Software Development RFP: How to Prepare One

How do you prepare a software-development RFP? By clearly describing the problem to solve, the scope, the constraints and the selection criteria — not by dictating a technical solution. A good RFP (Request for Proposal) is not a frozen 80-page spec: it is a document that gives suppliers enough context to propose and enough structure for you to compare them honestly. This guide explains what to put in it, when an RFP is useful (and when it is not), and provides a simple outline to adapt.

In short: an effective RFP describes the why and the what (goals, scope, constraints) more than the how (which you leave the supplier to propose). It makes bids comparable by imposing a common response structure, and it protects both parties by making budget, timeline and evaluation criteria explicit. This guide provides no figures: budget and timeline ranges depend on your scope — see our dedicated cost and ROI guides.

What is an RFP?

An RFP is a document through which you describe a need and invite suppliers to propose an approach, a plan and a price. It differs from a simple quote by its structure: it asks all candidates the same questions, making responses comparable. It differs from a detailed specification by its openness: it describes the problem and leaves room for the supplier's expertise, rather than over-specifying a solution you may not have validated yet.

When to use one

• The project is defined enough to be described, but open enough to benefit from proposals.
• You are comparing several suppliers and want a common evaluation base.
• The stakes justify the rigor: significant budget, governance, multiple stakeholders.
• You need to document the choice (procurement, internal compliance).

When NOT to use one

An RFP has a cost — for you and for the respondents. It is disproportionate when the need is small or exploratory, when you do not yet know what you want (a diagnostic or a scoping workshop serves better than a premature RFP), or when you already have a trusted partner for a well-known perimeter. Forcing an RFP where a conversation would suffice slows everyone down without improving the decision. The RFP is a structured-comparison tool, not a mandatory step.

Information every RFP should contain

A readable RFP holds a few clear sections rather than an exhaustive block:

• Context and goals — who you are, the problem to solve, the expected outcome.
• Scope — what is included, what is not, the systems to integrate.
• Requirements — functional, technical, security (detailed below).
• Constraints — existing systems, regulation, hard deadlines.
• Expected response format — to make bids comparable.
• Evaluation criteria and timeline — how and when you will decide.

Functional requirements

Describe what the software must do, from the user's point of view: journeys, roles, business rules, edge cases. Express them as expected outcomes ("a manager must be able to approve a request in one click") rather than imposed solutions. Separate the must-have from the nice-to-have: this prioritization helps suppliers propose a realistic scope and helps you arbitrate. Depending on the product — web application, mobile application, business software or SaaS — functional requirements do not take the same shape.

Technical requirements

State the real technical constraints, without over-specifying: existing systems to integrate, expected volumes, performance and availability requirements, hosting preferences, data and reporting needs, and where relevant AI. Avoid the trap of dictating the stack: let the supplier propose the architecture, and justify your constraints rather than imposing them. A good respondent will explain its choices — a signal of mastery.

Security requirements

Make your security and data-protection expectations explicit: authentication, access management, encryption, logging, backups, and the applicable legal framework (Swiss nFADP, European GDPR). Specify who is responsible for what — the supplier delivers and documents the technical layer, your regulatory compliance stays yours. In sensitive sectors like finance or healthcare, these requirements weigh heavily in the evaluation and deserve a dedicated section.

Budget considerations

Should you state a budget in an RFP? Often yes — at least a range — because it avoids receiving out-of-reach bids and lets suppliers calibrate their proposal. Ask for a costing on total cost (build, maintenance, hosting, evolutions), not just the V1. This guide gives no amount: real ranges depend on your scope, and the method to establish them is detailed in our software project cost guide; how to assess the return, in the ROI guide.

Timeline considerations

State the deadlines that truly matter — a regulatory constraint, an event, a season — and distinguish them from "comfort" dates. Ask suppliers to propose a timeline in testable increments rather than a single distant delivery date; it is a better indicator of mastery and reduces risk. Beware timeline commitments given without having seen the scope in detail: this guide cites no "typical" duration, because it depends on the project.

Vendor evaluation criteria

Announce in advance how you will decide — and weight it. Beyond price, evaluate technical strength, product mastery, delivery process, communication, security, and ownership (code, repositories and accounts in your name). The full evaluation grid is in our partner selection guide. An often-forgotten but decisive criterion: does the supplier advise you against what makes no sense? It is a sign of partnership, not commercial compliance.

Common mistakes

• Over-specifying the solution — dictating the stack deprives you of the expertise you came for.
• Hiding the budget — invites uncalibrated bids and wastes everyone's time.
• Vague or absent evaluation criteria — the decision becomes subjective and contestable.
• Comparing bids at different scopes — without a common response format, the comparison is skewed.
• Forgetting maintenance and ownership — see build vs buy and ERP vs SaaS to frame the underlying decision.

A simple RFP outline

A light structure suffices for most projects. Adapt it to your context:

The decision checklist

• Do I really need an RFP, or would a scoping exercise suffice?
• Have I described the problem rather than dictated the solution?
• Do my requirements separate must-have from nice-to-have?
• Are my budget and timeline explicit and realistic?
• Are my evaluation criteria announced and weighted?
• Does the response format make bids comparable?
• Have I required ownership of the code and data?

A respondent's sector proof is checked on real work — Omnia, Watchonista, FlySpa, E. Gutzwiller — and on understanding of your sector, whether manufacturing, real estate, retail or luxury and media.

Frequently asked questions

RFP, specification, quote: what is the difference?

The RFP describes a need and invites proposals, with a common response format to compare. The specification details a solution. The quote prices a defined service. The RFP sits upstream: it serves to choose a partner and an approach, not to freeze every screen.

Should you state the budget in an RFP?

Most often yes, at least a range: it avoids out-of-reach bids and helps suppliers calibrate. Hiding the budget wastes everyone's time. Ask for a total-cost costing, not just the V1.

How long should a good RFP be?

Enough to describe the problem and constraints, no more. A concise, well-structured RFP attracts better responses than an exhaustive block. Eight clear sections suffice for most projects.

Should you impose the technology in an RFP?

Rarely. Describe your constraints (existing systems, performance, security) and let the supplier propose the architecture. Dictating the stack deprives you of the expertise you seek; a good respondent justifies its choices.

How many suppliers should you invite?

Enough to compare, not so many as to overwhelm your evaluation team: a targeted shortlist beats a mass send. Beyond a few serious candidates, evaluation dilutes.

How do you make bids comparable?

By imposing a common response format and weighted evaluation criteria announced in advance. Without this structure, you compare proposals at different scopes and presentations — a skewed comparison.

What if no bid fits?

It is a legitimate outcome: better an unsuccessful RFP than a bad choice. Often it reveals a poorly framed need — a diagnostic or scoping workshop helps reformulate before relaunching.

Preparing an RFP, or unsure whether to launch one? Let's talk for 30 minutes or request a diagnostic in 48 hours — we help you frame the need before consulting, with no commitment.