Dual Citizen British/US and online business taxes
I see no reason why a US ID would be mandatory anywhere in the UK. I'm sure they have their own tax IDs in the UK. However, if the gallery requires US persons to submit US W-9 - then yes, you're covered under that requirement.
Before this agreement, every country had laws on tax-ability of income [including Global incomes]. Quite a few individuals would get away and did not report such income and pay tax if due. In fact quite a few Multi National banks actively created products that helped US Citizens to move money outside and skip reporting. U.S. in order to step up this effort enacted FATCA; essentially as a compliance mechanism, it started with US Head quartered banks operating globally and made reporting mandatory. It stepped up efforts with other countries to ensure foreign banks also enhance reporting of US nationals.  See the benefits, quite a few countries joined up together and as part of OECD, came up with CRS. Thus going forward it will enable tax authorities in member countries to exchange financials impacting taxes. The scope is also for Companies / Organization as quite a few Companies hide away income outside the domiciled country. I have heard a rumor that due to the upcoming Common Reporting Standard the details of bank accounts, including all transactions, will be reported all around the industrialized world and want to know if this is true. Yes this is true and it is not a rumor. The exact amount of data and type of data will be agreed between member countries. However a broad framework exists on what needs to be shared. Is it really true that the Common Reporting Standard is going to cause things like this to happen?  It is very important to note; There is no new Tax Legislation. Even without FATCA/CRS, a honest tax payer was bound to pay legitimate tax due as per the existing tax provisions of the country along with the provisions of DTAA [Dual Tax Avoidance Agreements]. The CRS only enables monitoring and compliance. So if one was already tax compliant, there is nothing to worry. If one was exploiting the loop hole; how will authorities know ... well this will be curbed going forward. As a note, Canada and Australia will start CRS reporting from 2018. "US Sanctions are usually very nuanced and you should look them up yourself.  It may be widely reported that ""US sanctions X-country"" and it may be widely understood that it means all funds from anybody in that country are blocked, that USUALLY isn't the case (or ""many times"" isn't the case, I'm not going to bother quantifying that) Many times it is a comprehensive list of certain individuals and businesses that are blocked. The US Treasury publishes a list of these organizations. This misinterpretation can trickle down to companies. You would think big financial companies understand regulations, but they typically just react to how things are reported and have no uniform understanding of the financial regulations they are subject to. Private companies create unique and arbitrary company policies in reaction to the spirit of a regulation. So could it be that all Iranians cannot interact with the US financial system? Sure, thats possible. Could it be a lot more nuanced? Sure. Does it matter if the broker will actually investigate your SSN with USCIS? Maybe, maybe not. Does it matter if you disclose you are a dual citizen if they claim they can just check your SSN?  The financial institution is the one liable for misinterpreting sanctions. Let the consequences guide your actions." If you are a US resident (not necessarily citizen) then yes, you do have to pay capital gains taxes on any capital gains, including interest from assets oversees (like interest from a savings account). Additionally you have to report all your foreign bank accounts according to FATCA (https://www.irs.gov/businesses/corporations/foreign-account-tax-compliance-act-fatca). &gt; Less capital tax = less pressure on the wealthy/entrepreneurs (since you keep bigger portion of your net income, the interest to bring back business should increase) = capital inflow back to the US.  IMO, this statement makes a whole lot of assumptions that are untrue.  1) The wealthy create jobs.  I believe the opposite is true.  I think if you want more companies/jobs you should offer universal healthcare so low to middle class folks can risk leaving an established company to start on their own.  2) More money to the rich means more investment in the economy. My experience shows the rich will use the money to grow their own wealth, not everyone's. I remember a recent Bloomberg article where businessmen said they would use repatriated money for buyouts, liminting competition and growing a company's hold on the market.  3) Take home money is used for investment.  It isn't. Companies do the large investments, not individuals.  Consider Amazon looking at growing their distribution channels or Apple with their iPhone evolution.  If you make it more profitable for corporate profits to go to compensation, you leave less money for investment.  4) Companies struggle in the US due to overtaxation. This is a flat out myth. Cost of taxes for business in the US is one of the lowest for rich, educated countries and that is before the tax kickbacks (a la Foxconn) or loopholes.  5) And the bigges IMO -- the US has been fed the lie that the best thing for the citizens of the country is aligned with the best things for the country's companies. The opposite is the case. "If a country had a genuine completely flat income tax system, then it wouldn't matter who paid the tax since it doesn't depend on the employee's other income. Since not many countries run this, it doesn't really make sense for the employee to ""take the burden"" of the tax, as opposed to merely doing the administration and paying the (probable) amount of tax at payroll, leaving the employee to use their personal tax calculation to correct the payment if necessary. Your prospective employer is probably saying that your tax calculation in Singapore is so simple they can do it for you. They may or may not need to know a lot of information about you in order to do this calculation, depending what the Singapore tax authorities say. If you're not a Singapore national, they may or may not be relying on bilateral tax agreements with your country to assert that you won't have to pay any further tax