If you send three agencies the same half-formed idea, you will get three quotes that look like they belong to different projects — and in a sense they do, because each agency filled your blanks with different assumptions. The fix is not to haggle over the numbers. It is to write a software agency project brief template before you ask anyone for a price: a short, honest document describing the business problem, what the software must do, and what you expect to receive. This guide is written for non-technical founders, operations managers and marketing leads who need to buy software development without getting burned. By the end, you will know exactly what goes into a brief that gets you comparable, accurate quotes — and which common mistakes inflate prices or sink projects.
MTD Technologies has spent 9+ years quoting projects across web, mobile and AI work — over 300 of them. The pattern is unmistakable: a good brief takes a client two or three hours to write and saves weeks of re-quoting, scope fights and surprise invoices. Here is how to write one.
Why your brief is the real price driver
Web development proposals routinely differ by a factor of ten. One widely cited analysis found that quotes diverge because agencies are quoting different things: different interpretations of the scope, different cost bases, and different amounts of risk baked in (premierlogic.nyc). The same analysis notes that published agency rate data puts US web development shops around $100 to $149 an hour, while agencies in the Philippines, Ukraine and Mexico sit around $25 to $49 — a 4x to 6x spread before anyone interprets your requirements.
The scope-interpretation gap is the part you control. “A platform with user accounts, listings and payments” can mean a lean MVP or a full marketplace with escrow, dispute workflows and an admin back office. Both are honest readings of a thin brief — and neither is the price you actually wanted. A fixed-price bid from a careful agency also carries a buffer for the unknowns in your brief; a low bid often does not, and the buffer shows up later as change orders. As the same guide puts it: a cheap fixed price with vague scope is the most expensive combination you can sign. The brief is where you remove the unknowns.
How agencies actually turn your brief into a quote
Every estimate ends in the same sum: hours multiplied by the hourly rate, plus running costs. Rates are easy to compare; the hours are where estimates differ. Agencies arrive at the hours in one of three ways (rocketech.it):
- Comparison with a past project. A team that built something similar gives a quick range. It is only as good as the match — always ask what the past project did not include.
- Counting part by part. The release is split into screens, integrations, admin work and infrastructure, and each piece is estimated separately. Slower, but it shows you exactly where the hours go.
- Building the unknown part first. If nobody has built something like your feature before, a short paid discovery or prototype turns a guess into a number.
Your brief feeds all three methods. The more precisely it describes the parts, the less the agency has to guess — and the less risk buffer lands on your invoice. Conversely, if a requirement is too uncertain to price confidently, a serious vendor should recommend a paid discovery phase rather than committing to a fixed scope (medium.com). Be wary of anyone who quotes an enormous, uncertain project to the penny with no questions asked.
For a cleaner comparison, ask vendors to separate their estimate into initial design and discovery, core product development, third-party services and infrastructure, testing and deployment, and ongoing maintenance — so you can compare like with like instead of bottom-line numbers that hide completely different assumptions.
The software agency project brief template, section by section
For a small or medium project, a few well-organised pages are enough. Do not agonise over length; completeness of the right sections matters far more. Here is the template, in the order agencies read it.
1. The business problem — never just the solution
Start with what hurts. “Our support team spends 30 hours a week re-entering orders from email into a spreadsheet” is a brief; “we need a CRM” is a wish. Agencies can design solutions, but they cannot discover your problem for you — and the problem determines the approach. State the current situation, who feels the pain, and what the pain costs you in time or money. One page is plenty.
2. Users and measurable goals
Who uses the software, and what does success look like in numbers? “Increase digital engagement” is a buzzword, not a goal. Replace it with something like: a native Android and iOS app that grows monthly active users by 25% within six months of launch and cuts support call volume by 15%. Agencies build toward metrics; they cannot optimise for vibes. Include the expected user scale too (tens of users vs. tens of thousands), because it changes the architecture and the price.
3. Scope: must-haves versus nice-to-haves
List the features the software must do to solve the problem, then a separate list of features that would be nice but are not essential. Tie each major feature to a user need or business outcome — a bare feature list does not say why anything matters or which items are load-bearing (medium.com). This separation is the single most powerful thing in your brief: it lets every agency quote the same core scope, so you can compare proposals honestly, and it gives you a lever to pull when the price is too high.
4. Integrations and existing systems
Forgotten integrations are the number-one source of “we didn’t budget for that” conversations. List every system the software must talk to: your CRM, payment gateway, accounting software, email marketing tool, legacy database, hardware devices. Include data migration if old data must move over — migrating ten years of customer records is real engineering work, not a checkbox. Also note what already exists: an existing WordPress site, a Shopify store, an internal API. Building on top of something is a different job from building from scratch.
5. Design, security and non-functional requirements
State plainly what you expect beyond features: does it need a branded design or are clean defaults fine? What are the performance requirements (page load, response time, expected users)? What security standards apply — especially if you handle payments or health data? Do you need accessibility compliance (WCAG)? Is there a mandatory technology stack? A preferred framework can be a valid constraint, but choosing technologies too early may rule out better-suited solutions, so explain the business reason behind any mandatory technical choice rather than dictating tools.
6. Budget range and timeline
Yes, include a budget range — we cover the why in a later section. Include your target launch date and any hard deadlines (a seasonal launch, a compliance date, an investor demo), plus whether the timeline is flexible. Break milestones down realistically: discovery and design, core development sprints, integration and testing, user acceptance testing, training, soft launch, full launch. Leaving room for discovery and testing in the schedule is a sign of a realistic plan, and agencies will price it accordingly.
