When sending money with a credit card or a debit card, you can choose to use the card issuer's exchange rate. However, it is impossible to know the exchange rate used at the time of remittance immediately, and the exchange rate used at that time cannot be checked until the bank issues the monthly statement.

for future returns.
^{For sending remittance from UAE self bank account to India self bank account for investment purpose ( say FD or mutual funds etc.) is there any limit of amount per remittance or per year which can be sent . Remittances are sent through bank channels only.}

It's also important to note that if the money is being sent for a specific purpose such as a business venture or for buying property and the money is being sent regularly, the regularity of such transactions could be seen as a business income and might be taxable.

looking forward for your kind guidence..
Today's cheapest money transfer service might not be the cheapest tomorrow. Find the one that's best-suited to your needs and preference by comparing the best performers on Monito's comparison engine over the past 30 days for transfers from the USA to India:
First we should check whether NRI is relative or not, If he/she is relative then both receiver and giver are exempt from tax in india.
You'll need a US driver's license, passport or government-issued ID to register online with Western Union®️. When sending money to India, your receiver's account number, IFSC code and the purpose of the transfer are required. We might also ask for additional information about your source of funds and occupation, depending on the amount of money you would like to send, when making a 'large amount' money transfer.
Western Union has different fees for nearly every country it sends to, and we've seen fees range from as low as $3.50 up to $100 or more. These fees depend on how you are paying for the transfer and how the transfer will be collected. Agent location fees aren't typically posted online, but Western Union's online fees are based on: