10 Mistakes Non-Residents Make When Running a US LLC

Running a US LLC as a non-resident gives you access to the US banking system, payment processors like Stripe, and a credible business entity for international clients. But the flexibility of a US LLC comes with compliance obligations that many non-resident founders overlook — sometimes with devastating financial consequences.

After working with hundreds of non-resident founders, we've identified the 10 most common mistakes that cost time, money, and sometimes the LLC itself. Here's each mistake, why it happens, and exactly how to avoid it.

Mistake #1: Not Filing Form 5472

This is the single most expensive mistake on this list. Form 5472 is an IRS information return required for all US LLCs that are at least 25% foreign-owned. The penalty for not filing is $25,000 per form, per year — automatically assessed, no warnings.

Why do so many non-residents miss this? Because:

• The LLC formation company that set up your LLC probably didn't mention it
• It's an information return, not a tax return — so many people assume no income means no filing
• General-practice CPAs often don't know about it

How to Fix It

File Form 5472 with a pro forma Form 1120 every year by April 15 (or October 15 with an extension via Form 7004). Hire a CPA who specifically works with foreign-owned US LLCs — expect to pay $300-800 for this filing. If you've missed prior years, a qualified CPA can help you file late and request penalty abatement.

Mistake #2: Commingling Personal and Business Funds

Using your personal bank account for LLC transactions — or paying personal expenses from your LLC account — is called "commingling funds." It's one of the fastest ways to lose the liability protection your LLC provides.

In legal terms, commingling can lead to "piercing the corporate veil", which means a court treats you and the LLC as the same entity. If someone sues the LLC, your personal assets become fair game.

How to Fix It

• Open a dedicated US business bank account for your LLC (Mercury, Relay, or Wise Business are popular choices for non-residents)
• Never pay personal expenses from the LLC account
• When you need to take money out of the LLC, record it as an owner's draw
• When you put money into the LLC, record it as a capital contribution
• Keep these records — they're also needed for Form 5472

Mistake #3: Forgetting the Annual Report

Most US states require LLCs to file an Annual Report (some states call it a Statement of Information or Biennial Report). This is a simple filing that confirms your LLC's address, registered agent, and members — but missing it has serious consequences.

If you don't file:

1. The state charges late fees ($50-500 depending on the state)
2. Your LLC is marked as "not in good standing"
3. After a grace period (usually 1-2 years), the state administratively dissolves your LLC
4. A dissolved LLC cannot legally do business, hold bank accounts, or provide liability protection

How to Fix It

Set a calendar reminder for your state's Annual Report deadline. Here are the most popular states for non-resident LLCs:

• Wyoming — Annual Report due on the first day of the anniversary month. Fee: $60 (or $60 minimum based on assets).
• Delaware — Annual Tax due June 1. Fee: $300.
• New Mexico — No Annual Report required (one of the reasons it's popular for non-residents).
• Florida — Annual Report due by May 1. Fee: $138.75.

Mistake #4: Not Having an EIN (or Losing It)

Your LLC's EIN (Employer Identification Number) is its tax identity — the equivalent of a Social Security Number for a business. You need it for everything: bank accounts, Form 5472, payment processors, and W-9 forms.

Common EIN mistakes:

• Never applying for an EIN after forming the LLC
• Losing the EIN assignment letter (CP575) and not knowing the number
• Using a personal SSN or ITIN instead of the LLC's EIN on forms

How to Fix It

Apply for an EIN immediately after forming your LLC. Non-residents cannot use the online application — you must apply by fax (Form SS-4 to 855-641-6935) or by phone (267-941-1099, Monday-Friday, 6am-11pm ET). Processing takes 4-6 weeks by fax. Store your CP575 letter securely — you'll need it for every bank and payment processor application.

Mistake #5: Ignoring State-Level Tax Obligations

Many non-residents assume that forming an LLC in a "no income tax" state like Wyoming or Delaware means they have zero state tax obligations. This is often true, but not always.

Situations where you may owe state taxes:

• Franchise tax — Delaware charges a $300 annual franchise tax for LLCs, regardless of income
• Nexus — If your LLC has employees, inventory, or significant sales in a state with income tax, you may have tax obligations there
• Sales tax — If you sell taxable goods or services to customers in states with sales tax, you may need to collect and remit sales tax (economic nexus thresholds apply)

How to Fix It

Consult with a CPA who understands multi-state taxation for foreign-owned LLCs. For most non-resident service-based businesses, forming in Wyoming or New Mexico with no physical presence in other states minimizes state tax complexity. But don't assume — verify.

