The Auditor Adds Up Every Deposit

Published: August 10, 2026 · Reading time: 12 min

TL;DR: Every other post in this category is about proving what you spent. This one is about what arrived, and the rules are far less forgiving. Under IRM 4.10.4, an examiner can skip your books entirely and total the deposits in every account you maintain or control — the IRM's own formula reaches your business and personal accounts, your spouse's accounts, and your dependent children's accounts — then subtract only what you can prove was nontaxable. The IRM's list of what comes out: gifts, inheritances, loan proceeds, transfers between accounts, checks to cash redeposited, tax-exempt interest, insurance proceeds, federal tax refunds. Whatever is left is gross receipts. The Cohan rule cannot help you — it estimates deductions, and here nothing is being estimated. §7491(a) moves the burden to the IRS only if you substantiated, kept all required records and cooperated. And the cash-on-hand question in the opening interview is not small talk: the IRM tells examiners to nail it down early so the "I had savings" answer cannot be used afterwards.

The corpus is full of guides to proving expenses: what makes a receipt IRS-valid, bank statements versus receipts, the Cohan rule when receipts are lost.

Every one of them is about the deduction side of the return, because that is where freelancers expect the trouble. The income side has a method of its own, it is written down in the Internal Revenue Manual, and almost nobody outside the profession has read it.

The method, in one formula

The Bank Deposits and Cash Expenditures Method is one of several formal indirect methods in IRM 4.10.4. It does not audit what you reported. It builds gross receipts from scratch:

The IRM is explicit that this determines gross receipts from all sources — it is not limited to business receipts, and the examiner does not have to audit or verify the expenses you deducted to run it. That is exactly why it appeals when records are thin: it sidesteps your bookkeeping instead of arguing with it.

The IRM's own definition of what counts as a deposit is where the scope opens up:

Total deposits include amounts deposited from both taxable and nontaxable sources to all bank/financial accounts (both business and personal) maintained or controlled by the taxpayer, as well as deposits made to accounts in savings and loan companies, investment trusts, brokerage houses, credit unions, and other financial institutions.

And the explanation of the formula's first line goes further:

This includes the taxpayer's business and personal accounts, the spouse's accounts, and dependent children's accounts.

The IRM says plainly why: if the analysis is limited to business accounts only, omitted taxable income in personal accounts may not be discovered.

When it gets used — and the statutory limit on it

Not only in fraud cases. The IRM builds a bank account analysis into the ordinary minimum income probe for individual business returns, so an examiner has already compared deposits to reported receipts before deciding whether to escalate.

But a formal indirect method is not something an examiner may reach for on a hunch, and this is the one protection in the area worth knowing by name. §7602(e):

The Secretary shall not use financial status or economic reality examination techniques to determine the existence of unreported income of any taxpayer unless the Secretary has a reasonable indication that there is a likelihood of such unreported income.

The IRM quotes that provision at itself and repeats the constraint in its own terms: formal indirect methods are appropriate when the books and records are missing, incomplete, or irregularities are identified, or when the financial status analysis indicates a material imbalance of cash flows after accounting for other adjustments found in the examination. So the predicate has to come first. Triggers include:

• Inadequate or missing records — no books to audit
• A financial status analysis suggesting the household spends more than it reported earning
• A cash-intensive business
• Deposits materially exceeding reported gross receipts on the routine probe
• Reported receipts that do not reconcile with the 1099-K and 1099-NEC forms third parties filed about you

What comes out of the total

The IRM's nontaxable list is your defence, and it is worth memorising because it is finite:

Notice what every row has in common. The category is never the hard part. Nobody disputes that gifts are not income. The hard part is being able to show, three years later, that this particular $5,000 was one.

A deposit you cannot characterise is gross receipts. That is the whole exposure.

Why the Cohan rule cannot save you here

The corpus's Cohan guide explains the rule: where a taxpayer clearly incurred a deductible expense but cannot fully document it, a court may allow a reasonable estimate — outside the categories §274(d) governs, where estimation is barred outright.

Cohan is a rule about deductions, and it begins from a fact everyone agrees on: the expense happened. The court is estimating an amount.

An unexplained deposit inverts both halves. Everyone agrees the money arrived; the disputed fact is its character. There is no amount to approximate and no principle that resolves ambiguity in your favour.

That last row is why this matters more than the receipt drawer. A disallowed $4,420 deduction and $4,420 of added gross receipts are not the same size.

