Can my isp see my internet traffic while I'm using my own vpn on my home network

I have been told multiple times they wont be able to see anything, but that doesnt make any sense to me. If the server im using as a vpn is on my home network then why wouldn’t my isp be able to see it?

A self hosted VPN on your home network will not protect you from your home ISP. If your away from home your VPN will protect from other ISPs just not the one at home.

so, you are connecting a device on your own LAN onto a VPN within your own LAN?

The secured VPN connection in that case is totally within your own internal network, so any external traffic will be visible to your ISP.

You have not explained your setup well enough fir anyone to really help you. Where is the VPN server, where is the VPN client? Are they in the same network?

Yes. ISPs can be able to see your internet traffic, including encrypted data that you transmit while using a VPN (or any other type of tunneling software) from home. Some ISPs (such as Comcast) have gone so far as to publicly announce that they will start charging customers extra for using home VPNs.The main reason why ISPs can see your data, even when it’s encrypted, is that home internet networks make use of a built-in network router.

Most routers (including the one from your ISP) use Domain Name System (DNS) servers to translate an IP address into a domain name. So when you connect to a website through a VPN at home, your ISP’s DNS server will still know which website it was that you connected with and where the request came from. This way they’ll be able to charge you for the traffic if they decide to do so.

The idea of home networks (or small businesses with private network routers) using their own DNS servers is a very controversial topic. Some people argue that it’s a bad idea because it makes it impossible to do any kind of logging and filtering if the ISP decides to do so (you have to trust somebody, after all). Other people argue that you should use your own DNS servers because they’re more likely to be faster, more secure and more reliable.

In any case, I think it’s a good idea to use your own DNS server in any case, especially when using a VPN at home.Another reason why your ISP might be able to see some of your internet traffic throughout the years (especially while you’re not using a VPN) is that ISPs can make use of Deep Packet Inspection (DPI). DPI lets them go through all your data packets and find out who they’re from and where they’re going. They can use DPI to filter your traffic, but they can also use it to track you while you’re not using a VPN.

Thank you. Is there any way I can change that without paying for a vpn service?