on the income in your own country. It's possible they're merely asserting that you won't owe anything else in Singapore, and in fact you will have taxes to report (even if it's just reporting to your home tax authority that you've already paid the tax). Still, for a foreign worker a guarantee you won't have to deal with the local tax authority is a good thing to have even if that's all it is. Since there doesn't appear to be any specific allowance for ""tax free money"" in the Singapore tax system, it looks like what you have here is ""just"" the employer agreeing to do something that will normally result in the correct tax being paid in your behalf. This isn't uncommon, but it's also not exactly what you asked for. And in particular if you have two jobs in Singapore then they can't both be doing this, since tax is not flat. The example calculation includes varying tax rates for the first X amount of income that (I assume without checking) are per person, not per employment. Joe's answer has the link. In practice in the UK (for example), there are plenty of UK nationals working in the UK who don't need to do a full tax return and whose tax is collected entirely at source (between PAYE and deductions on bank interest and suchlike). In this sense the employer is required by law to take the responsibility for doing the admin and making the tax payments to HMRC. Note that a UK employer doesn't need to know your circumstances in detail to make the correct payroll deductions: all they need is a so-called ""tax code"", which is calculated by HMRC and communicated to the employer, and which basically encodes how much they can pay you at zero rate before the various tax rate tiers kick in. That's all the employer needs to know here for the typical employee: they don't need to know precisely what credits and liabilities resulted in the figure. However, these employers still don't offer empoyees a net salary (that is, they don't take on the tax burden), because different employees will have different tax codes, which the employer would in effect be cancelling out by offering to pay two people the same net salary regardless of their individual circumstances. The indications seem to be that the same applies in Singapore: this offer is really a net salary subject to certain assumptions (the main one being that you have no other tax liabilities in Singapore). If you're a Singapore millionaire taking that job for fun, you might find that the employer doesn't/can't take on your non-standard tax liability on this marginal income." "The IRS taxes worldwide income of its citizens and green card holders.  Generally, for those Americans genuinely living/working overseas the IRS takes the somewhat reasonable position of being in ""2nd place"" tax-wise.  That is, you are expected to pay taxes in the country you are living in, and these taxes can reduce the tax you would have owed in the USA.  Unfortunately, all of this has to be documented and tax returns are still required every year.  Your European friends may find this quite surprising as I've heard, for instance, that France will not tax you if you go live and work in Germany.   A foreign company operating in a foreign country under foreign law is not typically required to give you a W-2, 1099, or any of the forms you are used to. Indeed, you should be paying taxes in the place where you live and work, which is probably somewhat different than the USA.  Keep all these records as they may be useful for your USA taxes as well.  You are required to total up what you were paid in Euros and convert them to US$.  This will go on the income section of a 1040.  You should be paying taxes in the EU country where you live.  You can also total those up and convert to US$.  This may be useful for a foreign tax credit. If you are living in the EU long term, like over 330 days/year or you have your home and family there, then you might qualify for a very large exemption from your income for US tax purposes, called the Foreign Earned Income Exclusion.  This is explained in IRS Publication 54.  The purpose of this is primarily to avoid double taxation. FBAR is a serious thing.  In past years, the FBAR form went to a Financial Crimes unit in Detroit, not the regular IRS address.  Also, getting an extension to file taxes does not extend the deadline for the FBAR.   Some rich people have paid multi-million dollar fines over FBAR and not paying taxes on foreign accounts.  I've heard you can get a $10,000 FBAR penalty for inadvertent, non-willful violations so be sure to send those in and it goes up from there to $250k or half the value of the account, whichever is more.  You also need to know about whether you need to do FATCA reporting with your 1040.  There are indeed, a lot of obnoxious things you need to know about that came into existence over the years and are still on the law books -- because of the perpetual 'arms race' between the government and would be cheaters, non-payers and their advisors.  http://www.irs.gov/publications/p54/ http://americansabroad.org/" It is unlikely that UK tax will be due on the money -- see here: Foreign students usually don’t pay UK tax on foreign income or gains, as long as they’re used for course fees or living costs But if the UK doesn't tax you on the money then double-taxation agreements probably won't apply, and so any Italian tax due will be payable. The broker that is issuing the moneys after vesting is more than likely deducting a notional amount of tax and NI based on UK income tax laws. If you are not a UK resident, then you should pay income tax on those stock options based on your own tax residency. Best thing to do is speak directly with the broker to explain the situation, ask them to not deduct anything from your stock options - but keep in mind that you will need to declare these earnings yourself and pay the correct rate of tax. From my own personal experience, the UK employer more than likely receives the net value (after the notional tax and NI have been deducted) and in usual circumstances create a tax liability on your payslip (if you were working and had earnings). If of course this deduction is being made by the employer, then you can simply ask them to correct this (most UK payroll software will automatically deduct tax and NI for payments after leaving unless manually intervened, so they probably aren't aware if it is them doing so).