9');
+		$this->theming->method('getTextColorPrimary')->willReturn('#ffffff');
+		$this->theming->method('getName')->willReturn('Name');
+		$this->theming->method('getProductName')->willReturn('Name');
+		$this->theming->method('getBaseUrl')->willReturn('http://example.com/');
+		$this->theming->method('getImprintUrl')->willReturn('');
+		$this->theming->method('getPrivacyUrl')->willReturn('');
+		$this->theming->method('getSlogan')->willReturn('Slogan');
+		$this->theming->method('getColorBackground')->willReturn(BackgroundService::DEFAULT_COLOR);
+		$this->theming->method('getTextColorBackground')->willReturn('#ffffff');
+		$this->theming->method('getDefaultColorBackground')->willReturn('#0082c9');
+		$this->theming->method('getLogo')->willReturn('/logo');
+		$this->theming->method('getBackground')->willReturn('/background');
+
+		$this->appConfig->method('getValueString')->willReturn('');
+		$this->userConfig->method('getValueString')->willReturn(BackgroundService::BACKGROUND_DEFAULT);
+		$this->userConfig->method('getValueInt')->willReturn($storedTimeout);
+
+		$this->util->method('invertTextColor')->willReturn(false);
+		$this->util->method('elementColor')->willReturn('#0082c9');
+		$this->util->method('isBackgroundThemed')->willReturn(false);
+		$this->util->method('getCacheBuster')->willReturn('v1');
+		$this->themesService->method('getEnabledThemes')->willReturn(['default']);
+		$this->url->method('getAbsoluteURL')->willReturnCallback(fn (string $url) => 'http://localhost' . $url);
+
+		$result = $this->capabilities->getCapabilities();
+		$this->assertSame($expectedTimeout, $result['theming']['toastTimeout']);
 	}
 }