What foreign exchange rate is used for foreign credit card and bank transactions?
A lot of questions, but all it boils down to is: . Banks usually perform T+1 net settlements, also called Global Netting, as opposed to real-time gross settlements.  That means they promise the counterparty the money at some point in the future (within the next few business days, see delivery versus payment) and collect all transactions of that kind. For this example say, they will have a net outflow of 10M USD.  The next day they will purchase 10M USD on the FX market and hand it over to the global netter.  Note that this might be more than one transaction, especially because the sums are usually larger. Another Indian bank might have a 10M USD inflow, they too will use the FX market, selling 10M USD for INR, probably picking a different time to the first bank.  So the rates will most likely differ (apart from the obvious bid/ask difference). The dollar rate they charge you is an average of their rate achieved when buying the USD, plus some commission for their forex brokerage, plus probably some fee for the service (accessing the global netting system isn't free). The fees should be clearly (and separately) stated on your bank statement, and so should be the FX rate. Back to the second example: Obviously since it's a different bank handing over INRs or USDs (or if it was your own bank, they would have internally netted the incoming USDs with the outgoing USDs) the rate will be different, but it's still a once a day transaction.  From the INRs you get they will subtract the average FX achieved rate, the FX commissions and again the service fee for the global netting.  The fees alone mean that the USD/INR sell rate is different from the buy rate. On Credit Cards [I am assuming you have a Visa or Master card], the RBI does not decide the rate. The rate is decided by Visa or Master. The standard Sheet rate for the day is used. Additionally SBI would mark it up by few paise [FX mark-up spread]. This is shown as mark-up fee. The rate of USD Vs INR changes frequently. On large value [say 1 million] trades even a paise off makes a huge difference and hence the rate is constantly changing [going up or down]. The rates offered to individuals are constant through out the day. They change from day to day and can go up for down. Recently in the past 6 months if you read the papers, Rupee has been going down and is at historic low. On a give day there are 2 rates; - Bank Buy Rate, ie the rate at which Bank will BUY USD from you. Say 61. So it will buy 100 USD and give you Rupees 6100. - Bank Sell rate, ie the rate at which Bank will SELL USD to you. Say 62. So if you want 100 USD, you need to give Bank 6200. The difference between this is the profit to bank. In addition to the SELL rate on the statement transaction day, currency conversion fees of 0 - 3% is applied, depending on the card issuing bank.
"No.  This is too much for most individuals, even some small to medium businesses.  When you sell that investment, and take the cheque into the foreign bank and wire it back to the USA in US dollars, you will definitely obtain the final value of the investment, converted to US$. Thats what you wanted, right?  You'll get that.  If you also hedge, unless you have a situation where it is a perfect hedge, then you are gambling on what the currencies will do. A perfect hedge is unusual for what most individuals are involved in. It looks something like this:  you know ForeignCorp is going to pay you 10 million quatloos on Dec 31.  So you go to a bank (probably a foreign bank, I've found they have lower limits for this kind of transaction and more customizable than what you might create trading futures contracts), and tell them, ""I have this contract for a 10 million quatloo receivable on Dec 31, I'd like to arrange a FX forward contract and lock in a rate for this in US$/quatloo.""  They may have a credit check or a deposit for such an arrangement, because as the rates change either the bank will owe you money or you will owe the bank money. If they quote you 0.05 US$/quatloo, then you know that when you hand the cheque over to the bank your contract payment will be worth US$500,000.  The forward rate may differ from the current rate, thats how the bank accounts for risk and includes a profit. Even with a perfect hedge, you should be able to see the potential for trouble.  If the bank doesnt quite trust you, and hey, banks arent known for trust, then as the quatloo strengthens relative to the US$, they may suspect that you will walk away from the deal.  This risk can be reduced by including terms in the contract requiring you to pay the bank some quatloos as that happens.  If the quatloo falls you would get this money credited back to your account.  This is also how futures contracts work; there it is called ""mark to market accounting"".  Trouble lurks here.  Some people, seeing how they are down money on the hedge, cancel it.  It is a classic mistake because it undoes the protection that one was trying to achieve.  Often the rate will move back, and the hedger is left with less money than they would have had doing nothing, even though they bought a perfect hedge." Update, 2013: this product is no longer available. As of December 1, 2010, Travelex announced a product, the Travelex Cash Passport, which is chip-and-pin protected. You can buy it in the US and then load it up with either Euros or British Pounds. There are a few things to know about this: Right now, it is not available online at the Travelex website. You must purchase it in person at participating Travelex retail locations. I bought mine right downstairs from the Stack Overflow world headquarters! The fees that Travelex charges for foreign currency transactions will take your breath away. I purchased a £300 card for $547.15, which comes out to a 15% service charge. Travelex will give you better rates if you purchase larger amounts. There is a further 3% fee if you use a credit card (I used a debit card to avoid this). Think long and hard about whether to load it with Pounds or Euros. They charged me 5.5% above the interbank exchange rate to spend my Pound card in Euros. You get two cards, which is very convenient. You can refill the card on the web. Due to the high fees, the Chip and PIN Cash Passport is not a good idea for everyday transactions, for getting cash from an ATM, and certainly not for paying for big-ticket items like hotels. You're going to want to reserve it for purchasing things from those automated kiosks in Europe (especially gas stations, ticket machines in train stations, and toll booths) that will not work with a standard magnetic stripe card. The card worked perfectly buying tickets on the tube in London. I haven't had a chance to check it out in other countries. "Since you did not treat the house as a QBU, you have to use USD as your functional currency.  