How much is a fiance visa in the US?

As of early 2017 the total filing fees for the K-1 process were $535. for Form I-129F (filed with USCIS), $265. to apply for the K1 visa (paid to the consulate), and $1,225. for Form I-485 and the adjustment of status packet (filed with USCIS), including the biometrics fee.