IRS Letter 6291 Crypto Tax Response: Expert Guide & Steps

February 9, 2026 10 min read

IRS Letter 6291: Crypto Tax Guide & Next Steps

This guide explains what IRS Letter 6291 is, why you received it, the penalties and timelines at stake, and a clear, step-by-step response plan tailored to crypto activity and offshore accounts so you can respond confidently.

What IRS Letter 6291 Really Means (and Doesn’t)

You want to respond confidently—so here’s the plain‑English read: IRS (Internal Revenue Service) Letter 6291 flags potential gaps in your crypto or offshore reporting, but it is not a tax bill or final assessment. It usually means the IRS sees activity—think high‑volume exchange trades, large bank on/off‑ramps, or a 1099‑K (third‑party payments form) mismatch—and wants clarification. Deadlines apply (often ~30 days from the notice date), and you have options. A methodical reconstruction and timely reply can cap, or avoid, penalties.

Think of it as an inquiry—a soft contact asking for your numbers, not a verdict. Clarity comes from data, not panic: pull exchange CSV (spreadsheet) exports, wallet addresses, and bank statements, then map totals to what you filed. For example, reconciling deposits to trades often explains “income” the IRS flagged. Stay calm, organize your facts, and we’ll shape a clean narrative and exhibits that answer every question.

💡 Good to Know

You’re not alone—6291 is common in crypto. With a structured plan and clean reconciliations, we routinely close cases in 6–10 weeks. Next: what triggers 6291 and how the IRS got your data.

What Is IRS Letter 6291? Crypto, Offshore Accounts, and Disclosure Rules.

So what triggers 6291 and how did the IRS get your data? Letter 6291 is an IRS (Internal Revenue Service) contact that flags possible gaps in digital‑asset reporting, often tied to crypto held on foreign exchanges or self‑custody wallets that interacted with offshore venues. It’s an information request, not a bill, and it points to mismatches or missing context in your return.

In plain terms, it’s a soft knock, not an exam. The IRS is asking you to reconcile what you reported with data they already have. If you answer within the deadline (often about 30 days from the notice date) and supply clean workpapers, many cases end with no‑change or minor adjustments. We use that window to fix gaps before it becomes an examination.

Where does their data come from? Information‑exchange treaties, John Doe summonses (broad subpoenas to exchanges), 1099 mismatches (1099‑K/1099‑B/1099‑DA vs your 1040), blockchain analytics, and even whistleblowers. Historically, John Doe actions targeted Coinbase and Kraken; analytics can also reference activity on platforms like KuCoin or Bitfinex. KYC (know‑your‑customer) records obtained via legal process often tie accounts to taxpayers.

Banks and payment rails add more signals: cross‑border wires, large ACH transfers, and card purchases to or from exchanges. FATCA (Foreign Account Tax Compliance Act) partner institutions report U.S. account holders, and foreign brokers share data under local laws and agreements. Domestic brokers and new digital‑asset reporting rules generate additional 1099s. Put simply, multiple pipes feed the same picture.

Why this matters: if an account is “offshore,” you may owe FBAR (FinCEN Form 114) when foreign accounts exceed $10,000 in aggregate, and FATCA Form 8938 when assets pass filing thresholds (often starting around $50,000 for single filers). Crypto on non‑U.S. platforms can trigger these. We’ll break down FBAR/FATCA thresholds next.

FBAR vs. FATCA for Crypto: Thresholds, What Counts, and Common Misconceptions.

We just said we’d break down FBAR and FATCA thresholds. This quick table shows which form applies, the dollar triggers, and how common crypto platforms fit, using FBAR (FinCEN Form 114) and FATCA (Form 8938) in plain English.

Disclosure	Who Files	Threshold	What’s Included	Crypto Relevance
FBAR (FinCEN Form 114)	U.S. persons with foreign financial accounts	Aggregate value over $10,000 at any time in the year	Foreign accounts at exchanges/custodians; excludes self-custody wallets/private keys	Offshore exchange accounts and fiat balances often require reporting
FATCA (Form 8938)	Specified individuals and certain domestic entities	Varies by status and residence; e.g., $50k/$75k single, higher for expats	Specified foreign financial assets, including accounts and certain foreign-held interests	Some custodial crypto via foreign financial institutions may qualify; facts matter
Form 1040 Crypto Question	All individual U.S. filers	N/A (not a dollar threshold)	Whether you disposed of or received digital assets	Answer accurately; inconsistencies with 1099s or bank data raise flags
Form 8938 vs. FBAR	Many taxpayers must file both when thresholds are met	N/A (different triggers; compare separately)	Different laws, definitions, due dates, and filing locations	Filing one never substitutes for the other

Self-custody (you hold your private keys) is generally not an “account” for FBAR, but a custodial account at a foreign exchange can be. Example: Binance.com with fiat rails resembles a foreign financial account. DeFi protocol wallets are typically user-controlled smart contracts, not bank accounts, yet some centralized custodians label DeFi “earn” products as accounts. Year-by-year facts drive the answer, so document balances and who held custody.

