For an unbundled plan I help with (TPA work, administration, and fund expense are all separate and you know what each costs vs bundled into the fund expenses). The new comparability pricing regardless of number of employees or asset size is:
$775 Minimum fee for 3 hours of work. $225 per hour above 3 hours.
For the 65 ish participants (around $7M in assets but it should not matter for this test), it has never cost more than the $775 minimum. There generally aren't many issues with this plan though.
As you can see from the previous answers, numbers can be provided for what a TPA should charge for a plan of your size. One of the aspects of answering a question like this is to try and put myself in your position and understand your circumstances so we can respond to what you're really asking. Sometimes a straight forward number is what you're looking for but sometimes it's something else. What I'm getting at here is that if you have a good adviser, he/she should be your partner when it comes to assessing plan fees and if they're reasonable for you. If you need to, ask your adviser for some different recommendations for TPA's if you need to shop the market and compare fees.
Regarding the costs there are several different avenues you can and should look into for a plan of your size. There are many things to consider, and several ways to go about how you can pay the fees. If you are interested in hearing more, I can point you in the direction of about 6 different providers that can assist you and I will help you understand the fees involved in all the plans. Feel free to contact me anytime at my office, 631-957-2317. I look forward to helping you Linda. I hope you have a great day.