<prompt> Human: I have my Roth IRA set up to deposit about 65 every month from my savings to my IRA account. However, once the money is in there I want to invest it in an index fund. Do I have to pay commission every month to invest that 65? Or should I just do it once a year and hold the most recent additions in cash until then?  <response>: That depends on who your IRA provider is and what investment youre buying.The subs usual party line is you probably shouldnt be investing in something that charges commission. 