Speed, security, and convenience. The IRS expects to issue 9 out of 10 refunds within 21 days when you e-file and choose direct deposit. A check, however, takes 4–6 weeks to arrive in the mail.
With a direct-deposited refund, you don't need to worry about your check getting lost, nor do you have to go to the bank to deposit or cash it.
You can even split a direct-deposited refund into 2 or 3 different accounts, unless you're using the Pay With My Refund option to pay your TurboTax fees.
To help combat fraud, IRS regulations prohibit direct-deposits into foreign accounts—only domestic accounts located in the United States.
Also, the IRS won't deposit more than 3 refunds into the same bank account during the same year. Additional direct deposit requests will instead be mailed out as refund checks to the taxpayer's address on file.