A SaaS service begins when a product gives customers a reason to return regularly. Before focusing on plans and billing, confirm that it solves a recurring problem in a clear way and that users can reach an outcome without constant help from your team.
Map the customer’s path from the first visit to the first successful result: how do they create an account, what information do they need, and how do they know setup is complete? Reducing friction at this point speeds learning and lowers support requests.
Technically, consider tenant boundaries, user permissions, backups, change history, and incident monitoring early. You do not need a large infrastructure on day one, but protecting customer data should not require a complete redesign later.
Release a focused scope to an appropriate group of users. Observe actual usage, recurring questions, and points where people stop. Use that evidence to prioritize improvements instead of adding features only because they sound attractive.
Being ready for SaaS means being ready to deliver recurring value and dependable operations, then improve the experience with every cycle of use.