What is net worth?
Net worth is everything you own minus everything you owe. It is the simplest snapshot of your financial position and a useful number to track over time.
What counts toward your FIRE number?
FIRE planning usually focuses on investable assets that can produce income or be sold to fund spending. ISAs, taxable investments, cash, and accessible portfolio assets count more directly than your home or pension money you cannot access yet.
Liquid vs total net worth
Total net worth includes property and pensions. Liquid net worth is easier to access and excludes assets such as your home. For early retirement, liquid and investable net worth often matter more than the headline total.