Where this comes from
Fourteen years in multinational finance environments teach you something textbooks do not cover: the gap between financial literacy and financial decision-making is enormous, and it does not close just because someone earns more or holds a senior title.
Double Entry Life is built on a precise observation. Accounting already has a word for everything that feels confusing in personal finance. Depreciation, accruals, sunk cost, the difference between cash flow and income: these are not abstract. They describe what is already happening in people's financial lives, whether or not they have the vocabulary for it.
What this site is
Double Entry Life runs on two tracks, each with its own rules.
The first is Bill's ledger. It is not a blog. It follows one fictional life with real accounting, so that a salary, a lease or a purchase on instalments can be read the way a company reads its own numbers.
The system has been running since April 2024. FY 2024 was a short year, nine months, opening the books. FY 2025 ran the full calendar year under the going concern principle. FY 2026 is the restatement: three years of data, one open ledger. A new episode is published every two weeks, alternating with the blog, so something new comes out every week. Every episode is listed in order in the Ledger, and Meet Bill is the place to start.
Why Bill
A fictional character with precise, stable numbers allows the accounting logic to be the variable. Bill's salary, savings, lease and debts do not change between episodes unless an episode event explicitly changes them. His net worth is a derived value, not an assumption. Every number is traceable to a specific EP.
Bill is not aspirational and he is not a cautionary tale. He started with 1,000 euro and a degree. Today he earns 1,740 net and wonders if the trajectory is right. The ledger knows. He is starting to learn how to read it.
Why accounting
Personal finance content tends to cluster around two modes: motivational frameworks with no numerical precision, and spreadsheet tutorials with no human story. This system does neither. The accounting concept is the frame. Bill's decision is the content. The ledger is the evidence.
The blog
The second section is the blog. It is open space for general considerations on company accounts, listed or not, read through accounting. It has no episode numbers and no fiscal year, and a new piece comes out in the weeks between Bill's episodes.
The blog is separate from Bill. It does not touch his numbers, and his ledger does not draw on it. When a post uses figures from a real company, they come from its published accounts and the source is named. When a case is illustrative, with round numbers, the post says so.
Each piece is published in the same form on the site and on Substack, and shared on LinkedIn. The site is the system of record.
About the author
Biagio Tozzo is a Senior Accounting Manager with 14 years of experience in multinational finance environments. Double Entry Life is a personal project, not affiliated with any employer.