A common mistake that many new photographers make is assuming they keep every dollar they make. Businesses cost money. Whether you only offer digital files or you are a full-service studio, there are still costs involved. Cameras, lenses, memory cards, computers, hard drives, ink, paper, pens, internet, electricity, gas in your car—it adds up. If you’re serious about making money in this business, it’s important to treat it as a business. That means recognizing your expenses and learning to budget for them.