I would recommend adding this Admin time in to your hourly or project rates. Most clients aren't going to be happy with an added admin/maint. fee. If it's built

I would recommend adding this Admin time in to your hourly or project rates. Most clients aren't going to be happy with an added admin/maint. fee. If it's built in to your rate it's easier for everyone to handle and you won't have them questioning your invoice for an extra 3 or 4 hours of time. Plus if it's built in you'll worry less about tracking time for emails. Keep it simple, you need email to stay in contact with clients/getting new work so just check it a few times per day especially if feel it's becoming a problem. Responding fast takes a little time, but will keep your clients happy. Another great option is to hire a VA to review your emails, respond when they can and forward you the important ones. Maybe setup a mail@ or support@ or project@ email for clients to use instead of your specific work email.