(United Kingdom) Multiple Stock ISAs?
It is a very good idea to spread your ISAs over more than one stock broker.    However now that a lot of stock brokers charge an admin fee it can get expensive if you use too many. There is no need to tell your last year’s ISA provider that you are using a different one, however you MUST ONLY pay into one ISA provider in each tax year.
Your plan will probably work. I speak from past experience approx 5-10 years ago, when Lloyds used to offer tiered interest of up to 4% on £5000 in their Vantage accounts. It was allowed for an individual person to have up to three Vantage accounts. The criteria for obtaining the headline interest rates were simply: What I, and many others, did was to set up three Vantage accounts, call them A, B, and C, and a standing order on each to transfer minimum amount + £1 on the same day each month in this manner: This satisfied the letter of conditions, though perhaps not the spirit. Most importantly it satisfied the bank, and all three accounts received that headline interest rate. These days banks have got a little wiser to this and have started including the 'set up n direct debits' condition, which makes this a more time-consuming system to arrange - you must assign your various bills across your accounts - but I believe that the overall plan still works. They don't care where the money comes from, or whether it stays - just that it comes in. Enough people get it wrong that they don't have to worry about the few who get it perfectly right (see also: how 0% balance transfer offers can be profitable...) You can open an account with HSBC and use InvestDirect - their online share trading service - to trade LSE-traded shares. https://investments.hsbc.co.uk/product/9/sharedealing The main difference is that the ISA account like a Cash ISA shelters you from TAX - you don't have to worry about Capital Gains TAX. The other account is normal taxable account. With only £500 to invest you will be paying a high % in charges so... To start out I would look at some of the Investment Trust savings schemes  where you can save  a small amount monthly very cost-effectively - save £50 a month for a year to see how you get on. Some Trusts to look at include Wittan, City Of London and Lowland I use two different brokerages, both well-known. I got a bit spooked during the financial crisis and didn't want to have all my eggs in one basket. The SIPC limits weren't so much a factor. At the time, I was more worried about the hassle of dealing with a Lehman-style meltdown. If one were to fail, the misery of waiting and filing and dealing with SIPC claims would be mitigated by having half of my money in another brokerage. In hindsight, I was perhaps a bit too paranoid. Dealing with two separate brokerages is not much of an inconvenience, though, and it's interesting to see how their web interfaces are slightly different and some things are easier to do with one vs the other. Overall, they're really similar and I can't say there's much advantage (other than my tin-foil hat tendencies) to splitting it up like that. "Unfortunately, we don't know your country, but I'd guess ""Not US"" with the hint being your use of the word bugger in a comment.  Realized profits are taxed by all tax authorities I'm aware of, i.e. the Tax Man in every country. Annually, so that you can let the profits run during the year, and offset by the losses during that year.  The exception is within a qualified retirement account. Many countries offer accounts that will let you do just what you're suggesting, start with XXX number of Quatloos in your account, trade for decades, and only take the tax hit on withdrawal. In some cases there's an opportunity to fund the account post tax, and never pay tax again. But to repeat, this is with a retirement account, not the usual trading accounts." I'll give it a shot, even though you don't seem to be responding to my comment. SIPC insures against fraud or abuse of its members. If you purchased a stock through a SIPC member broker and it was held in trust by a SIPC member, you're covered by its protection. Where you purchased the stock - doesn't matter. There are however things SIPC doesn't cover. That said, SIPC members are SEC-registred brokers, i.e.: brokers operating in the USA. If you're buying on the UK stock exchange - you need to check that you're still operating through a US SIPC member. As I mentioned in the comment - the specific company that you mentioned has different entities for the US operations and the UK operations. Buying through them on LSE is likely to bind you with their UK entity that is not SIPC member. You'll have to check that directly with them. Does this make sense? I'm concerned that by buying shares with post tax income, I'll have ended up being taxed twice or have increased my taxable income. ... The company will then re-reimburse me for the difference in stock price between the vesting and the purchase share price. Sure.  