A software requirement document is the most useful thing you can prepare before asking any company for a quotation. It does not need technical language. It is simply a clear description of what you want the software to do, written by the people who know the work. A good one gives you accurate estimates, fewer disputes and software that matches what you expected.
Why it matters
Without a written requirement, every company imagines a different project and quotes for it. You then compare prices for things that are not the same. During development, anything that was only said aloud is remembered differently by each side. A few pages written at the start prevent most of this.
The nine sections to include
| Section | What to write |
| 1. Background and goal | What your organisation does and what problem the software should solve, in three or four lines. |
| 2. Users and roles | Who will use it (for example owner, manager, operator, customer) and roughly how many of each. |
| 3. Current process | How the work is done today, step by step, including registers, Excel sheets or software in use. |
| 4. Features | What each user should be able to do. Mark each item as must-have, should-have or later. |
| 5. Data and reports | What information is stored and which reports you need daily, weekly and monthly. |
| 6. Integrations | Anything it must connect with: payments, SMS or WhatsApp, accounting software, devices, other portals. |
| 7. General needs | Languages, mobile use, number of locations, security expectations and where it will be hosted. |
| 8. Budget and timeline | A budget range if you have one, and any date that cannot move. |
| 9. Acceptance | How you will decide the work is complete, for example a list of tasks every role must be able to finish. |
How to describe a feature
Write features as things a person does, not as technical terms. For example:
- The receptionist registers a visitor with name, mobile number and purpose, and prints a pass.
- The manager approves or rejects a leave request and the employee receives a message.
- The owner sees today's sales, pending payments and low stock on one screen.
Sentences like these can be understood by you, by the developer and by the tester. Each can later be checked: either the receptionist can print the pass or not.
What to attach
- Blank copies of the forms and registers you use.
- A sample of your Excel sheets, with private data removed.
- Samples of the reports you prepare today.
- Screenshots of software or apps you like, with a note on what you like about them.
Mistakes that lead to wrong estimates
- Writing only a title, such as "school software", and expecting an exact price.
- Listing every idea as a must-have.
- Forgetting data migration from the old system.
- Leaving out exceptions: refunds, cancellations, corrections and returns.
- Not saying who approves what.
- Describing screens in detail but not the purpose behind them.
How long should it be?
For a small application, two or three pages are enough. A larger system with several departments may need ten to fifteen. Length is not the aim. If a stranger can read it and explain your process back to you, it is good enough to send.
How to use the document
Send the same document to every company you shortlist and ask each to mention anything unclear. Good companies will come back with questions; treat that as a positive sign. Once you choose a company, the document becomes the basis of the agreed scope, and later of the acceptance test. For help judging the replies, see our guide on how to choose a software development company.
A quicker way to start
If a blank page is the obstacle, the free Requirement Advisor asks eight short questions about your goal, users, modules, current system and integrations, and gives you a structured summary that you can print and expand. You can then read about our custom software development process or send us your draft for feedback.