Article
Write a Web Project Requirements Document Developers Can Quote Accurately
"How much for a website like Shopee?" is a question developers hear often. Without details, quotes can range from a few thousand ringgit to far more, because each developer imagines a different project. The business owner ends up confused, and the project starts on shaky ground.
A short, clear requirements document solves this. It does not need technical jargon. It needs to explain what the system should do, who uses it and what success looks like. This guide shows you what to include.
Start With Goals and Users
Begin with why the project exists. "Reduce WhatsApp enquiries about stock by letting customers check availability online" is far more useful than "we need a new website". Clear goals help developers suggest simpler solutions you may not have considered.
Then describe the users. Who will use the system: customers, staff, managers, suppliers? What do they need to do? A delivery driver on a phone and an accounts clerk on a desktop have very different needs.
- Business goal in one or two sentences
- Types of users and what each needs to achieve
- Devices they will mostly use
- Languages required
Include the current process too. Describe how the work is done today, step by step, even if it is messy: "Customer messages on WhatsApp, staff check a spreadsheet, then reply with available dates." Developers can then spot where software actually removes effort.
Describe Features as User Stories
A simple way to describe features is the user story format: "As a [user], I want to [action], so that [benefit]." For example: "As a customer, I want to book a service slot online, so that I do not have to call during working hours."
List stories in order of importance. Mark which are must-haves for launch and which are nice to have later. This lets developers quote a realistic first version and gives you a roadmap for future phases.
Tip: separating must-haves from nice-to-haves is the single best way to control cost. Most projects can launch with far fewer features than the first wishlist.
Add simple acceptance criteria to important stories, such as "the booking confirmation email arrives within a minute" or "staff can see all bookings for the day on one screen". These make testing at the end objective rather than a matter of opinion.
Include Integrations, Data and Content
- Integrations: payment gateways, accounting software, courier services, WhatsApp, CRM or existing systems.
- Data: what data exists today, where it lives and whether it needs migrating.
- Content: who writes text, provides photos and translates content.
- Admin needs: what staff must be able to update without a developer.
- Reports: what numbers managers need to see.
Integrations often drive cost more than pages do. Our guide on API integrations that save hours explains common connectors.
Mention who will own accounts for third-party services, such as the payment gateway, email service and hosting. Ideally the business owns them and grants the developer access.
Non-Functional Requirements
These describe how the system should behave rather than what it does:
- Expected number of users and peak times, such as festive sales
- Speed expectations on mobile networks
- Security and privacy needs, including personal data handling under the PDPA
- Hosting preferences and who maintains it after launch
- Accessibility and browser support
- Backup and recovery expectations
Being clear about maintenance after launch is especially important. Ask for a quote that includes support, or at least a separate maintenance proposal. See maintenance plans that prevent 2am emergencies.
Budget, Timeline and Decision Process
Share a budget range if you have one. Developers can then propose what is realistic within it, instead of guessing. Mention any fixed deadlines, such as a product launch or festive campaign, and who will approve designs and test the system.
Include examples of websites or apps you like and dislike, with a short note on why. Attach screenshots of current spreadsheets or forms the system will replace. These reduce misunderstanding more than long descriptions.
Finally, ask each developer to list assumptions and exclusions in their quote. Comparing those lists side by side shows who has understood the project and prevents surprises later.
Keep the document updated as decisions are made.
FAQ
How long should a requirements document be?
For most SME projects, a few pages is enough. Clarity matters more than length.
Should I hire someone to write it?
For complex systems, a paid discovery phase with a developer or consultant can save money overall.
What if requirements change mid-project?
They often do. Agree on a change request process upfront so changes are priced and scheduled clearly.
A clear requirements document leads to accurate quotes, fewer arguments and a better product. Explain goals and users, describe features as stories, separate must-haves from extras, list integrations and maintenance needs and share a realistic budget.