Assuming you received a 100-share RSU for shares worth $10, and your marginal tax rate is 30% (all made up numbers), either: or So you're in the same spot either way.  You paid $300 to get $1,000 worth of stock. Taxes are the same as well.  The full value of the RSU will count as income either way, and you'll either pay tax on the gains of the 100 shares in your RSU our you'll pay tax on gains on the 70 shares in your RSU and the 30 shares you bought.  Since they're reimbursing you for any difference the cost basis will be the same (although you might get taxed on the reimbursement, but that should be a relatively small amount). This first year I wanted to keep all of the shares, due to tax reasons and because believe the share price will go up. I don't see how this would make a difference from a tax standpoint. You're going to pay tax on the RSU either way - either in shares or in cash.  how does the value of the shares going up make a difference in tax? Additionally I'm concerned that by doing this I'm going to be hit by my bank for GBP->USD exchange fees, foreign money transfer charges, broker purchase fees etc.  That might be true - if that's the case then you need to decide whether to keep fighting or decide if it's worth the transaction costs. Try fool.co.uk for getting more information about ISAs:  Everything You Need To Know About ISAs "Not sure what your needs are or what NIS is:  However here in the US a good choice for a single fund are ""Life Cycle Funds"". Here is a description from MS Money: http://www.msmoney.com/mm/investing/articles/life_cyclefunds.htm" Major things to consider: If you're expecting to look at the property market: it might prove to be sensible to start doing it now, since the market is just recovering, and (IMHO warning -I'm not a professional investor, just a random guy on the internet) prices still hasn't caught up with value fundamentals.  check out cash ISA's for a 24-36 month timeframe; most do a reasonable 3-4% AER, with the current inflation rate being around 4%, this will, at the very least, make sure your money doesn't loose it's purchasing power. Finally, a word of caution: SIPPs have a rather rubbish AER rates. This, by itself, wouldn't be much of a problem on a 30-40 years timeframe, but keep the (current, and historically strictly monotonically increasing) 4% inflation rate in mind: this implies the purchasing power of any money tied in these vehicles will  loose it's purchasing power, in a compounding manner. Hope this helps, let me know if you have any questions. "First, bear in mind that you're talking about having an average of ~£2000 saved up at any given time (if you spend all your stipend every quarter at a steady rate you'll start out with all of it and have none left at the end of the quarter), along with any long-term savings you manage to build up over time. In today's low-interest rate environment of ~1% interest rates, we're talking about approximately £20/year interest. So it's not worth a huge amount of effort to optimise this. You mentioned a ""bonus"", but looking at the Charter Savings website I don't actually see one listed for either the Cash ISA or the savings accounts you mention. In general, banks in the UK actually use bonus rates as a short-term measure to suck in new customers, and the bonuses typically expire after a while leaving you with a worse rate. Also, I don't think either of the rates you mention is guaranteed - they are both listed as ""variable"". In reality, I doubt they will go down too much more, given that the likely next move in UK interest rates is upwards. The typical main advantage of an ISA is its tax free nature. But from your question I assume you don't have any other income, so you won't need to pay tax on any interest you earn outside an ISA either. Also, given that your budget is quite tight and you expect to spend most or all of your stipend, there's no advantage to using an account where you can build up long-term tax-free savings. Even if you do have a few thousand pounds left over by the end of your PhD, you'll easily be able to put those into an ISA at that point given the annual limit of £20K. You're right not to want to take any risks with the money, and there aren't really any risk-free investments other than savings accounts available, at least on the timescales you're talking about. So overall I'd just go for the 1.26% return. Edit: as @marktristan's answer points out, you will probably be able to find a ""loss leader"" current account that actually offers more interest than a savings account. You'll need to either use a single current account and manage your budgeting carefully, or use a second current account as your ""savings"" account and make sure to set things up to satisfy the requirements of the account you choose, such as incoming payments or outgoing direct debits." "I'm in the US, so there may be idiosyncrasies with UK taxes that I'm not familiar with, but here's how I've always treated stock I get as compensation.   