Financing at zero percent vs cash discount. Let's take an example close to my last large tractor purchase and use round numbers. $100,000 for 5 years at zero percent or $99,000 cash. After delivery I had $100,000 cash vs $1,000 is I paid cash. I invested the difference and, over the past 5 years, I have averaged 9% return on my investment. Not great, but conservative portfolio. S my money went up but I did need to make payments. So to simplify the math and work from the midway point, $50,000. $50,000 at 9% annually is $4,500, or over 5 years $22,500. So over 5 years I have earned $22,500 gain on investment vs $90 interest per year or simplified $450 interest on the cash back. I am over $22,500 ahead having financed. Simplified, although I actually came out further ahead than that because although I averaged 9% on investment over 5 years, I actually made 12% and %15% on the money the first 2 years when I was using more of Kubota's money. That's also without figuring in a tax break I received by spreading payments over 5 years instead of taking a lump sum $100,000 out of the bank. If you don't believe me, have an accountant figure it out for you.