Does anyone know what the law allows on claiming the cost of a 1/2 ton business truck for 2006? On all my other business trucks (2 from the past), I was able to write what I paid for them off at one time. This is the first time I have bought a brand new work truck. I was told today that there was a new tax law in 2006 stating that you have to take a 3 year depreciation on any 1/2 ton truck or smaller. Is there any truth to this.