Total cost is not the only question
The cheapest offer in total dollars often has the highest monthly payment, because it is shorter. A business whose constraint is cash flow may rationally take the more expensive loan with the lower payment - but it should do so knowing the price, which is what this calculates.
What is not modelled here
Prepayment penalties, covenants, collateral requirements, personal guarantees, and the cost of a blanket lien on your assets. Those frequently matter more than a two-point rate difference and none of them appear in an APR.
Questions
- Should I always take the lower APR?
- Usually, but not always. Compare the monthly burden and the non-price terms too - a covenant that trips on one bad quarter can cost far more than a couple of points.