Written By: Michael Vale
Reviewed By: Bridgette Austin, Esq., EA, Co-Founder and Tax Attorney
Last Reviewed: October 25, 2026
An IRS bank deposit analysis adds up every dollar that landed in your accounts, subtracts the deposits you can prove were not income, and treats what is left as income you never reported. It’s the most common way the IRS builds an unreported income case. It doesn’t need a missing receipt to work. It only needs deposits you can’t explain.
Most pages on this subject skip the part that matters most. The IRS isn’t free to run this analysis whenever it likes. Federal law sets a condition first, and the IRS quotes that condition back to its own examiners. If a bank deposit analysis has landed on your desk, knowing that condition is worth more than another box of statements.
What is an IRS bank deposit analysis? An IRS bank deposit analysis is an indirect method of proving income. The examiner totals deposits across all your accounts for the year, removes transfers, loans, gifts and other non-income items you can document, and compares the remainder to the income on your return. Unexplained deposits are treated as taxable income.
We represent Michigan taxpayers in exactly these exams, so what follows is the mechanism and the response, not a warning.
How does an IRS bank deposit analysis work in 2026?
It works by subtraction. The examiner starts with your total deposits and takes away what you can prove was not income, and whatever survives that process becomes the proposed adjustment.
The order matters. First the IRS pulls every account with your name on it, personal and business, checking and savings. Then it adds up 12 months of deposits. Then it makes you account for each category: the transfer you made between your own accounts, the loan that funded the equipment purchase, the money your father wired you, the customer refund that came back. Every dollar you cannot tie to a document stays in the pile.
The IRS names this the Bank Deposits and Cash Expenditures Method. It is 1 of 5 formal indirect methods set out in its own examination manual, alongside the source and application of funds method, the markup method, the unit and volume method, and the net worth method.
This doesn’t happen only in field exams, though it does the most damage in person, which is why field audit preparation matters more than most people think. If this is your first IRS notice, start with how tax audits work.
One honest limit on the method: it works best when your business runs through the bank. If you take significant cash and never deposit it, a deposit analysis understates your income, and the IRS knows that. That is when it reaches for a different method, covered below.
The IRS needs a reason before it can run one
There is a statutory condition, and it is the single most useful sentence in this whole subject. The IRS may not go looking for unreported income by economic reconstruction unless it already has a reason to think unreported income exists.
The law says it plainly. Under IRC 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 IRS repeats that text to its examiners at IRM 4.10.4.5.1. The manual then sets out when a formal indirect method fits: when the books and records are missing, incomplete, or show irregularities, or when a financial status analysis turns up a material imbalance in cash flows. Those are the conditions. They aren’t a formality, and an examiner who can’t articulate one is reaching.
This is where we part company with most of what you’ll read online. The common advice is to cooperate fully and hand over everything, fast. We think that’s backwards as an opening move. Before you produce 3 years of statements across 6 accounts, make the examiner say what the reasonable indication is and which condition applies. You’re not refusing anything. You are asking the IRS to name the basis its own manual requires, and the answer tells you how much trouble you are actually in.
Now the part the argument does not survive without. This isn’t a magic key. The same manual, at IRM 4.10.4.2, requires examiners to complete minimum income probes in every examination regardless of whether the taxpayer keeps a proper set of books. Probing income is routine. Rebuilding it by economic reconstruction is not. Knowing which one is happening to you is the whole point of asking.
What deposits are not income?
Plenty of money that hits your account was never income, and the burden of showing that generally lands on you. Descriptions do not clear a deposit. Paired documents do.
| Deposit type | What clears it |
|---|---|
| Transfer between your own accounts | The matching withdrawal from the other account, same date and amount |
| Loan proceeds | The note or credit agreement, plus the lender’s disbursement record |
| Gift or inheritance | The giver’s own bank record and statement, or the estate documents |
| Repayment of money you lent | Your original outgoing payment, plus any written agreement |
| Insurance proceeds | The claim number and the insurer’s payment record |
| Customer refund or returned payment | The original payment in and the reversal back out |
| Redeposited cash | The earlier withdrawal the cash came from |
| Money held for someone else | The client or trust agreement showing the funds are not yours |
| Capital you put into your own business | The owner contribution entry and the personal account it came from |
| Income already reported elsewhere | The line on the return where it was already counted once |
Transfers between your own accounts are the single biggest source of double counting, and they are also the easiest to clear. Every transfer has a withdrawal on the other side. Pull both.
