In 2016 I purchased the business I had previously been a contractor for. Can I deduct that purchase?

The purchase price of a business is not deductible.

Usually, the purchase price can be divided in two parts: tangible assets (such as furniture, computers, equipment) and intangible assets (goodwill, patents, going concern). Tangible assets are depreciated over their useful life. Intangible assets are amortized over 15 years.

I am wondering the something similar - I made deductible business spending in December as I set up my independent contractor business but first payment won't come until mid January.  How to deduct the December expenses?