Most retirement calculators feel like they were built by a bank trying to sell you something. They either oversimplify things to the point of being useless, or they want access to your bank accounts so they can monetize your data. RetireNumber exists because neither of those options was good enough.
What started as a side project has turned into something genuinely useful for checking in on a retirement plan every week. The engine does real math: Monte Carlo simulations, historical backtesting back to 1928, tax-aware withdrawal strategies and scenario comparison. Once it became clear how much value it provided, it made sense to open it up to everyone.
There's no company behind RetireNumber. No investors, no board meetings, no sales team. Just one person writing code, shipping features and paying for the servers. The entire business model is Pro subscriptions. That's it. Your data doesn't get sold, shared or used for anything other than powering your projections.
This project is being built in the open because that's how good software should be made. Every update gets posted to the changelog, and anyone who wants to shape what comes next can join the Discord or send a message. Thanks for stopping by!