Form 2555 or Form 1116: choosing your relief from the UK

You need foreign earned income, a tax home in a foreign country, and one of two tests. The IRS lists them plainly: bona fide residence abroad for an uninterrupted period that includes a whole tax year, or physical presence abroad for 330 full days in any 12 months.

Most settled expats pass the bona fide test once a full calendar year has gone by. New arrivals usually rely on the 330-day count first. So your first year abroad can qualify, though it needs the day count done properly.

The IRS page on the exclusion sets out both tests. You claim it on Form 2555, attached to your return.

It counts full days you spend physically in a foreign country or countries, and you need at least 330 of them inside any 12 consecutive months. You can pick the 12-month window that works best, so it does not have to match the calendar year.

Days in the United States break the count, so a long trip home can cost you the test. Keep a simple travel log with dates in and out. Boarding passes and passport stamps then back it up if anyone asks.

In practice this test carries most first-year claims. The bona fide route needs a whole tax year abroad first. So a September arrival often qualifies on days well before it qualifies on residence.

The two tests also suit different lives. Frequent travelers lean on residence once it applies, because the day count gets hard to protect. Settled families rarely think about the count again after year one.

The exclusion goes on Form 2555, attached to your Form 1040. You state which test you meet, report your foreign earned income, and work out the excluded amount. The housing exclusion, where it applies, sits on the same form.

Credits go on Form 1116 instead, one form per income category. You report the foreign income, the foreign tax paid on it, and the limit that applies. Any excess then carries forward to later years.

Both need the same raw records: payslips, your P60, and statements for any other income. So the paperwork effort looks similar either way. The difference lies in what each form does to the rest of the return.

It is a dollar-for-dollar credit against US tax for income tax you paid to another country on the same income. You claim it on Form 1116, category by category, and it covers investment income as well as salary.

Because British rates usually run higher than American ones, the credit often wipes out the US tax on a UK salary. Any excess credit can then carry forward to later years, which builds a useful buffer.

The official page for Form 1116 covers the mechanics. The key point is simple: the credit works with what you paid, while the exclusion works by removing income altogether.

The exclusion takes salary out of the calculation. The credit leaves salary in and cancels the tax on it. Both can reach a nil bill, yet they leave your return in very different shapes. That difference drives everything else in this guide.

Scope is the first gap. The exclusion only touches earned income, with an annual cap that rises with inflation. Credits reach dividends, interest and rent as well. So a household with investment income often needs credits anyway.

Our FEIE calculator carries the current cap, and our foreign tax credit estimator shows the other side. Running both takes a few minutes and settles most first-year questions.

Because British tax on a salary normally exceeds the American tax on it. Credits then cancel the US bill in full, with room to spare. That spare credit carries forward, while your salary stays on the return as real earned income.

Keeping that income on the return matters more than it looks. It can support IRA contributions, and it keeps the refundable portion of the child tax credit within reach. Our guide to the child tax credit abroad explains that second point in detail.

In our practice we see the exclusion chosen by software, then discovered years later to have cost a family their refund. The bill was zero either way. The difference sat in what the zero cost them.

Where foreign tax runs low, or where credits cannot reach the income. A posting to a low-tax country is the classic case, since there is little foreign tax to credit. There the exclusion does work that credits cannot.

Some UK situations fit too. A year with unusual reliefs on the British side can leave little UK tax against a salary. Also, a few people prefer the simpler paperwork when nothing else on the return depends on earned income.

The honest answer is that it depends on the whole return, not the salary line alone. That is why the choice deserves two drafts, one each way, before anything is filed.

Yes, though not on the same dollars. You can exclude part of your earned income and claim credits on the rest, or on other income entirely. The rules then trim the credit so that tax on excluded income does not count twice.

That blend sometimes beats either pure approach. It can also add complexity that nobody maintains properly. So treat it as a modeled option rather than a default, and keep the workings with the return.

The foreign housing exclusion adds one more layer for people with high rent. It sits beside the main exclusion and has its own limits by location.

Revoking the exclusion is allowed, but it has a long tail. Once you revoke it, you generally cannot claim it again for several years without IRS consent. So the first election tends to set your path for a long time.

That is the real reason to model before electing. A choice that looks neutral in year one can block a better option in year three, just as family or income changes. Reversing course then costs time you cannot recover.

Credits carry no such lock. You can claim them year by year, and unused amounts roll forward. That flexibility is part of why they suit people whose lives abroad are still changing.

Run this before you file the first return abroad. It takes an afternoon and prevents most of the costly outcomes.

Keep both drafts afterwards. When circumstances change, you will want to see why you chose as you did.

Take an illustrative example: an American engineer in Leeds with one UK salary, two young children and a small savings account. Her British tax on the salary is higher than the US tax would be. So both routes produce a nil American bill.

With the exclusion, her return shows no tax and no refund, and nothing carries forward. With credits, the bill is still nil, but excess credit rolls into later years. The refundable child credit also stays available for her children.

Her colleague took a two-year posting to a low-tax jurisdiction instead. For him the exclusion does real work, because there is little foreign tax to credit. Same employer, same salary band, opposite answers.

The first is letting software choose. Many packages treat the exclusion as the default for anyone abroad. The return then looks fine, since a zero bill looks like a zero bill.

The second is ignoring investment income. The exclusion never reaches dividends or rent, so those still need credits. Families then run both systems without meaning to, and the interaction goes unmanaged.

The third is switching casually. Revocation carries a lockout, so a single good year is a weak reason to change a long-run position. Also watch the first-year day count, because a miscounted 330 days can unwind the whole claim.

Keep a dated travel log, your employment contract, and proof of where you live and work. Those records back up the qualifying test if anyone asks later, sometimes years after the return went in.

Keep every payslip and year-end summary as well. They support both the earned income figures and the foreign tax you paid, which feeds any credit claim.

Store the two draft returns beside them. When your circumstances change, you will want to see why you chose as you did, and what the other route would have produced.

We draft the return both ways before anything is elected, through our US federal returns service. The comparison covers tax, carryforward, IRA room and family credits, not just the headline bill. Our guide to avoiding double taxation shows how this choice fits the wider return.

If you have filed with the exclusion for years and never tested the alternative, that is worth a look. Send us the outline and we will compare the routes at a fixed fee agreed first. The IRS guide for citizens abroad carries the underlying rules. This article is general information, not personal tax advice; take advice on your own facts from a qualified US-UK adviser.