Learning objectives
By the end of the week you can:
- Recite and apply the ten ties (the specific lines where the three statements bolt together) and mark every one of them on a real filing in under ten minutes.
- Trace any single transaction through all three statements (a "cascade") in under three minutes, with the balance sheet balancing at the end, including the classic interview walk: "$10 of depreciation at a 30% tax rate."
- Build three fully-linked statements from a blank sheet, given an opening balance sheet and a year of assumptions: income statement, cash flow statement, closing balance sheet, and the four roll-forward schedules (cash, retained earnings, PP&E, debt) that drive them.
- Run the working-capital sign logic without memorizing: derive "asset up, cash down; liability up, cash up" from first principles and apply it to any balance-sheet delta.
- Explain the D&A triple path, the SBC triple entry, and the capex → PP&E → future-D&A chain, including where each item hides on real Indian and US filings.
- Explain the revolver–interest circularity (why linked models contain a genuine simultaneous equation) and describe the three standard ways models break it, with the trade-off of each.
- Re-present the same cash flow statement under US GAAP and Ind AS conventions and adjust reported CFO so an Indian and a US company are comparable.
- Debug a non-balancing balance sheet systematically: from the size and pattern of the imbalance, identify whether you dropped a tie, flipped a sign, or broke a roll-forward.
Prerequisites & connections
Builds on. M1.01 (double-entry: every transaction has two or more legs, articulation is that fact scaled up), M1.02 (the P&L layers down to net income), M1.03 (the classified balance sheet and the full equity build, including the statement of changes in equity), M1.04 (CFO/CFI/CFF, the indirect method, and the GAAP/IFRS/Ind AS classification differences, reused heavily here).
Feeds into. Everything, literally: M1.06–M1.09 deepen individual lines but always hang them back on this skeleton (each of those modules ends by asking "and where does this flow?"). M1.10's capstone, hand-spreading a full 10-K and an Indian annual report, is this same articulation executed on real filings. M2.03 (ROIC) and M2.04 (FCF) are built from lines you'll now know the plumbing of. M2.06–2.07 (shenanigans) work because manipulation in one statement must distort another: the linkage is the forensic tripwire. M3.08 (the 3-statement model) is this week's skill with formulas instead of pencil. And the five-questions spine starts with "what does it do and how does it make money?", a question you answer by following money through these three documents.
In one sentence: the three statements are not three reports; they are three views of one ledger, and the seams between the views are load-bearing.
4.1 One ledger, three projections: why articulation is arithmetic, not convention
Start from what you proved to yourself when you first learned double-entry: every transaction touches at least two places, and at all times Assets = Liabilities + Equity. A company's year is just thousands of such transactions posted to one ledger. The three statements are three different summaries of that single ledger:
- The balance sheet (BS) is a photograph: the level of every stock (cash, receivables, machines, debt, equity) at one instant. You get one at the start of the year and one at the end.
- The income statement (IS) is a video of one slice of the ledger: it explains how operations changed owners' wealth during the year. Mechanically, it explains the change in retained earnings, before distributions to owners.
- The cash flow statement (CFS) is a video of another slice: it explains the change in exactly one balance-sheet line, cash.
That framing is the whole picture in miniature. Two photographs, and two videos each explaining the movement of one account between the photographs. Everything else on the balance sheet (receivables, inventory, PP&E, debt, the equity reserves) moved too, and the videos must account for those movements as well, because cash and profit are connected to them: a sale you haven't collected raises receivables instead of cash; a machine you bought consumed cash without touching profit. So the statements cannot help but interlock. Articulation (the accountant's word for the statements tying to each other) is not a design choice someone made. It is the arithmetic consequence of double entry. If your three statements don't tie, you have not discovered an exception; you have made an error. This is why the balance check at the bottom of every model you will ever build (Assets − Liabilities − Equity = 0) is a genuine proof of internal consistency, and why analysts trust a model that balances and instantly distrust one that doesn't.