How to Launch a SaaS Product in 90 Days
90 days from idea to paying customers. Here's the exact playbook for launching a SaaS product — week by week, with real timelines and costs.
90 days. That's all you need to go from validated idea to live SaaS product with paying customers.
Not 90 days of perfection. 90 days of focused, ruthless execution. Here's the playbook.
Why 90 Days?
Longer than 90 days and you're overthinking it. Shorter and you're cutting corners that will cost you later.
90 days gives you enough time to build something real, test it with actual users, and launch with confidence — without burning through your entire runway.
Weeks 1–2: Foundation
Goal: Know exactly what you're building and for whom.
Define your ICP (Ideal Customer Profile). Not "small businesses." Specific: "B2B SaaS companies with 10–50 employees that manually track customer onboarding in spreadsheets."
Write 10 user stories. Not 50. Ten. The ten things your product absolutely must do on day one. Use the format: "As a [role], I want to [action], so that [benefit]."
Choose your stack. For most B2B SaaS products built for speed:
- Frontend: Next.js or React
- Backend: Node.js or Python
- Database: PostgreSQL or MongoDB
- Hosting: Vercel, AWS, or Railway
- Payments: Stripe
Don't spend a week debating frameworks. Pick proven tools and move. MAGEHIRE can help you choose the right stack based on your specific product needs.
Set up your project. Repository, CI/CD pipeline, staging environment, project management board. This takes a day, not a week.
Weeks 3–6: Core Build
Goal: Working product with the core user flow.
This is where most of the engineering happens. Build in 2-week sprints:
Sprint 1 (Weeks 3–4):
- User authentication (signup, login, password reset)
- Core data model and API
- Basic UI shell with navigation
- Database schema and migrations
Sprint 2 (Weeks 5–6):
- Primary feature (the one thing that delivers value)
- Basic settings and user profile
- Error handling and loading states
By week 6, you should have a working product that one person can use end-to-end. Ugly is fine. Broken is not.
Weeks 7–8: Polish & Payments
Goal: Make it good enough to charge money for.
- Integrate Stripe for subscriptions
- Build the pricing page
- Add onboarding flow (first-run experience)
- Fix the top 10 UX issues from internal testing
- Create transactional emails (welcome, invoice, password reset)
- Set up error monitoring (Sentry) and analytics (Mixpanel or PostHog)
Important: "Polish" doesn't mean "redesign." It means fixing what's broken and making the happy path smooth.
Weeks 9–10: Beta Launch
Goal: Get 10–20 real users using your product.
- Launch to a private beta list (friends, network, early signups)
- Offer 3 months free in exchange for weekly feedback
- Watch session recordings to see where users struggle
- Do 5 customer interviews: "What confused you? What's missing? Would you pay for this?"
This is the most important phase. You'll learn more in 2 weeks of beta than in 2 months of planning.
Weeks 11–12: Iterate & Public Launch
Goal: Fix what beta revealed, launch publicly.
- Fix the top 5 issues from beta feedback
- Build the #1 requested feature (there's always one)
- Write 3 help docs or a quick-start guide
- Set up customer support (Intercom, Crisp, or even a shared inbox)
- Launch on Product Hunt, Indie Hackers, LinkedIn, and relevant communities
Your launch day checklist:
- ✅ Landing page with clear value prop
- ✅ Working signup → onboarding → core action flow
- ✅ Stripe payments accepting real money
- ✅ Basic analytics tracking
- ✅ Error monitoring active
- ✅ At least one customer support channel
What This Costs
| Phase | Cost Range |
|---|---|
| Foundation (Weeks 1–2) | $3,000 – $8,000 |
| Core Build (Weeks 3–6) | $15,000 – $35,000 |
| Polish & Payments (Weeks 7–8) | $8,000 – $15,000 |
| Beta + Launch (Weeks 9–12) | $5,000 – $12,000 |
| Total | $31,000 – $70,000 |
This assumes a small professional team. MAGEHIRE has launched SaaS products within this range — and they're still running today.
What NOT to Build in 90 Days
- ❌ Admin dashboard with analytics (use Metabase for now)
- ❌ Team management and permissions (single-user first)
- ❌ API for third-party integrations
- ❌ Mobile app (responsive web is enough)
- ❌ Custom email templates (use plain text)
These are all Phase 2 features. Build them after you have 50+ paying customers.
Want to launch your SaaS in 90 days? Talk to MAGEHIRE — we'll map out your sprint plan and give you a realistic estimate in one call.