The language pair, the complexity of the document, its format, the turnaround time, and the particular service can all affect how much a certified translation will cost.
The best certified translation services will offer a quote based on the particular requirements of the client, taking into consideration the amount of text to be translated, the languages used, the particular subject matter, and the turnaround time.
The usual fee structure for certified translation services is by the word, the page, or the hour. As they demand specialized knowledge and skills from the translator, certified translations for legal, medical, or technical papers are typically more expensive than translations for general materials.