The right time to quit is when your start up is making more than your current job. You should start now and likely not quit unless you are making good money from your business. I did the whole save and quit to work on a startup but basically spent all my money, only worked on coding, and didn’t develop the sales skills needed to get it done. Startups are sales games, so don’t quit your job until you have proof you can win at sales (which likely won’t have a strong dependency on the quality of your product)