Start with the business problem, not a list of screens. What kind of user will use it day to day, how often, and what happens today? A vendor who understands the goal can propose an alternative that costs less; someone handed only the requirements as given will price the list as written.
Describe the scope as concrete flows: hire seo specialists a walk through each important path. Equally important, write down what is out of scope. A written out-of-scope list prevents more friction at delivery time than almost anything else in the document. Indicate as well which items are decided and which are still open — honest teams price those differently, and pretending everything is fixed helps nobody.
List the constraints. The list covers the platforms and go consulting services involved, the data you have and where it lives, security and compliance rules, user volumes, supported browsers or devices and any technology you are committed to. If there is a hard date, say what depends on it: a good team can often resequence the work to protect it, but only if they know it exists.
Write down what completion means feature by feature. Clear acceptance criteria do not need special syntax: a plain-language note setting out what must be true when the feature works is enough. That one addition compresses the review at the end by a surprising margin and closes off the most common source of disputes.
To close, say what you expect back. Request a task-level breakdown, the assumptions behind each number, the main risks and an optimistic and react development company a pessimistic figure. Take a broad range as information, not evasion: it usually points to where your description is thin. Then tighten that section and ask again — the revised figure tends to be the one worth planning around.