What is the main cost normally incurred by developer?

The main costs incurred by developers typically include labor expenses, which encompass salaries and benefits for the development team. Additionally, expenses related to software tools, licenses, and infrastructure, such as servers and cloud services, can be significant. Project management and marketing costs may also contribute to the overall budget, depending on the scale and nature of the development project. Lastly, ongoing maintenance and support costs are essential to consider for long-term sustainability.