Suppose the vested shares are worth X.  If I had X in cash, would I buy my company's stock as an investment?  Usually the answer is no, not because I think the stock will tank, but because there's better things I can do with that cash (pay off debt, unfortunately).  Therefore I sell the shares and use the cash for something else. You have stock options. So suppose the stock value is X but you can buy it for Y.  You can either: Therefore, the math is the same. If you had X in cash, would you buy your company's stock as an investment?  If so, then option 2 is best, because you can get X in stock for a lower cost. (Option 3 might be better if the gain on the stock will be taxed higher, but they're pretty much equivalent if there's no chance that the stock will drop below Y) If not, then option 4 is best since you will likely get more than X-Y from selling the options that by exercising them and selling the stock (since options have time value). If option 4 is not a possibility, then option 1 is best - you pocket X-Y as ""income"" and invest it however you see fit." No you can't, as you would have to have a different order for each security. Usually the bigger the order the more the brokerage you would also pay. I work at BATS Chi-X Europe and wanted to provide some clarity/answers to these questions. BATS Chi-X Europe is a Recognised Investment Exchange, so it is indeed a stock exchange.  Sometimes the term “equity market” could be used when explaining our business, but essentially we are a stock exchange.  As some background, BATS Chi-X Europe was formed by the acquisition of Chi-X Europe by BATS Trading in November 2011. At the time of the acquisition, each company operated as a Multilateral Trading Facility (MTF) for the trading of pan-European equities via a single trading platform. The category of MTF was introduced by MIFID (markets in Financial Instrument Directive) in 2007, which introduced competition in equities trading and allowed European stocks, to be traded on any European platform. Until 2007, many European stocks had to be traded only their local exchanges due to so-called “Concentration Rules”. Following the acquisition, BATS Chi-X Europe became the largest MTF in Europe, offering trading in more than 2,000 securities (2,700 securities by September 2013) across 15 major European markets, on a single trading platform.  In May 2013, BATS Chi-X Europe received Recognised Investment Exchange status from the UK Financial Conduct Authority, meaning that BATS Chi-X Europe has changed from an MTF status to full exchange status. In response to question 1: The equities traded on BATS Chi-X Europe are listed on stock exchanges such as the LSE but also listed on the other European Exchanges. The term “third party” equities is not particularly useful as all stock trading in Europe is generally a “second hand”  business referred to as “secondary market” trading. At the time of listing a firm issues shares; trading in these shares after the listing exercise is generally what happens in equity markets and these shares can be bought and sold on stock exchanges across Europe. Secondary market trading describes all trading on all exchanges or MTFs that takes place after the listing. In response to question 2: BATS Chi-X Europe trades over 2,700 stocks on its own trading platform. When trading on BATS Chi-X Europe, orders are executed on their own platform and will not end up of the LSE order books or platform. The fact that a stock was first listed on the LSE, does not mean that all trading in this stock happens via the LSE. However settlement process ensures that stocks end up being logged in a single depository. This means that a stock bought on BATS Chi-X Europe can be offset against the same stock sold on the LSE.  In response to question 3: As noted above, BATS Chi-X Europe received Recognised Investment Exchange (RIE) status from the UK Financial Conduct Authority in May 2013, meaning that BATS Chi-X Europe has changed from an MTF status to full stock exchange status. As an exchange / RIE, BATS Chi-X Europe is authorised to offer primary and secondary listings alongside its existing business.  According to the Federations of European Securities Exchanges (FESE), BATS Chi-X Europe has been the largest equity exchange in Europe by value traded in every month so far in 2013. In August, 24.1% of European equities trading in the 15 markets covered were traded on BATS Chi-X Europe. In July and August, the average notional value traded on BATS Chi-X Europe was around €7.2 billion per day. Hope this information is helpful. In the US, you would probably look at a certificate of deposit (CD).   I imagine there is a similar financial product in the UK, but don't know first hand.   I think it is wise to be risk averse in this situation, but be aware that your interest rate will be dismal for guaranteed returns.