The payment lands on a Tuesday morning: €2,400 from a design studio in Lisbon, converted and deposited by a transfer service you set up in five minutes. There was no 1099. The client has never heard of the IRS. Nobody sent you a form, a reminder, or a warning, and the whole thing felt so frictionless that it barely felt like income at all.

That feeling is the trap. The US tax system doesn't care where your client has a mailing address. It cares where you are a taxpayer.

The rule that surprises people: citizenship, not geography

The United States taxes its citizens and resident aliens on their worldwide income. That's an unusual rule. Most countries tax based on where you live or where the money was earned. The US asks what your status is.

So if you're a US taxpayer and a client in Lisbon, Toronto, or Singapore pays you for work, that money is gross income on your return. It makes no difference whether you did the work from a Brooklyn apartment or a train in Portugal, or whether the client ever files anything with a US agency.

The missing 1099 is the part that misleads people. A 1099-NEC is an information-reporting tool for US payers. It's a courtesy to you and a cross-check for the IRS. It isn't what creates the obligation. Your obligation exists the moment you're paid, form or no form. (The same logic applies to US clients who pay you under the reporting threshold.)

The practical difference is just this: with a foreign client, nothing arrives in January to remind you. Your own records are the only trail.

You still owe self-employment tax, and this is where it stings

Most freelancers know the income tax half of the story. The part that blindsides people is the 15.3% self-employment tax, which covers both the employee and employer shares of Social Security and Medicare. It applies to net self-employment earnings from foreign clients exactly as it does for domestic ones.

Here is the detail that trips up even careful people. There's a well-known provision, the Foreign Earned Income Exclusion (Form 2555), that can exclude a chunk of income from income tax when you live and work abroad. Two things to know:

  • It only helps if you qualify. You need a tax home in a foreign country and must meet either the bona fide residence test or the physical presence test (330 full days outside the US in a 12-month period). Working from your US couch for a client overseas doesn't qualify. That's a US-based freelancer with a foreign customer, not a US expat.
  • It doesn't erase self-employment tax. Even for people who qualify, the exclusion applies to income tax, not to SE tax. The main exception is when the US has a totalization agreement with the country where you live, which can sometimes leave you paying into one country's system instead of both.

If you take one thing from this section: "I was paid abroad" doesn't remove the 15.3%.

Foreign tax withheld? You may get a credit

Some foreign clients, especially larger companies in countries with withholding rules for payments to non-residents, will hold back a portion of your invoice and send it to their own tax authority. It can feel like being taxed twice.

Usually you aren't, thanks to the foreign tax credit. Using Form 1116, you can generally claim a credit against your US income tax for qualifying income taxes paid to a foreign country. The credit is limited to the US tax attributable to that foreign income, and it doesn't offset self-employment tax. Hold on to whatever certificate or statement the client gives you showing what was withheld. Without it, the credit is hard to support.

For most freelancers with a few foreign clients and no withholding, none of this comes up. But if you see a smaller deposit than the invoice total, find out why before you assume it's a bank fee.

What number counts as your income?

This is where practical bookkeeping gets messy. Your client pays in euros, pounds, or yen. Your return needs US dollars.

The general approach: convert each payment into dollars using the exchange rate on the day you received it. The IRS also allows a consistently applied yearly average rate in many situations, and the IRS publishes yearly average currency exchange rates for this purpose. Pick a reasonable, documented method and use it every time.

Two traps are worth naming:

  1. Report gross, not net. If an invoice was €2,400 and your transfer service took a fee before the money hit your account, your income is the full amount you earned. The fee is a separate business expense you can deduct on Schedule C. Reporting only the smaller deposit understates income and hides a legitimate deduction at the same time.
  2. Hold-the-currency complications. If you keep the balance in euros rather than converting to dollars right away, the later exchange can create a separate gain or loss. For most freelancers who convert promptly, this is small. If you hold meaningful foreign-currency balances, it's worth a conversation with a tax professional.

Where it goes on your return

The good news is that the mechanics are the same as for any other freelance income. Foreign-client revenue goes on Schedule C, alongside your US income. Expenses come off the same way. Net profit flows to Schedule SE for self-employment tax and to your Form 1040 for income tax.

Two extra checks apply if you have foreign financial accounts:

  • FBAR. If the combined value of your foreign financial accounts exceeded $10,000 at any point in the year, you may have to file FinCEN Form 114. It's separate from your tax return, and the penalties for ignoring it are steep. A payout service that holds your money in a US-dollar account is a different situation from an account at a bank overseas, so check which one you really have.
  • Form 8938. Higher thresholds can trigger this one, filed with your return. It's rare for the typical freelancer.

These rules are about disclosure, not additional tax. But they're the sort of thing a person only learns about after receiving a letter.

The quarterly part nobody mentions

Because there's no withholding on most foreign payments, estimated taxes matter even more. If you expect to owe $1,000 or more after withholding and credits, the IRS expects you to pay during the year, not all at once in April. Foreign income counts toward that calculation like any other.

The risk is invisibility. Domestic clients can show up on a 1099 and remind you the income exists. A Lisbon client who pays by transfer produces nothing but a line in your account history. If you only budget for what has paper attached, you will underpay.

Your next moves

  • Tag every foreign payment today. Open your bank or payout history for this year and mark each deposit from a foreign client. Total them in a simple sheet with the date, the original currency amount, the dollar amount, and the fee.
  • Choose and write down your exchange-rate method. Either the rate on the day of receipt or a consistent annual average from a published source. One line in a notes file is enough. Consistency is the thing you're protecting.
  • Log the fees as expenses. Add up what transfer services and platforms took out of each payment, and record them separately from the gross amount.
  • Check for withholding. For any foreign client that paid you less than the invoice, ask for a statement of what was withheld and why. If tax was withheld, save it for a possible foreign tax credit.
  • Look at the year-end balance in any overseas account. If you hold accounts outside the US, find the highest balance for the year and see whether it crossed $10,000 combined. If so, look up FBAR before the deadline.
  • Add the foreign income to your next estimated payment. Rerun the numbers with the foreign income included, and send the next installment based on the full picture.

Where this fits in a tool like Payday

The reason foreign income gets missed is rarely dishonesty. It's that the information lives in too many places: a payout dashboard, a transfer app, a bank feed in a different currency. Payday connects to your Stripe account or bank and builds your quarterly estimate from the dollar amounts that actually arrived, so income from clients without a 1099 still counts toward what you owe. You can watch how it handles it, free of pressure, at payday.lumenlabs.works. Whether you use it or a spreadsheet, the goal is the same: make the quiet Tuesday deposit visible before April does it for you.