Founders usually ask "how long will it take?" before they have written down what "it" is. The honest answer is that a SaaS MVP built by a senior team from a clear scope takes 8-12 weeks, and the same MVP without a clear scope takes as long as your patience and budget last.
This is the week-by-week plan we run with clients in the US, UK and Australia. It assumes a two-person senior team (full-stack plus a second engineer or designer-developer), a written scope, and a founder who is available for decisions within a day.
What "SaaS MVP" means here
- Sign-up, login, password reset
- Organisation or workspace model (multi-tenant from day one)
- Subscription billing with a free trial or free tier
- Two or three core workflows that prove your value proposition
- Basic settings, team invites (owner and member only)
- Transactional email
- Deployed, monitored, backed up
Everything else - roles and permissions matrices, native mobile, integrations marketplace, custom reporting, white-labelling - is version two.
Week-by-week
Week 1 - Scope and architecture
- Scoping workshop: list workflows, decide what is in and explicitly out
- Data model sketch, tenancy approach, stack decision
- Wireframes for the core workflows (low fidelity)
- Written scope with milestones, out-of-scope list and change-request rate
- Repo, cloud accounts and CI pipeline created in your accounts
Deliverable: a scope document you could hand to any competent team.
Weeks 2-3 - Foundations
- Auth (sign-up, login, reset, session handling)
- Organisation model and tenant isolation
- Stripe subscriptions, webhooks, trial logic, customer portal
- Base UI shell with a component library
- Transactional email (welcome, reset, invoice)
- Staging environment, automated deploys, error monitoring
Deliverable: a user can sign up, create a workspace, start a trial and log in on staging.
Billing touches the data model, the auth flow and every gated feature. Doing it early means every workflow is built with plan limits in mind, and you avoid a two-week retrofit before launch.
Weeks 4-8 - Core workflows
One workflow per week, roughly. Each includes UI, backend, data, edge cases and tests. Demos at the end of each week; feedback goes into the next week's plan, not into scope changes.
- Week 4: workflow one (the one that proves the value proposition)
- Week 5: workflow two
- Week 6: workflow three or polish on one and two
- Week 7: settings, team invites, onboarding flow
- Week 8: empty states, error states, loading states, mobile responsiveness
Deliverable: a product a friendly customer could use end to end.
Weeks 9-10 - Beta and hardening
- Five to fifteen real users on the product
- Bug fixes prioritised by frequency, not by who shouted
- Performance pass on the slowest pages
- Security checklist: rate limiting, input validation, secrets, backups tested
- Analytics events on the key actions
- Legal pages, cookie consent where required (UK/EU/Australia)
Deliverable: no known critical bugs, backups verified, monitoring alerting.
Weeks 11-12 - Launch
- Production cut-over, DNS, SSL
- Pricing page live, checkout tested with real cards
- Launch email, support inbox, status page
- Handover documentation: architecture, runbooks, how to deploy
- Post-launch plan: which metrics to watch, what version two looks like
Deliverable: paying customers and a documented codebase you own.
What slows SaaS MVPs down
From our project history, in order of frequency:
- Scope creep. "While you're in there, can we also..." Each addition is a week. Use the change-request process; defer to version two by default.
- Late design changes. Changing the UI direction in week 7 costs two to three weeks. Lock the visual direction by week 3.
- Integrations nobody validated. That "simple" CRM sync with a poorly documented API. Spike every non-trivial integration in week 1.
- Slow decisions. A founder who takes four days to answer a question adds a month to a 12-week project. Agree a one-business-day decision SLA.
- Perfectionism before users. Polishing a feature nobody has used yet. Ship to beta at week 9 regardless.
What to defer to version two
- Roles beyond owner and member
- Native iOS/Android apps
- SSO and enterprise auth
- Integrations marketplace
- Custom reporting and exports beyond CSV
- White-labelling and custom domains
- Localisation
Every one of these is a legitimate feature. None of them tells you whether people will pay.
How the timeline changes by who builds it
| Team | Typical SaaS MVP timeline | Why |
|---|---|---|
| Senior remote agency (2 engineers) | 8-12 weeks | Fixed scope, senior-only, starts in days |
| Domestic US/UK/AU agency | 16-24 weeks | Discovery phase, mixed seniority, PM layers |
| Solo freelancer | 12-20 weeks | One person, no parallel work, availability risk |
| No-code | 2-6 weeks | Fast, but rebuild likely once paying users arrive |
| Technical founder alone | 12-24 weeks | Doing everything else too |
Cost for this scope
| Scope | USD | GBP | AUD | CAD | NZD |
|---|---|---|---|---|---|
| GridCore (senior remote team) | $10,000 - $25,000 | £7,800 - £19,500 | A$15,000 - A$37,500 | C$13,600 - C$34,000 | NZ$16,500 - NZ$41,250 |
| Domestic agency | $80,000 - $200,000 | £62,400 - £156,000 | A$120,000 - A$300,000 | C$108,800 - C$272,000 | NZ$132,000 - NZ$330,000 |
| Solo senior freelancer | $25,000 - $60,000 | £19,500 - £46,800 | A$37,500 - A$90,000 | C$34,000 - C$81,600 | NZ$41,250 - NZ$99,000 |
Non-USD figures are indicative conversions; we invoice in USD, GBP or AUD.
Building a SaaS MVP with GridCore
We build SaaS MVPs on exactly this timeline for founders in the US, UK and Australia: written scope in week one, fixed price, weekly demos, and a documented codebase in your accounts at the end. From $10,000 USD for the full scope above; lean single-workflow MVPs from $4,000.
See SaaS platform development, the MVP cost guide, or book a scoping call.
