The fee and dollar amount you'll pay should be indicated in your account documentation. However, many of today's banks, brokerage firms, investment firms and even mutual funds no longer charge fees. Roth IRAs are a popular retirement account option for a reason. This is because they are easy to open with an online broker and, historically, offer an average annual return of 7 to 10%.
Roth IRAs take advantage of capitalization, meaning that even small contributions can grow significantly over time. That's why it's important to open a Roth IRA sooner rather than later. That means you'll be more prepared for retirement the longer your money has to grow. However, if your tax rate is the same when you contribute to the account as when you withdraw the money, then a Roth IRA and a traditional IRA offer basically the same benefit.
If, despite the much lower rate of return, you decide to choose a bank for your Roth IRA account, be sure to choose between the accounts with the best IRA CD interest rates to know that you are getting the best possible rate of return for that type of account. In this way, Roth IRAs are the opposite of traditional tax-deferred or 401 (k) IRAs; with those accounts, you'll have to pay taxes when you withdraw the funds.