Thanks for answering, but unfortunately I'm still confused. How can my average balance be dependent on the day I get my loan? For simplicity, say my loan is one million. If I get my loan on December 21, using that method, my average loan balance would be around $333,333. But if I got my loan December 1st, it would be one million. How can it be so different in those two cases? And since one of those average balance numbers is above the 2018 max of $750k and one is under, it makes a material difference in the amount of mortgage interest I can deduct.
