Starting from zero · Course 3 of 11 · Before anything else
Bookkeeping from zero
Nine lessons that build one company's books from the first entry to three finished statements, with every posting checkable by hand.
Every course that follows this one divides one number on a financial statement by another. This course is about where those numbers came from.
There is no accounting background assumed and no vocabulary carried over. It starts with a single exchange between two parties and ends with an income statement, a balance sheet and a cash flow statement that a reader has built themselves.
One company, nine lessons
The worked example is a small invented business called Fen Street Bindery. It starts with no money and no equipment, raises some of each, sells some work, buys some materials, pays some wages and reaches 31 December with a set of books that balance.
Every figure in it is a round invented number, chosen so that any reader can check any posting with a pen. The same company appears in all nine lessons, and the numbers carry forward: cash at the end of lesson five is cash at the start of lesson six.
By the last lesson the same ledger, unchanged, has been rearranged into the three statements that the rest of the academy reads. Nothing new is added at that point. The statements are a presentation of a ledger that was already complete.
Why double entry, and not a list
A cash book is a list. It answers one question, which is how much money went in and out, and it cannot answer any other. It cannot tell you what you are owed, what you owe, what you own, or whether the year made a profit.
Double entry answers all of those by recording both sides of every exchange. It also builds in a check: if the two sides do not agree, something was recorded wrongly and the books say so. That self-checking property is why the method survived six centuries of commerce and is still the basis of every set of audited accounts filed with the SEC.
What this course is not
It is not a bookkeeping qualification, and it does not cover payroll taxes, sales taxes, foreign currency, inventory costing methods, consolidation or any of the standards that govern a public company's accounts. Those are later courses, and several of them have their own.
It also contains no view on any security, and no company in it is real.
How to use it
Read it with something to write on. Each lesson gives the entries and then the resulting balances, and the arithmetic is deliberately small enough to redo. A reader who posts the entries themselves and arrives at the same trial balance in lesson six has learned the subject. A reader who only reads has learned the vocabulary, which is less useful.
Vocabulary, not a verdict
Bookkeeping from zero is 9 lessons on what the words mean and how the mechanics behind them work: what you own, how a trade happens, what it costs you. That is the floor rather than the answer. This course cannot tell you whether anything you already own is worth holding, because it has read no filing of yours.
Related
- One year, two answers is the next course, and it starts from the same closed books to show why profit and cash disagree.
- The three statements and how they join reads the finished statements this course assembles, from the other direction.
- Methodology shows the same discipline applied to filed accounts: every figure traced to its statement, fiscal year and filing.
See our methodology for how the product reads a filing and what it refuses to compute.