Quote from @Corby Goade:
Already plenty of good advice above, but there's one piece that is missing.
Does a cost seg or bonus depreciation actually help you in any way? You need to have the income and tax liability to support the depreciation. In my experience, 75% of the time, the tax payer doesn't have a large enough liability to justify the accelerated depreciation anyhow- depending on your income and tax bill, it might not matter at all. As a matter of fact, you might be losing future depreciation by accelerating it now.
Cost segregation and advancing depreciation has its pros and cons depending on what the individual investor's goal is. It works for some and not for others. I have clients who are increasing their cash flow by between $19k and $55k and their cost basis is between $145k and $200k. It really does depend on timing of being put in service, that bonus it qualifies for (if any) and the life cycle of the elements that can be advanced.
A con would be that a cost segregation strategy was implemented, and the investor sells it within 5 years with no intention of doing a 1031. If that investor hadn't planned it carefully and re-invested that money into the property or even the purchase of another then a recapture fee would hit them hard.
On the other hand, pros include increased cash flow, engineer-based data for the clients CPA, audit protection (with the right firm) and the ability to deflect that recapture fee with a 1031 transaction. I'm with CSSI and we've completed over 45k studies, and this is what we specialize in.
Best thing on looking for info on a cost segregation study is to go directly to a firm that specializes in it. You'd be amazed at the number of CPAs that I come across who have never even heard of this strategy and are doing their clients an injustice. We run a free predictive analysis for anyone that wants one to see if it even makes sense for them and approach it in a consultative manner and we welcome our clients to have their CPA's join the conversation.
I'm not an expert in this field, yet. However, what makes sense for one might not for the other. Hope this helps.