Why do sole proprietors in India generally use a current account?
No. Current account is not a requirement. You can use savings account. You would need to pay taxes on interest. Savings account have limitation on number of withdrawal in a quarter, hence most sole proprietorship have current account. Current account offers a lot of benefits for sole proprietors. Think of it like bank account for a company. The bank provides a host of facilities for the company. A sole proprietor does not have enough value as that of a company for a bank but needs similar services. Thus Indian banks offer a toned down version of the account offered to a company. Current account offer very good overdraft ( withdrawing money even if balance is zero). This feature is very useful as  business cycles and payment schedules can be different for each supplier/customer the sole proprietor does business with. Imagine the sole proprietor account has balance of zero on day 0. customer X made payment by cheque on day 1. Cheques will get credited only on Day 3 (Assume Day 2 is a national holiday or weekend).  Sole proprietor gave a cheque to his supplier on day 0. The supplier deposited the cheque on Day 0 and the sole proprietor's bank will debit the the proprietor's account on day 1. As customer's cheque will get credited only day 3, the overdraft facility will let the proprietor borrow from the bank Interestingly, current accounts were offered long before Indian banks started  offering customized accounts to corporate customers. The payment schedule mentioned in my example is based on a clearing system > 10 years ago. Systems have become much simpler now but banks have always managed to offer something significantly extra on lines similar to my example above to proprietor over a savings bank account
"While this seems overall a macroeconomics question and not really personal finance, let me give it a shot: The question of why corporations form in a free or efficient market is why Ronald Coase received the 1991 Nobel Prize in Economics, for his work developing the theory of the firm Corporations organize when there are transaction costs in the free market; corporations form when it is in fact more efficient for a corporation to exist than a number of small producers contracting with one another.  To the extent that corporations add efficiency to a total market, they are not ""zero sum"" at all; the net production is increased over what would exist in a market of sole proprietors who would have costs (such as researching the trust levels in counterparts, regulatory compliance, etc) that they cannot bear to engage in the same level of transactions." It depends on the structure of your business. Are you a sole proprietor filing Schedule C on your 1040, or an S-corp, or part of a partnership? The treatment of a home office will differ depending on business entity. Yes, you should be able to deduct at least some of these expenses.  For expense incurred before you started the business: What Are Deductible Startup Costs? The IRS defines “startup costs” as deductible capital expenses that are used to pay for: 1) The cost of “investigating the creation or acquisition of an active trade or business.” This includes costs incurred for surveying markets, product analysis, labor supply, visiting potential business locations and similar expenditures. 2) The cost of getting a business ready to operate (before you open your doors or start generating income). These include employee training and wages, consultant fees, advertising, and travel costs associated with finding suppliers, distributors, and customers. These expenses can only be claimed if your research and preparation ends with the formation of a successful business. The IRS has more information on how to claim the expenses if you don’t go into business. https://www.sba.gov/blogs/startup-cost-tax-deductions-how-write-expense-starting-your-business Once your business is underway, you can deduct expenses, but the exact details depend on how you organized.  If you're a sole proprietor for tax purposes, then you'll deduct them on Schedule C of your Form 1040 on your personal tax.  If you are a partnership, C-Corp, or S-Corp, they will be accounted at the business level and either passed on to you on a Schedule K (partnership and S-Corp) or deducted directly by the company (C-Corp). In any case, you will need good records that justify your expenses as business related. It might be well worth at least an initial meeting with a CPA to make sure that you get started on the right foot. Are there any IRS regulations I should be aware of when sending money to India? None. As long as you are following the standard banking channels. You are also declaring all the accounts held outside US in your tax returns. FBAR. Is it legal to do so?  Yes it is legal. do I have to declare how much I am investing and pay extra taxes? As part of FBAR. Income earned [including interest, capital gains, etc] needs to be paid in India [there are some exemptions for example interest on NRE accounts] as well as in the US [relief can be claimed under DTAA Indian version here and US here]. So if you already have paid taxes on salary and say transfer USD 10K to India; there is no tax on this 10K. If this 10K generates an income of say 2K; this 2K is taxable as per normal classification and rules. It possibly could have made sense historically when interest rates were higher. In the UK, you used to get negligible (if any) interest on a current (checking) account, but could get modest interest from a savings account, so transferring the bulk of your salary to a savings account and paying from there (or transferring back to the current account when needed) could make some sense (but even then was probably not worth the effort). Nowadays (at least in the UK), most (easy access) savings accounts pay very little interest, but there are current accounts (example list here from comparison site) that pay more interest provided you go through several hoops. Typically you have to pay your salary (or a minimum number of £000s per month) into the account, and have a minimum number of direct debits going out. Some have fees, some only last for a year. Why do savings accounts for businesses offer less yield than bank accounts for individuals?  The money held in savings account on a collective average substantial amount stays with the Bank. The Bank is better able to predict and thus invest this money in individual savings account in market to make more money. Money held in Business accounts are unpredictable and can get withdrawn, the Bank is thus not able to predict the behaviour and hence not able to invest this better to get good returns, hence the interest offered is low. Most Banks have special products for Businesses that would give better return but come with some kind of lock-in or minimum balances. In a sole proprietorship AND an LLC, the expenses can still be deducted against the profits or losses from the operations. The IRS does not even require that a profit seeking activity be incorporated under its own entity, hence why this is also applicable in a sole proprietorship. From what you've said, there is no reason to use a more complicated and costly corporate structure at all. In comparison, a sole proprietorship and single-member LLC will be completely pass through entities to the IRS and all of their earnings go to you. With the LLC you have the option of letting the LLC's earnings remain with the entity itself, or you can just treat it as your own and pay individual income taxes on it. This has nothing to do specifically with a gambling business and is largely a red herring to your profit seeking motives. Gambling in casino games and lotteries already enjoy favorable tax treatment in some regards. Gambling in capital markets also enjoy a myriad of favorable tax laws. A business entity related to this purpose should be able to deduct costs related to this trade (and pass an audit more convincingly than not having formed an LLC and business bank account) Good day! Did a little research by using oldest public company (Dutch East India Company, VOC, traded in Amsterdam Stock Exchange) as search criteria and found this lovely graph from http://www.businessinsider.com/rise-and-fall-of-united-east-india-2013-11?IR=T :  Why it is relevant? Below the image I found the source of data - Global Financial Data. I guess the answer to your question would be to go there: https://www.globalfinancialdata.com/index.html  Hope this helps and good luck in your search!