§7491 does not rescue you either — unless you already did the work

Taxpayers sometimes assume the IRS bears the burden of proving unreported income. §7491(a)(1) does shift the burden of proof to the Secretary where a taxpayer "introduces credible evidence with respect to any factual issue" — but §7491(a)(2) attaches three conditions, all of which must hold:

• (A) the taxpayer has complied with the requirements … to substantiate any item
• (B) the taxpayer has maintained all records required under the title and has cooperated with reasonable requests for witnesses, information, documents, meetings and interviews
• (C) the entity-level requirement, which for a sole proprietor filing Schedule C is not in issue

Read (A) and (B) again in the context of an audit that started because the records were inadequate. The burden-shifting provision is available to the taxpayer who kept records and lost an argument. It is structurally unavailable to the taxpayer who did not keep them — which is the same taxpayer the bank deposits method is aimed at.

Underneath it all sits §6001, which requires every person liable for tax to keep such records as the Secretary prescribes. The reconstruction is the consequence of not doing that, not a punishment layered on top of it.

The interview question that decides your best defence

This is the part that costs people the most, and it happens in the first hour.

An examiner will ask how much cash on hand you had, and how much in accumulated funds. It sounds like scene-setting. IRM 4.10.4.5.8.3 explains what it actually is:

The after-the-fact "cash in the mattress" defense cannot be used if the actual cash-on-hand and accumulated funds have already been established.

The IRM directs examiners to pin the number down during the initial interview, before any indirect method is chosen, precisely so that a later explanation cannot expand to fill the gap. It even coaches on technique: if a taxpayer is evasive, start with "over or under $10,000" and narrow the range until they agree.

Two terms, defined differently, and worth knowing before you are asked:

• Cash on hand — undeposited currency and coins used for normal business transactions
• Accumulated funds — cash accumulated by the taxpayer that is not associated with normal business practices or customer transactions. It may have been taxed in prior years, come from a nontaxable source, or be taxable income of the year under audit

The right answer is the true one, given carefully, after understanding which term is being asked about. A casual guess — "I don't know, a few thousand?" — becomes an established fact that caps a defence you may need later.

The IRM also names the other two defences, so you know what is available: that the computation itself is inaccurate or flawed, and that the difference came from a nontaxable source. On the second, the IRM tells examiners that if all nontaxable sources have been considered and eliminated, the remaining likely source is a taxable one — so a defence that names a specific source with a document behind it works, and a general assertion does not.

A worked reconciliation

Tomas is a freelance photographer. He reported $84,000 of gross receipts. He has a business checking account, a personal checking account, a joint savings account with his wife, and her separate checking account.

Total deposits across all four accounts: $186,700.

That number, standing alone, looks like a $102,700 problem. Here is what it actually is:

Note what did the heavy lifting: $80,400 of the $102,700 gap — 78% of it — was transfers and a spouse's wages — money that was never Tomas's business income and, in the case of the wages, was already reported on someone's return. Neither is a subtle argument. Both are simply impossible to make without statements in hand.

Now the $4,420. Two versions of the same audit:

With records. It is a client's reimbursement of a location fee that Tomas had already netted against the expense rather than reporting gross. The invoice and the vendor bill show it, the reporting is corrected with no change in tax, and the examination closes.

Without records. It goes into gross receipts. At the combined 34.58% marginal rate — self-employment tax at 15.3% on 92.35%, plus 22% income tax on what is left after the deductible half — that is $1,528.23 of tax, and if the accuracy-related penalty applies, another $305.65 on top, plus interest from the original due date.

$1,833.88 for one deposit nobody wrote a note about.

The habits that make this a non-event

• Separate the accounts. Commingling is usually framed as a bookkeeping nuisance. Its real cost is that it lengthens the list of accounts that have to be explained, and every extra account is more deposits to characterise
• Deposit business income intact. Depositing the net after paying a subcontractor in cash makes the deposit record disagree with the invoice, and the invoice is what the examiner ties to
• Label the nontaxable deposit on the day it lands. "Transfer from savings," "Dad — loan for van," "State Farm claim #." Ten seconds now; unreconstructable in three years
• Reconcile monthly, not annually. The IRM warns examiners explicitly that yearly totals can reconcile while the monthly pattern does not — receipts under-deposited in the early months, balanced by over-deposits at year end. If a monthly reconciliation is what an examiner runs, it is what you should run
• Keep the loan paperwork with the tax file, not the car file. Loan proceeds are the most common large nontaxable deposit a freelancer has, and the IRM tells examiners to ask for the application and the instrument. Both live in a folder you have not opened since signing
• Match deposits to invoices as they happen. The corpus's guide to matching receipts to bank transactions is the expense-side version of this discipline; the income side is the one with the bigger downside

Frequently Asked Questions

What is the bank deposits method and when does the IRS use it?

