A Product Requirements Document, demystified — what's in one, what isn't, why developers desperately want yours, and a section-by-section template.
PRD stands for Product Requirements Document. In practice it is the most quietly powerful artifact in early product work, and the one most first-time founders either skip or wildly over-engineer. This essay is a working founder's definition: what a PRD actually is, what it isn't, and a section-by-section template you can use this week.
A working definition
A PRD captures the what and the why of your product so that designers and engineers can focus entirely on the how. It is the founder's source of truth — the single document everyone returns to when a decision is in question.
A PRD is not a specification of every screen. It is not a wireframe. It is not a design system. It is not a roadmap. It is the thing those artifacts get built from.
Why PRDs exist
Engineers do not need to be told how to write code. They need to be told what to build and why it matters. Without a PRD, every architectural decision is made on partial information — and every partial decision becomes a future rework.
A good PRD does three things:
- It locks the founder into specific decisions, so they can't be quietly revised mid-build.
- It gives engineers enough context to make sensible trade-offs at the code level.
- It gives designers enough constraint to design something coherent instead of decorative.
A PRD is a contract between your future self and your build team. Without it, both parties improvise.
What a strong PRD contains
Here is the section list I use for MVP-stage PRDs. Anything longer is usually a sign of indecision dressed up as thoroughness.
1. Product vision
Three to five sentences. What is the product, who is it for, what does the world look like when it succeeds. This section gets read every time someone joins the project and never thereafter.
2. The hypothesis
The one sentence your MVP exists to test. Format: "If we give [user] the ability to [action], they will [behavior] because [reason]." Everything downstream gets evaluated against this.
3. Target user
One primary persona. Real specifics — role, context, daily workflow, what they're using today, what frustrates them. Stock photos and demographic ranges are a sign you haven't done the user research.
4. User stories
"As a [user], I want to [action], so that [outcome]." Each story gets acceptance criteria — the conditions under which the story is considered done. Stories are ordered by priority, not grouped by feature.
5. Functional requirements
What the product does, organized by capability. Auth, core workflow, payments, notifications, admin. Each requirement is testable. Vague language ("intuitive," "seamless," "powerful") is rewritten until it isn't.
6. Non-functional requirements
Performance targets, security expectations, accessibility commitments, browser/device support, uptime expectations. The constraints that shape architecture but don't show up as features.
7. Success metrics
How you know the MVP succeeded. Activation rate, retention at day 7, conversion to paid, time-to-value. Three metrics, maximum. If everything is a metric, nothing is.
8. Out of scope
An explicit list of what the MVP will not include. This is the most important section. It's where the strategy actually lives.
9. Open questions
The decisions that are still in flight, who owns them, and the deadline. A short list is healthy. A long list means you're not ready to build.
What a PRD is not
- It is not a wireframe. Wireframes are how you express the user stories visually. They come after.
- It is not a design system. Components, tokens, and patterns belong in a separate artifact.
- It is not a project plan. Timelines, milestones, and sprint structure live in your project tool.
- It is not a one-time document. PRDs get revised. Version them. Date them. Note what changed and why.
Length
An MVP-stage PRD should be 8–15 pages. Longer than that and you've either over-specified (which is a form of procrastination) or you've smuggled implementation details into the requirements (which is also procrastination, just better disguised).
If your PRD is shorter than 4 pages, you've under-specified. The artifact won't withstand a single sprint review.
How to start one this week
- Open a blank document. Title it: "[Product Name] — MVP PRD v0.1."
- Write the vision in one paragraph. Don't optimize it.
- Write the hypothesis sentence. Show it to one other person. Rewrite until they can repeat it back.
- Write 10–20 user stories. Cut to the 5–8 that directly support the hypothesis.
- Add acceptance criteria to each surviving story.
- Write the out-of-scope list. Spend more time on this than feels reasonable.
- Hand it to one engineer you trust. Ask: "could you quote this?" Their first round of questions is your second draft.
That's a real PRD. It's also a meaningful chunk of what the Development Readiness Package produces — done in a structured way, with a deadline.