Sumio Blog

Practical guides on calculating net worth, valuing assets and liabilities, and tracking personal balance sheets without linking bank accounts.

Money 101Published by Sumio2 min read

What is net worth, and why track it?

Your net worth is the current value of everything you own, minus everything you owe. Adding those balances together gives you a number you can follow over time.

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Money 101Published by Sumio2 min read

Assets and liabilities: how to count your car

A car worth $18,000 belongs in your assets. If you owe $10,000 on the loan, that balance belongs in your liabilities. Together, the car and its loan contribute $8,000 to your net worth.

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Worked example: a car's estimated value is $18,000 and its loan balance is $10,000, contributing $8,000 to net worth. The illustration excludes selling costs and taxes.
How-ToPublished by Sumio2 min read

How to calculate your net worth

To calculate your net worth, add up the current value of your assets and subtract your debts. A four-step method with current balances, debts, and currency conversion.

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Sumio guide excerpt: Use balances from the same date to calculate your net worth. Under the quote, a calendar shows September 30, 2026, as an example review date.
TrackingPublished by Sumio2 min read

Keeping a net worth spreadsheet up to date

An exchange-traded fund (ETF) keeps trading after you copy its price into your net worth spreadsheet, so check the date behind that price when you next review the total.

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Illustrated spreadsheet, using invented prices. A holding of 100 shares at a copied price of $50 is recorded as $5,000. At a later price of $54, the same holding is worth $5,400. The difference is $400.