A SaaS MVP budget splits into two buckets: a one-time build cost (the labor to design and ship the first version) and recurring monthly costs (hosting, database, payments, email, domain). Build labor dominates — for a focused MVP it ranges from roughly a few thousand dollars with a solo developer to mid-five-figures with an agency, while recurring infrastructure for an early-stage product is often near zero on free tiers and tens of dollars a month once you have paying users. The trap is budgeting only for the build and forgetting the monthly line items and hidden costs that arrive after launch.
This post breaks the budget down line by line so you can build a spreadsheet that survives reality. It supports the broader software development cost: pricing for web apps and SaaS pillar — here I zoom in on the SaaS MVP.
Key takeaways
- A SaaS MVP budget has two parts: one-time build labor and recurring monthly costs. Plan both before you write a check.
- Build labor is the biggest line. Solo developers and agencies produce very different totals for the same scope — general ranges differ by an order of magnitude, not a small markup.
- Early-stage infrastructure is usually free to cheap. Firebase, Supabase, and similar platforms have generous free tiers; you pay tens of dollars a month, not thousands, until you have real traffic.
- Payments cost a percentage, not a subscription. Stripe takes a per-transaction fee; there is no monthly base cost to start collecting money.
- The costs that wreck budgets are the hidden ones: scope creep, post-launch fixes, design polish, and the ongoing maintenance nobody quotes upfront.
What goes into a SaaS MVP budget?
Every MVP budget I have built for a real product has the same skeleton. Fill in your own numbers, but do not skip a row.
One-time (build):
- Discovery and scoping — turning a vague idea into a concrete feature list.
- UI/UX design — wireframes through to a usable interface.
- Frontend development — the app users actually click.
- Backend and database — auth, data model, business logic, security rules.
- Payments integration — subscriptions, checkout, webhooks.
- Testing and launch — QA, deployment, the first round of fixes.
Recurring (monthly):
- Hosting / serverless platform.
- Database and storage.
- Authentication (often bundled with the platform).
- Transactional email.
- Domain (annual, but budget it monthly).
- Payment processing fees (a percentage of revenue, not fixed).
- Maintenance and small changes.
The two buckets behave differently. Build cost is front-loaded and large; recurring cost is small at first and grows with usage. Founders who only budget the build are surprised three months in.
How much does the build labor actually cost?
This is the line everyone wants a number for, and it is the line where who you hire changes everything. The same MVP scope can be a few thousand dollars or mid-five-figures depending on whether a solo developer ships it or an agency does. I lay out the full reasoning in the software development cost and pricing pillar, but the short version: an agency carries project managers and overhead that a solo builder does not, so the same feature list costs more through an agency. Solo work costs less but concentrates risk in one person.
What moves the build number most is scope, not hourly rate. A clinic SaaS I built — Callidus, a React, TypeScript, and Firebase app with per-tenant Firestore security rules driven by JWT tenantId claims and Stripe Connect Standard for payouts — came together solo over roughly ten weeks (mid-February to late April 2026). It replaced an earlier no-code attempt in FlutterFlow that had accumulated around 200 errors and stalled. The lesson for your budget: a tight, well-scoped feature list is cheaper to build correctly than a sprawling one is to build badly and rescue. Every feature you add is labor on the build line and surface area on every recurring line forever after.
If you want a realistic week-by-week picture of where that labor goes, the 12-week realistic SaaS MVP roadmap maps the build against a calendar, and the SaaS MVP development guide covers how to scope down to the version that earns its first dollar fastest.
What are the recurring monthly costs?
Here is the good news that surprises most first-time founders: running an early-stage SaaS is cheap. The platforms are built so that a pre-revenue product costs almost nothing.
- Hosting and serverless: platforms like Firebase, Supabase, and Vercel have free tiers that comfortably cover an MVP with light traffic. You move to a paid tier — usually starting around a couple of tens of dollars a month — when you cross usage thresholds, which means you have users.
- Database and storage: bundled into those same platforms. Free until you have meaningful data volume, then metered.
- Authentication: typically included with the backend platform at no extra line item for an MVP. Firebase Auth and Supabase Auth are part of the free tier.
- Transactional email: a service for password resets, receipts, and notifications. Free tiers cover thousands of emails a month; paid plans start low. Bestek, a restaurant ordering web app I built on React and Supabase, sends its operational email this way alongside Supabase Realtime for live order updates.
