SquirrelPlan review
A private, browser-based planner for modeling savings, retirement timing, and withdrawals.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
SquirrelPlan is a browser-based personal finance and retirement planning tool for people who want to model their financial future without sending plan data to a backend server. Users enter assets, liabilities, income, expenses, savings allocations, and retirement assumptions. The tool then presents wealth projections as charts and tables, with options for early-retirement scenarios, inflation settings, and withdrawal rates. Its open-source approach and browser-local storage make it a fit for people who value private, self-directed planning and are comfortable supplying their own inputs.
Projection methods are a central strength. A deterministic projection applies user-provided rates, while Monte Carlo simulation randomizes annual asset returns to show another view of possible wealth evolution. Users can also set savings allocation strategies for different life periods and adjust investment withdrawal rates. These tools support scenario analysis, but the resulting projections are models based on the assumptions entered; they should not be mistaken for a tax-aware or account-fed financial picture. SquirrelPlan does not describe tax modeling, so people who need tax effects built into retirement estimates should look for a planner with that capability.
The browser-based design keeps plan data local rather than sending it to a backend server, and JSON import and export offer a way to move planning data in and out. The published feature set also includes multi-language support. On the other hand, account synchronization is not supported, so users must enter and maintain their own financial information. SquirrelPlan suits open-source users seeking private, basic projections and control over assumptions. It is less suitable for people who want connected account balances or tax modeling as part of a retirement plan.
SquirrelPlan pros and cons
- Where it wins
- Models deterministic and Monte Carlo wealth projections
- Supports early-retirement scenarios and withdrawal settings
- Stores data in the browser and supports JSON import and export
- Where it doesn't
- Does not describe tax modeling
- Does not support account synchronization
- Projections rely on user-provided assumptions and return rates
SquirrelPlan fact sheet, pricing and score →
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