An amended Form I-129 with the base L fee and any applicable asylum program fee on the USCIS schedule, plus optional premium processing. The alternative, leaving at five years and returning after a year abroad, costs a new initial petition with the fraud-prevention fee and a year of lost management.
One amended petition against a year away
The change of classification is an amended petition on Form I-129, which carries the base fee for L petitions on the USCIS fee schedule, Form G-1055, and the asylum program fee where the affiliate’s employee count requires it; the fraud prevention and detection fee is charged on initial L petitions and changes of employer, and the petition should state its position on that fee accurately. Premium processing is an additional published fee and is usually worth paying because the six-month policy makes the approval date matter. The comparison is with the alternative: allowing L-1B to run out at five years, sending her home to La Pêche for the required year abroad, and then filing a new initial L-1A petition with the fraud-prevention fee and starting the seven-year clock from a new admission.
That path costs a second full petition and a year without her in the creamery, which for a production role is the larger cost. Fee amounts change; confirm the schedule before filing.