Introducing Our Accounting for Investment Banking Guide

Introduction

Every number a banker uses starts life in a set of financial statements. The valuation, the leverage a lender will accept, the price a buyer can pay and the earnings it will report after closing all begin as lines in a 10-K, and they mean what the accounting rules say they mean.

That is why accounting opens almost every technical interview. "Walk me through the three statements" is the first question for a reason: an interviewer who hears a clean, linked answer moves on to valuation, and one who hears a loose answer stops trusting the rest.

Today we are launching our Accounting for Investment Banking Guide: 171 articles across 16 sections, from the accounting equation to purchase price allocation. It arrives with all three layers of the site: the free long-form guide, 157 practice questions in the technical bank, and a Premium interview-ready version of 20 reads.

This post explains what the guide covers, why it is written for the reader and the modeler rather than the bookkeeper, what changed in accounting over the past year, and how to use it for the interview you have coming.

The guide is ordered the way the subject is learned. It starts with the foundations and the three statements one at a time, joins them, runs transactions through them, then works through the line items, taxes, capital structure and deal accounting that sit on top.

From the Statements to the Deal

The first five sections are the core curriculum. They cover the income statement, balance sheet and cash flow statement line by line, then the links between them: net income flowing into retained earnings and the cash flow statement, depreciation and capex rolling PP&E forward, and the balance check that tells you a model or an answer is wrong. The guide's article on how the three statements link is the one to read first if you only have an evening.

The middle sections take the line items that move valuation one at a time: revenue recognition under ASC 606, inventory and working capital, PP&E and intangibles, leases, taxes, debt, stock compensation and pensions. The later sections turn to the work bankers do with those numbers: consolidation, M&A accounting, earnings quality and the industries whose statements follow their own logic.

US GAAP First, IFRS Where It Changes the Number

The guide is written under US GAAP, because that is the basis for most of the filings and models a US analyst will see. But a banker covering a European or Asian company meets IFRS on the first day, so every difference that changes a banker's figures is flagged where it arises, and the largest ones have articles of their own: leases under IFRS 16, capitalized development costs, the revaluation model, and adjusting IFRS reporters for US comparisons when you build a comps table across both.

Accounting questions appear in first rounds, superdays and modeling tests, and they come in a small number of recurring forms. Recognizing the form is half the answer.

The Five Question Types

The guide's article on how accounting is tested in banking interviews sorts the questions into five types:

Definitional questions sound easy and are where careless candidates lose credibility. Transaction questions are the core of most technical rounds, and they reward a fixed method more than speed. Judgment questions are where interviewers find out whether you understand what the numbers are for.

The Question That Never Goes Away

One transaction question has outlived every change in interview style, because it tests the link between the statements and the fact that a non-cash expense still saves tax.

The guide's walkthrough of depreciation on the three statements extends the same question to what happens when the extra depreciation is only for book purposes, which is where deferred taxes enter the answer.

Accounting Beneath Valuation and Models

Accounting is also the input to everything tested later in the interview. The enterprise value bridge adds debt, leases, preferred stock and noncontrolling interests and subtracts cash and equity investments, every one of them a balance sheet line with its own accounting. Free cash flow in a DCF is built from the cash flow statement. And EBITDA as bankers use it depends on knowing where depreciation and stock compensation sit, which many income statements do not show on their face.

The largest section in the guide, at 17 articles, is the one most interview-focused candidates will spend the most time in. It takes one transaction per article and runs it through all three statements, with an effects table showing every line that moves and a balance check at the bottom.

One Method for Every Question

Every walkthrough uses the same order, and the guide's article on answering what-happens-if accounting questions explains why it works under pressure:

The method matters more than memorized answers, because interviewers change the inputs. A candidate who learned "depreciation up $10" by rote is lost when the question becomes an inventory write-down or a PIK interest accrual; a candidate with the method is not.

