Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Proper etiquette for loans from friends 
The standard approach is to reach an agreement and put it in writing. What you agree upon is up to you, but in the US if you want to avoid gift taxes larger loans need to be properly documented and must charge at least a certain minimal interest rate. (Or at least you must declare and be taxed upon that minimal income even if you don't actually charge it. Last I looked, the federal requirement was somewhere under 0.3%, so this isn't usually an issue. There may also be state rules.) When doing business with friends, treat it as business first, friendship second. Otherwise you risk losing both money and friendship. Regarding what rate to charge: That is something you two have to negotiate, based on how much the borrower needs the money, how much lending the money puts the lender at risk, how generous each is feeling, etc. Sorry, but there is no one-size-fits-all answer here. What I charge (or insist on paying to) my brother might be different from what I charge my cousin, or a co-worker, or best friend, or... If both parties think it's fair, it's fair. If you can't reach an agreement, of course, the loan doesn't happen.