Avoid IRS Penalties and Audits: A Guide for Owners Abroad

The short answer

The IRS selects returns mainly through computer screening against statistical norms and through related examinations, such as audits of business partners.
Audit rates are low. For tax year 2017 the IRS reported coverage of 0.5% for individual returns and 0.1% for partnership returns.
The failure-to-file penalty is 5% of the unpaid tax per month, up to 25%. The failure-to-pay penalty is 0.5% per month, up to 25%.
Not filing Form 5472 costs $25,000 per form, for a foreign-owned single-member LLC that has reportable transactions.
Keep tax records for at least 3 years. If you never filed a return, keep them indefinitely.

Table of contents

How the IRS selects returns for audit
What actually raises your risk
Penalties you can avoid
What foreign-owned LLCs must file
How long to keep your records
Sales tax is a state matter
Working with a tax professional
Frequently asked questions

Most IRS problems for owners abroad do not start with an audit. They start with a missed filing, a late payment or numbers that do not match across returns. Those problems are predictable, and most of them are avoidable.

This guide explains how the IRS actually selects returns, which penalties apply most often, what foreign-owned companies must file and how long to keep your records.

How the IRS selects returns for audit

The IRS describes its selection methods on its own website:

Computer screening. Returns are compared against norms for similar returns. The norms come from audits of a statistically valid random sample, carried out through the National Research Program. Some returns are selected based solely on this statistical formula.
Related examinations. A return can be selected because it involves transactions with other taxpayers, such as business partners or investors, whose returns were selected.

The IRS also states that selection does not always mean there is a problem, that filing an amended return does not affect the selection of the original return, and that a refund is not necessarily a trigger.

Audit rates are low. For tax year 2017, the IRS reported audit coverage of 0.5% for individual income tax returns, 0.1% for partnership returns and 0.2% for S corporation returns.

What actually raises your risk

Popular lists of “audit triggers”, such as avoiding round numbers, are not IRS rules. The IRS does not publish its scoring criteria. What you control is the quality of what you file:

File every required return and information form. A missing Form 5472 is a penalty on its own, with or without an audit.
Keep your numbers consistent. The same figures should match across your returns, your company’s books and your bank statements, year after year.
Report all income. Income reported to the IRS by third parties should appear on your return.
Support every deduction. A deduction you cannot document is a deduction you can lose.

Penalties you can avoid

Failure to file: 5% of the unpaid tax for each month or part of a month the return is late, up to 25%. If the return is more than 60 days late, a minimum penalty applies.
Failure to pay: 0.5% of the unpaid tax for each month or part of a month, up to 25%. When both penalties apply in the same month, the failure-to-file penalty is reduced by the failure-to-pay amount.
Form 5472: $25,000 for each form not filed, or filed substantially incomplete, with additional penalties if the failure continues after an IRS notice.

Interest also accrues on unpaid tax. Filing on time, even when you cannot pay in full, limits the largest penalty. Every due date is in our calendar of IRS filing deadlines.

What foreign-owned LLCs must file

A single-member LLC owned by a foreign person is treated as a corporation for one limited purpose: reporting transactions with its owner and related parties. It needs an EIN, and it files Form 5472 with a pro forma Form 1120 when it has reportable transactions. Money paid to form, maintain or close the LLC counts.

BOI reporting to FinCEN is no longer on this list. Companies formed in the United States are exempt, under the final rule in force since August 14, 2026.

At the state level, expect:

A periodic report and, in many states, an annual tax.
Registration as a foreign company in any other state where you transact business.
Local business licenses, depending on your activity.

Our guide to annual compliance requirements has the full calendar, and the guide to zero-revenue companies covers companies with no activity.

How long to keep your records

The IRS ties record retention to the period during which it can assess tax:

3 years from filing, in most cases.
6 years if you did not report income that you should have reported and it is more than 25% of the gross income shown on the return.
7 years if you claim a loss from worthless securities or a bad debt deduction.
At least 4 years for employment tax records.
Indefinitely if you did not file a return, or filed a fraudulent one.

Keep invoices, receipts, bank statements, contracts and the documents behind every figure on your returns. Keep business and personal money in separate accounts: it makes records cleaner and protects the company’s separate status. See our bookkeeping services.

Sales tax is a state matter

Sales tax is not administered by the IRS. Each state sets its own rules. Since the Supreme Court’s 2018 decision in South Dakota v. Wayfair, states can require sellers without a physical presence to collect sales tax once they pass an economic threshold. Thresholds and rules differ from state to state, so check each state where you sell. See our guide on e-commerce sales tax compliance.

Working with a tax professional

CPAs and enrolled agents can prepare returns and represent you before the IRS, including answering notices. For a foreign-owned company, choose a professional who regularly handles Form 5472 and non-resident owners.

Frequently asked questions

How does the IRS choose which returns to audit?

Mainly by computer screening against statistical norms built from random audits, and through related examinations when a return involves partners or investors whose returns are audited.

Are foreign-owned LLCs audited more often?

The IRS does not publish audit rates by owner residence. What is certain is that a foreign-owned single-member LLC has an extra filing, Form 5472, and missing it carries a $25,000 penalty even without an audit.

What is the penalty for filing late?

5% of the unpaid tax per month or part of a month, up to 25%. The failure-to-pay penalty is 0.5% per month, up to 25%.

How long should I keep business tax records?

In most cases 3 years from filing. Longer in specific cases, and indefinitely if you never filed.

Does sales tax affect my IRS audit risk?

Sales tax is a state tax, handled by each state’s tax agency, not by the IRS.

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First published April 28, 2025. This article is general information, not tax advice for your situation. U.S. tax return filing | Book a free call