This is also the honest answer to a question we get constantly. Being audited without your receipts is survivable on the expense side. Being unable to explain deposits is a different and worse problem, because the IRS is adding to your income rather than denying a deduction. The same rebuilding skill runs in reverse when you’re filing back taxes without records.
When deposits fall short, the IRS switches methods
If your bank activity doesn’t capture the whole picture, the IRS changes tools rather than giving up. Four other methods sit in the same manual, and examiners run more than 1 in parallel when the numbers do not line up.
The net worth method
It measures how much your net worth grew over a period, adds your living expenses, subtracts known non-taxable sources, and calls the rest income. The Supreme Court approved it in Holland v. United States, 348 U.S. 121 (1954), and attached 2 safeguards that still bind the government. It must establish your opening net worth “with reasonable certainty,” and it cannot ignore the leads you give it, because “its failure to investigate leads furnished by the taxpayer might result in serious injustice.” If you hand the examiner a checkable explanation for where the money came from, the IRS has to check it.
The expenditures method
It looks at what you spent. If your spending outruns your reported income and you cannot show a non-taxable source that funded it, the gap becomes income. This one shows up when personal expenses run through a business account.
The source and application of funds method
It compares where money came from against where it went. If applications exceed sources, the difference is treated as unreported income. Common in closely held companies with several accounts and money moving between them.
Markup, unit and volume methods
These rebuild sales from the buying side: purchases, inventory, industry margins, unit counts. The IRS leans on them when point-of-sale records look unreliable, which is why they appear so often in the small business audit process and in exams of Michigan businesses that take a lot of cash. All 5 methods appear together in the IRS Cash Intensive Businesses Audit Techniques Guide, a training document last revised in April 2010 and still the clearest public statement of how examiners are taught to do this.
What happens if you can’t explain a deposit?
It gets added to your income, and then the penalty question opens. The adjustment itself is the smaller problem.
The ordinary outcome is the accuracy-related penalty under IRC 6662, at 20% of the underpayment. The serious outcome is the civil fraud penalty under IRC 6663, at 75%. The structure of that second one catches people off guard: under 6663(b), once the IRS proves any portion of the underpayment was fraudulent, the entire underpayment is treated as fraudulent unless you prove otherwise. The burden flips to you, piece by piece.
What separates the two isn’t the size of the number. It is what the record says about intent, which is the line between avoidance and evasion. Inconsistent explanations, documents created after the fact, and answers that do not match third-party records are what turn a civil adjustment into a fraud case. This is why the response has to be built once, correctly, rather than assembled in pieces under pressure.
How far back can the IRS go?
Normally 3 years. On an unreported income case, often 6. On a fraudulent return, forever.
| Situation | How far back | Statute |
|---|---|---|
| Ordinary return, no large omission | 3 years from filing | IRC 6501(a) |
| More than 25% of gross income omitted | 6 years from filing | IRC 6501(e)(1)(A) |
| False or fraudulent return filed to evade tax | No limit at all | IRC 6501(c)(1) |
That 25% threshold is exactly what a deposit analysis is built to cross, which is why these cases rarely stay inside 1 tax year. Once the examiner finds a pattern, the open years expand. If the exam ends without agreement, the next document you see is a notice of deficiency, and that one carries a hard deadline.
Can the IRS go straight to your bank?
Yes, and it doesn’t need your permission. It needs a summons, and you get notice plus a window to object.
The IRS issues a summons under IRC 7602, not a subpoena, and the difference is more than wording. When the summons goes to a third party such as your bank, IRC 7609 gives you rights that run on a clock. You get notice within 3 days of service, and no later than the 23rd day before the date set for producing the records. From that notice, you have 20 days to file a petition to quash.
Most people learn their bank was summonsed after the fact, because the notice arrives looking like more audit paperwork. Read the dates on anything that arrives during an exam.
Michigan runs its own version of this
Michigan Treasury does the same thing with a blunter rule, and a federal resolution doesn’t close the state file.
Treasury’s published audit guidance says it directly. Where an auditor uses a detail audit or a sample audit, “if the records are inadequate, the audit is based on the best information available.” There is no reasonable-indication condition written into that sentence the way IRC 7602(e) is written into the federal rule. Thin records and a Michigan auditor is a worse combination than thin records and an IRS examiner.
There is also a reporting duty most people miss. When the IRS changes your income, Michigan wants to hear about it from you. Treasury’s own guidance tells taxpayers to file an amended Michigan return within 16 weeks of the federal change, with the amended federal return and supporting schedules attached, and with any tax and interest paid. Ignore it and the state adjustment arrives later with interest already running.
