Your Life Operating System for Financial Freedom
FinSim is an open-source financial planning tool. Design your wealthy life for the next 30 years—not just pay less taxes today.
Everything You Need for Financial Planning
Powerful features to help you understand and plan your financial future, all without compromising your privacy.
Retirement Projections
Model your retirement with customizable assumptions. See how different scenarios affect your financial future.
Monte Carlo Simulations
Run thousands of market scenarios to understand the probability of achieving your financial goals.
Tax Optimization
Optimize your withdrawal strategy across different account types to minimize taxes over your lifetime.
Privacy First
Your financial data stays on your device. No cloud storage, no third-party access, complete privacy.
Open Source
Fully transparent codebase. Audit the algorithms, contribute improvements, or fork for your needs.
Thai Context
Built for Thai FIRE movement. Includes Thai Pension, GPF, Gold, Condo Rent vs Buy scenarios.
Documentation
Everything you need to get started and make the most of FinSim.
Getting Started
Learn how to set up FinSim and run your first financial simulation.
Core Features
Deep dive into the main features and how to use them effectively.
API Reference
Technical documentation for developers and contributors.
Simple, Transparent Pricing
Open Source model: Self-host for free forever, or use our cloud service with flexible Day Pass pricing.
Free
For users who are just starting their financial freedom journey.
- Plan Saved (Read-only)
- 1 Financial Plan
- Cash-Flow Projections
- Tax Optimization
- Export Plan as Json, Excel
- Start Your Financial Freedom Journey
Pro
For power users who plan frequently.
- Everything in Free Plan
- Unlimited Financial Plan
- Scenario comparisons
- Simulation engine unlocked
- Make Me Smile
- Cancel anytime
Day Pass
Perfect for monthly planning sessions.
- Full Pro access for 24 hours
- Pay as you go
- Perfect for monthly planning sessions
Frequently Asked Questions
Everything you need to know about pricing and features.
Ready to Take Control of Your Financial Future?
Join the community of financially-savvy individuals using FinSim to plan smarter and achieve financial freedom.