It would be a 30 percent sales tax on retail purchases. Since 30 cents is 23 percent of $1.30 (the amount you would pay on a $1 item), a 30 percent FairTax would cost you about 23 percent of your consumption.This is the main problem with the Fair Tax--the ability to explain it and sell it to the Average Joe. The Fair Tax "user interface" is a debacle.
Under FT, they pay nothing. Hence all those who live at home in the basement are strongly attracted to the FT (along with drug dealers and others who don't want to report their income).
But keep in mind under the FairTax (unlike with the income tax) that not everything is taxed so that the effective tax rate is much lower than even the 23%.