treasury21.co · BTC · MSTR · STRC · Treasuries

Retire early on your own terms.

Free calculators for people holding Bitcoin, MSTR and STRC. Start with the SEPP planner to see how much you need to pay yourself before 59½, then plan the whole retirement.

Start here

SEPP Planner

Enter the take-home income you want. See the 72(t) SEPP account you need, the lock-in, and what a dividend cut does to it.

Open the planner → Plan the descent

Flight Plan

Phase-based drawdown with an STRC + SEPP bridge, tax buckets, stress tests, Monte Carlo and a sustainable-spend solver.

Open the flight plan → Watch the portfolio

Wealth Dashboard

BTC, MSTR, MSTY, STRC and Treasuries to 2045 on the Bitcoin power law, with bear, base and bull cases and a withdrawal and tax view.

Open the dashboard →

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