At the time of answering an email, I quoted a company overseas by X/hr based on the assumption that I would be building with ABC technology stack.
During discussion over the phone, it turns out we will be using XYZ and ABC technology stack.
Working with XYZ and ABC will require things outside of "coding", meaning it takes time to research to find best practices, quality assurance, documentation etc.
How can I explain to a client I meet next week that the hourly rate I quoted will be higher? How much higher would be justified?
In short, I feel that my rate is quite low and feel like I should correct it.