Ok guys I know all about the "don't go in with a partner" thing, let's save that for another thread, my partner is my brother and yeah partnerships sucks but it's my brother so it's not changing. Anyways, this year I decided to become meticulous with expenses, I have several spreadsheets that I made up from scratch detailing an expense in a certain category, what percentage that expense was of my gross, what percentage my expenses were compared to gross, etc etc... Now I'm also working on a cost analysis for my trucks and equipment, to start with I created a grid on a sheet that each time you fill up a truck or mower you write down the following: Which mower or truck(or handheld gas) Hours on the mower or truck(yep Fords have hourmeters) Mileage for the truck What the price of gas was at the time of fill up I then take those numbers and calculate my cost of fuel per hour/mile and also fuel economy. Along those lines, I want to take the yearly expense for a mower or truck(repairs, routine maintenance such as oil changes, blades, belts, anything that breaks, etc), and going off the hours on the machine or mileage on the truck, figure at the end of the year what that piece of equipment costed me. Here's the disagreement. My brother is throwing a fit, telling me that what I'm doing is stupid and unnecessary, all that matters is that there is more money coming in than going out, it's a waste of time, and he doesn't want to record hours on the mowers when he fills them up nor the price of the gas, he says he already knows "200/month per truck and 50/month per mower" is what he keeps saying... But I want it more precise than that. He claims that it will slow him down, all he wants to do is pull up to the pump and go. I say it will take him 2-3 minutes to write it on the reciept of the grid I've created which we can carry on a clipboard in either of our trucks. My line of thinking is that if I do not know exactly where and how much of the money is going, I can't efficiently control my expenses. My brother thinks it's all a waste of time, and that I'm micromanaging. He claims to understand it all, but says it's not necessary. In your guys' opinion am I getting too detailed? I think I'm right, but I don't know. You always think you're right when it's your idea. Opinions?