Build a SaaS product development roadmap with a Gantt chart. Plan MVP, beta, and v1 release phases with task ownership, dependency chains, and milestone gates.
Most SaaS product roadmaps are either too vague ("Q3: Launch payments") or too granular (every ticket from Jira). Neither is useful for the people who need to act on them.
The vague roadmap doesn't tell engineers what to build next. The granular roadmap doesn't tell investors or customers when they'll get a working product.
A Gantt chart roadmap sits in the middle: phase-level planning that shows what ships and when, with enough structure to surface dependencies and milestone gates without getting buried in implementation details.
This guide covers building a SaaS product roadmap Gantt chart from MVP through v1 release.
| Phase | Goal | Exit Criteria |
|---|---|---|
| MVP | Core value proposition working end-to-end | 5+ design partner users doing real work |
| Closed Beta | Feature completeness + stability | 20+ beta users, NPS > 30, <5 critical bugs |
| Open Beta | Scalability + onboarding | Self-serve sign-up working, documentation complete |
| v1 Release | Public launch | Billing, support, monitoring all operational |
| Post-Launch | Growth + retention | Retention metrics established, roadmap v2 defined |
Each phase has a clear goal and measurable exit criteria. Don't move to the next phase until the current phase's criteria are met. A Gantt chart milestone represents the exit criteria gate, not just a calendar date.
Open gantt-chart.io and add four milestone markers:
Place them at realistic calendar dates. Don't optimize for impressiveness — a 6-month timeline from seed funding to v1 is aggressive. Most SaaS products take 9–18 months from first code to v1.
Organize work into workstreams (not tasks):
Each workstream is a swim lane. Within each swim lane, add rows for major work chunks that span weeks, not days.
Don't try to schedule all work upfront. Instead:
This phased approach prevents the team from building billing before anyone is using the product.
Key SaaS dependencies:
Draw these arrows explicitly. They prevent "we'll add auth later" thinking.
In gantt-chart.io, each row can be labeled with an owner. Add owner tags to workstream rows. When a milestone slips, the owner is the person who needs to flag it.
Building v1 features during MVP. MVP discipline is hard. Every feature that slips into MVP delays design partner feedback and burns runway. Lock MVP scope before you start the chart.
Not gating phases on exit criteria. A beta launch date that isn't gated on NPS or retention metrics becomes a vanity milestone. Add exit criteria as notes on each milestone.
Underestimating infrastructure. "We'll fix DevOps later" creates incidents at the worst time — during beta when you're trying to impress users. Plan infrastructure in parallel with features from the start.
Ignoring legal and compliance. For B2B SaaS, customers will ask for SOC 2, GDPR compliance, or security questionnaires. These take time. Add a "compliance" row early so it doesn't blindside you at the sales stage.
Planning post-launch as empty. Post-launch is when your real product work begins. Add a "Post-Launch" phase with retention analysis, bug sprint, and roadmap v2 planning already scheduled.
Milestones
MVP Complete Month 3 ◆
Closed Beta Launch Month 5 ◆
Open Beta Launch Month 8 ◆
v1 Public Launch Month 12 ◆
Core Product
Auth + Data Model |████░░░░░░░░░░░░░░░░░░░░| Months 1-2
Core Features MVP |░░░░████░░░░░░░░░░░░░░░░| Month 3
Feature Expansion (Beta) |░░░░░░░░████████░░░░░░░░| Months 4-7
Feature Polish (v1) |░░░░░░░░░░░░░░░░████████| Months 8-12
UX + Design
MVP Flows |░░████░░░░░░░░░░░░░░░░░░| Months 2-3
Onboarding |░░░░░░████░░░░░░░░░░░░░░| Months 4-5
UI Polish |░░░░░░░░████████░░░░░░░░| Months 5-8
Help Docs |░░░░░░░░░░░░████████░░░░| Months 7-10
Infrastructure
MVP Hosting |░░░░████░░░░░░░░░░░░░░░░| Month 3
CI/CD + Monitoring |░░░░░░████░░░░░░░░░░░░░░| Months 4-5
Scalability |░░░░░░░░░░░░████░░░░░░░░| Months 7-8
Billing
Stripe Integration |░░░░░░░░░░████░░░░░░░░░░| Months 6-7 → depends on Core Product
Self-Serve Flow |░░░░░░░░░░░░████░░░░░░░░| Month 8
Growth
Landing Page |░░░░░░░░████████░░░░░░░░| Months 5-8
Launch Prep |░░░░░░░░░░░░░░░░████████| Months 9-12Review and update the Gantt chart monthly. At each review:
A roadmap that reflects reality is more valuable than one that looks optimistic.
Start your SaaS roadmap in gantt-chart.io. Add your four milestone dates first. Then build backward to understand when core product work needs to start. Share with your co-founders or board before your next planning meeting.