Foreign-income returns have a hard reputation, and they earn it. The reason usually given, though, is the wrong one. These rules are no harder to read than the rest of the individual code, and the arithmetic at the end of them is ordinary.
The difficulty is that so little of the work is arithmetic. A domestic return mostly asks a preparer to compute. A foreign-income return asks first for characterization — a decision about what each fact legally is. Those decisions all have to be settled before a single figure goes on a form, and several of them cannot be revisited later without cost.
What follows is the sequence, in the order we work it. Eight decisions, most of them made before anyone opens the software.
1. Who is filing, and as what
Residency comes first. Citizenship settles it for a US citizen. For everyone else it turns on the substantial presence test, a weighted count of days across three years that has to reach 183.
The answer decides whether the client files Form 1040 as a resident, taxed on worldwide income, or Form 1040-NR as a nonresident, taxed on much less. A treaty can override the day count through its tie-breaker article. A client who arrived or left partway through the year may be dual-status, which means two computations inside one filing. Nothing else in the return can be settled until this is.
2. What the money actually is
The phrase "foreign income" does no work by itself. The return needs to know whether a payment is wages, self-employment income, a pension distribution, investment income, or a distribution from an entity. A foreign payer will not tell you. There is no Form W-2 and no Form 1099 — what arrives is a payslip summary in another language, or nothing at all.
This reaches past labelling. A US citizen who is self-employed abroad still owes self-employment tax, and no exclusion removes it, unless a totalization agreement under a social security treaty covers them.
3. Which year, and at what rate
The US tax year is the calendar year. Much of the world disagrees. The United Kingdom runs 6 April to 5 April, India 1 April to 31 March, Australia 1 July to 30 June.
So a client's foreign documents rarely line up with the return, and someone has to rebuild twelve calendar months out of two overlapping foreign years. Then every figure needs translating into dollars, and the correct rate depends on the item — some amounts convert at the transaction-date rate, others at an average for the year. This is the point where a translation workpaper either exists or the number cannot be defended later.
4. Exclusion or credit
Two provisions relieve double taxation, and they are not alternatives chosen by preference.
Form 2555, the foreign earned income exclusion, excludes earned income up to an annual limit, but only earned income, and only where the client meets a bona fide residence or physical presence test. Form 1116, the foreign tax credit, credits foreign taxes actually paid against US tax on the same income, reaches unearned income too, and produces carryovers — one year back, ten years forward.
The interaction is where these returns go wrong. Excluded income cannot also generate a credit, so claiming the exclusion can strand foreign taxes that would otherwise have been usable. And the election is sticky: revoke Form 2555 and the client cannot elect it again for five years without the consent of the IRS. That is a decision taken in one October that binds the next five.
5. The reporting layer is separate from the tax layer
A return can owe no additional tax and still be seriously delinquent, because the reporting obligations run on their own track.
FinCEN Form 114, the FBAR, reports foreign financial accounts once the aggregate balance passes $10,000 at any point in the year. It goes to Treasury rather than with the return, and it captures accounts the client merely signs on — an employer's account, a parent's account held jointly.
Form 8938, the statement of specified foreign financial assets, goes with the return, starts at higher thresholds that vary with filing status and residence, and covers assets an account-based test misses.
The two overlap without matching; settling one does not settle the other.
6. Whether anything is a PFIC
This is the item that separates a desk which does this work from one that has read about it.
A passive foreign investment company, or PFIC, is not an exotic structure. It is an ordinary non-US mutual fund or exchange-traded fund. A client who invested through a bank in Dublin, Mumbai or Singapore almost certainly holds one, and each holding needs its own Form 8621.
The default regime taxes an excess distribution at the highest ordinary rate in force for each year it accrued and adds an interest charge, which is punitive by design. Two elections avoid it, both year-sensitive. A qualified electing fund election needs an annual information statement from the fund, which non-US funds frequently do not produce. A mark-to-market election needs the shares to be marketable. Finding a PFIC in year six is a materially worse problem than finding it in year one.
7. Pensions, trusts and entities
Foreign retirement arrangements are the most commonly mischaracterized item in this work. Some are pensions for US purposes. Some are grantor trusts, which pulls in Form 3520 and Form 3520-A and their separate penalties. Some are neither, and are taxed currently on the growth inside them. The plan's name tells you nothing. The governing documents do.
Ownership in a foreign company or partnership adds Form 5471 or Form 8865 — long forms carrying penalties that begin at $10,000 per form per year and do not wait for any tax to be due.
8. What to do about the years already missed
Frequently the facts predate the return in front of you. The client has held the account for nine years and reported none of it.
There is a defined path. The Streamlined Foreign Offshore Procedures cover a non-willful taxpayer who meets a non-residency test, and can eliminate the penalties. The Streamlined Domestic Offshore Procedures cover a non-willful taxpayer who does not meet it, at the cost of a 5 percent penalty on the highest aggregate value of the foreign assets. Both require a signed non-willfulness certification, which is a judgment about a client's state of mind and belongs to a credentialed person.
The route that does not exist is quietly amending the prior years and hoping. The IRS has said plainly that this is not an approved path, and taking it forfeits the relief the procedures give.
The decisions that cannot be taken back
Read the eight together and a pattern shows up. Most of them are difficult and also durable. A revoked exclusion locks five years. An election missed in a PFIC's first year cannot be made cheaply in its sixth. A non-willfulness certification, once signed, is signed. An unfiled Form 5471 accrues penalties whether or not any tax was owed.
That is why this work should not be judged on how quickly it comes back. It should be judged on how it is reviewed. One preparer's view of eight durable characterizations is one person's reading of the facts, however good that person is. A second enrolled agent reading the same file, before it ever reaches your firm, is the control that actually catches this class of error.
The error is almost never in the arithmetic, which is the only place software would have flagged it.
One thing your state will not do for you
Federal treatment does not carry across to the states. Several begin from federal adjusted gross income and then decline to recognize the foreign earned income exclusion, California being the well-known example. A return that is right federally can be understated by the whole excluded amount at state level — a small point that generates a large notice.
None of this is unusual here. It is the file we open most mornings, which is the argument for sending these returns out: eight durable decisions are better made by people who make them every week, then checked by somebody else.
Our desk prepares foreign-income returns — Forms 2555, 1116, 8621, 5471, FinCEN Form 114 and Form 8938, including Streamlined filings — alongside domestic 1040, 1120-S and 1065 work. Your firm stays preparer of record: your letterhead, your client, your signature. Two-EA review on every return. Preparing US returns since 2003 — 5,300+ tax returns filed in the last 4 seasons.