Top Cost Segregation Firms In South Carolina For 2027

David Roberts Founder & CEO - ReVerb

11.12.2026

Last updated: November 12, 2026

The best cost segregation firms in South Carolina for 2027 are Elliott Davis, Cherry Bekaert and Engineered Tax Services, followed by Source Advisors, Cost Seg Smart and R.E. Cost Seg. Elliott Davis leads for a Greenville firm with deep South Carolina roots, Cherry Bekaert for licensed engineers paired with tax staff, and Engineered Tax Services for South Carolina studies including Piedmont and Hilton Head.

South Carolina investors own Charleston and Myrtle Beach vacation rentals, Greenville and Spartanburg industrial buildings, and fast-growing multifamily across the state. The One Big Beautiful Bill Act made 100% bonus depreciation permanent for qualifying property acquired after January 19, 2025, so reclassified components can often be deducted in the first year on the federal return.

South Carolina’s treatment of federal bonus depreciation has differed from the federal rules in past years. Because conformity can change, ask your CPA how a study will affect your South Carolina return.

South Carolina Cost Segregation Firms At A Glance

Firm	Location	Founded	Specialty	Best For
1. Elliott Davis	Greenville, SC	1920	Southeast accounting firm	South Carolina owners
2. Cherry Bekaert	Raleigh, NC	1947	CPA firm pairing licensed engineers with tax staff	Southeast owners
3. Engineered Tax Services	West Palm Beach, FL	2001	Licensed engineering firm for specialty tax	South Carolina owners of all types
4. Source Advisors	Arlington, TX	Not published	Cost segregation and fixed asset studies	Owners who want a site visit
5. Cost Seg Smart	Los Angeles, CA	2024	Residential and commercial studies with audit support	Coastal rental investors
6. R.E. Cost Seg	Houston, TX	2022	Investor-focused studies at two depths	Rental investors
7. O’Connor	Houston, TX	Not published	Property tax and cost segregation services	Owners who also appeal taxes
8. Duffy+Duffy	Westlake, OH (Novi, MI office)	2002	Cost segregation only	Owners whose CPA wants training
9. KBKG	Pasadena, CA (seven US offices)	1999	Tax credits and incentives with engineered studies	Larger owners
10. Forvis Mazars	Springfield, MO	Not published	National accounting firm	Larger operators

How We Evaluated These Firms

We looked for firms with South Carolina offices or studies, experience with coastal vacation rentals and Upstate industrial, and clear audit support.

Rankings are editorial. No firm paid for its position. State tax notes are general information; confirm your situation with a CPA.

Best Cost Segregation Firms In South Carolina For 2027

1. Elliott Davis — A Greenville Firm With Deep State Roots

Elliott Davis is headquartered in Greenville and offers cost segregation as part of its tax services.

It suits owners who want a South Carolina firm to handle the study and the return.

Best for: South Carolina owners who want a local accounting firm.

2. Cherry Bekaert — Licensed Engineers Paired With Tax Staff

Cherry Bekaert pairs licensed engineers with tax professionals and offers a complimentary feasibility analysis.

Its Southeast footprint suits South Carolina owners.

Best for: Southeast owners who want a feasibility check first.

3. Engineered Tax Services — South Carolina Studies From Piedmont To Hilton Head

Engineered Tax Services publishes South Carolina studies, including a Piedmont gas station and Hilton Head residential rentals.

As a licensed engineering firm, it suits complex properties.

Best for: South Carolina owners who want comparable studies.

4. Source Advisors — South Carolina Coverage With Site Visits

Source Advisors publishes South Carolina cost segregation pages and conducts a site visit on nearly every study.

It brings more than 40 years of specialty tax experience.

Best for: Owners who want an inspection.

5. Cost Seg Smart — Charleston And Myrtle Beach Rental Coverage

Cost Seg Smart publishes pages for Charleston and Myrtle Beach and offers low-cost studies with written IRS responses included.

It suits coastal short-term rental investors.

Best for: Coastal vacation rental investors.

6. R.E. Cost Seg — Two Study Depths With Audit Defense

R.E. Cost Seg offers a Rapid Report and a Fully Engineered Study with audit defense included.

It suits South Carolina multifamily and rental investors.

Best for: South Carolina rental investors.

7. O’Connor — Carolinas Coverage Plus Property Tax Help

O’Connor publishes Carolinas cost segregation pages and handles property tax appeals.

It suits owners who want both reviewed.

Best for: Owners who want a tax appeal review.

8. Duffy+Duffy — Free CPE For South Carolina Accountants

Duffy+Duffy runs free CPE seminars in South Carolina and focuses only on cost segregation.

It gives a flat-fee quote before work begins.

Best for: Owners whose CPA values a dedicated partner.

9. KBKG — National Depth And A Strong Audit Record

KBKG has offered cost segregation since 1999 and reports a 99% IRS audit success rate.

It suits larger South Carolina commercial owners.

Best for: Larger owners.

10. Forvis Mazars — A National Firm With Southeast Offices

Forvis Mazars offers cost segregation and fixed asset services with offices across the Southeast.

It suits larger operators with complex reporting.

Best for: Larger operators.

How To Choose A Cost Segregation Firm In South Carolina

Does The Firm Know South Carolina Property?

Ask for studies on properties like yours in South Carolina, and whether an engineer will visit.

How Will South Carolina Treat The Deduction?

State rules can differ from federal rules. Ask your CPA how the study affects your South Carolina return.

Is It A Vacation Rental?

Coastal homes may qualify for short-term rental treatment. See our list of cost segregation firms for luxury vacation homes.

Is Audit Support Included?

Confirm audit support. See our list of cost segregation firms with audit defense guarantees.

Frequently Asked Questions

Does South Carolina follow federal bonus depreciation?

Not always. Conformity has differed in past years. Ask your CPA.

Is cost segregation worth it in South Carolina?

Usually yes, because the federal benefit is the main driver.

Do I need a local cost segregation firm?

Not necessarily. National firms work everywhere, but a local engineer can make site visits easier.

Can I do a study on a South Carolina property I bought years ago?

Yes. A lookback study lets your CPA catch up missed depreciation with Form 3115. See our list of cost segregation firms for lookback studies.

Conclusion

Elliott Davis, Cherry Bekaert and Engineered Tax Services are the strongest picks for South Carolina investors, with Source Advisors, Cost Seg Smart and R.E. Cost Seg close behind.