Business Tax Preparation · Analysis of financial records

Balance sheet (e.g., proofing beginning and ending balances, relationship to income statement and depreciation)

An income statement can be wrong on its own. A balance sheet cannot: every error has a counterparty, usually in a different account and often in a different year. That is what makes the balance sheet the more productive document to analyse, and why the IRM makes its analysis part of the minimum income probes rather than an optional refinement.

The rule

What it is. a balance sheet, or statement of financial position, presents the financial position of a business entity on a specific date — its assets, meaning the resources it owns and the future benefits it controls from past transactions; its liabilities, meaning the debts it owes; and its equity, the remaining interest in the assets after deducting the liabilities^TY2026 (IRM 4.10.3.10.1). And it reduces to one identity: the balance sheet is a detailed expression of one equation — assets equal liabilities plus equity — so equity is what is left of the assets after the liabilities, never a component of them^TY2026.

What the return requires. Schedule L reports balance sheets per books, which are required to agree with the corporation’s books and records rather than with the tax return^TY2026 (Instructions for Form 1120, Schedule L). Note what that sentence does not say: it does not require agreement with the return. There is a size exception — a corporation with total receipts — page 1 line 1a plus lines 4 through 10 — and total assets at year end each under $250,000 need not complete Schedules L, M-1 and M-2, provided the Yes box at Schedule K question 13 is checked^TY2026 — and a size escalation: a corporation with total assets of $10 million or more on the last day of the tax year files Schedule M-3 in place of Schedule M-1^TY2026.

The first question is which basis you are looking at. the first step in analysing a balance sheet is to determine whether it is tax based or book based — partnerships commonly book assets at fair market value to match the allocation rules, in which case the examiner is directed to ask for a tax basis balance sheet^TY2026 (IRM 4.10.3.10.2). The tell is a mismatch that ought not to exist: where the balance sheet is tax based, net income per books will usually not agree to Schedule M-1 line 1 or M-3 line 11 — which means not every Schedule M adjustment has been disclosed^TY2026.

Three proofs on a tax based balance sheet. the three proofs on a tax based balance sheet — net income per books agreed to Schedule M-1 line 1 or M-3 line 11, total assets and retained earnings agreed to the books, and a determination that the method of accounting clearly reflects income under IRC § 446(c)^TY2026 (IRM 4.10.3.10.2). The last of those is a substantive test, not a formality: IRC § 446(b) allows the Commissioner to compute taxable income under a method that does clearly reflect income where the taxpayer’s does not.

Which accounts get looked at. accounts selected for in-depth analysis are those with unusual titles, unusual entries within them, large numbers of adjusting journal entries, or large dollar entries concentrated in one month against the others^TY2026 (IRM 4.10.3.10.3). None of the four is about the size of the balance.

The depreciation tie. assets on the depreciation schedule carrying a prior year acquisition date are compared with the immediately preceding return; a mismatch indicates depreciation claimed on assets already expensed or already fully depreciated^TY2026 (IRM 4.10.3.10.4). This is the beginning-to-ending proof that gives the topic its name: the prior year’s closing schedule is the current year’s opening schedule, anything appearing in between must be explained by an acquisition, and anything disappearing by a disposition with a computed gain or loss.

Where omissions surface. credit balances in accounts receivable may represent deposits, advance payments or overpayments that are additional income or unrecorded sales^TY2026 (IRM 4.10.3.10.4). And the liability side carries a structural advantage: omitted Schedule M-1 items are found by analysing the balance sheet accounts, especially the liabilities, because those accounts are not themselves affected by the Schedule M-1 adjustments made on the return^TY2026 (IRM 4.10.4.2.4.2).

The records behind it. Reg. § 1.6001-1(a) requires books sufficient to establish the amounts on the return, and Reg. § 1.446-1(a)(4) includes within accounting records the data supporting the entries — which is why a detailed schedule behind a balance sheet line is not an optional extra.

Current figures

How it works in practice

Get the direction of the identity right first. Assets are what the entity has; liabilities and equity together are the claims against them. Equity is derived — total assets less total liabilities — and no item of equity is ever a liability. The commonest test gives a total for two terms and asks for the third; the commonest error is treating an unfamiliar asset as a liability.

Then ask what basis the sheet is on. A tax basis balance sheet is built from the tax treatment of each item, so its retained earnings figure carries the accumulated tax result rather than the book result — convenient for the preparer and awkward on examination, because the net income per books figure that should feed Schedule M-1 line 1 no longer matches. Where a partnership has revalued assets to support its allocations, the sheet is neither book nor tax in the usual sense.

Proof beginning to ending, account by account. Opening balance, plus what came in, less what went out, equals closing balance. Where the arithmetic works and the detail supports each movement, the account is done. Where it does not, the difference is either an unrecorded transaction or an entry made directly to the account — and direct entries with no counterpart in a journal are exactly the “unusual entries” the selection criteria point at.

The depreciation roll-forward is the highest-yield version of that proof. Accumulated depreciation at the start, plus the year’s deduction, less the accumulated depreciation removed on disposals, should equal accumulated depreciation at the end. When it does not, one of three things has happened: an asset was disposed of without a gain or loss computed, depreciation was claimed on an asset already fully depreciated or expensed, or an asset was written up. The IRM’s direction to compare prior-year-acquired assets against the preceding return catches the second directly.

