Darwin Escobar wrote:
Most clients end up wanting the format in the translated document to mimic the format of the original, so unless you charge for formatting, you will end up spending a bit more time working on the document, but not making very much even if you charge a high per word rate. (Unless you have top notch organization skills and perhaps you have a template ready to transfer the translation into.)
Even if you have a template to use, your productivity will be about 50% lower. So it doesn't make a lot of sense to charge by word count. You may track the time you spend in your next certificate translation job and see for yourself.