Q: Can a seller put a high interest rate on land contract when he has a letter from Egg company guaranteeing the payment

A: There are a few things that jump out at me from your question. The first is that you ask two things. One question is "can a seller put a high interest rate on a land contract" and the other is "is that fair...?" Those are two different questions, and the answer to one might be different than the answer to the other. The second thing that I notice is that you describe the rate as "high," but that leads to the question of what you consider to be high, and high compared to what?

On the legal side of this, there are some restrictions in Indiana on consumer loans, but what you describe here does not sound like a consumer loan. And, frankly, even if it were a consumer loan, the law would restrict the interest rate to a rate that you would probably still consider "high" (as much as 25%). You also say that the "seller" applied the high interest rate, and that this is a land contract. So, based on those words, it sounds like you are saying that the prior owner of the property (a private company) was both the seller and loaned you the money to buy it, and that the farm does not have a dwelling on it? From what you have said, and without knowing the interest rate or being sure about the assumptions above, the answer to "can" the seller set this particular interest rate is probably "yes."

But what about fairness? If you think that the rate is unfairly high, that probably means that you have the ability to get a lower interest rate than the rate you currently have. You will want to look at the terms of your current loan to see what it says about early payment. If you have other lenders lining up to give you a lower interest rate in light of the guarantee from the egg company, you might want to refinance with those lower rate lenders and prepay the current loan and move on.