Can I deduct the mortgage interest for my home office if I'm on the title but not the mortgage loan?

[Salam1Haloum1]

For my self-employed business, I wasn't sure if I could claim the mortgage interest, property tax, and homeowner's insurance as home office deductions if only my spouse's name is on the mortgage loan and the 1098 form. We just bought the house last tax year and are both on the title and deed. Also, if I can claim, can I claim the whole amounts, or only half?

For various reasons, we are Married Filing Separate and using the standard deduction, so neither of us are going to be able to claim the main mortgage interest, etc deductions anyway. So ideally, I would at least like to be able to deduct the proportion of expenses applicable to my home office, which does pass the exclusive use test.

[JulieS]

Yes, you can claim half of these expenses as long as this is your main home and you actually did pay at least half of the expenses.