IRS Country Codes for Form 5472
The IRS uses its own country code system that differs from the ISO standard. Using the wrong code on your tax forms can cause processing delays or rejection.
Key Takeaways
- IRS country codes are NOT the same as ISO 3166 two-letter codes
- Many common countries have completely different IRS vs ISO codes
- Always verify your code against the official IRS list before filing
- ForeignLLCTax.com automatically uses the correct IRS codes in your filing
Why This Matters
Most people assume that the two-letter country codes used on IRS tax forms are the same ISO 3166 codes used everywhere else on the internet. They are not. The IRS maintains its own country code list, and many codes differ from the international standard.
For example, if you are a Nigerian citizen filing Form 5472, you might instinctively enter "NG" as your country code — that is the ISO code for Nigeria. But the IRS uses "NI" for Nigeria. Enter the wrong code, and the IRS may not be able to match your filing to their records, causing processing delays or a notice requesting clarification.
Real-world impact: We regularly see filers who used ISO codes instead of IRS codes on their Form 5472. While it typically does not trigger a $25,000 penalty on its own, it can cause the IRS to flag your return for manual review — adding weeks or months to processing time.
Where Country Codes Are Needed
Country codes appear in multiple places across Form 5472 and related IRS filings. Here is where you need to get them right:
Form 5472 — Part I (Reporting Corporation)
- Line 1l — Country of incorporation
- Line 1n — Country under whose laws you file an income tax return
- Line 1o — Country under whose laws you file a second income tax return
Form 5472 — Part II (25% Foreign Shareholder)
- Country of citizenship or incorporation
- Country where business is conducted
Form 5472 — Part III (Related Party)
- Country of citizenship or incorporation of the related party
- Country where business is conducted
Other IRS Forms
- Form 1120 — Schedule K and other international sections
- Form 1120-F — Foreign corporation income tax return
- Form W-7 — ITIN application (country of birth, citizenship)
- Form 1040-NR — Nonresident alien income tax return
Common Mismatches: IRS Codes vs ISO Codes
The table below shows 20 countries frequently seen on foreign-owned LLC filings. Pay close attention to countries where the IRS code differs from the ISO code — these are the ones that trip people up.
| Country | IRS Code | ISO Code | Watch Out |
|---|---|---|---|
| Nigeria | NI | NG | Very common mistake |
| United Kingdom | UK | GB | ISO uses GB |
| South Korea | KS | KR | Different code |
| Taiwan | TW | TW | Same |
| China | CH | CN | Different! |
| Germany | GM | DE | Very different |
| Japan | JA | JP | Different |
| India | IN | IN | Same |
| Brazil | BR | BR | Same |
| Mexico | MX | MX | Same |
| France | FR | FR | Same |
| Canada | CA | CA | Same |
| Australia | AS | AU | Different! |
| United Arab Emirates | AE | AE | Same |
| Philippines | RP | PH | Very different |
| Singapore | SN | SG | Different |
| Vietnam | VM | VN | Different |
| Thailand | TH | TH | Same |
| Indonesia | ID | ID | Same |
| Hong Kong | HK | HK | Same |
Important: This table covers only the most common countries for foreign-owned LLC filers. The full IRS country code list contains over 250 entries. Always double-check your specific country against the official IRS list before filing.
How to Look Up Your Code
There are several reliable ways to find the correct IRS country code for your nationality or country of incorporation:
1. Form 5472 Instructions
The official instructions for Form 5472 include the complete country code list. Search for "country codes" within the instructions PDF available on IRS.gov.
2. IRS Publication 515
Publication 515 (Withholding of Tax on Nonresident Aliens and Foreign Entities) contains the full list of IRS country codes in its appendix. This is the most comprehensive reference.
3. Search IRS.gov
Go to irs.gov and search for "country codes for tax forms" to find the latest published list. The IRS occasionally updates codes when countries change names or boundaries.
4. Use ForeignLLCTax.com
Our guided filer has the correct IRS country codes built in. When you select your country from the dropdown, we automatically use the right IRS code on your Form 5472 — no manual lookup needed.
Tips for Getting It Right
Follow these guidelines to avoid country code errors on your IRS filings:
Always verify against the IRS list
Never assume that ISO codes will work on IRS forms. Even if a code looks right, check it against the official IRS country code list. Many seemingly obvious codes are wrong.
Know which fields require country codes
On Form 5472, the key fields are: country of incorporation (line 1L), country under whose laws you file (lines 1N, 1O), country of citizenship (Part II), and country where business is conducted. Each one needs the correct IRS code.
Use the same code consistently
If you reference the same country in multiple places on your filing (for example, your country of citizenship and the country where your LLC conducts business), use the identical IRS code in every field. Inconsistency raises flags.
Remember that US = "US" on all IRS forms
If your LLC is incorporated in the United States (which it should be if you have a foreign-owned US LLC), the country of incorporation is always "US." This one happens to match the ISO code.
Watch for country name changes
The IRS occasionally updates codes when countries change their official names. If you are filing for a country that has undergone a recent name change, check whether the IRS has issued an updated code.
What Happens If You Use the Wrong Code
Using an incorrect country code on Form 5472 or other IRS forms generally will not trigger a standalone penalty. However, it can create a chain of issues that are better to avoid entirely:
Processing delays
The IRS uses country codes to route and categorize filings. An unrecognized or incorrect code may cause your return to be set aside for manual review rather than processed automatically.
IRS notice requesting clarification
You may receive a letter from the IRS asking you to confirm or correct the country information on your filing. While not a penalty notice, this creates extra correspondence and delays.
Record-matching problems
The IRS cross-references your filings with other records. If the country code on your Form 5472 does not match the country code on your EIN application or W-7, it can cause matching failures that trigger additional scrutiny.
Complications with future filings
If your first filing uses an incorrect code and subsequent filings use the correct one, the inconsistency may raise questions. It is better to get it right from the start.
Bottom line: An incorrect country code alone is unlikely to result in a $25,000 penalty. But combined with other errors, it contributes to an overall impression of a carelessly prepared filing. Getting the small details right signals to the IRS that your return was prepared with care.