Where does a freelance website developer deduct expenses like hosting and domain names incurred while building websites for clients?

I have a part-time Website Design & Development Business. I know where most things are deducted, but I cannot find a definitive answer as to where I would deduct the the purchase of the domain (aka website) name and the hosting fees. Please keep in mind, I am not asking about a website for my own business. These are websites built for other small businesses. 

 

I purchase separate hosting accounts for each website. After completion of the website, I bill the client for hosting fees annually or quarterly as long as the website remains live. I include a certain amount of support and minor changes (minor = cumulative changes up to one hour per month) to the website in the hosting fee.

 

I've done a lot of research and I've found very little and often conflicting information.