Multi‑sig (multiple private keys needed) doesn’t change whether there’s a foreign financial account; custody and account structure do. Wrapped assets (for example, wBTC) follow the account that holds them. Derivatives and margin on foreign platforms can create reportable accounts even when collateral is crypto only. Judgment matters. We memorialize positions in a short memo, so if questioned later you can show the rationale and sources.

Why Did I Get IRS Letter 6291? The Most Common Crypto Triggers.

Now that you know where FBAR and FATCA fit, where do crypto users actually trip? We see the same patterns weekly—if one looks familiar, you’re not alone.

Holdings on non-U.S. exchanges without FBAR/FATCA filings
Large transfers between U.S. and foreign platforms with no disclosures
On-chain activity linked to offshore venues identified by analytics
Prior-year 1040 crypto question answered incorrectly
1099/Cost basis mismatches vs. exchange data the IRS received
‘Quiet’ amended returns without proper disclosure narrative

IRS matching pulls from 1099s, cross‑border reports, bank wires, and blockchain analytics, then compares that view to your return. Letter 6291 is their opening move to resolve gaps before escalating. Ignore the patterns and it often graduates to an exam or CP2000 with penalties.

What’s at Stake: FBAR, FATCA, Accuracy, and Civil Penalties for Offshore Crypto.

Use this matrix to see how issues trigger penalties and where crypto exposure fits. Read left to right: the rule, the tripwire, the dollar bite, and how digital-asset facts connect. These are ranges; facts, years, and intent change outcomes.

Issue	Trigger/Threshold	Penalty Range	Crypto Angle
FBAR non-willful	Fail to file; facts show non-willful	Up to $10,000 per violation (inflation-adjusted)	Applies to foreign exchange accounts
FBAR willful	Willful failure or recklessness	Greater of $100,000 or 50% of balance per year	Severe; multiple years compound
FATCA Form 8938	Fail to file when required	$10,000 initial; up to $50,000 for continued non-filing	Separate from FBAR
Accuracy-related	Understatement due to negligence	20% of underpayment	Often triggered by basis/gain errors
Civil fraud	Intent to evade tax	75% of underpayment	Rare but high risk for willful schemes
Information document request (IDR) non-response	Miss IDR deadlines	Additional penalties; expands audit	Delays escalate scrutiny

Most letters give 20–30 days from the notice date. Miss it and you invite escalation or an Information Document Request. If you need time, request an extension before the deadline and keep proof. Build your reconstruction first, then respond in writing and track receipt.

Before You Respond: 7 Costly Missteps to Avoid.

Before you put pen to paper, protect yourself by avoiding the traps we see most. Use this as a quick pre‑flight check while you gather data and draft your response.

Don’t: Call the IRS to ‘explain’ without counsel/strategy
Don’t: Rush a quiet disclosure via amended return with no narrative
Don’t: Ignore FBAR/FATCA while fixing income only
Don’t: Miss response deadlines—ask for time properly if needed
Don’t: Provide incomplete transaction histories or cherry-picked data
Don’t: Assume self-custody always avoids disclosure rules
Don’t: Reuse flawed exchange 1099s without reconciliation

Your 10-Step Plan to Handle IRS Letter 6291 (Crypto Edition).

You just saw why reusing flawed 1099s backfires. Instead, follow this timeline—from your first 48 hours through filing and follow‑up—so you respond cleanly, on time, and with evidence the IRS can verify.

