Based on all the helpful discussion here, it sounds like you should be able to claim the credit since you're living there as your primary residence and paying for the improvement. However, I'd strongly recommend getting this confirmed in writing before making such a large purchase. One thing I haven't seen mentioned is that you might want to consider having a written agreement with your in-laws about the improvements you're making. Since you're essentially investing in their property, it could be beneficial to document that you have permission to make these improvements and that you're responsible for the costs. This could help support your tax credit claim and also protect your investment in case your living situation changes. Also, since you mentioned you'll be there for 2-3 years, make sure you understand what happens if you move before the system pays for itself through energy savings. The tax credit helps upfront, but you want to make sure the overall financial arrangement makes sense for your timeline.

This thread has been incredibly helpful! As someone who's been researching this exact situation, I want to add one more consideration that might be relevant. Since you're living in your in-laws' house under an informal arrangement, you might want to check if there are any gift tax implications if the total value of your improvements (including the heat pump) exceeds certain thresholds. The IRS might view substantial property improvements as gifts to the property owners, especially if there's no formal lease agreement. That said, for the heat pump specifically, the consensus here seems solid - you should be able to claim the 30% credit since it's your residence and you're paying for it. Just make sure to document everything thoroughly: receipts, manufacturer certifications, proof of residence (utility bills in your name, voter registration, etc.), and ideally that written agreement with your in-laws that others mentioned. One last tip: if you're planning other energy-efficient improvements during your time there (like insulation, windows, or a smart thermostat), you might be able to claim credits for those too under the 25C credit program, which covers up to $1,200 annually for various efficiency improvements.

Has anyone actually claimed this credit as a non-owner and gone through an audit successfully? I'm in a similar situation with my parents' property and getting conflicting info from different tax preparers.

I went through this exact situation two years ago when I installed a heat pump at my grandmother's house where I was living. The key thing that helped me was getting everything documented upfront - I made sure all the invoices were in my name, kept utility bills showing I lived there, and got a letter from my grandmother confirming I was responsible for the improvements. One thing I'd add to the great advice already given - consider having a written agreement with your in-laws about the improvements you're making. Even something informal can help establish that you're genuinely responsible for these costs as part of your living arrangement, not just doing them a favor. This could be helpful if the IRS ever asks questions about why a non-owner is claiming the credit. The 30% credit is substantial, so it's definitely worth pursuing if you meet the requirements. Just make sure you understand which components of your HVAC system qualify - the heat pump itself definitely does, but things like ductwork modifications might not.

Anyone know if this same rule applies for the Earned Income Credit? Me and my gf had our baby girl on Nov 15th and I heard the EIC gives you a pretty decent amount back if you don't make too much $$$.

Great question! I went through this exact same situation when my son was born in December 2023. I was so confused about whether to mark "yes" or "no" on the forms, but it turns out the IRS has very clear guidance on this. As others have mentioned, your daughter is absolutely considered to have lived with you for the entire year of 2024, even though she was only born in November. The key thing to remember is that the IRS looks at what percentage of her life she lived with you during the tax year - which in your case is 100% since she's been with you from birth through December 31st. This means you can claim her as a dependent, get the full Child Tax Credit ($2,000 for 2024), and potentially qualify for other benefits like Head of Household filing status if you're single. Just make sure you have her Social Security Number before filing - that's the one thing that can't be skipped!

The Michigan Treasury is so behind rn its not even funny. Their still processing stuff from January smh

I feel your pain! Filed mine paper on Feb 5th and still waiting too. Called the Michigan Treasury helpline yesterday and they said they're running about 8-10 weeks behind on paper returns due to staffing issues. The automated system won't even show your return until they physically scan it into their system, which could be weeks from when they receive it. Hang in there - at least we'll get our refunds eventually!

You might want to consider submitting Form 911 (Taxpayer Advocate Service Application) if this is causing financial hardship or if your PCS timeline creates special circumstances. The Taxpayer Advocate can sometimes expedite processing when there are compelling reasons. The normal 20-week processing timeframe might be problematic with your military relocation timeline.

@Geoff Richards I completely understand your frustration as a military spouse! The processing times are definitely longer than they used to be. One thing that might help with your PCS timeline - if you're moving overseas or to a combat zone, you may qualify for extended filing deadlines which could give you more breathing room. Also, make sure you keep detailed records of your amended return submission since military families sometimes need to reference tax documents for security clearances or other military processes. Have you considered reaching out to the legal assistance office on base? They sometimes have contacts who can help navigate IRS issues for military families. Hang in there! 🇺🇸