The larger your company is the more costly it is to do something even as simple as a static html page. That's because everything that goes out to the public has to be subject to a heavy review process. You're not being paid to write an html page you're being paid to shepherd new information to the public. That's why you can never just estimate cost only on how hard you think it would be to do the task you need to get enough information about the customer's process to understand how much work its going to take not just to complete the task but to shepherd it through their review process and the larger the company the more layers of review and process they are likely to have.