diff --git a/core-libs/assets/src/translations/en/user.json b/core-libs/assets/src/translations/en/user.json
index b430c32e8a6..663f2fe4abf 100644
--- a/core-libs/assets/src/translations/en/user.json
+++ b/core-libs/assets/src/translations/en/user.json
@@ -10,6 +10,7 @@
       "title": "This website uses cookies",
       "description": "We use cookies/browser's storage to personalize the content and improve user experience.",
       "allowAll": "Allow All",
+      "rejectOptionalStorage": "Reject Optional Storage",
       "viewDetails": "View Details",
       "consentManagement": "Consent Management"
     }
diff --git a/core-libs/core/src/site-theme/services/site-theme-persistence.service.ts b/core-libs/core/src/site-theme/services/site-theme-persistence.service.ts
index d809b02e635..012f0c0668f 100644
--- a/core-libs/core/src/site-theme/services/site-theme-persistence.service.ts
+++ b/core-libs/core/src/site-theme/services/site-theme-persistence.service.ts
@@ -28,6 +28,7 @@ export class SiteThemePersistenceService {
       key: SITE_THEME_ID,
       state$: this.siteThemeService.getActive(),
       onRead: (state) => this.onRead(state),
+      storageCategory: 'optional',
     });
     return this.initialized$;
   }
diff --git a/core-libs/core/src/state/event/cookie-consent-changed.event.ts b/core-libs/core/src/state/event/cookie-consent-changed.event.ts
new file mode 100644
index 00000000000..b4c0389a929
--- /dev/null
+++ b/core-libs/core/src/state/event/cookie-consent-changed.event.ts
@@ -0,0 +1,19 @@
+/*
+ * SPDX-FileCopyrightText: 2026 SAP Spartacus team <spartacus-team@sap.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { CxEvent } from '../../event/cx-event';
+
+/**
+ * Fired when the user accepts or rejects optional browser storage (cookies,
+ * localStorage, sessionStorage). Customizations can subscribe via
+ * EventService.get(CookieConsentChangedEvent) to clear their own optional
+ * storage entries.
+ */
+export class CookieConsentChangedEvent extends CxEvent {
+  static readonly type = 'CookieConsentChangedEvent';
+  /** true = user accepted optional cookies/storage; false = user rejected */
+  accepted: boolean;
+}
diff --git a/core-libs/core/src/state/event/index.ts b/core-libs/core/src/state/event/index.ts
index 76044da39cc..dbfbfb8d048 100644
--- a/core-libs/core/src/state/event/index.ts
+++ b/core-libs/core/src/state/event/index.ts
@@ -5,4 +5,5 @@
  */
 
 export * from './action-to-event-mapping';
+export * from './cookie-consent-changed.event';
 export * from './state-event.service';
diff --git a/core-libs/core/src/state/index.ts b/core-libs/core/src/state/index.ts
index 8d63f4ae743..2f89d50120f 100644
--- a/core-libs/core/src/state/index.ts
+++ b/core-libs/core/src/state/index.ts
@@ -6,6 +6,7 @@
 
