About Calcifir

Calcifir is a retirement planner built around a simple idea — the math behind your future should be readable, accountable, and yours.

Most retirement calculators are either too simple (a single multiplication that doesn't account for taxes, sequence risk, or your partner) or locked inside expensive advisor software. Calcifir sits in the middle — a real planning tool that respects you enough to show its work.

We model the household, not the individual. We cite our research. We let you challenge every assumption. And we don't sell your data.