If you’re a company that sells services or software as a service rather than products or hard goods, establishing a billing system so you can get paid is one of the most crucial first steps. In addition to finding a reliable billing platform, you need to decide what kind of billing schedule you’re going to offer. For most companies, this means either annual billing, or charging customers on a monthly model. Each revenue model has its own pros and cons for you and your clients alike. Let’s take a look at a few.