Lending private money to friend for property investment purposes

[Roberto Fernandez Andersson]

I want to lend my friend >$50k so he can buy a property and flip it. All risks aside, what are the tax implications to consider? Interest income will be taxed but how about the initial tansfer of money or when my friend pays be back within a year? First time I am considering this. Thank you in advance!

[Anne Jenkins]

please do not skip the above advice, just because this is A FRIEND.  Many an investor will tell you that their worst nightmare was doing business either with a friend or family.  
This is BUSINESS.  Don't get sloppy because this is a friend, be sure to have all the paperwork in place that protects you from the deal going south.   Do your due diligence.  Make sure the deal is worthy of the loan.  That is,  what is the property worth now, once fixed up, and take into consideration the market and factor in the possibilities.   How much experience does your friend have flipping?  There is a load to know  about that kind of investing and the pitfalls of surprises that fixer uppers don't reveal until you tear out a wall or start remodeling.    

I know too many investors who lost money because they felt they shouldn't make friends sign legal agreements.   Legal agreements are a good way to keep friends and make sure you get your money back.