 export * from './config/state-config';
 export * from './event/index';
+export * from './services/cookie-consent.service';
 export * from './services/state-persistence.service';
 export * from './state.module';
 export * from './utils/index';
diff --git a/core-libs/core/src/state/services/cookie-consent.service.ts b/core-libs/core/src/state/services/cookie-consent.service.ts
new file mode 100644
index 00000000000..694269f9a6d
--- /dev/null
+++ b/core-libs/core/src/state/services/cookie-consent.service.ts
@@ -0,0 +1,65 @@
+/*
+ * SPDX-FileCopyrightText: 2026 SAP Spartacus team <spartacus-team@sap.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { inject, Injectable } from '@angular/core';
+import { BehaviorSubject, Observable } from 'rxjs';
+import { distinctUntilChanged } from 'rxjs/operators';
+import { EventService } from '../../event/event.service';
+import { WindowRef } from '../../window/window-ref';
+import { CookieConsentChangedEvent } from '../event/cookie-consent-changed.event';
+
+/**
+ * Manages the user's optional cookie/browser-storage consent.
+ *
+ * When the user rejects optional cookies, a CookieConsentChangedEvent is
+ * dispatched so that state-persistence features and customizations can stop
+ * writing to optional storage keys.
+ *
+ * The consent decision is persisted under a dedicated non-rejectable key
+ * (`spartacus⚿cookieConsent`) so it survives page refreshes.
+ * Default is accepted (true) for backward compatibility.
+ */
+@Injectable({ providedIn: 'root' })
+export class CookieConsentService {
+  protected winRef = inject(WindowRef);
+  protected eventService = inject(EventService);
+
+  private readonly CONSENT_KEY = 'spartacus⚿cookieConsent';
+
+  private accepted$ = new BehaviorSubject<boolean>(this.readPersistedConsent());
+
+  isOptionalCookiesAccepted(): Observable<boolean> {
+    return this.accepted$.asObservable().pipe(distinctUntilChanged());
+  }
+
+  rejectOptionalCookies(): void {
+    this.setConsent(false);
+  }
+
+  acceptOptionalCookies(): void {
+    this.setConsent(true);
+  }
+
+  private setConsent(accepted: boolean): void {
+    this.winRef.localStorage?.setItem(
+      this.CONSENT_KEY,
+      JSON.stringify({ accepted })
+    );
+    this.accepted$.next(accepted);
+    const event = new CookieConsentChangedEvent();
+    event.accepted = accepted;
+    this.eventService.dispatch(event);
+  }
+
+  private readPersistedConsent(): boolean {
+    try {
+      const raw = this.winRef.localStorage?.getItem(this.CONSENT_KEY);
+      return raw ? (JSON.parse(raw).accepted ?? true) : true;
+    } catch {
+      return true;
+    }
+  }
+}
diff --git a/core-libs/core/src/state/services/state-persistence.service.ts b/core-libs/core/src/state/services/state-persistence.service.ts
index dee99360f86..82a85472724 100644
--- a/core-libs/core/src/state/services/state-persistence.service.ts
+++ b/core-libs/core/src/state/services/state-persistence.service.ts
@@ -4,9 +4,9 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import { Injectable } from '@angular/core';
-import { Observable, of, Subscription } from 'rxjs';
-import { map, tap, withLatestFrom } from 'rxjs/operators';
+import { inject, Injectable } from '@angular/core';
+import { EMPTY, Observable, of, Subscription } from 'rxjs';
+import { map, switchMap, take, tap, withLatestFrom } from 'rxjs/operators';
 import { StorageSyncType } from '../../state/config/state-config';
 import { WindowRef } from '../../window/window-ref';
 import {
@@ -14,6 +14,7 @@ import {
   persistToStorage,
   readFromStorage,
 } from '../utils/browser-storage';
+import { CookieConsentService } from './cookie-consent.service';
 
 @Injectable({
   providedIn: 'root',
@@ -21,6 +22,8 @@ import {
 export class StatePersistenceService {
   constructor(protected winRef: WindowRef) {}
 
+  private storageConsentService = inject(CookieConsentService);
+
   /**
    * Helper to synchronize state to more persistent storage (localStorage, sessionStorage).
    * It is context aware, so you can keep different state for te same feature based on specified context.
@@ -49,12 +52,15 @@ export class StatePersistenceService {
     onRead = () => {
       // Intentional empty arrow function
     },
+    storageCategory,
   }: {
     key: string;
     state$: Observable<T>;
     context$?: Observable<string | Array<string>>;
     storageType?: StorageSyncType;
     onRead?: (stateFromStorage: T | undefined) => void;
+    /** Mark as 'optional' to gate writes behind CookieConsentService. */
+    storageCategory?: 'required' | 'optional';
   }): Subscription {
     const storage = getStorage(storageType, this.winRef);
 