Work the liabilities when you suspect the income statement. Because Schedule M-1 adjustments change the income side and leave the balance sheet accounts alone, a liability that moved without a matching income statement effect is an unreconciled item by construction. An accrued liability that appears and disappears, a loan account that grows without documented advances, a customer deposit sitting in receivables as a credit balance — each is a question about income found on the balance sheet.

The smallest returns have no balance sheet at all. Where the Schedule L exception applies, Schedules M-1 and M-2 go with it and this analysis has no material to work on — which is not an invitation to skip the reconciliation, since Reg. § 1.6001-1(a) is unaffected by whether a schedule is filed.

Scenarios

Traps

How this has changed

The accounting identity has not changed and will not. What has changed around it is the reporting structure sitting on top. Schedule M-3 was introduced at the asset threshold now stated in the Form 1120 instructions, first for Form 1120 filers for taxable years ending on or after 31 December 2004 and then extended to Form 1120-S, 1120-L and 1120-PC filers for years ending on or after 31 December 2006. It demands a far more granular reconciliation than Schedule M-1, split between temporary and permanent differences, and it made the balance sheet’s role in that reconciliation explicit rather than implied.

The examination material has moved the same way. IRM 4.10.3.10 was rewritten in 2023 to state that balance sheet analysis forms part of the minimum income probes, and IRM 4.10.3.10.2 was updated in 2016 to add the direction about partnerships carrying assets at fair market value to match their allocations — a recognition that a growing share of the balance sheets examiners see are neither straightforwardly book nor straightforwardly tax.

Nothing in the post-2024 legislation changes the balance sheet rules. The indirect effect runs through the accounts: with bonus depreciation permanent at the full statutory rate, accumulated depreciation moves faster relative to gross asset cost than during the phase-down years, making the roll-forward proof both easier to fail and more informative when it does.

Exam focus

Know the identity in the direction the question runs. Given liabilities and equity, add for assets; given assets and liabilities, subtract for equity. Expect at least one question that is really a classification test wearing an arithmetic disguise.

Name the three elements as the IRM defines them — resources owned and future benefits controlled, debts owed and obligations to transfer, and the residual interest.

For the return, remember Schedule L reports book balances, that the size exception has two limbs and takes M-1 and M-2 with it, and that the Schedule M-3 threshold is separate.

The proofing material is most likely to appear as a computation. Practise the depreciation roll-forward until it is automatic — opening accumulated depreciation, plus the year’s deduction, less accumulated depreciation on disposals, equals closing — and know what each failure mode implies.

Finally, keep the direction of inference in mind: balance sheet accounts are not adjusted by Schedule M-1, so they are where an omitted Schedule M-1 item can be found. That is why the IRM directs examiners to look at the liabilities when they suspect the income statement.

Check yourself

1. A balance sheet shows liabilities of $55,000 and shareholder equity of $100,000. What are total assets, and what would change if $12,000 of the equity were reclassified as a note payable to the shareholder?

Answer: Total assets are $155,000 — assets equal liabilities plus equity. Reclassifying $12,000 from equity to a note payable changes nothing about total assets: liabilities become $67,000, equity $88,000, and the sum is still $155,000. What changes is everything else — the payment becomes interest rather than a distribution, IRC § 7872 applies if the note is below-market, and the shareholder’s basis moves. The identity is indifferent; the tax result is not.

2. A corporation’s Schedule L shows retained earnings rising by $180,000 while Schedule M-1 line 1 reports net income per books of $205,000, and no distributions were made. What should the preparer be able to explain?

Answer: The $25,000 difference. On a book basis balance sheet with no distributions the two should move together, so either an entry was posted directly to retained earnings — a prior period adjustment, a correction, an equity transaction — or the balance sheet is on a tax basis, which IRM 4.10.3.10.2 treats as an indication that not all Schedule M adjustments have been disclosed. The required response is a reconciling schedule, which Reg. § 1.446-1(a)(4) already obliges the taxpayer to maintain.

3. Accumulated depreciation opens at $880,000 and closes at $1,020,000. The depreciation deduction is $190,000 and the return reports no dispositions. What has happened?

Answer: $50,000 of accumulated depreciation has left the account — $880,000 plus $190,000 is $1,070,000 against a closing figure of $1,020,000 — and the only ordinary way for accumulated depreciation to decrease is a disposal. Since the return reports none, either a disposal went unreported, in which case the gain or loss and any IRC § 1245 recapture are missing, or an asset was written down or removed by a direct entry. Either way the roll-forward has identified an item the income statement does not contain.

4. Why does the IRM direct examiners to look for omitted Schedule M-1 items in the balance sheet accounts, and why especially in the liabilities?

Answer: Because Schedule M-1 adjustments are made on the return and are not part of the taxpayer’s double-entry system, so they do not touch the balance sheet accounts at all. A liability that moved without a corresponding income statement effect cannot have been absorbed by an M-1 adjustment, and points to an item reported in one place and not the other. The IRM adds that because Schedule M-1 sits outside the normal accounting controls, errors on it — double deductions, transpositions, netted line items — are frequent.

5. A partnership’s balance sheet carries its real property at appraised value. What should the preparer expect an examiner to ask for, and why does it matter?

Answer: A tax basis balance sheet, which IRM 4.10.3.10.2 directs the examiner to solicit where a partnership has booked assets at fair market value to coincide with the allocation rules. It matters because a balance sheet on appraised values cannot support any of the three proofs: retained earnings will not tie, the depreciation roll-forward will run on a basis the return does not use, and total assets will not agree to the books in the tax sense. The revaluation may be entirely proper for allocation purposes and still leave the return’s schedules unverifiable without a second version.