Don't you need to be sure to factor in your personal exemptions and your standard deductions before thinking your entire mortgage interest amount can be written off?
For example, say I had a mortgage in 2015 and paid $15,000 in interest and gave $5000 to chairty. My personal exemptions and standard deduction for being married and filling jointly would be $20,600. I still wouldn't be able to itemize on my taxes and get any tax benefit from paying the mortgage interest, right?
(Disclaimer: I haven't done my own taxes in years and years, so please tell me if I'm off my rocker.)
Just throwing out some data here (thinking out loud).
The mortgage interest on the rental can be used as a rental expense.
The rental yields about $20k revenue a year. The expenses and the depreciation and the repairs negate that $20k if I have that interest write off.
So depending on where my AGI ends up, that will affect me 25% federally and 7% on state income. (Combined that's 32%)
Scenario A
Our combined income is $140k.
If the rental breaks even on paper we're still at $140k. (Don't pay off mortgage and have $8,000 interest write off).
Then say we have 30k in other deductions, our AGI would be $110k.
Scenario B
Combined income is $140k
Rental yields an increase income of $8,000.
Other 30k of deductions. Adjusted Gross Icnome would be $118k.
Both would put me in 25% bracket federal. Plus 7% state. 32% total.
$2560 difference for having the mortgage yet of that $8,000 interest.
As the mortgage gets paid down more, these benefits get watered away of course.