Reference material

Resources

Books, calculators, and tools referenced throughout the Freedom System — organized by phase.

Essential reading

The Psychology of Money
Morgan Housel

The best single book on how behavior — not knowledge — determines financial outcomes. Required reading before Step 1.

Behavior
The 4 Disciplines of Execution
McChesney, Covey, Huling

The execution framework the system borrows from: one clear goal at a time, a few actions you control, and a visible way to track progress.

Execution
A Simple Path to Wealth
JL Collins

The foundational case for low-cost index investing. Backs up the investment philosophy in Steps 14–15.

Investing
I Will Teach You to Be Rich
Ramit Sethi

The automation-first approach to personal finance. Directly aligned with Step 4 and the automation layer throughout Phase 1.

Automation

Calculators & tools

Retirement
FIRECalc

Monte Carlo retirement simulator. Use to validate your FI number from Step 1.

Net Worth
Personal Capital / Empower

Free dashboard for tracking net worth across all accounts. Connects to Step 2.

Insurance
Policygenius

Term life and disability insurance comparison. Referenced in Steps 6 and 7.

Cash Flow
YNAB

Zero-based budgeting tool. Pairs with Step 3 for your cash flow reality check.

Investing
Fidelity / Vanguard / Schwab

Low-cost brokerage homes for your Roth IRA, HSA, and taxable accounts in Steps 14–15.

Debt

Our own avalanche/snowball payoff calculator — enter your debts and see your exact payoff date. Built for Step 10.

Debt
Undebt.it

Third-party payoff calculator and tracker, if you want a second option.

Key numbers to know

2026 contribution limits
IRS · updated annually

401(k): $24,500 · Roth IRA: $7,500 · HSA (family): $8,750 · HSA (individual): $4,400. Catch-up contributions available at age 50+.

Tax-advantaged
The 4% rule
Trinity Study

Withdraw 4% of your portfolio in year one of retirement, adjust for inflation annually — historically sustainable for 30+ years. Your FI number = annual expenses × 25.

FI number