SaaS MVP Development Timeline: Week by Week (What Actually Happens)
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MVPMay 1, 20268 min read

SaaS MVP Development Timeline: Week by Week (What Actually Happens)

Week 4 is always harder than week 2. Week 8 is always harder than week 6. Here's why.

The Real Timeline

Week 1-2: "This is going great!"

Week 3-4: "Wait, that's harder than we thought."

Week 5-6: "Everything is on fire."

Week 7-8: "Actually, maybe we can launch."


Week by Week

Week 1: Discovery & Setup

Days 1-3: Finalize requirements Days 4-7: Architecture decisions, repo setup, tech stack

What goes wrong: Requirements keep changing What to do: Lock requirements. No changes without scope discussion.

Week 2: Core Feature (First Pass)

Days 1-5: Build the core feature Day 5: First deployment to staging

What goes wrong: "This is taking longer than expected" What to do: Core feature scope is sacred. Don't add features.

Week 3: Authentication & Payments

Days 1-3: User auth (signup, login, password reset) Days 4-5: Stripe integration

What goes wrong: Stripe edge cases. Webhook failures. What to do: Test payment flows extensively. Edge cases take time.

Week 4: Dashboard & Polish

Days 1-4: Build main dashboard Day 5: User testing with 3-5 users

What goes wrong: "Users don't understand it" What to do: Watch users struggle. Fix UX problems immediately.

Week 5: Email & Notifications

Days 1-3: Email templates, notifications Days 4-5: Testing, bug fixes from user testing

What goes wrong: Emails go to spam. Notifications are confusing. What to do: Test with real email providers. Keep notifications minimal.

Week 6: Edge Cases & Errors

Days 1-3: Error handling, loading states Days 4-5: Mobile responsiveness

What goes wrong: Edge cases everywhere What to do: This is always longer than expected. Budget extra time.

Week 7: Testing & QA

Days 1-4: Full testing pass Day 5: Bug fixes

What goes wrong: More bugs than expected What to do: Two-week budget for every bug. Some never get fixed.

Week 8: Launch

Days 1-2: Final polish Days 3-4: Soft launch (waitlist) Day 5: Public launch

What goes wrong: Launch day panic What to do: Nothing new. Only fixes. Ship it.


The Hard Truth

Week 4 and Week 8 are always hardest.

Week 4: Reality sets in. Scope looks different. Users struggle.

Week 8: The product is almost ready. Temptation to add more is highest.


How to Survive

  1. Budget 20% extra time for everything
  2. Watch users weekly (not just at the end)
  3. Lock scope at Week 2 (no additions)
  4. Accept "good enough" over "perfect"
  5. Communicate early about delays

MVP timelines aren't predictable. But they're survivable.

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