Most of what you've read online about IRS problems is wrong, or at least misleading. I'm Darrin Mish. I practice tax law in Tampa and I've been doing this for 32 years. Here's what's actually true.
The Forms Run Across Multiple Agencies
U.S. taxpayers with foreign crypto activity face a reporting framework that spans the IRS, the Treasury Department’s FinCEN division, and (for some taxpayers) state revenue departments. Each agency has its own forms, its own thresholds, and its own penalty structure. Understanding the full stack is the only way to handle foreign crypto compliance correctly.
The good news is that the forms layer up logically. The bad news is that missing any one of them creates a separate penalty exposure.
Layer One: Income Tax Reporting on Form 1040
The foundation of crypto tax compliance is reporting income from crypto transactions on the annual income tax return.
Every taxable crypto event generates a gain or loss: sales of crypto for fiat, swaps between crypto types, payments in crypto for goods or services, receipts of crypto as payment, mining rewards, staking rewards, airdrops, hard forks, and certain DeFi activities.
The transactions are reported on Form 8949 (Sales and Other Dispositions of Capital Assets), summarized on Schedule D (Capital Gains and Losses), and flow to Form 1040.
Mining and staking income, paid-in-crypto compensation, and crypto received as business payment are reported as ordinary income on Schedule 1 or Schedule C depending on the nature.
The Form 1040 digital asset question must be answered “yes” if there was any digital asset activity during the year. The question applies to all activity, U.S. and foreign.
Layer Two: FBAR (FinCEN Form 114)
FBAR applies when the aggregate value of foreign financial accounts exceeded $10,000 at any time during the year. Foreign crypto exchange accounts (where the exchange holds custody) are generally treated as foreign financial accounts for this purpose.
The form is filed electronically through the BSA E-Filing System maintained by FinCEN. The due date is April 15 with an automatic extension to October 15.
Self-custody crypto (hardware wallets, software wallets) is generally not FBAR-reportable because there is no foreign financial institution holding the assets.
The penalty for missing FBAR runs from roughly $16,000 per violation (non-willful) to the greater of $156,000 or 50 percent of the account balance (willful), all inflation-adjusted.
Layer Three: Form 8938 (FATCA)
Form 8938 is the IRS FATCA reporting form, attached to the income tax return. Thresholds depend on filing status and residency:
Single U.S. residents: $50,000 on the last day of the year or $75,000 at any time.
Married filing jointly U.S. residents: $100,000 / $150,000.
U.S. residents living abroad have higher thresholds, ranging up to $400,000 / $600,000 for married filing jointly.
Form 8938 covers specified foreign financial assets, which include foreign accounts holding crypto under current IRS guidance. The form requires identification of the foreign financial institution, account number, maximum value during the year, and other details.
Form 8938 and FBAR are not duplicates. They go to different agencies, have different thresholds, and impose different penalties. Both are required if applicable.
Layer Four: Form 8621 (PFICs)
If foreign crypto investment activity includes pooled vehicles – foreign crypto funds, foreign crypto trusts, certain DeFi staking pools structured as funds – PFIC reporting under Form 8621 may apply.
The passive foreign investment company rules apply when a foreign entity has 75 percent or more of gross income from passive sources, or 50 percent or more of assets producing (or held to produce) passive income.
Crypto-focused foreign funds typically hit one or both tests. Investors in these funds face the PFIC tax regime – default treatment imposes ordinary income tax rates and an interest charge on excess distributions and dispositions.
The PFIC issue is increasingly common as crypto-focused funds proliferate offshore. Cayman Islands, BVI, and various other jurisdictions have become hubs for crypto fund structures.
Layer Five: Form 5471 (Foreign Corporations)
If a U.S. person owns equity in a foreign company engaged in crypto activity – a foreign crypto trading company, a foreign mining operation, a foreign DeFi platform – Form 5471 reporting may apply.
The thresholds depend on ownership percentage and U.S. shareholder status, with 10 percent being the most common triggering point.
Many crypto entrepreneurs hold their operations through foreign entities for various reasons. Each ownership stake potentially generates Form 5471 reporting plus Subpart F and GILTI income inclusions.
Layer Six: Form 8865 (Foreign Partnerships)
Foreign partnerships engaged in crypto activity trigger Form 8865 reporting similar to Form 5471 for corporations.
DeFi protocols structured as foreign partnerships, multi-party offshore mining operations, and certain investment partnership structures fall here.
Layer Seven: Form 3520 (Foreign Trusts and Large Gifts)
If foreign crypto activity involves a foreign trust structure – a Cayman Islands crypto trust, a Liechtenstein crypto-holding structure, certain Singapore or BVI crypto vehicles – Form 3520 and 3520-A reporting may apply.
Crypto inheritance and gift activity can also trigger Form 3520. A U.S. person receiving crypto worth more than $100,000 from a non-U.S. person (or smaller amounts from foreign entities) files Form 3520 reporting the gift.
Layer Eight: State Reporting
State tax obligations parallel the federal framework in many cases. California, New York, Massachusetts, and other states have their own income tax on crypto gains. Some states require FATCA-like reporting in addition to federal Form 8938.
Florida, Texas, Tennessee, Nevada, and other no-income-tax states avoid the state-level layer but federal obligations apply regardless.
The Coordination Among Forms
For a typical foreign crypto holder, the form stack tends to look like this:
Income reporting: Form 8949 and Schedule D for every transaction. Schedule 1 for mining/staking/business income.
FBAR: Foreign exchange accounts over $10,000 aggregate.
Form 8938: If the FATCA threshold is met.
Form 8621: If holdings include PFICs.
Form 5471 / 8865: If there is ownership in foreign crypto-related entities.
Form 3520: If there were foreign crypto gifts, inheritances, or trust activity.
The forms are not alternatives. If the facts trigger multiple forms, all of them must be filed.
Common Mistakes
The compliance failures I see most often:
Underreporting transactions. Many taxpayers track exchanges but miss crypto-to-crypto swaps, DeFi interactions, and crypto-to-stablecoin moves. Every swap is taxable.
Missing FBAR for foreign exchange accounts. The “I thought crypto was different” position is not protective.
Form 8938 oversight. Even taxpayers who filed FBAR sometimes miss the parallel Form 8938 obligation.
Missed PFIC reporting on foreign crypto funds. Investors think they have a basic investment fund; the U.S. tax classification is far harsher.
Self-custody assumption that all reporting goes away. Self-custody affects FBAR and Form 8938 but does not change income tax reporting on transactions.
If You Have Missed Years
The disclosure paths for prior years of unfiled foreign crypto reporting:
Streamlined Filing Compliance Procedures for non-willful failures.
Voluntary Disclosure Practice for willful conduct.
Delinquent FBAR Submission Procedures for cases with only missed FBARs.
Delinquent International Information Return Submission Procedures for cases with only missed information returns and no unreported income.
Each program has eligibility requirements and tradeoffs. The right choice depends on the specific facts.
Three Steps for Foreign Crypto Compliance
First, inventory the activity. Every foreign exchange account, every foreign wallet provider, every foreign fund or platform you have used.
Second, reconstruct the transaction history. Crypto tax software ingests most exchange exports and produces transaction-level data for Form 8949.
Third, identify all applicable forms before filing. Filing income tax without the parallel FBAR or Form 8938 is incomplete reporting.
Get the Stack Right
After 32 years of international tax work and several years focused on the crypto layer, I will tell you that crypto compliance failures usually come from missing forms, not from incorrect income reporting. Contact the Law Offices of Darrin T. Mish, P.A. at (813) 229-7100. We map the full reporting obligation, file the right forms, and clean up any years where pieces were missed.