How to safely earn interest on business profits (UK)
Deposit it in a business savings account. The following below show you some options you can choose from. Next you can invest it in the market i.e. shares, bonds etc. If you have a more risky side, can go for peer to peer lending. If you are feeling really lucky and want to invest in the long term, then buy a property as a buy-to-let landlord. There are loads of options, you only need to explore. I found some UK personal accounts offer up to 3% interest (no names here, but it is well known bank with red logo). You can take out directors loan from your company, put the cash into that personal account and earn interest. Just don't forget to return this loan before end of financial year, so this interest does not become your dividends.
The company will have to pay 20% tax on its profits. Doesn't matter how these profits are earned. Profits = Income minus all money you spend to get the income.  However, you can't just take the profits out of the company. The company can pay you a salary, on which income tax, national insurance, and employer's national insurance have to be paid at the usual rate. The company can pay you a dividend, on which tax has to be paid. And the company can pay money into the director's pension fund, which is tax free.  Since the amount of company revenue can be of interest, I'd be curious myself what the revenue of such a company would be. And if the company makes losses, I'm sure HMRC won't allow you to get any tax advantages from such losses. It sounds like you're putting all your extra money into insurances because you feel that one can never have too much insurance. That's a very bad idea, financially. Basically it means you'll end up giving your money away to insurance companies in order to satisfy that feeling. Do realize that the expected value of every instuance is negative: on average, you'll pay more money than you'll receive. Otherwise, insurance companies would go bankrupt, so they are very good at ensuring that they get more in premiums than they pay out. Insurance should only be bought to cover essential risks, things that would ruin you: major health problems, death (to cover dependants), disability, liability. For everything else, you should self-insure by saving up money (up to a few months' wages) and putting it into safe and liquid investment vehicles as an emergency fund. That way, you are much more flexible, don't pay for the insurance company's employees, fancy offices and profits, and may even earn some interest. "To summarize your starting situation: You want to: Possible paths: No small business Get a job. Invest the 300K in safe liquid investments then move the maximum amount each year into your retirement accounts. Depending on which company you work for that could include 401K (Regular or Roth), deductible IRA, Roth IRA. The amount of money you can transfer is a function of the options they give you, how much they match, and the amount of income you earn. For the 401K you will invest from your paycheck, but pull an equal amount from the remainder of the 300K. If you are married you can use the same procedure for your spouse's account. You current income funds any vacations or splurges, because you will not need to put additional funds into your retirement plan. By your late 30's the 300K will now be fully invested in retirement account. Unfortunately you can't touch much of it without paying penalties until you are closer to age 60. Each year before semi-retirement, you will have to invest some of your salary into non-retirement accounts to cushion you between age 40 and age 60. Invest/start a business: Take a chunk of the  300K, and decide that in X years you will use it to start a small business. This chunk of money must be liquid and invested safely so that you can use it when you want to. You also don't want to invest it in investments that have a risk of loss. Take the remaining funds and invest it as described in the no small business section. You will completely convert funds to retirement funds earlier because of a smaller starting amount. Hopefully the small business creates enough income to allow you to continue to fund retirement or semi-retirement. But it might not. Comment regarding 5 year ""rules"": Roth IRA: you have to remain invested in the Roth IRA for 5 years otherwise your withdrawal is penalized. Investing in stocks: If your time horizon is short, then stocks are too volatile. If it drops just before you need the money, it might not recover in time. Final Advice: Get a financial adviser that will lay out a complete plan for a fixed fee. They will discuss investment options, types not particular funds. They will also explain the tax implications of investing in various retirement accounts, and how that will impact your semi-retirement plans. Review the plan every few years as tax laws change." In Australia, any income you earn is taxable despite where it came from. Using your example your taxable income is $70,000. Keep in mind that with a business even as a sole trader any business expenses that contribute to the earning of your business income is deductible, reducing the final amount of tax you'll have to pay.  The ATO website has lots of good information and examples to look at including tax rates.  If your total income is pushing  into a higher tax bracket over 30c tax per $1 earned, it may be worth looking at shifting your business to operate under a company structure that just has a fixed tax rate around 30c per $1.  That said, for me, I don't want the paperwork overhead of a company yet so I'm running my side business as a sole trader too. I'd rather do that and keep it easy for now while my business gets profitable that waste time on admin structures for tax reasons even if in the shortterm it may mean slightly higher tax. In the end, you only pay tax on profit (income minus expenses) as opposed to raw/gross income.  For more info there are good books in the bookshops or local library (to read free) on starting a business on the side while still working. They discuss these issues too. Is it safe to invest in a portfolio of dividend stocks yielding 7-9% with the money borrowed at 3-4% from one of these brokerages? Yes and no. It depends on your risk profile! Any investment has its risks of losing your capital, but not investing is a guaranteed risk, as you will be guaranteed to fall behind the rate of inflation. Regarding investing on margin, this can increase your gains but can also increase your loses. Regarding the stock market - when investing in stocks you should not only look at the dividend rate but also the capital gain or loss potential. Remember in regards to investing on margin, if the share price drop too much you can get a margin call no matter how much dividend you are getting. It is no use gaining 9% in dividend yield per year if you are losing 15% or more in capital each year. Also, what is the risk of the dividend rate being cut back or dividends not being paid at all in the future? These are some of the risks you should consider before investing and derive a risk management plan as part of your investment plan before you invest. No investment is totally safe or risk free, but it is less risky than not investing at all, as long as you understand the risks involved and have a risk management plan in place as part of your overall investment plan. "I've done exactly what you say at one of my brokers.  With the restriction that I have to deposit the money in the ""right"" way, and I don't do it too often.  The broker is meant to be a trading firm and not a currency exchange house after all.  I usually do the exchange the opposite of you, so I do USD -> GBP, but that shouldn't make any difference. I put ""right"" in quotes not to indicate there is anything illegal going on, but to indicate the broker does put restrictions on transferring out for some forms of deposits.    So the key is to not ACH the money in, nor send a check, nor bill pay it, but rather to wire it in.  A wire deposit with them has no holds and no time limits on withdrawal locations.  My US bank originates a wire, I trade at spot in the opposite direction of you (USD -> GBP), wait 2 days for the trade to settle, then wire the money out to my UK bank.  Commissions and fees for this process are low.  All told, I pay about $20 USD per xfer and get spot rates, though it does take approx 3 trading days for the whole process (assuming you don't try to wait for a target rate but rather take market rate.)" I can't comment about your tax liability in Greece. You will have to pay tax on interest in the UK. If you are earning massive amounts of interest, unlikely with the current interest policies from Merv, then you might be bumped up a tier. The receiving bank may ask for proof of the source of the funds, particularly if it is a fair chunk of change. In a simple case as the sole UK resident director/shareholder of a company, with that company as your only income, you are usually best paying yourself a salary of the maximum tax free amount allowed under your tax code (~£11k for most people at present).  On this you will have to pay some employer and employee National Insurance (NI) contributions (totalling around £1000). Your salary/employer NI counts as an expense, so that is taken off the company profits.  You then pay corporation tax on the remainder (20%).  The first £5k you take as dividends is tax free, the remainder at a lower tax rate than the equivalent combined income tax/NI (starting at 7.5% instead of 20% tax plus employee plus employer NI), giving a significant saving compared to salaried income even after corporation tax. To declare and pay the tax, you would need to complete a self-assessment tax return.  Your company will also need to file a return. The Contractor UK website, although aimed at IT contractors, has some very useful information on operating Ltd companies. That said, finances are rarely that simple so I would concur with the recommendation you engage an accountant, which is a tax-deductible expense.