Add what you own and owe, then save a snapshot each month and watch the line climb. Everything stays private in your browser.
Net worth, everything you own minus everything you owe, is the single best number for tracking financial progress. Budgets tell you about this month; net worth tells you the direction of your whole financial life. Watching it climb each month is more motivating than any spreadsheet of expenses.
Update it on the same day each month (payday works well). Include pensions, they're often the biggest asset. Don't chase a perfect figure; consistency beats precision.
Prefer a spreadsheet you can keep forever? Download the free .xlsx tracker (Excel & Google Sheets).
For your own tracking, not financial advice. Figures you enter stay in your browser's local storage and are never transmitted. Clearing browser data removes them. Use realistic current values (home value, outstanding mortgage).