Bookkeeping for Expats in New York City

Living in Lisbon or Singapore does not switch off a United States filing duty. A citizen or green card holder reports worldwide income no matter where the mail goes, so the books behind a consulting practice or a rental unit still have to hold up under review. Bookkeeping for expats in New York City means keeping a United States set of books for a United States activity while you sit six or twelve time zones away from it. The work itself is unglamorous. Every month we pull the bank and card feeds and categorize each line to a real account. Every entry gets matched to a source document, and the period gets closed so that nothing is waiting for April. The IRS sets out the baseline duty in its recordkeeping guidance, and Publication 583 walks through what a business keeps and for how long. Neither one demands a particular software package. Both demand that a stranger can trace a number on the return back to a document.

New York adds a layer that an expat from Miami or Austin never has to think about. If you kept your New York domicile when you moved abroad, New York still treats you as a resident and taxes all of your income, and the New York City resident tax of roughly 3.876 percent sits on top of a state rate that climbs toward 10.9 percent. If the unincorporated business still operates inside the five boroughs, the New York City Unincorporated Business Tax of about 4 percent can reach that business income. Books that keep New York City activity separate from everything else are what let us answer a residency question with evidence instead of a shrug. The New York Department of Taxation and Finance publishes the domicile factors and the 183-day statutory residency count that drive those audits, and a clean ledger is the cheapest evidence you will ever produce.

Here is a worked example. You moved to Berlin in 2025 and left a single member consulting LLC behind with a client base in Manhattan. During 2026 the LLC bills 96,000 dollars. Your bank feed also shows 12,000 dollars of card charges that were never categorized and are parked in a suspense account. Closed properly, 9,400 dollars of that turns out to be deductible software and contractor cost that belongs on Schedule C, and the remaining 2,600 dollars is personal spending that belongs nowhere near the return. Left alone, that 12,000 dollars either vanishes from the return, which overpays tax at a combined New York City rate that can pass 45 percent, or it gets claimed with nothing behind it. The second outcome is the one that falls apart in an examination.

The common mistake is predictable. Expats run one bank account for a Berlin life and a New York business because opening a second account from abroad is a paperwork chore and the flight is next week. Six months later the books are an archaeology project and the deduction record rests on memory. Open the separate account before you leave, and keep receipts in a dated cloud folder rather than a camera roll. Publication 463 spells out what travel and meal substantiation actually requires, and memory does not meet it.

We handle the monthly close through our bookkeeping service and then hand a finished trial balance to the team preparing your individual tax returns. If the entity structure or the New York residency position needs a harder look, that belongs in tax strategy consulting rather than in the ledger. Set the account structure and the categorization rules during your first month abroad, and the three filing seasons that follow get quieter instead of louder.

The IRS wants a United States dollar answer. Your ledger can record a Lisbon invoice in euros, but the number that reaches Schedule C has to be translated into dollars, and the translation method has to hold steady from January through December. Most expat owners use the spot rate on the date of each transaction. That is the cleanest approach at low volume, and it is the only one that survives when a single receipt gets questioned. An average annual rate is defensible for a set of books that runs steadily in one foreign currency all year. What is not defensible is switching between the two depending on which produces the smaller number. The IRS recordkeeping guidance and Publication 583 both assume a consistent method sitting behind the totals.

Pick a published rate source, write down which one you picked, and store the daily rates in the same folder as the receipts. When a bank feed imports in euros and your software converts at whatever rate it grabbed overnight, you end up with two versions of the same month and no way to say which one is real. Bookkeeping for expats in New York City is mostly this kind of housekeeping. It is cheap to do monthly and expensive to reconstruct in March. Foreign bank and brokerage accounts can also carry reporting duties that sit outside the income tax return entirely, with their own thresholds and their own penalties, and those are worth scoping in your first month abroad rather than in the last week of filing season.

A worked example shows the size of the problem. You pay a Lisbon subcontractor 1,000 euros on the first of every month. Translated at the spot rate on each payment date, the year comes to 12,940 dollars of contractor expense. Translated at a single year end rate that you picked in April because it was convenient, the same twelve payments come to 12,000 dollars. The 940 dollar gap is not really the issue. The issue is that one file now holds two methods, and an examiner who finds the second method will not stop at the currency question. Those payments also drive an information return question. If that subcontractor were a United States person, the payments would land on Form 1099-NEC, and the deduction itself has to clear the ordinary and necessary standard described in Publication 535.

