Before you start investing an account, you must also consider the costs that you will incur from purchasing investments once the account is open. In most cases, every time you purchase an investment, it will cost you money (through commissions). With a limited amount of funds, these transaction fees can really put a dent on your $1,000.Investing in stocks can be very costly if you trade constantly, especially with a minimum amount of money available to invest. Every time that you trade stock, either through buying or selling, you will incur a trading fee. Trading fees range from the low end of $10 per trade, but can be as high as $30 for some discount brokers. Remember, a trade is an order to purchase shares in one company - if you want to purchase five different stocks at the same time, this is seen as five separate trades and you will be charged for each one.Now, imagine that you decide to buy the stocks of those five companies with your $1,000. To do this, you will incur $50 in trading costs, which is equivalent to 5% of your $1,000. If you were to fully invest the $1,000, your account would be reduced to $950 after trading costs. This represents a 5% loss before your investments even have a chance to earn a cent!