How to Write a Software RFP That Gets Real Bids

Long enough to answer a vendor's core questions and no longer. For most mid-market projects that means several pages covering context, goals, requirements, constraints, timeline, budget, and evaluation criteria. If it runs to dozens of pages of detailed specs, you have likely crossed from describing the problem into dictating the solution.

Yes, at least as a range. Hiding the budget produces scattered bids that are hard to compare and wastes time on vendors who are a poor fit. A range signals that you are a serious buyer and lets vendors propose scope that fits your investment rather than guessing at it.

Three to five is a practical range. Fewer than three limits your ability to compare, and more than five creates a heavy evaluation burden and signals a scattershot process that strong vendors may decline. Prequalify briefly so every invited vendor is genuinely capable of the work.

An RFP (request for proposal) asks vendors to propose an approach and solution to a problem, which suits custom software where the how is open. An RFQ (request for quote) asks for pricing on a clearly defined, fixed scope. Most custom software projects are better served by an RFP because the solution is not fully known upfront.

Give at least two to three weeks for a meaningful project, plus a window for clarifying questions. Rushing responses produces padded or careless bids because vendors cannot properly assess scope. If your timeline forces a shorter window, expect either higher risk premiums or fewer serious responses.