<prompt> Human: Hi Reddit! I am preparing to gift my sister 27k dollars at closing to help her buy a house. I live in California her in Florida. No one can tell me who and what tax liabilities will arise from me signing a gift letter at closing.  <response>: You will have to tell the IRS about it because its above 15K and they will deduct it from your lifetime exemption and thats it. Theres no liability. 