No, that's not true - you go on paying them until you reach retirement age (which is getting later under the latest legislation). You have to apply for an Age Exemption Certificate about six months before you reach the appropriate age, this is sent to you and then you give it to your employer - this is their authority NOT to deduct NI from your pay. Even though they know you may qualify through age, they have to deduct it until they have your AEC on file.