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Flexible Retirement Planner
What it is
Flexible Retirement Planner is software for modeling retirement outcomes and estimating a plan’s probability of success. It runs 10,000 simulated paths across saving and spending phases, with Stable, Flexible, and Conservative spending policies. Users can project income and savings growth, plan withdrawals, and model taxes in detail and Social Security. Sensitivity analysis highlights which inputs affect a plan most, while the standalone version supports saving inputs and managing multiple scenarios. Its standalone app works offline, with downloads for Windows and for Mac/Linux; the Windows standalone version does not require Java. The planner is free for individual non-commercial use, and educators and trainers may use it for educational purposes. A voluntary contribution of any amount unlocks a personal-use license key. Commercial use, including by financial planners, is not authorized or supported. The license agreement cautions that the website may not always be available, secure, or private, and does not guarantee uninterrupted or error-free use.
For and against
For
- Models 10,000 retirement paths.
- Offers three selectable spending policies.
- Includes sensitivity analysis and multiple scenarios.
- Standalone software runs offline.
- Detailed tax and Social Security modeling.
Against
- Commercial use is not authorized or supported.
- Website availability, security, and privacy are not guaranteed.
The verdict
Flexible Retirement Planner combines retirement projections with scenario and sensitivity analysis, and its standalone version can be used offline. Its stated use is personal and educational rather than commercial.
Who it suits
It suits individuals exploring retirement scenarios and educators or trainers using it for educational purposes. It is not authorized or supported for commercial use, including by financial planners.
Plans and prices
Personal Edition
Non-commercial personal use · educator/training use allowed · commercial use unsupported
Read 20 Oct 2026 · flexibleretirementplanner.com
Personal use
Free for individual non-commercial use · educators and trainers may use it free for educational purposes · voluntary contribution of any amount unlocks a personal-use license key
Read 29 Sep 2026 · flexibleretirementplanner.com
On the record
- Account types
- The model separates taxable, tax-deferred, and tax-free investment balances and applies different tax treatment to each.flexibleretirementplanner.com · read 20 Oct 2026
- API and SDK
- The official documentation describes downloadable software, web tools, and code snippets but does not publish an API or SDK.flexibleretirementplanner.com · read 20 Oct 2026
- Cash-flow modeling
- Additional Inputs supports year ranges, annual amounts, taxable income percentages, and several cost-of-living adjustment methods for cash flows.flexibleretirementplanner.com · read 20 Oct 2026
- Commercial licensing
- Commercial use, including use by financial planners, is not authorized or supported by the maker.flexibleretirementplanner.com · read 20 Oct 2026
- Commercial use
- The planner is intended for personal educational use and is not authorized or supported for commercial use, including by financial planners.flexibleretirementplanner.com · read 29 Sep 2026
- Company and history
- Random Walk Ventures LLC created the planner in 2006; Jim Richmond is the company’s founder and president.flexibleretirementplanner.com · read 29 Sep 2026
- Company headquarters
- The license identifies Random Walk Ventures LLC as operating from New Hampshire, United States.flexibleretirementplanner.com · read 20 Oct 2026
- Conservative policy
- Conservative spending withholds inflation increases when the portfolio falls below its inflation-adjusted starting balance.flexibleretirementplanner.com · read 20 Oct 2026
- Default inflation limitation
- Inflation is constant by default and is not correlated with prior inflation or portfolio returns.flexibleretirementplanner.com · read 20 Oct 2026
- Documentation depth
- The site provides documentation pages covering overview, inputs, spending policies, additional inputs, settings, outputs, sensitivity analysis, source code, and further reading.flexibleretirementplanner.com · read 20 Oct 2026
- Flexible policy
- Flexible spending can rise above the original plan after strong portfolio performance and is reduced or held back in weak periods.flexibleretirementplanner.com · read 20 Oct 2026
- Founder
- Jim Richmond is identified as founder and president of Random Walk Ventures LLC.flexibleretirementplanner.com · read 20 Oct 2026
- Goal seek
- Goal-seek can search for retirement variables that achieve a target probability, but may find multiple solutions or fail to converge.flexibleretirementplanner.com · read 20 Oct 2026
- Income modeling
- Users can enter retirement income such as Social Security, pensions, annuities, or other income with a start age.flexibleretirementplanner.com · read 20 Oct 2026
- Independent classification
- An AAII Houston retirement-calculator presentation classifies the product as a Java application with high-fidelity average-return and Monte Carlo modeling and a $0-$20 cost range.aaiihouston.org · read 20 Oct 2026
- License installation limit
- A named user may install the software on up to two computers or devices.flexibleretirementplanner.com · read 20 Oct 2026
- License restrictions
- The license prohibits copying, redistribution, sublicensing, reverse engineering, and deriving source code.flexibleretirementplanner.com · read 20 Oct 2026
- Limit: commercial use
- The lack of supported commercial licensing excludes financial planners and other business users.flexibleretirementplanner.com · read 20 Oct 2026
