House edge of Insurance

Hello dear friends,
In some casinos on Blackjack tables they offer Insurance to all players and on some of them only to the players that don't have Blackjack in their hand (2 first player's cards).
I am wondering to know what is the share of the theoretical House edge of Blackjack played with 8 decks of offering Insurance to the players with Blackjack.
For example, the theoretical house edge of Blackjack in which the Insurance is offered only to the players without BJ is 0.44.
How the House edge grows when starting to offer Insurance also to the players with BJ?

I will be very grateful if you can answer me

Players with blackjack are generally offered "even money" which works out exactly the same as the insurance bet.

Quote: Statsbeginner

...I am wondering to know what is the share of the theoretical House edge of Blackjack played with 8 decks of offering Insurance to the players with Blackjack.
For example, the theoretical house edge of Blackjack in which the Insurance is offered only to the players without BJ is 0.44.
How the House edge grows when starting to offer Insurance also to the players with BJ?...

The 0.44% house edge assumes that the player is using perfect basic strategy. Because not taking insurance is correct basic strategy, the house edge would not change with the casino's offering insurance to players with blackjack.

However, a player, otherwise using basic strategy but always insuring his blackjacks, would see the house edge against him increase by 0.03% (to around 0.47%) in an eight-deck game.