Step 1: Pause and preserve deadlines (request extension if needed) — Calendar the response date (usually 30 days from notice). If records are scattered, call to request time; note agent name and case number. Keep certified‑mail and call logs.
Step 2: Centralize data: exchanges, wallets, DeFi, bank on/off-ramps — Pull CSVs from each exchange, wallet addresses, and DeFi (decentralized finance) logs. Add bank on/off‑ramp statements. Example: Coinbase trades, Binance.com fiat balance, 3/12 wire in, 6/30 withdrawal out.
Step 3: Reconstruct cost basis with a reconciliation tool/method — Apply a consistent tax‑lot method with our DAR (Digital Asset Reconciliation): FIFO (first‑in, first‑out), HIFO (highest‑in, first‑out), or specific ID. Rebuild missing basis; reconcile bridges, wraps, liquidity‑pool adds/removals, staking rewards.
Step 4: Map foreign vs. domestic accounts; test FBAR/FATCA thresholds — Tag accounts as U.S. or foreign. Test FBAR (FinCEN Form 114, $10k aggregate) and FATCA (Form 8938, thresholds vary) year‑by‑year. Example: Binance.com fiat plus derivatives usually counts as foreign.
Step 5: Quantify exposure (tax, interest, penalties) under scenarios — Compute potential tax due, interest at current IRS rates, and penalties by scenario. Example: add $18k gains from 2021 staking; 20% accuracy penalty risk vs. reasonable‑cause abatement.
Step 6: Choose path: Streamlined, Delinquent FBAR, VDP, or other — Pick your track: Streamlined procedures (non‑willful offshore), Delinquent FBAR (FinCEN 114 only), or VDP (Voluntary Disclosure Program) if risk of willfulness. We’ll weigh facts, years, and amounts.
Step 7: Prepare narratives and reasonable-cause statements (if applicable) — Draft a clear narrative and, if needed, a reasonable‑cause statement. Example: exchange shutdown, incomplete 1099‑B (broker form), or medical hardship that delayed records. Keep timelines, sources, and assumptions explicit.
Step 8: Draft and file amended returns and disclosures correctly — Prepare 1040X (amended return), updated 8949/Schedule D, Schedule 1 income, and any FBAR (FinCEN 114) or FATCA (Form 8938) filings. Align totals exactly with your reconciliations.
Step 9: Package evidence: ledgers, wallet proofs, KYC screenshots — Assemble exhibits: transaction ledgers, wallet proofs (public addresses), bank statements, and KYC (know‑your‑customer) screenshots linking accounts to you. Add an index so reviewers find evidence fast.
Step 10: Respond to the IRS with a concise, complete packet and follow through — Send a concise packet via certified mail or IRS portal, keep proof of receipt, and calendar follow‑ups. Confirm processing, monitor transcripts, and be ready to answer IDRs (information document requests).

Your facts drive the strategy. One‑size‑fits‑all fixes—especially “quiet” amendments without disclosure—can backfire with penalties. Use the steps to surface the truth, then choose the safest remediation path. Next, we’ll map options to your situation.

Streamlined vs. Delinquent FBAR vs. VDP vs. Quiet Disclosure (Crypto Context).

You just surfaced the facts—now choose the safest remediation path. This side‑by‑side shows who each option fits, what it requires, and why the choice affects penalties, timelines, and peace of mind in crypto cases.

Path	Best For	Key Requirements	Pros	Cons	Crypto-Specific Notes
Streamlined Filing Compliance	Non‑willful taxpayers who missed foreign account filings or underreported by mistake	3 years Form 1040X; 6 years FBARs (FinCEN Form 114); non‑willful certifications	Reduced penalties; predictable IRS process; closes open issues efficiently	Must truthfully certify non‑willfulness; ineligible if facts suggest willfulness	Crypto tracing needed across exchanges and wallets; our DAR workpapers make it manageable
Delinquent FBAR Submission	Missed FBARs (FinCEN Form 114) but no unreported income or IRS contact	File late FBARs with explanatory statement; align year‑end balances to bank/exchange records	Simple for narrow, clean facts; quick Treasury e‑file process	Limited to FBAR issues; fails if income was omitted or facts are messy	Confirm no staking rewards, interest, or gains tied to those foreign accounts
Voluntary Disclosure Program (VDP)	Potential willfulness exposure, prior warnings, or significant offshore structures	Preclearance request, intake letter, detailed amended filings, interviews, and payments	Resolves high‑risk civil/criminal exposure under a structured framework	Higher penalties, fees, and time; intense documentation burden	Choose if facts show concealment (e.g., nominee accounts); safer than hoping 6291 fades
Quiet Disclosure (Not Recommended)	Those trying to avoid programs by mailing silent amendments	Amended returns without certifications; no FBARs/FATCA; no narrative to IRS	Looks fast and cheap up front	High audit risk; seen as evasive; penalties can stack across years	Crypto 1099‑DA and blockchain forensics make detection likely; avoid this route

The Crypto Paper Trail: What to Gather Before You Respond.

Since 1099‑DA matching and blockchain forensics make detection likely, your best defense is a tight paper trail. Collect these now—organized files speed resolution and reduce penalties. Example: a 6/30 wire matched to a Binance CSV.

