Grant McCarthy Group
GMG focuses on helping clients with all business tax practices procedures, compliance, and multi-jurisdictional tax complexities. We assess situations to help our clients reduce their tax burdens and maximize their cash flow.

Providing technology enabled services to simplify tax complications and provide financial benefits.
GMG is committed to ensuring our clients only pay their fair share of tax. We leverage Vertex to deliver real time savings to clients and reduce the need for audits to determine areas of exposure or overpayment. Our services deliver quantifiable financial value.
Benefits of Our Partnership
Machine learning under the direction of experienced tax professionals.
Correction of ERP and tax determination engine rules reduces overpayments and underpayments.
Maintained by tax professionals utilizing technology to deliver streamlined results.
Resources for You
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eBookDiscover how Vertex O Series simplifies tax across systems—saving IT time, money & boosting business value.
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eBook
Bridging the Gaps: How Tax Teams Can Gain Control by Consolidating Processes Across Source Systems
Discover how Vertex O Series simplifies tax across systems—saving IT time, money & boosting business value. -
Blog Post
Romania’s VAT Rate Increase
Chris Hall on Romania’s decision to increase its standard VAT to 21% to comply with EU fiscal rules.