The common mistake is letting accounting software auto convert everything and never checking the rate it used. Software defaults change without telling you. A rate pulled at midnight in one time zone is not the rate on your invoice date, and after twelve months of quiet drift the euro expenses on your books will not tie to any statement you can produce for anyone. Lock the setting, then reconcile one full month by hand before you trust the other eleven. New York matters here too, because a New York residency examiner reading a reconstructed year starts with the method and works outward from it.

Our bookkeeping team sets the currency policy at onboarding and documents it in the file, so the people preparing your individual tax returns are not guessing in March about which rate produced which number. When a currency question turns into a structural question, for example whether a foreign entity you formed abroad creates a United States filing obligation of its own, that conversation moves to tax strategy consulting. Decide the method in month one and every year after that translates itself.

Start with the categories the IRS names. You keep the documents that support income, the documents that support deductions, and the documents that establish the basis of property you own. The IRS recordkeeping page and Publication 583 lay this out without ceremony. What they ask for is traceability. For an expat, the person reading your file may be doing it four years after you have moved countries twice, which is exactly why dated cloud folders beat a shoebox in a Brooklyn storage unit that you cannot reach from Bangkok.

The retention clock is not one number, and this is where people guess wrong. The general assessment period runs three years from filing. It stretches to six years when more than 25 percent of gross income is left off a return, and it never begins at all if no return was filed. Property records outlive both. If the business buys equipment, the basis records have to survive until the assessment period closes on the year you finally dispose of it, which can sit a decade out. Publication 551 covers basis and Publication 946 covers the depreciation that rides on top of it. If you have any United States employees, payroll records carry a separate retention period of at least four years under the IRS employment tax rules.

A worked example makes the point. In 2026 your consulting LLC buys 12,000 dollars of camera and computer equipment for a New York City client project. Part of it gets expensed and the rest gets depreciated on Form 4562. You sell the kit in 2031 for 3,000 dollars. The gain or loss in 2031 rests entirely on basis math done in 2026. If the 2026 invoice is gone, you are arguing from a bank statement that shows only 12,000 dollars leaving an account, with nothing to show what it bought or when it was placed in service. That is a weak position and a self inflicted one.

The common mistake for expats is assuming the foreign side keeps the record for you. A German bank statement is not a receipt. It shows an amount and a merchant name, not a business purpose, and business purpose is precisely what Publication 463 asks for on travel and meals. Photograph the receipt at the moment of purchase and drop it in a month folder. Ninety seconds in Berlin replaces two hours in March. If your own copies are already gone, an IRS transcript can rebuild what was reported but never what supported it, and you request one with Form 4506-T or through the IRS get transcript service. A transcript proves a number was filed. It does nothing to prove the number was right, which is the whole reason the underlying documents matter.

Bookkeeping for expats in New York City has a second retention wrinkle that federal rules do not cover. A New York domicile audit can reach back years and turns on day counts, lease documents, and utility patterns rather than receipts, so the residency file has to be kept alongside the business file. Our bookkeeping engagement stores documents next to the ledger so nothing depends on a phone stolen at a Barcelona train station, and the same file feeds your individual tax returns. If you are several years behind and unsure where to begin, you can request a consultation and we will scope the cleanup before any work starts. Build the archive while the documents still exist and the later years defend themselves.

The books are not the point. The return is the point, and the books are what make the return defensible. When a month closes, the trial balance produces a net profit figure that lands on Schedule C for a consulting practice or Schedule E for a rental. That single figure then drives two separate bills on Form 1040. The first is income tax. The second is self employment tax at 15.3 percent, computed on Schedule SE, and this is where expats meet an unpleasant surprise.

The foreign earned income exclusion is an income tax provision. It does not reach self employment tax. An expat consultant can push a large slice of earned income out of the income tax calculation and still owe the full 15.3 percent on net self employment earnings, unless a totalization agreement with the country of residence puts you into that country’s social insurance system instead. That one distinction is the most common reason an expat’s estimated payments come up short by thousands of dollars. Bookkeeping for expats in New York City is what surfaces the number early enough to do something about it.