Mistake #6: Using the Wrong Registered Agent

A registered agent receives legal and compliance documents on behalf of your LLC. Every state requires one, and the agent must have a physical address in the state of formation.

Common registered agent mistakes:

• Using your own address (which you can't, since you're not a US resident)
• Using a cheap service that doesn't forward documents promptly
• Letting the registered agent service lapse without assigning a new one

How to Fix It

Use a reputable registered agent service. Popular options for non-residents include Northwest Registered Agent ($125/year), Registered Agents Inc. ($100/year), and Wyoming Agents ($50/year for Wyoming LLCs). Ensure they forward documents via email, not just physical mail — you need to receive legal notices quickly regardless of your location.

Mistake #7: Not Keeping Bookkeeping Records

Many non-resident founders operate their LLC without any form of bookkeeping. They invoice clients, receive payments, and pay expenses — but never record these transactions systematically.

The consequences hit at tax time:

• Your CPA can't prepare Form 5472 without transaction records
• You can't accurately report capital contributions and owner's draws
• If the IRS requests documentation, you have nothing to provide
• You lose track of deductible business expenses

How to Fix It

At minimum, maintain a monthly record of:

1. All income received (with invoice references)
2. All expenses paid
3. All transfers between your personal and LLC accounts (capital contributions and draws)
4. Bank statements reconciled monthly

Use a simple spreadsheet, Wave (free), or QuickBooks ($30/month). The tool matters less than the consistency — update it at least monthly.

Mistake #8: Not Separating Multi-Currency Transactions

Non-resident founders often receive payments in multiple currencies — USD from US clients, EUR from European clients, GBP from UK clients. When these all flow into the same account without proper tracking, the bookkeeping becomes a mess.

How to Fix It

• Use a multi-currency account like Wise Business that holds balances in different currencies
• Record each transaction in its original currency AND the USD equivalent (using the exchange rate on the transaction date)
• Track foreign exchange gains and losses — these are reportable for tax purposes
• Use invoicing software that supports multi-currency invoicing with automatic conversion tracking

Mistake #9: Choosing the Wrong State for Formation

Many non-residents default to Delaware because it's the most famous state for incorporation. But Delaware isn't always the best choice for a single-member LLC owned by a non-resident.

Delaware downsides for non-residents:

• $300 annual franchise tax (even with zero revenue)
• More complex compliance requirements
• Higher registered agent costs compared to Wyoming or New Mexico

Better Options

• Wyoming — No state income tax, low annual report fee ($60), strong privacy protections, LLC-friendly laws. Best all-around choice for most non-residents.
• New Mexico — No Annual Report requirement, no state income tax on foreign-source income, very low formation costs. Best for founders who want minimal ongoing compliance.
• Florida — Good if you plan to eventually establish US residency in a no-income-tax state.

Mistake #10: Not Planning for Ongoing Costs

Many non-residents form a US LLC excited about the possibilities but don't budget for the ongoing costs. Then they're surprised when annual expenses add up.

Here's a realistic annual cost breakdown for a non-resident US LLC:

Total: approximately $500-2,000 per year, depending on your choices. Budget for this before forming the LLC.

The Non-Resident LLC Compliance Checklist

Use this checklist to make sure you're not making any of these mistakes:

1. Form 5472 filed annually by April 15 (or October 15 with extension)
2. Separate LLC bank account — no commingling with personal funds
3. Annual Report filed on time with the state
4. EIN obtained and CP575 letter stored securely
5. State tax obligations reviewed with a CPA
6. Registered agent active and forwarding documents
7. Monthly bookkeeping records maintained
8. Multi-currency transactions tracked with exchange rates
9. Formation state chosen based on actual needs (not just brand recognition)
10. Annual costs budgeted and accounted for

Conclusion: Compliance Is the Cost of Doing Business

Running a US LLC as a non-resident is one of the best business decisions an international founder can make — but only if you handle the compliance correctly. The 10 mistakes above are all avoidable with basic planning, a good CPA, and a few calendar reminders. The cost of compliance ($500-2,000 per year) is a fraction of the penalties for non-compliance ($25,000+ for Form 5472 alone). Treat compliance as a non-negotiable business expense, not an afterthought.