How long does cookie consent last?

You should renew cookie consent at least once a year (as per the ePrivacy Directive) or have periodic renewal as per the guidelines set out by your local data protection authority (DPA). For instance, the Irish DPC and the French CNIL recommends that consent should be re-obtained after no longer than six months. The GDPR does not specify a time limit for how long consent will last, therefore you should set a renewal period as per the guidelines of your respective DPA.