@@ -78,8 +84,26 @@ export class StatePersistenceService {
     );
 
     if (storage) {
+      const write$ =
+        storageCategory === 'optional'
+          ? this.storageConsentService.isOptionalCookiesAccepted().pipe(
+              switchMap((accepted) => {
+                if (!accepted) {
+                  return context$.pipe(
+                    take(1),
+                    tap((ctx) =>
+                      storage.removeItem(this.generateKeyWithContext(ctx, key))
+                    ),
+                    switchMap(() => EMPTY)
+                  );
+                }
+                return state$.pipe(withLatestFrom(context$));
+              })
+            )
+          : state$.pipe(withLatestFrom(context$));
+
       subscriptions.add(
-        state$.pipe(withLatestFrom(context$)).subscribe(([state, context]) => {
+        write$.subscribe(([state, context]) => {
           persistToStorage(
             this.generateKeyWithContext(context, key),
             state,
diff --git a/core-libs/storefront/cms-components/anonymous-consent-management/banner/anonymous-consent-management-banner.component.html b/core-libs/storefront/cms-components/anonymous-consent-management/banner/anonymous-consent-management-banner.component.html
index 2aea8e35acc..0b4698fac85 100644
--- a/core-libs/storefront/cms-components/anonymous-consent-management/banner/anonymous-consent-management-banner.component.html
+++ b/core-libs/storefront/cms-components/anonymous-consent-management/banner/anonymous-consent-management-banner.component.html
@@ -18,6 +18,9 @@
           <button class="btn btn-secondary" (click)="viewDetails()">
             {{ 'anonymousConsents.banner.consentManagement' | cxTranslate }}
           </button>
+          <button class="btn btn-secondary" (click)="rejectOptionalStorage()">
+            {{ 'anonymousConsents.banner.rejectOptionalStorage' | cxTranslate }}
+          </button>
           <button class="btn btn-primary" (click)="allowAll()">
             {{ 'anonymousConsents.banner.allowAll' | cxTranslate }}
           </button>
diff --git a/core-libs/storefront/cms-components/anonymous-consent-management/banner/anonymous-consent-management-banner.component.ts b/core-libs/storefront/cms-components/anonymous-consent-management/banner/anonymous-consent-management-banner.component.ts
index b1ef8496bde..635472bf844 100644
--- a/core-libs/storefront/cms-components/anonymous-consent-management/banner/anonymous-consent-management-banner.component.ts
+++ b/core-libs/storefront/cms-components/anonymous-consent-management/banner/anonymous-consent-management-banner.component.ts
@@ -6,7 +6,11 @@
 
 import { AsyncPipe, NgClass, NgIf } from '@angular/common';
 import { Component, OnDestroy, ViewContainerRef } from '@angular/core';
-import { AnonymousConsentsService, TranslatePipe } from '@spartacus/core';
+import {
+  AnonymousConsentsService,
+  CookieConsentService,
+  TranslatePipe,
+} from '@spartacus/core';
 import { Observable, Subscription } from 'rxjs';
 import { tap } from 'rxjs/operators';
 import { LAUNCH_CALLER } from '../../../layout/launch-dialog/config/launch-config';
@@ -25,6 +29,7 @@ export class AnonymousConsentManagementBannerComponent implements OnDestroy {
 
   constructor(
     protected anonymousConsentsService: AnonymousConsentsService,
+    protected storageConsentService: CookieConsentService,
     protected vcr: ViewContainerRef,
     protected launchDialogService: LaunchDialogService
   ) {}
@@ -42,6 +47,7 @@ export class AnonymousConsentManagementBannerComponent implements OnDestroy {
   }
 
   allowAll(): void {
+    this.storageConsentService.acceptOptionalCookies();
     this.subscriptions.add(
       this.anonymousConsentsService
         .giveAllConsents()
@@ -50,6 +56,11 @@ export class AnonymousConsentManagementBannerComponent implements OnDestroy {
     );
   }
 
+  rejectOptionalStorage(): void {
+    this.storageConsentService.rejectOptionalCookies();
+    this.hideBanner();
+  }
+
   hideBanner(): void {
     this.anonymousConsentsService.toggleBannerDismissed(true);
   }