7. What you want back in the proposal
Tell agencies how you will decide. Ask for a technical approach and architecture summary, relevant experience or case studies, team composition and availability, a transparent cost breakdown aligned to deliverables, and a description of how changes will be priced and approved. Stating your evaluation criteria up front — and giving every vendor the same brief — is what makes proposals genuinely comparable (axiosware.com). If you want options at different functionality levels, say so explicitly.
8. What happens after launch
Never assume hosting, testing, deployment, training, documentation and maintenance are included — they often are not, and they are often where the real cost of ownership sits. State who owns the source code and deliverables, whether you want a support retainer (a rule of thumb: budget roughly 15–20% of the build cost per year for maintenance), and what handover looks like if you ever move vendors. Clarifying ownership on day one avoids the nastiest dispute in agency work: discovering you cannot move your own software.
The RFQ mistakes that inflate your quote
We have reviewed hundreds of incoming briefs over the years. These are the patterns that reliably push prices up or quality down:
- The “build us everything” brief. “We need a platform like Uber but for dog walkers, with AI matching, payments, reviews, and a mobile app” produces proposals ranging from $15K to $250K because nobody is quoting the same thing (axiosware.com). Lead with the one thing that proves the concept.
- Describing the idea without the problem. When the business need is missing, vendors guess at priorities — and guessing rarely ends well.
- No decision timeline. If you say proposals are due in two weeks and then go quiet for two months, good vendors move on. Publish the decision date and keep it.
- Being too prescriptive about technology. Dictating the stack rules out agencies whose approach might fit better. Invite collaboration; a vague brief limits it, but a rigid one strangles it.
- Skipping the budget entirely. Without parameters, agencies cannot tailor realistic responses. You get either defensive over-quoting or unrealistically low bids that grow later.
- Forgetting the boring parts. Integrations, data migration, hosting, testing, training, documentation, source-code ownership. The parts nobody enjoys writing about are the parts that blow up budgets when omitted.
Should you share your budget with an agency?
Yes — and this is where we disagree with the instincts of most first-time buyers. A budget range does not hand the agency a blank cheque; it hands them a design constraint. It filters out mismatched vendors before everyone wastes weeks, it saves the agency from preparing a proposal you could never sign, and serious shops respect the transparency and respond in kind (axiosware.com).
If you genuinely do not know the likely cost, say so and ask for options at different functionality levels rather than one fixed quote on thin information. A range like “$25K–$40K depending on approach and timeline” gives the agency room to recommend the right scope instead of guessing. And treat early estimates as conditional: ask which decisions could change the price and how changes will be approved, so the quote is a conversation, not a trap.
From our experience: what agencies price, and what they guess
Here is the honest internal view. When your brief clearly separates must-haves from nice-to-haves, names the integrations, and gives a budget range, an experienced agency can produce a fixed quote with a small risk buffer — because the unknowns are small. When the brief is vague, we do one of two things: pad the quote with a big buffer (which you pay for), or quote optimistically and recover the difference in change orders (which you also pay for, with interest in frustration).
The projects that go smoothly are not the ones with the most detailed briefs — they are the ones where the client marks the unknowns clearly instead of hiding them. You do not need to know every detail before contacting an agency. What you must not do is leave unknowns invisible: flag them (“we are unsure whether the legacy database has an API — we will confirm in week two”) and let the agency price the investigation separately. A short paid discovery phase is the cheapest money you will spend if the core of your project is uncertain, and any agency that refuses to discuss one is telling you something.
One more reality check from 300+ projects: the cheapest comparable quote is rarely the cheapest project. The quote you can trust is the one whose assumptions are written down — which parts are included, how testing is handled, what counts as a change. A custom software development engagement lives or dies on those assumptions, and the brief is where you force them into the open before anyone signs anything.
Frequently asked questions
How long should a software agency project brief be?
For a small or medium project, a few well-organised pages are enough to start a serious conversation — cover the problem, users, must-have scope, integrations, budget range and timeline. Large enterprise projects may need fuller requirements documentation, but even then, the brief is the entry point, not the specification.
Can I use the same brief to get quotes from multiple agencies?
Yes — and you should. Sending the same brief to every agency is the only way to make proposals comparable, as long as every vendor receives identical information and assumptions. If one agency asks a clarifying question that changes the picture, share the answer with all of them.
What if my requirements change during development?
They will — that is normal. The right response is process, not panic: discuss the change with your agency before approving the work, ask for its impact on cost, timeline, testing and existing deliverables, and document the agreed change. Insist on a written change-approval process in the contract before the project starts.
Do I need technical knowledge to write a good brief?
No. Explain the business problem, who the software is for, what it must do, your budget range and your timeline — in business language. Leave the technology recommendations to the development team, unless you have a genuine constraint (an existing stack, a compliance requirement). Mark the questions you cannot answer and ask agencies to help resolve them.
Fixed price or time and materials — which should I ask for?
Fixed price suits well-defined scope with clear acceptance criteria; time and materials suits research, evolving products and ongoing development, where you pay for actual effort and can reprioritise — but you need real visibility of progress and spend. Many projects blend both: a short fixed discovery phase, then a fixed estimate for the first release or a controlled monthly delivery budget. The pricing model matters less than understanding what is included and how changes are handled.
A sharp brief turns agency quotes from guesswork into something you can compare, negotiate and trust. Write yours with the template above, send it to three or four agencies, and judge the responses on the quality of their questions as much as their numbers. If you would rather talk it through, contact MTD Technologies — after nine years and 300+ shipped projects, we can usually tell you in one call whether your brief is ready or what it is missing.