Exchanges: CSV/API exports, account statements, and KYC screenshots
Wallets: Address list with proofs of control (signed messages if needed)
DeFi: Protocol logs, staking/LP records, reward histories
On/Off-ramps: Bank/fiat statements matching crypto flows
Cost basis: FIFO/LIFO methodology with reconciliation logs
Foreign accounts: Highest balances for FBAR; year-end for FATCA
Tax returns: Prior-year 1040, Schedules D/1, 8938 as applicable
Narratives: Non-willful statements and reasonable cause (drafts)
IDs and residency: Evidence supporting filer status and thresholds
Communications: Prior IRS notices and correspondence log

From Panic to Resolution — Real Crypto Scenarios (Anonymized).

Case A: Domestic CEX 1099 mismatch, no offshore

With your communications log and organized exhibits in hand, we responded to a 6291 for a CEX (centralized exchange) trader flagged by 1099‑K (third‑party payment form) and 1099‑DA (digital asset info return) mismatches. Facts were domestic only, no offshore. Path: Explanation with reconciliations, no amendments. Outcome: no‑change; IRS closed after reviewing DAR (Digital Asset Reconciliation) workpapers. Taxes due: $0; interest/penalties: none assessed. Timeline: about 8 weeks from mailing to closure. Results vary, but clean math wins.

Docs included Coinbase and Kraken CSVs, bank wires matching fiat on‑ramps, wallet addresses for withdrawals, and a short narrative explaining 1099‑K gross receipts vs. actual taxable gains. We indexed exhibits so the reviewer could jump to each reconciliation. We sent via certified mail, tracked delivery, and confirmed receipt on the phone transcript. The case did not escalate to an exam or IDR (Information Document Request). Confidence returned fast.

Case B: DeFi and NFT activity on foreign platforms

Client used Bybit and KuCoin (non‑U.S. exchanges) with small fiat balances and heavy DeFi (decentralized finance) and NFT (non‑fungible token) activity routed through those accounts. Income was already reported on the original return; foreign account filings were missed. Path: Delinquent FBAR (FinCEN Form 114) for 3 years with an explanatory statement; Form 8938 (FATCA, foreign asset reporting) not required based on thresholds. Outcome: Treasury accepted late FBARs; IRS kept the 6291 open briefly, then closed without FBAR penalties.

We documented highest yearly balances per account, attached exchange statements, and mapped fiat rails to bank statements. The narrative explained why pure on‑chain wallets aren’t FBAR accounts, while custodial exchange wallets with fiat are. Filing took about two weeks; acceptance notices arrived within six weeks. IRS correspondence ended with a routine closure letter. No penalties were proposed; results depend on facts and timing.

Case C: Offshore CEX with willfulness risk, VDP path

Facts signaled willfulness risk: prior warnings from a foreign broker, nominee account usage, and deleted emails. We advised the VDP (Voluntary Disclosure Program) to resolve potential criminal exposure and consolidate civil penalties. Path: preclearance, intake, full amended filings, and comprehensive DAR (Digital Asset Reconciliation) workpapers across five years. Result: case resolved within program terms; IRS accepted disclosures and set penalties per VDP framework with a payment plan. Hard path, but the safest.

We handled all agent calls under a Form 2848 (power of attorney), managed multiple IDRs (Information Document Requests), and coordinated third‑party records from two exchanges. The client cooperated fully, which kept credibility high. Timeline ran about 14 months end‑to‑end, with milestones every 60–90 days. Final terms included agreed tax, program penalties, interest, and a streamlined installment agreement. Want this level of structure without the stress? Next, we’ll show exactly how we run it for you.

How Count On Sheep Gets Crypto Letter 6291 Cases Resolved.

Want that structure without the stress? Here’s how we run it: our Digital Asset Reconciliation (DAR) process turns messy wallets and exchange exports into CPA‑ready numbers. You get clarity. Led by former Big 4 accountants and overseen by licensed CPAs (certified public accountants), we ingest CEX (centralized exchange) and DEX (decentralized exchange) data, tag foreign vs. domestic accounts, and rebuild cost basis across chains. Then we map results to your return and the IRS view. The outcome is clear schedules, ties to 1099 forms and bank flows, and a narrative that answers Letter 6291 precisely.

So what keeps your file bulletproof in an exam? Tooling matters. We use API (application programming interface) pulls, signed CSV (comma‑separated values) hashes, and on‑chain explorers to create a verifiable audit trail. Every file goes through a three‑layer review: preparer, senior reviewer, and CPA sign‑off. Controls include variance checks against transcripts, 1099‑K/1099‑DA information‑return tie‑outs, and basis continuity tests year‑to‑year. We maintain version control and an exhibit index so any IRS examiner can trace one trade to the gain line in minutes. That’s exam‑ready.

