About Coast FIRE Planning

Free tools to help you plan when you can stop saving.

Coast FIRE Planning is a free website that helps people see when they can stop saving for retirement and let compound interest take over, so they can spend more time living.

The Coast FIRE Calculator estimates your FIRE number (how much you’d need to retire), your Coast number (how much you’d need today for compounding to finish the job), and the year you could stop adding new savings. It works for one person or a couple.

The Next-Dollar guide walks through a commonly cited order for where to put the next dollar you save — employer match, health savings account, Roth or backdoor Roth IRA, workplace plan, then a regular brokerage account — using tax-year 2026 IRS limits. It shows dollar amounts and the reasoning for each step.

Both tools are free, with no login. Your numbers stay in this browser and, if you want, in the page URL so you can bookmark or share a scenario. Nothing is sent to a server.

These tools are educational. They are not investment, tax, or legal advice, and they do not recommend specific securities or that you open an account with any particular company.