And Michigan has its own criminal statute. Under MCL 205.27, filing a false or fraudulent return with intent to defraud or evade tax is a felony carrying up to 5 years, and the attorney general and county prosecutors share the power to enforce it. Settling with the IRS doesn’t settle that.
Answer with a schedule, not a story
The single most common mistake is explaining deposits in words. The IRS isn’t reading for plausibility. It is matching your explanation against documents it already has.
What works is a deposit-by-deposit schedule. Every deposit in the period gets a row: date, amount, account, category, and the specific document that proves the category. Transfers get matched to the withdrawal on the other side. Loans get the note. Gifts get the giver’s record. Anything you cannot document gets flagged as unresolved by you, before the examiner flags it, because a short honest unresolved list reads very differently from a long story with holes in it.
Three things to avoid while you build it. Do not guess at a category you cannot prove, because a wrong label you defend later is worse than an honest gap. Do not create documents to fill holes. And do not answer “why did you do that” questions in an interview before the schedule exists, because those answers become the record on intent.
What to do in the first week
Order the records before you respond to anything. Pull complete statements for every account for every year in play, including accounts you closed, because a missing account is what makes a reconciliation collapse at the end.
Then get the scope in writing. Which years, which accounts, which method. Then ask the examiner for the basis the manual requires. Then build the schedule.
If you’re past that point, or the examiner has gone quiet, that is the moment to bring in audit representation rather than after the report arrives. An IRS bank deposit analysis is winnable when the deposits get categorised and documented, and close to unwinnable once the record is full of explanations that do not match the paper. We work these cases across Michigan. Bring us the notice before you send the IRS a single statement.
FAQs
What is an IRS bank deposit analysis?
It is an indirect method the IRS uses to prove income. The examiner totals every deposit across your accounts for a year, subtracts the deposits you can document as non-income, and treats the remainder as unreported taxable income. The IRS calls it the Bank Deposits and Cash Expenditures Method, and it is 1 of 5 formal indirect methods in its examination manual.
Can the IRS run a bank deposit analysis on anyone?
No. Under IRC 7602(e) the IRS cannot use financial status or economic reality techniques to determine whether unreported income exists unless it already has a reasonable indication that unreported income is likely. Its manual adds the conditions: books that are missing, incomplete or irregular, or a financial status analysis showing a material cash-flow imbalance. Routine income probes are a different thing and happen in every exam.
What bank deposits are not taxable income?
Transfers between your own accounts, loan proceeds, gifts and inheritances, repayment of money you lent, insurance proceeds, customer refunds, redeposited cash, money passing through for someone else, and capital you put into your own business. Each one has to be paired with a document. A transfer needs the matching withdrawal, a loan needs the note, a gift needs the giver’s record.
What happens if I can’t explain a deposit to the IRS?
It gets added to your income. From there the accuracy-related penalty under IRC 6662 runs at 20% of the underpayment, and the civil fraud penalty under IRC 6663 runs at 75%. Under IRC 6663(b), once the IRS proves any part of the underpayment was fraudulent, the whole underpayment is treated as fraudulent unless you prove otherwise.
How far back can the IRS go on unreported income?
Generally 3 years from filing under IRC 6501(a). That becomes 6 years under IRC 6501(e)(1)(A) if you omitted more than 25% of the gross income shown on the return, which is the threshold a deposit analysis is designed to test. There is no time limit at all on a false or fraudulent return filed with intent to evade tax.
Can the IRS get my bank records without telling me?
The IRS issues a summons under IRC 7602, not a subpoena. When it goes to a third party like your bank, IRC 7609 requires notice within 3 days of service and no later than the 23rd day before the production date, and you then have 20 days from that notice to file a petition to quash. Miss the 20 days and the objection is lost.
Does Michigan do a bank deposit analysis too?
Yes, with a blunter rule. Michigan Treasury’s published audit guidance says that in either a detail or a sample audit, if the records are inadequate the audit is based on the best information available. Michigan also expects an amended state return within 16 weeks of a federal change, and MCL 205.27 makes a false or fraudulent return filed to evade tax a felony carrying up to 5 years.
Bridgette Austin, Esq., EA, spent three years at Michigan State University’s Tax Clinic representing low-income taxpayers before the IRS – two as a student clinician, one as a post-graduate fellow. That work shaped her practice. A Bellaire, Michigan native with a Northern Michigan University bachelor’s and an MSU law degree, she now resolves IRS and State of Michigan tax debt cases at Austin & Larson.
Recent Comments