Building a SaaS product from scratch involves far more than a website with a login. Here's a realistic, stage-by-stage cost breakdown from idea to Series A-ready platform.
SaaS is the dominant software delivery model — but 'build a SaaS' covers an enormous range: from a simple B2B tool to a multi-tenant enterprise platform with SSO, role-based access, and a marketplace. The cost difference between these extremes is 10x. Let's break it down properly.
The Hidden Complexity of SaaS Architecture
Unlike a one-sided consumer app, SaaS products need multi-tenancy (data isolation between customers), subscription billing, usage metering, admin portals, audit logs, and security hardening from day one. These aren't features — they're infrastructure. Underestimating them is the most common reason SaaS projects run over budget.
Cost by Stage
| Stage | Description | Timeline | Cost Range |
|---|---|---|---|
| Discovery & Architecture | Requirements, system design, tech selection | 2–4 weeks | $5,000–$15,000 |
| MVP | Core functionality, one user tier, basic billing | 2–4 months | $30,000–$80,000 |
| Version 1.0 | Full feature set, onboarding, analytics, API | 4–8 months | $80,000–$180,000 |
| Enterprise-Ready | SSO, RBAC, compliance, SLAs, multi-region | 8–16 months | $200,000–$500,000+ |
Subscription Billing: Don't Build It Yourself
Stripe Billing, Chargebee, or Recurly handle subscription logic, proration, metered billing, and tax compliance. Building this from scratch adds $20,000–$50,000 to your budget and creates ongoing maintenance debt. We always recommend a proven billing platform.
First Code Technologies has built SaaS platforms from idea to $10M ARR. Our team brings architectural experience from enterprise software — so your MVP is designed to scale, not rebuilt when you need to.
Arjun Mehta
Head of Product, First Code Technologies
Published November 10, 2025