The Transactions Interviewers Ask About

The section covers the transactions that interviewers actually ask about: stock-based compensation, impairments and inventory write-downs, working capital changes, deferred revenue, capex and asset sales, debt and interest, PIK interest, share issuance and buybacks, dividends, leases, deferred taxes, equity method income and acquisitions. Each one ends with the trap candidates fall into most often.

Multi-Year Scenarios

The section closes with multi-year transaction scenarios, the question format used to separate strong candidates at superdays: a company borrows to buy a machine in year one, depreciates and pays interest in year two, then sells the machine at a gain or loss in year three. Each year is simple; holding the cumulative balances in your head across all three is not.

The later sections are where the guide moves from interview mechanics to the accounting that shapes real transactions. A first-year analyst will meet all of them within months.

Income Taxes and Deferred Taxes

Taxes are the topic candidates most often skip and interviewers most often use to go a level deeper. The section explains book versus tax accounting, effective and cash tax rates, permanent and temporary differences, valuation allowances, net operating losses and the interest deduction limit under Section 163(j).

Deferred Tax Liability

A balance sheet liability for taxes a company will pay in future years because it has reported more income in its financial statements than on its tax return so far. The most common source is faster depreciation for tax than for book purposes: the company saves cash tax now and pays it back as the timing difference reverses.

Our explainer on deferred tax assets and liabilities is a good starting point, and the guide's tax section adds the parts that matter on deals: why acquired NOLs are capped under Section 382, and how a Section 338(h)(10) election changes the buyer's tax basis.

Deal Accounting: PPA and Goodwill

The M&A section follows an acquisition from signing to the first set of combined statements: the acquisition method, purchase price allocation, asset write-ups and the deferred taxes they create, goodwill and bargain purchases, earnouts, transaction costs, pro forma statements under Article 11 and the special cases of carve-outs and SPAC mergers.

Purchase Price Allocation

The process of assigning the price paid for an acquired company to its identifiable assets and liabilities at fair value, including intangible assets such as customer relationships and technology that were never on the target's balance sheet. Whatever remains after those fair values, net of the deferred taxes on the write-ups, is recorded as goodwill.

The arithmetic is simple once the order is clear: fair value the net assets, tax-effect the write-ups, and let goodwill take the rest.

The guide's step-by-step PPA article works through a full allocation, and our blog post on purchase price allocation in M&A shows where it sits in the deal timeline.

Earnings Quality and Industry Accounting

The analysis section teaches the ratios bankers compute every day, then the harder skill of judging whether reported earnings will repeat: quality of earnings, non-GAAP measures, footnote reading, segment reporting, restatements and the red flags that show up before a write-down.

Quality of Earnings

An assessment of how much of a company's reported profit is sustainable, cash-backed and correctly measured. In a deal, a quality of earnings report from an accounting firm adjusts reported EBITDA for one-time items, aggressive accounting and run-rate changes, and the adjusted figure often becomes the basis for the price.

The industry section then covers the businesses whose statements do not follow the standard template: banks, insurers, REITs, oil and gas producers, pharma and biotech, software companies, retailers and construction contractors. For each, it explains which metrics replace EBITDA and why.

Accounting questions reward method over memory: Work through three-statement, deferred tax and deal accounting questions with worked answers, start practicing interview questions for free and find out which transactions still trip you up before an interviewer does.

Accounting rules feel permanent to candidates, but the Market Intelligence section exists because they are not. Several changes from 2025 and 2026 already show up in filings, models and interview questions.

Tax Law: Bonus Depreciation, Research Costs and 163(j)

The One Big Beautiful Bill Act, signed on July 4, 2025, rewrote three tax rules that flow straight into the statements. It made 100% bonus depreciation permanent for property acquired and placed in service after January 19, 2025, which the IRS confirmed in its interim guidance in Notice 2026-11. It restored immediate expensing of domestic research costs, which had to be capitalized and amortized from 2022 to 2024. And it returned the Section 163(j) interest limit to an EBITDA-based measure, which raises the interest a leveraged company can deduct.

