
Martinsburg, West Virginia accounting firm providing tax, back office, CFO and valuation services to small businesses

Delaware CPA firm offering tax planning, tax preparation and QuickBooks services to individuals and small businesses

Cornerstone, CPA, trading as The Cornerstone Group, LLC, is a certified public accounting firm with offices in Bear and Newark, Delaware, and in Gap, Pennsylvania. It treats tax planning and tax preparation as one job, so that a client's tax bill is anticipated rather than a surprise.
The firm works with individuals, couples and small businesses, and gives clients a secure portal for uploading documents. It does not specialise in taxation for foreign-owned companies.
Profile written by TrustList from the business's own published information, Sep 2026.
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As of 2026-10-06. Organic ranks only; sponsored placements are never ranks.
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