The short version

A denied theft loss deduction is not the same thing as the end of the case. It usually means the IRS has moved the file into a decision lane: agree, dispute, appeal, or resolve the balance while preserving the strongest defensible position.

The next move depends on the notice, the deadline, the amount at stake, and whether the record can still support the section 165 loss elements. Protect the response window first. Then decide whether to add proof, request Appeals, pay, set up a payment plan, or concede only the part that is actually weak.

Start with the IRS notice

The IRS notice page says the IRS may send a notice or letter when it has a question about a return, changed or corrected a return, or shows a balance due. It also tells taxpayers to review the notice carefully, keep it for their records, and act by the due date if a response is requested.

That makes the first review mechanical:

Identify the CP or LTR number.
Record the response due date.
Confirm the tax year, deduction, and amount the IRS changed.
Separate tax, penalties, and interest.
Decide whether the notice asks for more information, proposes a change, states a balance due, or explains appeal rights.

If you disagree, the IRS says to follow the notice instructions and include information and copies of documents for review. It also says replying by the due date is how to guarantee appeal rights. That deadline should drive the dispute calendar.

What the law still has to prove

Section 165 allows a deduction for losses sustained during the taxable year and not compensated by insurance or otherwise. For individuals, the statute limits deductible losses to business losses, losses from transactions entered into for profit, and certain casualty or theft losses.

For financial scams, IRS Publication 547 gives a practical screen. Victims of certain financial scams may be able to claim a theft loss deduction under section 165 only when the loss resulted from criminal conduct classified as theft under applicable state law, the taxpayer had no reasonable prospect of recovering the stolen funds, and the loss arose from a transaction entered into for profit.

That is why a denial should not be answered with emotion alone. A good defense file connects the documents to the legal elements: theft, profit motive, timing, recovery prospects, amount, and any reimbursement or expected reimbursement.

Your four main lanes after a denial

1. Agree and close the issue

Sometimes the IRS adjustment is correct. The records may show a personal-use loss, an unsupported amount, a reimbursement that was not accounted for, or a timing problem. If the notice is right, agreeing can limit additional dispute costs and move the case into payment planning.

Agreement does not mean ignoring the balance. If the notice shows an amount due, the IRS says paying by the due date can reduce interest and penalty charges even if the full balance cannot be paid.

2. Disagree inside the notice process

If the denial is premature or the proof file was incomplete, the first dispute lane is usually a written response to the notice. The response should be concise, sourced, and exhibit-based.

For a denied theft loss deduction, the response package usually needs:

A cover letter that states the issue, the tax year, the notice number, and the exact point of disagreement.
A short timeline of the scam, theft, recovery efforts, and discovery year.
Exhibits showing the transaction was entered into for profit.
Records showing the loss amount and any reimbursement or expected reimbursement.
Evidence that recovery was not reasonably expected when the deduction was claimed.
A copy of the notice and proof of timely response.

The response should not bury the reviewer in unsorted screenshots. A tighter package ties each exhibit to a disputed element.

3. Request Appeals when the case is ready for it

If the IRS sustains the adjustment or issues appeal rights, Appeals may be the next lane. The IRS Appeals page says a Small Case Request may be available when the entire amount of additional tax and penalty proposed for each tax period is $25,000 or less from an examination. Larger or more formal cases may require a formal written protest.

The Appeals file should be narrower than the original document dump. It should state the facts, identify the disputed issues, explain why the IRS position is wrong or incomplete, and cite the authority supporting the taxpayer’s position. For a denied theft loss deduction, that usually means organizing the record around state-law theft, profit motive, reasonable prospect of recovery, timing, and amount.

Appeals is not a place to pretend weak facts are strong. It is the place to separate the issues worth fighting from the issues that should be conceded or resolved through payment planning.

4. Resolve the balance while preserving the dispute strategy

Dispute and payment planning are not always separate conversations. If the notice creates a balance due, the taxpayer may need to reduce collection pressure while the dispute strategy is evaluated.

The IRS payment-plan page says individual taxpayers may qualify to apply online for a long-term payment plan if they owe $50,000 or less in combined tax, penalties, and interest and have filed all required returns. It also says a short-term payment plan may be available when the taxpayer owes less than $100,000 in combined tax, penalties, and interest.

Those thresholds do not decide whether the deduction was correct. They help frame cash-flow options if the adjustment stands, if only part of the deduction survives, or if payment is needed while the dispute moves forward.

The numbers that matter first

Decision point	Figure or threshold	Why it matters	Source
Small Case Request ceiling	$25,000 or less per tax period	May allow a Small Case Request for additional tax and penalty proposed from an examination.	IRS Appeals
Long-term online payment-plan threshold	$50,000 or less	Individuals may qualify online if combined tax, penalties, and interest are at or below this amount and required returns are filed.	IRS Payments
Short-term online payment-plan threshold	Less than $100,000	Individuals may qualify online for a short-term plan when combined tax, penalties, and interest are below this amount.	IRS Payments
Notice control number	CP or LTR number	The IRS says the notice or letter number helps identify details for the specific notice.	IRS Notice
Financial scam theft-loss screen	3 elements	Publication 547 identifies theft under state law, no reasonable prospect of recovery, and a transaction entered into for profit.	IRS Publication 547

The notice deadline still controls the immediate calendar. These numbers help choose the lane after the notice is read.

A practical dispute-and-defense checklist

Before sending the next response, build a clean decision file:

File section	What it should answer
Notice and deadline	What did the IRS change, what is the due date, and what rights does the notice describe?
Tax position	What deduction was claimed, for what year, and under what section 165 theory?
Theft element	What facts show criminal conduct classified as theft under applicable state law?
Profit motive	What records show the transaction was entered into for profit rather than personal use?
Recovery prospects	What recovery claims, bank recalls, insurance claims, law-enforcement reports, platform tickets, restitution updates, or civil claims existed when the deduction was claimed?
Amount	What transfers, basis records, reimbursements, and workpapers support the number claimed?
Dispute lane	Is the next step notice response, audit response, Appeals, payment plan, amended-return analysis, or partial concession?

This structure keeps the case practical. The goal is not to make every fact sound perfect. The goal is to identify which issues can be defended, which need more proof, and which should be resolved before they create a larger balance or missed deadline.

What not to do after a denial

Do not miss the response deadline while rebuilding the whole file. A partial but timely response is often better than a perfect package sent late.

Do not concede the full deduction just because the first IRS response was weak. If the records support some elements but not others, the right answer may be a narrower dispute, a partial concession, or a payment plan for the uncontested amount.

Do not assume an online payment plan is an admission that the IRS position is correct. Payment planning can be a cash-flow tool, but the dispute posture should be documented carefully before a taxpayer agrees to an adjustment or lets appeal rights expire.

Do not send original documents unless the IRS specifically requires them. Send copies, preserve the original file, and keep proof of submission.

How Sheepdog Tax Resolution can help

Request a dispute-and-defense review before the response window closes. The review focuses on the notice deadline, the IRS adjustment, the proof file, Appeals readiness, payment-plan exposure, and whether the strongest path is dispute, partial concession, payment strategy, or another resolution option.

Sheepdog Tax Resolution is veteran-owned and operated by Noah Green, CPA, CFE. No result is guaranteed. The right response depends on the notice, the records, the deadline, and the law that applies to the claimed loss.

Sources (primary authority first)

Prepared by Noah Green, CPA, CFE.

Denied Loss Deduction? Your Options for IRS Dispute and Defense