Seggy vs KBKG vs R.E. Cost Seg

Written by Landon RoseLast updated 2026-10-07Pending review by a Certified Cost Segregation Professional

For a single short-term rental: KBKG's software ($495) is the cheapest if you're comfortable entering the details yourself. R.E. Cost Seg is a good fit if you want an established engineering firm and a fully engineered study is worth $2,320 or more to you. Seggy ($1,495) is in between: an item-by-item study built from your photos and reviewed and signed by a certified professional, targeting 10 business days after intake.

We sell cost segregation studies, so read this knowing we're biased. We've tried to be fair: competitor details come from their own public pages, and we link to them so you can check. Prices change, so confirm before you buy.

	Seggy	KBKG	R.E. Cost Seg
Price (single STR)	$1,495 flat	Cost Seg Pro software: $495 per report	Rapid Report from $950; Fully Engineered from $2,320
Turnaround	Target 10 business days after intake	Minutes (software)	About 5 business days (Rapid); 15–20 business days (Engineered)
How it's built	Your photos plus a short phone walkthrough, item by item	Self-guided software inputs	Modeling backed by engineering review (Rapid); full engineering study
Who signs	Certified Cost Segregation Professional	Software report	Engineering review
Size limits	Up to 4 units / $2M (more on request)	Under $1.5M depreciable basis	Rapid: up to 4 units, $1.2M basis
Audit support	Questions about your study answered; formal audit defense not offered yet	Included with software	Included (written responses)

When to pick KBKG

You or your CPA are comfortable entering property details, the basis is under $1.5M, and you want the lowest price from a long-established firm (founded 1999).

When to pick R.E. Cost Seg

You want an STR-focused firm with a large track record, or you want a fully engineered study and don't mind paying more and waiting longer.

When to pick Seggy

You want every item documented with photo evidence, a certified signer, and a fixed price, without doing the data entry yourself.

Whatever you choose, ask

Who signs the study, and what are their credentials?
Does it reconcile to your purchase price, with land separated?
Is audit support included, and what exactly does it cover?

Sources

This article is general information, not tax advice. Confirm how it applies to you with your tax professional.

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