I've been waiting all day for a response to your question. I guess everyone is waiting for someone to give some bad advice so they can all jump in. I'll bite. By jackpot I will assume that you are talking about an extra "take" from the pot to fund a bad beat jackpot. I'll give the methods used by a local casino that has been using it with success for a few years.
There is a separate drop box for the jackpot take-out. By that I mean separate from the rake. This makes it easy to separate, but is costly because of the additional boxes required. The method I suggest is (depending on your rake procedure) is to always take the rake first, even though more rake might follow. Let the players know that the jackpot dollar will be taken after the pot goes over $20. This can get a bit confusing to some dealers so I like to tell them to take the rake and don't take the jackpot if it leaves less than $20 in the pot. Example; The casino I'm talking about takes a three dollar rake chip out for the house as soon as the first betting round is complete...so $24 pot total, three for the house, one for the jackpot and $20 left in the pot.
Most higher limit players don't like the bad beat. They don't like anything being taken out of the pot (not even the rake
). If your cardroom spreads 7 card stud, or omaha, or any other games be sure to separate jackpots. It is easier to hit bigger hands in stud than hold'em so different jackpots, or different hand requirements will be needed to make things fair. You might want Aces full of eight's for hold'em and four of a kind for 7 card stud.
If the majority of your players are low limit players, they will probably like the addition of a bad beat jackpot. The higher limit players don't need to be included. Getting it started might require the house to guarantee a certain amount just to get it off the ground. The money can be recouped at a later date. I would suggest setting the jackpot up so you have a back-up so when the jackpot is hit, there is another in reserve. For each dollar taken, separate 60% 30% and 10% for example.
This should get some other suggestions started.