Cost Basis: The Tax Number Business Owners Cannot Afford to Ignore

A South Florida business owner buys a warehouse, acquires a competitor, transfers property to an employee, or sells part of an investment portfolio. Years later, the tax bill may depend on a number that received little attention when the transaction closed: tax basis.

Basis is more than an accounting entry. It determines taxable gain or loss, affects depreciation and amortization deductions, and supports the position reported on a future tax return. An incorrect calculation can lead to lost deductions, overstated taxable gain, inconsistent financial records, and difficult questions during an audit, financing, due-diligence review, or sale.

What Cost Basis Means

Internal Revenue Code Section 1012 generally starts basis with the property's cost. Section 1016 then requires adjustments for items such as capital improvements, depreciation, amortization, and certain distributions. The calculation becomes more complex when several assets are purchased together, shares were acquired at different prices, property is transferred below market value, or a business acquisition includes goodwill.

Real Estate: Separate Land From the Building

When land and a building are purchased for one price, the cost should generally be allocated according to relative fair market value. For example, if an $800,000 property is appraised at $600,000 for the building and $400,000 for the land, 60%—or $480,000—is allocated to the building and 40%—or $320,000—to the land. The distinction matters because land is not depreciable, while the building may generate deductions.

Business Acquisitions: Allocate the Purchase Price

A business purchase may include inventory, equipment, vehicles, customer relationships, trade names, real estate, and goodwill. Section 1060 generally requires applicable asset acquisitions to use the residual method. Identifiable assets receive value first, and the remaining amount is generally assigned to goodwill or going-concern value. The purchase agreement, valuation, accounting records, and tax filings should tell the same story.

Stock Sales: The Tax Lot Matters

Suppose an investor buys 100 shares at $50 and another 100 shares at $60. If 50 shares are sold without adequate identification, first-in, first-out generally treats the earlier $50 shares as sold, producing a $2,500 basis. Timely identification of shares from the later lot could produce a $3,000 basis, subject to holding-period and documentation rules. Review tax lots before settlement and retain the broker confirmation.

Below-Market Transfers and Stock Dividends

A discounted transfer from an employer to an employee may create compensation under Section 83, while a corporation-to-shareholder transfer may be treated as a distribution or dividend. Separately, Section 307 generally spreads existing basis across additional shares received in a nontaxable stock dividend. These transactions should be reviewed before execution because the correct basis often depends on how the transaction itself is characterized.

Before Your Next Transaction

Preserve purchase agreements, closing statements, appraisals, invoices, broker confirmations, and improvement records. Separate land, buildings, equipment, vehicles, inventory, identifiable intangible assets, and goodwill. Confirm stock-lot instructions before settlement. Reconcile basis to the accounting records and tax returns. Review owner, employee, and related-party transfers before documents are signed.

Planning Before Closing Is More Valuable

BizCPAs helps business owners, investors, and internationally connected companies evaluate the tax and accounting effects of real estate purchases, business acquisitions, securities transactions, ownership changes, and asset sales. Early review can support available deductions, create cleaner records, and reduce surprises when an asset or business is eventually sold.

Planning to purchase property, acquire a business, transfer ownership, or sell an investment? Contact BizCPAs before the transaction is finalized so the basis, allocation, accounting treatment, and supporting documentation can be evaluated from the beginning.

This article provides general educational information and does not constitute individualized tax, legal, valuation, or investment advice. The proper treatment depends on the transaction documents, ownership structure, facts, and applicable law.