5 hidden costs of opening a US LLC (and what each one runs you)

A client we'll call LINCE ran the numbers before forming his LLC: so many dollars for registration, so many for the registered agent the first year, and done. "That's it, right?" The problem wasn't what he paid to open it — he had that crystal clear — but everything that came afterward, the part nobody had put on his spreadsheet. An LLC that's cheap to open can get expensive to keep, and the gap lives in five costs that almost never show up on the headline price.

They're not traps or malicious fine print: they're the normal costs of keeping a company alive in another country. But if you don't see them coming, they hit all at once and catch you by surprise. Let's bring them into the light one by one, so your spreadsheet is the real one and not the optimistic one.

Disclaimer: this is operational content based on what we see with real clients, not legal or tax advice. The exact amounts vary by state, provider and year; treat them as orders of magnitude, not a fixed rate.

1. The registered agent renewal, every year

The registered agent (RA) isn't a one-time setup fee you pay once: it's an annual subscription that renews for as long as the LLC stays alive. It's your company's legal address in the state, and without it the state can stop recognizing the LLC as active. Most people remember the first-year cost because it's bundled into the formation pack, and forget that the second, the third and the tenth year are paid too.

LINCE's typical mistake: treating the RA as part of the price to "open" when it's really part of the price to "keep." It isn't expensive — it's the most predictable fixed cost of all — but it's recurring, and it belongs in the budget every year, not just the first.

2. The annual tax filing, income or not

This is the surprise that stings the most. A single-member LLC with a foreign owner is required to file every year a pro-forma Form 1120 with the attached Form 5472, even if it never invoiced a single dollar, even if the account has been at zero for months. The filing doesn't depend on whether you make money: it depends on the company existing. What it really costs to do it properly each year we break down in the real cost of the 1120 + 5472.

And here the hidden cost isn't just filing it right, but not filing it: the penalty for failing to submit the 5472 on time starts at 25,000 dollars. It's the kind of figure that turns an "I'll get to it" into a serious problem. The specific mistakes that trigger IRS letters over this form we break down in the 4 Form 5472 mistakes.

An LLC doesn't cost what you pay to open it; it costs what you pay to keep it alive and compliant every year. The headline price is just the entry ticket.

3. Bank fees and currency conversion

Opening the business account is usually free, but moving the money isn't. Every international transfer, every conversion of dollars into your currency and every withdrawal to your personal account can carry a fee — and, above all, a spread on the exchange rate that doesn't show up as a "fee" but costs you all the same.

For a non-resident who earns in dollars and spends in another currency, that exchange spread is a constant drip that, added up over the year, weighs more than any flat charge. It's not a cost you can eliminate, but it is one you can reduce by choosing well where and how you move money. If you're at that decision point, it pays to understand how the account is opened and used before you start moving balances — we cover it in how to open your Mercury account.

4. The cost of closing it properly

Nobody forms an LLC planning to close it, but the exit has a price too — and it costs more if done late or badly. Dissolving an LLC means filing the dissolution document with the state, doing the final tax filing and cancelling the registered agent, in that order. Until you do, the company stays alive in the eyes of the state and keeps accruing obligations.

The hidden cost here is inertia: if you stop operating but don't dissolve, you end up paying another RA renewal and, maybe, another tax filing for a company you no longer use. Closing it on time is, in practice, saving yourself a whole year of fixed costs on a dead entity that doesn't know it's dead.

5. The cost of having set it up cheap

The most expensive cost of all is usually the one disguised as savings. Forming the LLC on the cheapest platform, with a badly handled EIN, an address the bank won't accept or a phantom registered agent, isn't free: it's deferred. The cost arrives later, when you have to redo what was done wrong — recover an EIN, fix a filing, switch agents, reopen an account that got bounced.

That rework almost always costs more than doing it right from the start, because on top of the amount you pay the time lost and, sometimes, a penalty along the way. The honest spreadsheet doesn't compare the price to open: it compares the total cost of keeping the LLC running and compliant for years. That full breakdown, piece by piece, is in the real cost of an LLC. And if your case does have income tax to prepay, watch out for the penalty on not doing it in time: how the IRS quarterly payments work is exactly the kind of avoidable cost worth checking first.

How it played out with LINCE

With LINCE we rebuilt the real spreadsheet: to the price to open we added the annual RA renewal, the mandatory tax filing even with no revenue, the drip of exchange fees and a provision for the day he wants to close. The final figure wasn't alarming — it was still well worth it — but it was double what he had in his head, and that changes how you decide.

What LINCE walked away with wasn't fear, but a budget that wouldn't surprise him. An LLC is an excellent tool for a non-resident; what ruins the experience isn't its real cost, but the cost nobody told you about. Seeing it all upfront is the difference between an investment you control and a subscription that gets away from you.

Checklist: does your budget cover all five?

Before you call your spreadsheet good, check that none of these five slipped off the page:

• Are you counting the RA renewal every year? It's not a setup fee: it's recurring for as long as the LLC lives.
• Have you budgeted the annual tax filing? The pro-forma 1120 + 5472 is mandatory even with no income.
• Have you estimated bank and exchange fees? The currency spread weighs more than any flat charge.
• Have you planned the exit? Closing late costs you another year of fixed costs on a dead company.
• Are you comparing the cost to keep it, not just to open it? What's cheap to set up can get expensive to maintain.

A well-budgeted LLC has no hidden costs: only costs you chose not to look at. The five we just walked through are perfectly manageable when you put them on the sheet from the start; what hurts is discovering them one by one, off-schedule and with a surcharge. The difference between a good investment and a bad surprise isn't the entry price — it's having added it all up before you go in.