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# How to calculate mortgage interest deduction for 2 non-overlapping primary homes?

Hi experts,

I have special situation that need your help on calculating mortgage interest deductions.

• I have primary home 1 lived between 1/1/2023-7/31/2023, rented out on 8/1/2023-12/31/2023 (153 days). 1098 shows interest \$26,641, loan balance \$1,077,471. (This home is bought after 2018, so qualify for \$750K mortgage)
• I rented a home to live during 8/1/2023 - 10/19/2023
• I bought another primary home 2 on 10/20/2023, and live there since 10/20/2023 as my primary home. 1098 shows interest \$11,826, loan balance \$1,661,471.

My understanding is that:

• In rental part of TT, I should type interest from home 1: 153 / 365 * \$26,641 = \$11,167
• In primary home part, I should type 2 interests, one is \$26,641 - \$11,167 = \$15,474 from home 1, and another one is \$11,826 from home 2
• For home 1 during 1/1-7/31, I should deduct \$15,474 * 750,000/1,077,471 = \$10,771 interest, and for home 2 during 10/20-12/31, I should deduct \$11,826 * 750,000 / 1,661,471 = \$5,338 interest. Combined it's \$16,109 interest to deduct.

But Turbotax tells me to only deduct \$7,476 interest, which calculates as: (\$15,474 +\$11,826) * 750,000 / (1,077,471 +1,661,471).

I think Turbotax assumes both of my primary home interest are for whole year, but it's not, home 1 is for 1/1-7/31, and home 2 is for 10/20-12/31, they are not over-lapping, so I think Turbotax's calculation is incorrect.

Is my understanding correct? If so, how should I fix it?

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## How to calculate mortgage interest deduction for 2 non-overlapping primary homes?

Please clarify which version of TurboTax you are using - Online or Desktop - Premier, Premium, Home and Business?

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