How It Works

Banking Judgment Lab publishes case drills — short composite commercial banking situations presented in a fixed format: setup, the data on the table, a four-option judgment question, the senior banker's read, and the closing. New drills are added as they are ready.

A drill is designed to be read in about six minutes and remembered in seven seconds. The six-minute read is for understanding the specific case. The seven-second residue is what stays — a diagnostic shape, a phrase, a structural question that lodges in the back of a banker's instinct and surfaces six months later when they're reading a different file.

Drills are free. They will always be free. There is no archive paywall, no expiring access, no signup required to read them. The back catalogue stays open, and every published file can be downloaded as a spreadsheet to work on your own.

The Lab publishes three interactive tools, all free, none with a signup:

The Three Diagnostics is a calculator that takes a borrower's basic financial inputs (revenue, EBITDA, operating cash flow, DSO, DPO, inventory days — both this year and prior year) and returns what a senior banker would read in the numbers. It applies the Three Diagnostics framework from Chapter 3 of How Bankers Think, but runs in sixty seconds rather than reading time.

The Interview Quiz is a self-assessment for candidates preparing for bank interviews, in four rounds of five questions: credit and lending; the front line; risk, compliance and audit; and finance, technology and operations. Each question has four options. After picking yours, the senior banker's read appears — explaining why that choice is the senior choice and why the other answers signal what they signal.

The Five-Step Read faces the other chair. A business owner enters six numbers from their own business and sees them walked through in the order a credit reader actually goes — and where the file snags first. Nothing entered leaves the page.

All three tools are designed to be useful in a single sitting, not to become daily-habit products. None keeps a score of you. Without an account, nothing about a run follows you anywhere; a signed-in member's record keeps the calculator's verdict and the quiz's five answers, and never the figures typed into either calculator.

The newsletter is one letter per drill, delivered to inbox the morning a new drill publishes: the same case, the same numbers and the same question as the website. The senior banker's read is not in the letter — it opens on the site, once you have answered, so the letter never gives the answer away before you have made the call.

It is free, and the unsubscribe link is at the bottom of every email. The Lab does not share email addresses with anyone. It does not run cross-promotions, sponsorship slots, or affiliate recommendations in the newsletter — what's in the newsletter is what's on the website.

If a reader stops finding the material useful, the right move is to unsubscribe. The Lab would rather have an engaged reader of one hundred than a forgotten reader of one thousand.

Answer a drill and your call is kept in this browser, next to the senior banker's. Open a free account and that record follows you — sign in from any browser and every judgment you have made is there.

Membership also earns coupons: a credit for joining, one for every drill you judge, and more for turning up week after week and for finishing a season of twelve issues. Coupons claim things from the Lab Vault outright — a claim is the whole product, never a discount on it. One of those things, the member case, is not sold at any price; the only way to hold it is to have done the reading.

There is no password — a six-digit code or a Google sign-in, and nothing else. Opening an account does not put you on the newsletter, the address is held encrypted and never sold, and every drill stays free to read, signed in or not. There is no leaderboard and members are not scored against each other; the senior banker's read is the only comparison this site will ever make.

The Lab is written for four readers:

Finance students preparing for commercial banking interviews — particularly those targeting credit-focused or relationship-banker roles, where the entry test is whether they can read a borrower's file the way the senior banker on the panel reads it. The drills and the Interview Quiz are calibrated for this reader.

Junior bankers in their first eighteen months on a commercial book — who have done the technical training but are still building the instinct that distinguishes a strong analyst from a banker. The drills and the Three Diagnostics calculator help shorten the calibration period.

Finance professionals who work alongside commercial banks: lawyers structuring facility documents, accountants preparing borrower information memoranda, corporate executives presenting to their bank for the first time. For this reader, the Lab is diagnostic from the other side of the table — what does the banker on the receiving end of your pitch actually look at, and what makes them lean in versus pull back.

Anyone who wants to know how a bank works from the inside — the rooms a loan passes through, and who sits in each one. For this reader, the Lab is a walk through the building rather than a test.

Four readers. Different angles on the same question: how does a commercial banker form judgment, and how do you tell when that judgment is actually being formed (versus when the bank is just running a checklist).

There are no daily emails, no paywalled tier, and no breaking-news alerts — what membership adds is earned with reading, never bought. Each drill is written to be substantive rather than repetitive.

The Lab does not ask for engagement metrics, completion percentages, or commitment statements. A reader who skims one drill in twelve and learns one thing has done what the Lab is for. A reader who reads every drill and submits judgment on each will get more — but the model is not built around either of those profiles.

What the Lab does ask is intellectual honesty when reading the cases. The drills work as a test of the reader's own banking instinct against the senior banker's read — and the test only works if the reader actually picks an answer before scrolling to the senior's response. Treating the cases as scrollable prose rather than as structured judgment exercises gets some of the value but not most of it.

Most of the Lab is free, indefinitely. Every drill, every diagnostic tool, the newsletter — all free, no signup walls, no expiring trials. So are the two things you can take away: each published drill's file as a spreadsheet, and the sample credit paper as a PDF.

The Lab Vault publishes deeper resources for readers who want them: industry-specific Banking Toolkits (PDF + Excel diagnostics, from US$19 each) and standalone Case Packs (multiple worked cases at greater depth, from US$39).

The Lab Vault is for readers who have already found the free material useful, and want a deeper version they can keep, print, and use offline. It's not gated content; it's a different product. Buying one doesn't unlock anything else; not buying doesn't gate anything else. The free content stays free.

The simplest way to think about it: the website is the Lab. The Vault is the bookshop attached to the Lab. Anyone can visit the Lab without ever stepping into the bookshop. Today everything in it is a single purchase — one book at a time, priced on its own cover.