Quarterly IRS payments: does your LLC owe them?

Every so often the same scare goes around the non-resident LLC groups: “do I have to pay the IRS every three months?”. These are the famous estimated taxes, the quarterly payments of the U.S. tax system. And the answer, for most non-residents who invoice services through a single-member LLC, is once again no — but it pays to understand why, because the day they do apply, ignoring them costs you money in penalties.

Let's separate who actually owes them, who can sleep easy, and how the dates and the math work if you do have to pay.

What estimated taxes are

The United States collects income tax as you earn it, not in one lump at year-end. An employee has it withheld from every paycheck. But anyone with untaxed income — the self-employed, business owners, investors — has to prepay that tax themselves in four payments across the year. Those are the quarterly payments, and an individual makes them with Form 1040-ES.

The key is one word: you only prepay a tax you actually owe. If your liability with the IRS at year-end is zero, there is nothing to prepay.

The real question: who owes them?

The basic mistake is asking “does my LLC pay quarterly?”. A single-member LLC is a disregarded entity: it doesn't pay income tax as a company. The one who might owe it is the person behind it, depending on their tax situation. So the right question is: do I, as an individual, have a U.S. income tax obligation?

When do you NOT owe them?

The most common case at Devil Club: a non-resident with an SMLLC invoicing services (software, consulting, e-commerce, marketing) with no physical presence or employees in the U.S.

In that scenario there is no effectively connected income (ECI) with a U.S. business, so there is no federal income tax to pay — and therefore nothing to prepay quarterly. Your only obligation to the IRS is the LLC's information return (the pro-forma Form 1120 + 5472), which generates no payment.

Rule of thumb: if your only relationship with the IRS is the informational 5472 and you have no effectively connected U.S.-source income, there are no estimated taxes to pay. Prepaying money “just in case” protects you from nothing.

Careful, though — this is only about the IRS. Your taxes in your country of residence follow their own logic: there you may well have to report and pay on what your LLC earns. Don't confuse “I owe nothing to the IRS” with “I owe nothing anywhere.”

When DO you owe them?

There are situations where quarterly payments become mandatory:

1. You are a U.S. person (citizen or tax resident)

If you hold a U.S. passport, a green card, or meet the substantial presence test, you are taxed on your worldwide income. Your share of the LLC's profit is personal income, and if you expect to owe $1,000 or more in tax for the year, the IRS expects quarterly payments.

2. You have effectively connected U.S.-source income (ECI)

If your activity generates income effectively connected with a U.S. business (physical presence, dependents, certain U.S.-source income), you file a 1040-NR and there may be tax to prepay.

3. You rent out real estate in the U.S.

Net rental income from a U.S. property, if you elect to treat it as ECI, generates income tax — and with it, quarterly payments. We cover this in the guide to your LLC and buying U.S. real estate.

4. Your LLC is multi-member or elected C-corp taxation

An LLC with several members is taxed as a partnership and passes income through to each member, who reports it on their own return. And if the LLC elected to be taxed as a C-corporation, then the company itself pays corporate tax and makes its own quarterly payments (with Form 1120-W).

The dates and the math

The U.S. tax year is the calendar year, and the four 1040-ES payments are due roughly on April 15, June 15, September 15, and January 15 of the following year. They are not equal quarters — the IRS calendar periods are uneven, so go by those four dates, not by “every 90 days.”

To avoid falling short there is the safe harbor: if over the year you pay at least 90% of this year's tax or 100% of last year's tax (110% if your income was high), the IRS won't charge an underpayment penalty even if you end up owing a bit more.

The mistake that costs money

There are two symmetric mistakes, and both are expensive:

• The non-resident who overpays. Prepays quarters out of fear, without actually owing U.S. income tax. Getting it back means filing a return to claim the refund and waiting months. Money tied up for nothing.
• The one who does owe and ignores it. Anyone with a real obligation who doesn't prepay eats the underpayment penalty — interest the IRS computes quarter by quarter. It's exactly the kind of avoidable cost we add up in the hidden costs of an LLC.

The right way to think about it is the reverse of how it's usually framed: first you decide whether you have a real income tax obligation in the U.S., and only then do you worry about quarters. If you don't have one, estimated taxes aren't your problem — and if you're unsure what your underlying obligation even is, start by understanding what actually identifies your LLC to the IRS before prepaying a single dollar.

Quarterly payments aren't a toll for owning an LLC. They're a way to prepay a tax you already owe. With no underlying obligation, there's no quarter to pay.