I thought it was an actual loss.

But is that a $100 "loss"?

If one spouse qualifies for reps and materially participates in the rental activity, then all the rental activity should be eligible to write off any losses against active income to better help, can you describe how your mom is a real estate professional?

Quote from @Santos Lopez: I heard that there's a way to deduct short term rental losses against earned income (e.g.

Even without that, it’s best to structure things so you avoid the vacation-home rules altogether.If you minimize or eliminate personal use of the property, you can deduct all operating expenses and depreciation.

I have never sold at a loss.

But I’m cautious as I read about recent post on biggerpockets about sponsors underperforming, asking for capital calls and losing investor capital.What I want to learn is how to minimize my risk and avoid placing my money with sponsors who are more likely to lose my money. 

I live Brooklyn where I own my primary residence (2024), and 4 long term rental units in California I purchased between 2017 - 2021.I’ve been asked to move abroad to London, and I’m wondering if there is any strategies to minimize tax on my US properties. 

To address the 1 month loss - unfortunately, from my experience, vacancy is just something that needs to be factored in.

Keep that money liquid until your CPA confirms the final amount due next April.However, it’s worth considering a few strategies that could help reduce your tax bill now, like spreading out the gain over two tax years if the timing of your sale allows, or offsetting some of it through tax-loss harvesting from other investments.