This is really more of a philosophical/partnership question than an accounting question. At my company and those of most of my clients, if all three partners are equally active in the business and make a similar salary, then usually business related expenses are paid the same for all. If these are more “perks” (country club memberships, car payments, etc.), then a decision has to be made as to who gets what, just like what salary gets paid to each partner.

Because no one owns a majority, you are going to have to come to some sort of agreement among the partners. Even if someone owned 51% though, you would probably still want to reach a consensus. When the 51% owner makes these types of decisions unilaterally, then it tends to undermine the spirit of the partnership. So the answer is, you guys need to decide what everyone can live with and go with that. I can tell you all day that the 50% partner should get a nicer car, but that’s not going to stop the other two partners from being unhappy if they don’t like that solution. So if you are the 50% partner looking for me to give you an answer you can show to partners and say “See, everyone else thinks I should get a better car,” I’m going to advise you that’s a really bad idea all the time, not just as it relates to this topic.

The last comment I’ll make is a little bigger picture. I’d suggest not instituting a lot of perks and running a lot of semi-personal expenses through the company. Profits will be distributed at the end of the year based on your sharing ratios. If one partner wants to join a country club, they can use their profits to do that. Expenses like that aren’t deductible for tax purposes anyway, so there’s no benefit to running them through the company. Make your business about business, and leave the other stuff for people to spend on their own.