Estimated taxes run on a calendar that does not care where you live. The IRS estimated taxes hub and Form 1040-ES set the 2026 dates at April 15, June 15, September 15, and January 15 2027. Publication 505 explains the safe harbor that most expat owners should be using, which is paying 100 percent of the prior year tax, or 110 percent once adjusted gross income passes 150,000 dollars. Miss it and the underpayment penalty gets computed on Form 2210. Being abroad on the regular due date buys an automatic two month extension to file to June 15, but interest still runs from April 15, so the extension is not a payment holiday.

Worked example. Your first quarter close shows 12,000 dollars of net profit. Self employment tax alone on that quarter is roughly 12,000 dollars times 0.9235 times 0.153, or about 1,695 dollars, before any income tax. Add federal income tax and, if you kept New York domicile, add New York State plus the New York City resident tax of about 3.876 percent. A 12,000 dollar quarter can easily carry more than 4,000 dollars of combined tax. An owner who has not closed the books does not know that number until the year is over and all four payment dates have passed.

Paying from abroad has its own friction. IRS Direct Pay draws from a United States bank account, and an expat who closed the last domestic account on the way out of the country finds out in June that there is nothing to draw from. Keep one United States account open purely as a tax payment rail. Foreign wires are possible but slower and easier to misapply, and a payment that posts to the wrong year turns into a notice you get to unwind from a different time zone. The IRS payments page lists the current options.

The common mistake is treating the business bank balance as profit. Money sitting in the account has not had tax carved out of it, and the client deposit that arrived in December is income even though the work happens in February. Our bookkeeping close produces a quarterly tax reserve figure rather than a guess, and that figure follows through to your individual tax returns without a scramble. Fund the reserve on the day each month closes and the April surprise stops being an annual event.

A Manhattan rental behaves differently from a consulting practice. Rental income and expenses land on Schedule E, and Publication 527 is the plain language guide to how that works, including what counts as a day of personal use. The moment you keep the apartment available for your own visits home, the expense allocation shifts. An expat who flies back for three weeks each August has a real allocation question rather than a theoretical one, and the answer depends on records kept contemporaneously rather than remembered later.

Keep one set of books per property and never blend a second unit into the same ledger. The most consequential monthly decision is repair versus improvement. A worked example: you spend 12,000 dollars on the apartment during 2026. Repainting a hallway is generally a repair and comes off this year. A kitchen renovation is an improvement, which gets capitalized and recovered over 27.5 years through Form 4562 under the rules in Publication 946. On a 12,000 dollar improvement that is roughly 436 dollars a year. The difference between deducting 12,000 dollars now and 436 dollars a year is not a rounding question, and pushing an improvement into the repair column invites an adjustment plus interest. Publication 551 covers the basis side of that entry.

Losses may not land where you expect. Passive activity rules in Publication 925 can suspend a rental loss for an expat with a high foreign salary, holding it until you dispose of the property. That is not a lost deduction, it is a deferred one, but only if the suspended balance gets tracked year over year. Books that get rebuilt from scratch every spring tend to drop that carryforward, and nobody notices until the sale year, when it would have been worth real money.

New York sits on top of all of it. If you kept your New York domicile, you file as a resident and report worldwide income. If you have genuinely broken domicile, New York still taxes New York source rental income on a nonresident return, so the property keeps you in the system either way. The city question is narrower than people assume. New York City generally treats holding and leasing real property for your own account as outside the Unincorporated Business Tax, but the line moves once services get layered on, so the classification deserves a look rather than an assumption. The New York Department of Taxation and Finance is the source for both pieces, and the answer changes the moment your use of the building changes.

The common mistake is netting the property manager’s statement. The manager collects 4,000 dollars, keeps a fee, and wires you the rest, so the owner books only what hit the bank. Gross rent and the management fee both belong on the return as separate lines. Netting understates gross income, and understated gross income is how a return drifts toward the six year assessment window. Our bookkeeping team books the gross and the fee from the manager statement each month, and that ledger feeds your individual tax returns along with the depreciation schedule and any suspended losses. Decide the repair and improvement policy now, and the eventual sale of that apartment will compute itself from records you already own.