Clarity over complexity
Retirement planning tools should explain assumptions directly so decisions can be reviewed and trusted.
About
Designed to make retirement planning clearer.
401kcalc is built around one principle: better retirement decisions come from transparent assumptions, focused analysis, and calm user experience.
How we approach methodology
We prioritize conservative defaults, understandable calculations, and clear communication of uncertainty. This foundation is meant for planning, scenario comparison, and better conversations, not certainty theater.
Practical realism
Models should reflect how people actually save over time: changing salaries, contribution rates, and employer benefits.
Trust through transparency
Methodology and limitations should be visible, with no hidden logic that obscures tradeoffs.