All three are mostly timing benefits: they lower cash taxes now and shift deferred tax balances, but leave the book tax rate largely unchanged. The guide's article on bonus depreciation and R&D expensing shows how to read that in a 10-K, and why the gap between book and cash taxes has widened at many large companies.

New Disclosures in US Filings

Two FASB standards are giving analysts more detail. ASU 2023-09 applies to public companies from fiscal years beginning after December 15, 2024, so for most companies calendar-year 2025 annual reports were the first to show the income tax rate reconciliation in both amounts and percentages, with income taxes paid split by jurisdiction, as Deloitte's adoption guide explains. ASU 2024-03 follows for annual periods beginning after December 15, 2026, and requires each major expense line to be broken into inventory purchases, employee compensation, depreciation, amortization and other costs.

IFRS 18 and the Useful-Lives Debate

Outside the US, IFRS 18 replaces IAS 1 for annual periods beginning on or after January 1, 2027. It does not change how profit is measured, but it adds required subtotals such as operating profit to the income statement and brings the company's own performance measures into the audited notes, with a reconciliation. The section also covers the global minimum tax and the debate over how long AI servers should be depreciated, a choice of useful life that moves billions of dollars of reported earnings at the largest technology companies.

The guide is built to be used at different depths, depending on how much time you have before your interviews and how much accounting you already know.

The Free Long-Form Guide

All 171 articles are free to read, with no account needed. Read the first five sections in order if accounting is new to you, and dip into the rest when a topic comes up in a case, a filing or a news story. A free five-question practice set with answers appears on every article, and articles that carry interview questions list them at the end, with the worked answers unlocked by Premium.

157 Practice Questions in the Technical Bank

The guide's 157 interview questions also sit in the practice platform's technical bank, alongside the core accounting, valuation, M&A and LBO questions. Every question links back to the article behind it, so a wrong answer leads straight to the explanation. You can practice in focused sessions, rate your own recall and track which topics are still weak.

The Interview-Ready Version

For the final stretch, the Premium interview-ready Accounting guide condenses the whole subject into 20 reads, each taking roughly half an hour and each ending with a five-question quiz. It follows the same order as the long-form guide, from the foundations and the three statements through transactions, taxes, deal accounting, earnings quality and industry accounting, and it is built to be finished in the week before a superday.

Accounting is tested in every banking interview, so the guide is written for every candidate, but it is built to work for three groups in particular.

Candidates Starting From Zero

Most banking candidates have never taken an accounting course beyond an introduction, and many have taken none. The guide assumes nothing: it starts with the accounting equation and accrual versus cash accounting, explains only as much bookkeeping as a banker needs, and builds every later section on the ones before it. The article on learning accounting for banking from zero sets out a study order by available time.

Accountants Moving Into Banking

Candidates coming from audit or transaction services know the rules better than most interviewers, and are tested differently because of it. Interviewers expect them to explain why the accounting matters for valuation and deals, not to recite the standard. The guide's deal accounting, earnings quality and modeling articles are written for that step, and our post on moving from Big 4 accounting to investment banking covers the recruiting side.

Private Equity, Credit and Research Candidates

The same skills carry beyond banking. Private equity interviewers test quality of earnings and working capital in every case study, credit investors start from cash flow and leverage, and equity research analysts spend their days in the footnotes. The analysis and industry sections are written with all three in mind.

Get the complete guide: Download our comprehensive 160-page PDF, access the IB Interview Guide covering the core technical questions and frameworks that every banking interview builds on, accounting included.

Accounting is the subject candidates most often treat as a box to tick before the "real" technical work begins, and it is the one that most often decides how that work goes. A candidate who can link the statements cleanly answers the valuation and LBO questions that follow with confidence; one who cannot spends the rest of the interview recovering.

If you only have time for one thing today, read the Accounting for Investment Banking Guide article on how the three statements link, then try the depreciation question above without looking. If you can explain every step and the balance check at the end, you are ready for the transactions section. Our blog walkthrough of the three statements answer is the natural next read.