Until it was listed for rent it would be considered a second home.
For tax years prior to 2018, you can write off 100 percent of the interest you pay on up to $1.1 million of debt secured by your first and second homes and used to acquire or improve the properties. (That's a total of $1.1 million of debt, not $1.1 million on each home.) Beginning in 2018, the limit is reduced to $750,000 of debt secured by your first and second home for binding contracts or loans originated after December 16, 2017. For loans prior to this date, the limit is $1 million ($1.1 million without the $100,000 home equity portion). You can also deduct property taxes on your second home and, unlike the mortgage interest rule, you can deduct property taxes paid on any number of homes you own. however, beginning in 2018, the total of all state and local taxes deducted, including property taxes, is limited to $10,000 per tax return.
Answers are correct to the best of my ability but do not constitute legal or tax advice.
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