I'm working on running numbers for my business plan. When estimating overhead, is 1/3 of your income/receipts a good number to estimate with? i'm trying to cover everything such as gas, oil, blades, mileage wear & tear, ins, etc. Basically more or less all overhead costs. Not sure if I'm clear so here is a concrete example: Total Income/Receipts for year: $60,000 Overhead Estimate: $20,000 THanks for your help!