It is a formal indirect method of determining income, set out in Internal Revenue Manual 4.10.4, in which an examiner adds up total deposits rather than auditing your reported receipts. The theory is simple: money that arrives has to land somewhere, so total deposits plus cash spent without being deposited plus cash accumulated and not deposited, less amounts you can show were nontaxable or duplicated, approximates gross receipts. The IRM notes the method determines gross receipts from all sources and does not require the examiner to audit or verify the expenses you deducted, which is what makes it attractive when records are weak. Examiners reach for it when the books are inadequate or missing, when a financial status analysis suggests you are living on more than you reported, when a business is cash-intensive, or when a bank account analysis during the routine minimum income probe shows deposits materially exceeding reported gross receipts. It is not reserved for fraud cases and it is not rare. One statutory limit applies throughout: section 7602(e) forbids the IRS from using financial status or economic reality examination techniques to determine the existence of unreported income unless it has a reasonable indication that unreported income is likely, so the predicate has to exist before the method is used.

Does the IRS look at my personal bank account in an audit?

Yes, when income is in question, and the scope is wider than most people expect. Internal Revenue Manual 4.10.4 defines total deposits for this purpose as amounts deposited from both taxable and nontaxable sources to all bank and financial accounts maintained or controlled by the taxpayer, and it extends the same treatment to savings and loan accounts, investment trusts, brokerage accounts, credit unions and other financial institutions. The explanation of the formula goes further and includes the taxpayer's business and personal accounts, the spouse's accounts, and dependent children's accounts. The IRM's reasoning is stated openly: if the analysis is limited to business accounts only, omitted taxable income sitting in personal accounts will never be discovered. This is the strongest practical argument for keeping business and personal money apart, because separation does not merely make bookkeeping tidier — it shortens the list of accounts that have to be explained.

What deposits are not income?

The Internal Revenue Manual lists them, and the list is your defence: gifts, inheritances, loan proceeds, transfers between your own accounts, checks written to cash and then redeposited, tax-exempt interest, insurance proceeds and federal tax refunds. Two more categories matter in practice — money already reported elsewhere, such as a spouse's wages that appear on a W-2, and a client refund or reversed payment that is not new income. The difficulty is never the category, it is the evidence. An examiner analysing loan proceeds will ask for the loan application and the debt instrument, will check the application against your reported cash flow and gross receipts for consistency, and for a loan you made to someone else may ask that person for a notarised statement of the terms. A gift needs something contemporaneous from the giver. A transfer needs both sides of it. A deposit you cannot characterise is treated as gross receipts, so the record is the whole game.

Can the Cohan rule help with unexplained deposits?

No, and understanding why is the point of this whole topic. Cohan v. Commissioner allows a court to approximate a deduction the taxpayer clearly incurred but cannot fully document. It is a rule about deductions, and it starts from the premise that an expense really happened. An unexplained deposit is the opposite situation: money demonstrably arrived, and the question is whether it was taxable. There is nothing to estimate in your favour, because the fact in dispute is characterisation rather than amount. That asymmetry is why unreported income is a far more dangerous audit exposure than an undocumented expense. A lost receipt costs you a deduction at your marginal rate; an unexplained deposit adds to gross receipts, which raises income tax and self-employment tax together and can carry a 20% accuracy-related penalty on the resulting understatement.

How do I prepare for an audit that looks at my deposits?

Reconcile deposits to reported gross receipts yourself, before anyone asks, and do it monthly rather than annually. The Internal Revenue Manual warns examiners specifically that total deposits often reconcile with reported receipts on a yearly basis while a closer look month by month shows they do not, so the annual total agreeing proves less than it appears to. Beyond that, three habits carry most of the weight. Keep business and personal money in separate accounts, so the list of accounts to explain is short. Label every nontaxable deposit at the moment it happens — transfer, loan, gift, refund — because the characterisation is obvious on the day and unrecoverable three years later. And answer the cash-on-hand question in the opening interview carefully and accurately, because the IRM tells examiners to establish cash-on-hand and accumulated funds early precisely so that an after-the-fact cash-in-the-mattress explanation cannot be used later.

Authoritative References

• IRS Internal Revenue Manual 4.10.4 — Examination of Income
• IRC §6001 — Notice or regulations requiring records, statements, and special returns
• IRC §7491 — Burden of proof
• IRC §7602 — Examination of books and witnesses (see (e), limitation on financial status techniques)
• IRC §446 — General rule for methods of accounting
• IRS — Publication 583, Starting a Business and Keeping Records

Related reading: The Cohan rule and lost receipts · Commingling business and personal funds · Bank statements vs receipts · Matching receipts to bank transactions · Surviving an IRS document request

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This guide is general education for U.S. freelancers and Schedule C filers in 2026. It is not personalized tax advice. The Internal Revenue Manual is internal IRS guidance rather than law and confers no rights on taxpayers — it is quoted here because it describes what examiners are instructed to do. An examination that has moved to an indirect method of determining income is one to take to a CPA, an enrolled agent or a tax attorney rather than to handle alone.