How to Write Software Requirements (Even If You're Not Technical)

The single biggest predictor of whether a software project succeeds isn't the development team's skill. It's whether anybody wrote down clearly what was supposed to be built.

Most failed projects we've been asked to rescue share the same origin: two parties who each remembered a different agreement. Nobody lied. Nothing was written.

Here's how to write requirements properly, even with no technical background. Doing this before you approach any vendor will save you more money than any negotiation.

Why This Matters More Than the Price You Negotiate

A clear requirements document does four things at once: it lets vendors quote accurately instead of guessing, it lets you compare quotes fairly because everyone priced the same thing, it prevents the scope arguments that poison projects in month three, and it forces you to think through decisions you'd otherwise make badly under time pressure.

Vendors who quote without one aren't being efficient. They're guessing, and you'll pay for the guess through change requests.

You Don't Need Technical Language

This is the misconception that stops business owners from writing requirements at all. You don't need to specify databases or frameworks — that's the development team's job.

What you need to describe is what the system does, for whom, and what happens in each situation. Plain sentences are better than technical vocabulary you're not confident using.

Section 1: Why This Exists

Start with the business problem in a few sentences. Not the solution — the problem.

"Our sales team handles roughly 80 enquiries a month. They're recorded in a WhatsApp group and a notebook. We don't know how many convert, follow-ups are missed regularly, and when someone leaves we lose their contacts entirely."

This paragraph does more work than people expect. A good development partner reading it may suggest a better approach than the one you had in mind — and can't, if you only describe the solution you already decided on.

Section 2: Who Uses It

List the types of people who'll use the system and what each needs to do. A sales person, a manager, an accountant, and a customer have different needs and different permissions.

For each, note their comfort with technology honestly. "Our billing staff have used only Tally" is genuinely useful information that changes design decisions.

Section 3: The Workflows (The Core of the Document)

This is where most of the value sits. Describe what happens, step by step, in plain sentences:

"A customer calls with an enquiry. The sales person records their name, phone number, requirement and expected budget. The system assigns a follow-up date. On that date, the sales person sees the enquiry in their daily list. After the call, they record what happened and set the next follow-up. If an enquiry has no activity for 15 days, the manager is notified."

Write one of these for every important process. Ten workflows described this well is a better specification than most Indian small businesses ever produce.

Section 4: What Happens When Things Go Wrong

The section everyone forgets, and where projects overrun.

What if a payment fails halfway? What if a customer wants a partial refund? What if two people edit the same record? What if stock goes negative? What if a required field genuinely doesn't apply?

Real business is full of exceptions. Software that only handles the ideal path gets abandoned within weeks, because reality never follows the ideal path.

Section 5: What It Must Connect To

List every system this must talk to: accounting software, payment gateway, WhatsApp, SMS service, existing databases, government portals. For each, note whether data flows one way or both.

Integrations are where estimates most commonly go wrong, so being explicit here protects both sides.

Section 6: Must-Have vs Later

Go through everything you've written and mark each item: needed at launch, or later.

Be ruthless. Every first list is too long, and the items you move to "later" are what let you launch this quarter instead of next year. You'll also discover after launch that some "later" items were never actually needed — which is money saved.

Section 7: The Practical Constraints

Note anything that affects design: Will staff use phones or computers? Does it need to work when the internet drops? How many users, and how many records roughly? Any data that must stay in a specific place? Any deadline driven by a business event?

What NOT to Put In

Technology choices, unless you have a genuine constraint like an existing system. Specifying a framework you read about limits your vendor's ability to recommend something better.

Screen designs, unless you're a designer. Describe what information appears and what actions are possible; let the design come after.

Vague quality words. "User-friendly," "modern," "fast" mean nothing measurable. "A billing entry should take under 30 seconds" is a requirement. "Fast" is a hope.

How to Use It

Send the identical document to every vendor you're evaluating. Then compare their responses — not just prices, but what they ask about.

The questions they ask reveal more than their quote. A vendor who reads your workflows and asks about the exceptions you didn't cover has understood your business. A vendor who quotes immediately without questions has skimmed it.

Expect the document to change during discussions. That's the point — better to discover a gap now than in month four.

The Ninety Minutes That Pays for Itself

Writing this takes an afternoon at most. It routinely saves lakhs, because scope clarity is the difference between a project that finishes and one that becomes a negotiation.

If you'd like help structuring your requirements before approaching vendors — including us — get in touch. Understanding what you actually need is the part of the process where the most money is won or lost.