- Domain: roughly the cost of a coffee per month when you amortise the annual fee. The one line you pay before launch.
Add it up and a freshly launched MVP often runs on free tiers plus a domain until traction forces you onto paid plans. Budget for the paid tiers anyway — the moment they kick in is the moment your product is working.
How do payment processing fees work?
Payments confuse budgets because founders expect a subscription line and there usually isn't one. Stripe and similar processors charge a percentage per transaction plus a small fixed amount per charge — you pay when you collect money, scaling directly with revenue. There is no monthly base fee to start.
The nuance is what kind of payment flow you need. A standard subscription product collects money for itself. A platform that pays out to other businesses needs something like Stripe Connect, which I used in Callidus so the clinic could route payouts correctly. BookBed, a property management SaaS I built with Flutter, Firebase, and Stripe, prices at €9 a month for up to 20 units — a flat subscription where the processing fee is a slice of each €9 charge. Whichever model you choose, budget payments as a percentage of revenue. The full mechanics are in the SaaS billing and payments guide, and how to present those prices is in the B2B SaaS pricing page that converts.
What are the hidden costs nobody quotes you?
This is the section that saves budgets. The line items above are the ones people quote. These are the ones that quietly double a project:
- Scope creep. The single biggest budget killer. Every "can we also just add…" is build labor that wasn't in the estimate. Fix the feature list in writing before work starts.
- Post-launch fixes. No first version ships perfect. Budget a block of developer time for the weeks after launch — bugs and small UX corrections that no plan predicts.
- Design polish. A functional MVP and a credible-looking one are different amounts of work. If you want it to look like a product people pay for, budget design time, not just development.
- Cross-platform reach. Wanting your product everywhere costs more, unless your stack handles it. BookBed runs from one Flutter codebase across iOS, Android, Web, macOS, Linux, and Windows — six platforms without six separate builds — a decision made at the architecture stage, not a free bonus.
- Localisation. Each language is real work, in the UI and in ongoing content. Bestek shipped in four languages (English, German, Italian, Croatian); that breadth was scoped and budgeted, not added for free at the end.
- Ongoing maintenance. The build is not the finish line. Dependencies update, platforms change pricing, security needs patching. Reserve a small recurring budget, or the product decays.
Name these lines even if the numbers are estimates. A budget that pretends they don't exist is the one that blows up.
How does solo versus agency change the budget?
The choice of who builds it is the largest single variable in your MVP budget. An agency gives you a team, process, and continuity if one person leaves — and you pay for all of it, which is why the same scope costs materially more. A solo developer gives you a lower total and a direct line to the person writing the code, at the cost of concentrating the project in one schedule and one skill set.
Neither is universally right. A genuinely simple, well-scoped MVP is often a strong fit for a solo build — Callidus, BookBed, and Bestek were each shipped that way, end to end. A larger or compliance-heavy product may justify an agency's depth. The cheapest path is the smallest correct feature list, built once, by whoever fits that scope. The cost reasoning behind both routes is in software development cost: pricing for web apps and SaaS.
FAQ
How much does it cost to build a SaaS MVP?
It splits into one-time build labor and recurring monthly costs. Build labor is the dominant figure and ranges widely — from a few thousand dollars with a solo developer to mid-five-figures with an agency for the same scope. Recurring infrastructure is often near zero on free tiers early on, rising to tens of dollars a month once you have paying users.
What are the ongoing monthly costs of running a SaaS?
Hosting and database (often free at first, then a couple of tens of dollars a month), transactional email (free tier covers an MVP), a domain (a few dollars a month amortised), and payment processing fees (a percentage of revenue, not a fixed charge). Budget a small maintenance allowance on top.
Why do agency and solo quotes differ so much for the same MVP?
An agency carries project managers, account handling, and overhead that a solo developer does not, so the same feature list costs materially more through an agency. Solo work is cheaper but concentrates the project in one person's availability and skill. The right choice depends on scope and risk tolerance, not on which is universally better.
What hidden costs should I add to my MVP budget?
Scope creep, post-launch fixes, design polish, cross-platform or multi-language reach, and ongoing maintenance. These are rarely in the headline quote and are the most common reason a budget doubles. Name each as a line item even if the figure is an estimate.