To calculate capital gains, you need to calculate the USD value at the time of purchase using the exchange rate at the time of purchase and the USD value at the time of sale using the exchange rate at the time of sale.  The capital gain / loss is then the difference between the two.  This link describes it in more detail and provides some references: http://www.maximadvisors.com/2013/06/foreign-residence/ That link also discusses additional potential complications if you have a mortgage on the house. This link gives more detail on the court case referenced in the above link: http://www.uniset.ca/other/cs5/93F3d26.html The court cases references Rev. Rul 54-105.  This link from the IRS has some details from that (https://www.irs.gov/pub/irs-wd/0303021.pdf): Rev. Rul. 54-105, 1954-1 C.B. 12, states that for purposes of determining   gain, the basis and selling price of property acquired by a U.S. citizen living in a foreign country should be expressed in United States dollars at the rates of exchange prevailing as of the dates of purchase and sale of the property,   respectively. The text of this implies it is for U.S. citizen is living in a foreign country, but the court case makes it clear that it also applies in your scenario (house purchased while living abroad but now residing in the US): Appellants agree that the 453,374 pounds received for their residence should be translated into U.S. dollars at the $1.82 exchange rate prevailing at the date of sale. They argue, however, that the 343,147 pound adjusted cost basis of the residence, consisting of the 297,500 pound purchase price and the 45,647 pounds paid for capital improvements, likewise should be expressed in U.S. dollar terms as of the date of the sale. Appellants correctly state that, viewed “in the foreign currency in which it was transacted,” the purchase generated a 110,227 pound gain as of the date of the sale, which translates to approximately $200,000 at the $1.82 per pound exchange rate. ... However fair and reasonable their argument may be, it amounts to an untenable attempt to convert their “functional currency” from the U.S. dollar to the pound sterling. ... Under I.R.C. § 985(b)(1), use of a functional currency other than the U.S. dollar is restricted to qualified business units (""QBU""s). ... appellants correctly assert that their residence was purchased “for a pound-denominated value” while they were “living and working in a pound-denominated economy,” ... And since appellants concede that the purchase and sale of their residence was not carried out by a QBU, the district court properly rejected their plea to treat the pound as their functional currency." The bad news is that foreign exchange is ultimately somewhat unpredictable, and analyzing the risk of these things is not particularly straightforward. I'm afraid I don't know what tools exist to analyze these, aside from suggesting you look at textbooks for financial analysis classes. The good news is that there are other people who deal with multiple currencies (international businesses, for instance) who worry about the same thing. As such, you can take a look at foreign exchange rate futures and related instruments to estimate what the market as a whole currently expects the values to do. The prices of these futures could be a useful starting point. A proper commercial bank will charge lower fees for currency exchange than most other banks .. and banks will charge less than places that just do currency exchange. Actually, I've usually found that the best way to get currency is to use the atm/credit-card networks and withdraw money from my own bank. "In the end, all these fees hurt the average consumer, since the merchant ultimately passes cost to consumer. Savvy consumers can stay at par or get ahead, if they put in the effort. It's a pain, but I rotate between 4 cards depending on time of year and type of purchase, to optimize cash back. My cards are:  1. 5% rewards card on certain categories, rotates each quarter 2. 2% travel/dining card (fee card, but I travel a bunch so it's worth it, no foreign transaction fees) 3. 1.5% rewards card for everything else 4. Debit card (swiped as a CC) for small purchases (i.e. lunches) at credit union for ""enhanced"" high interest checking account, requiring certain # swipes/month. This alone returns to me ~$800/yr." The Federal Reserve Bank publishes exchange rate data in their H.10 release. It is daily, not minute by minute. The Fed says this about their data: About the Release The H.10 weekly release contains daily rates of   exchange of major currencies against the U.S. dollar. The data are   noon buying rates in New York for cable transfers payable in the   listed currencies. The rates have been certified by the Federal   Reserve Bank of New York for customs purposes as required by section   522 of the amended Tariff Act of 1930. The historical EURUSD rates for the value of 1 EURO in US$ are at: http://www.federalreserve.gov/releases/h10/hist/dat00_eu.htm If you need to know USDEUR the value of 1 US$ in EUROS use division 1.0/EURUSD. My card keeps a separate 'cash advance' limit, that's lower than the regular rate. I believe balance transfers also trigger that limit and (much higher) interest rate.