Reconciliation: Full transaction and basis rebuild across chains/exchanges; ties to bank on/off‑ramps
Disclosures: FBAR (FinCEN 114), FATCA (Form 8938), and amended returns with clear narratives
Defense file: Organized exhibits, ledgers, and IDR (Information Document Request)‑ready packets with index
Tax optimization: Loss harvesting, method elections, and timing strategies documented for consistency
Communication: IRS‑ready correspondence, certified‑mail proof, portal uploads, and deadline management

📈 Proof

We’ve helped 500+ United States taxpayers and businesses reconcile digital assets with confidence, with most 6291 cases resolved in 6–12 weeks.

If you’re facing Letter 6291 or want to get compliant fast, explore our cryptocurrency tax preparation services to see deliverables, timelines, and pricing.

FAQs About IRS Letter 6291 and Crypto.

Before you review pricing, here are the quick, practical answers we give in consults. This is general guidance, not legal advice—your facts control the outcome.

Quick take: Is Letter 6291 an audit?

Usually it's a compliance notice (soft contact), not a formal exam. It asks you to reconcile what you reported with data the IRS already has. It escalates to an examination or CP2000 (underreporter notice) if you ignore deadlines, send incomplete records, or the numbers don’t tie.

Quick take: Do I need FBAR for exchange accounts?

FBAR (FinCEN Form 114) targets foreign financial accounts. A custodial account at a non‑U.S. exchange with fiat rails—example: Binance.com holding USD/EUR—often qualifies when your aggregate max exceeded $10,000. Pure crypto-only records without a custodial account may not. Facts matter: balances, custody, and year‑by‑year thresholds drive filing.

Quick take: What about self-custody and DeFi?

Self‑custody (you hold the keys) is generally not an FBAR “account.” But using foreign custodial venues, derivatives, or fiat rails can trigger FBAR or FATCA (Form 8938). Example: staking via a foreign exchange wallet differs from staking from your Ledger wallet. We document positions with a memo when rules are gray.

Quick take: Should I call the IRS right away?

Call only to protect your deadline or request an extension, then stop. Going on‑record without a plan can box you into statements before your data is reconciled. Secure your documents, pull transcripts, and engage representation (Form 2848/8821, IRS authorization forms) if you want us to speak for you.

Quick take: How far back do I fix?

Typical scope is 3 years of amended returns and 6 years of FBARs. Exceptions apply: substantial omissions can extend the assessment window to 6 years, and fraud has no limit. We review transcripts, 1099s, and balances, then tailor the lookback to your facts and chosen program.

Quick take: Can crypto losses help?

Yes—proper basis reconstruction and tax‑loss harvesting can offset capital gains and up to $3,000 of ordinary income yearly. Crypto isn’t subject to wash-sale rules as of our last update. Losses reduce tax due, not FBAR/FATCA penalties, so documentation is critical.

Ready to Resolve Letter 6291? Get a Crypto Letter Review.

Documentation is critical—so let’s get yours organized fast. Book a free 15‑minute triage and leave with a 48‑hour action plan, deadline check, and what to send. We work confidentially and outcome‑first, with CPA review. Prefer phone? Call 858.434.7547. Deadlines are short; we can request extensions today.

✅ You're Safe Here

Free 15‑minute intake. No obligation. We use encrypted uploads; share only what’s needed—exchange CSVs, wallet addresses, bank pages. Your data stays private.

Resources and Official Guidance.

Your data stays private—and if you want to double‑check the rules yourself, start with these official sources. We link only to IRS (tax authority) and FinCEN (financial crimes bureau) pages for the latest guidance.

IRS: FBAR (FinCEN 114) filing guidance
IRS: FATCA/Form 8938 instructions
IRS: Streamlined Filing Compliance Procedures
IRS: Voluntary Disclosure Practice (IRM)
FinCEN: FBAR reference materials
IRS: Digital assets (virtual currency) FAQ

About the Author.

You just saw the IRS Digital Assets FAQ and FinCEN guidance—my job is translating them into filings that stand up. I’m a licensed CPA (certified public accountant) and former Big 4 accountant, now focused on crypto tax in San Diego. At Count On Sheep, I lead our Digital Asset Reconciliation (DAR) across CEX/DEX (centralized/decentralized exchanges), DeFi (decentralized finance), NFTs (non‑fungible tokens), and foreign platforms. Across 500+ files and 200+ IRS notices—including 6291 letters—we’ve delivered CPA‑ready reports, FBAR (FinCEN 114) and FATCA (Form 8938) filings, and defense packets. Most cases close in 6–12 weeks with clean reconciliations and clear narratives.

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DeFi

Post by Greyson W.
March 31, 2026