Yes, you can use Help to Buy whilst on a tier 2 or tier 4 visa. Nothing states that you are prohibited from using Help to Buy while on Tier 2 or Tier 4 visa. However, according to immigration lawyers, it might be difficult to secure the funding you need. This is because there are very few lenders who offer the Help to Buy scheme to those who have Tier 2 or Tier 4 visas. Many people had problems to access funding for the Help to Buy scheme. Another option, you may be able to fund it by searching for a lender who is willing to help you. You may think about going to a specialist mortgage lender for Tier 2 or Tier 4 visa holders. Unfortunately, there is a short list of banks and lenders offering this scheme. This results in you individually checking each bank or lender.