Basis Planning: A Tax Result Is Only as Reliable as the Basis Behind It

Basis is the hidden variable behind many tax results. Gain, loss, depreciation, distributions, loss deductions and estate or gift outcomes can all be wrong when basis is incomplete or carried forward without verification.

Identify which basis you are measuring

Asset basis, stock basis, debt basis, partnership outside basis and inside basis are different concepts. A practitioner should name the basis question before trying to solve it.

Reconstruct before the transaction

Waiting until a sale, distribution or loss occurs can make records harder to recover. Reconstruct contributions, purchases, improvements, prior depreciation, allocations, distributions and prior adjustments while source evidence is still available.

Entity basis requires annual continuity

S corporation shareholder basis and partnership outside basis are longitudinal attributes. Preserve beginning balance, current-year increases and decreases, suspended losses and the source return or workpaper supporting each movement.

Gift and death create different basis systems

Gifted property can carry over donor basis and special loss-basis rules; inherited property may receive a §1014 adjustment depending on ownership and applicable law. Do not substitute fair market value for basis without identifying the governing rule.

Remediation may be possible

Missing basis can sometimes be reconstructed from closing statements, brokerage histories, depreciation schedules, prior returns, appraisals, entity records or third-party documents. Document both the evidence found and unresolved assumptions.