Summary of What This Blog Covers
- Choose the right state to form your business to avoid extra taxes and fees.
- Understand U.S. tax residency rules to avoid unexpected tax liability.
- Keep business and personal finances separate for clean, compliant books.
- Know when to use payroll vs. self-employment tax to stay IRS-compliant.
Let’s just name it: starting a business in a new country is both exhilarating and overwhelming.
You’re full of ideas. You’re ready to build something meaningful, something lasting. You’ve come to the United States with drive, resilience, and probably more determination than most locals will ever realize. You’re here for the opportunity and you are all in.
But as soon as you start researching how to legally form your business, open a bank account, or file your first taxes? You’re hit with a wall of confusing acronyms, IRS deadlines, state-specific rules, and conflicting Google results. You suddenly realize: no one handed you a playbook for doing this in the U.S.
That’s where we come in.
At Insogna, we’ve guided hundreds of immigrant entrepreneurs through entity formation, tax compliance, and financial strategy. We know the challenges you’re up against because we’ve seen them up close. And while there’s no one-size-fits-all path, there are definitely some common traps you’ll want to avoid.
So let’s talk about them. Here are the five most common and costly mistakes immigrant entrepreneurs make when starting a business in the U.S., and how you can confidently avoid each one.
1. Choosing the Wrong State for Entity Formation
Because where you start matters more than you think
This might surprise you, but Delaware is not always the best state to register your business.
It’s true that Delaware is popular with venture capital-backed startups and large corporations for its flexible legal framework and business court system. But for most small businesses, especially immigrant entrepreneurs who are self-funding or bootstrapping, it can be more trouble than it’s worth.
Why? Because:
- You’ll likely still need to register as a foreign entity in the state where you actually do business (yes, even online)
- You could end up paying double annual fees and compliance costs
- You’ll face unnecessary multi-state tax filings, which can be expensive and complicated
Instead, you want to register in the state where you have your physical presence, clients, or primary business activities. For many non-resident business owners and service-based entrepreneurs, that’s Texas and we love that choice.
Texas has:
- No state income tax (a big win)
- Reasonable filing and franchise fees
- A straightforward LLC and S Corporation setup process
- A fast-growing, business-friendly environment with major cities like Austin, Dallas, and Houston
How Insogna helps: We take the guesswork out of formation. We help you choose the right state and the right entity type (LLC vs. S Corp vs. C Corp) based on your goals and not some default setting.
2. Ignoring U.S. Tax Residency Rules
Because what you don’t know can definitely cost you
Let’s talk about the Substantial Presence Test, something very few new entrepreneurs realize is even a thing.
This is how the IRS decides whether you’re a U.S. tax resident, even if you’re not a citizen or permanent resident. And the moment you hit 183 days of presence in a rolling 3-year period, you’re considered a U.S. tax resident for federal tax purposes.
Translation? You may be required to:
- Report your worldwide income to the IRS
- File a 1040 instead of a 1040-NR
- Pay U.S. taxes on business income earned outside the U.S.
Oh, and if you have more than $10,000 in foreign bank accounts? You may also need to file an FBAR (Foreign Bank Account Report) with the U.S. Treasury. Missing it even by accident can result in steep penalties.
This is one of the most expensive and painful mistakes we see. And it’s completely preventable with the right guidance.
How Insogna helps: We start with a full residency and tax exposure review. Then, we help you plan around your international income, tax treaty benefits (if applicable), and FBAR filing requirements—all with one-on-one support from a licensed CPA or enrolled agent.
3. Not Separating Personal and Business Finances
Because a clean separation is your best defense and your biggest advantage
Here’s the thing: when you’re starting out, it’s tempting to treat your business like an extension of your personal life. You swipe your personal card for supplies, accept client payments into your personal PayPal account, and just “track everything later.”
But this one simple mistake can:
- Wreck your ability to take deductions
- Lead to IRS red flags (especially if you’re audited)
- Make it impossible to calculate self-employment tax or COGS (Cost of Goods Sold)
- Delay your ability to get business credit or investment
You may be a single-member LLC or just launching a service-based consultancy, but the IRS and lenders want to see a clear line between business and personal finances. And trust us so will your future self.
Start strong by:
- Opening a dedicated business checking account
- Using a business debit or credit card
- Separating your bookkeeping with tools like QuickBooks Self-Employed or QuickBooks Online
- Using proper documentation like a W9 form for contractors and 1099-K reporting if you’re on platforms like Stripe, Etsy, or PayPal
How Insogna helps: We help you set up the right financial systems, train you on tracking tools, and make sure your books are clean, audit-proof, and ready for tax time.
4. Misunderstanding Payroll vs. Self-Employment Tax
Because not all income is created equal in the IRS’s eyes
Here’s where things really get misunderstood and it’s not your fault.
If you’re an S Corporation, the IRS expects you to pay yourself a reasonable salary through payroll. Not optional. Not “when I get around to it.” Required.
If you’re not on payroll, you’re likely:
- Misclassifying your income
- Avoiding tax withholdings
- Risking IRS penalties for underpayment
On the flip side, if you’re a sole proprietor or single-member LLC (with no S Corp election), you’re responsible for self-employment tax (that 15.3% Social Security and Medicare combo) on every dollar of net income.
Where many entrepreneurs go wrong:
- Paying themselves informally
- Not setting aside enough for quarterly taxes
- Assuming all income is taxed the same way
How Insogna helps: We walk you through Form 2553 (the S Corp election), help you run payroll using Gusto or another compliant system, and coach you on salary strategy to reduce tax liability while staying in compliance.
5. Not Tracking COGS, Revenue, or Sales Metrics Early
Because what gets measured gets managed and scaled
When you’re in startup mode, tracking every penny feels like something you’ll get to “later.” But that “later” almost always turns into stress, overpayment, or a financial black hole when tax season rolls around.
Whether you sell digital products, eCommerce, or services, you need to:
- Track your Cost of Goods Sold (COGS)
- Know your gross profit margin
- Understand which products or clients are profitable
- Capture platform fees from Stripe, Shopify, or PayPal
The earlier you do this, the better decisions you’ll make.
And when the IRS asks about inventory, or your CPA asks for sales by category, you’ll already have it neatly organized.
How Insogna helps: We set up systems that integrate with your payment platforms, run monthly reporting, and help you understand what your numbers actually mean, not just what they show.
The Big Picture: You’re Not Just Starting a Business. You’re Building a Life.
Let’s zoom out for a moment.
This isn’t just about taxes. Or payroll. Or getting your entity type right.
This is about setting up a business that lasts. That scales. That creates freedom, stability, and legacy, not just stress and late nights.
And that means surrounding yourself with the right partners: people who get your ambition, your challenges, and your dreams.
At Insogna, we’re more than just accountants. We’re collaborators. Coaches. Real humans who will break down IRS forms in plain English and cheer you on as you hit each new milestone.
You Deserve More Than Compliance. You Deserve Clarity and Strategy.
If you’ve made it this far, you already know you’re serious about doing this right. You’re not here to wing it, you’re here to grow with confidence.
That’s exactly what we’re built for.
Avoid these pitfalls from day one. Partner with Insogna to get it right.
Book your free discovery session today and let’s create a personalized financial roadmap for your U.S. business together.
Because the U.S. may be a new market for you, but your vision? That’s already world-class.
Now let’s build the structure to match it.
