US President Donald Trump plans to sign an executive order that will add a $100,000 (£74,000) fee for applicants to the H-1B visa programme aimed at bringing in skilled workers from abroad into certain industries.
The proclamation will reportedly mention "abuse" of the programme and will restrict entry unless payment is made.
Critics of the programme have long argued that H-1Bs undercut the American workforce, while proponents - including billionaire Elon Musk - argue it allows the US to attract top talent from around the world.
A separate order is expected to order a review of minimum wage requirements for those under the scheme.
Since 2004, the number of H-1B applications has been capped at 85,000 per year.
