How Long Does It Take to Build a SaaS App?

Real development timelines for B2B and B2C SaaS applications.

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Week-by-week timeline

Architecture & design

Week 1

✓Multi-tenant data model (RLS policies)
✓Auth flow with invites
✓Stripe Billing plan structure
✓Core UI and dashboard design

🏁 Approved architecture and designs

Core SaaS features

Weeks 2–3

✓Multi-tenant auth and workspace
✓Core product features
✓Stripe Billing integration (plans, trials, upgrades)
✓Team invites and roles

🏁 Functional SaaS on staging

Production readiness

Weeks 4–5

✓Feature flags per plan tier
✓Email transactional setup
✓Onboarding flow
✓Admin panel
✓Production deployment + monitoring

🏁 Live SaaS product

What affects the timeline

Multi-tenancy from day one

The biggest SaaS architecture decision is data isolation. We implement Row Level Security in Supabase from day one — retrofitting it later costs 2× a fresh build.

Billing complexity

Flat rate plans: 1–2 days. Usage-based billing with metering: 3–5 days. Custom enterprise pricing with contracts: 1–2 additional weeks for negotiation flow.

Number of plan tiers

Each plan tier requires feature flag logic, upgrade/downgrade UX, and billing proration handling. 3 tiers is standard — 5+ tiers add a week of testing complexity.

SSO and enterprise features

SAML SSO via WorkOS: 2–4 days. Audit logs: 2–3 days. These are must-haves for enterprise sales — build them early if enterprise is your target.

Timeline comparison

Option	Timeline	Notes
Our agency (focused scope)Us	3–5 weeks	Core SaaS with multi-tenancy and Stripe Billing
Freelancer	3–6 months	Slower, higher risk of architectural issues
SaaS boilerplate (Shipfast, etc.)	1–2 weeks for setup	Starter, then custom development needed
In-house senior team (2–3 devs)	2–4 months	Hiring first, then 6–8 weeks of build

Frequently asked questions

Do you build multi-tenant from day one?

Always. Single-tenant-first is the #1 technical debt trap in SaaS. Our Supabase + RLS architecture enforces tenant isolation at the database level from the first commit — not retrofitted later.

How do I handle trials in Stripe Billing?

Stripe's built-in trial system handles this: create a subscription with trial_period_days, charge the card at trial end. We configure the trial UX, trial reminder emails, and trial-to-paid conversion flow as part of every SaaS build.