Loss duplication has its own incorporation rule
When property transferred to a corporation in a qualifying transaction has aggregate adjusted basis exceeding aggregate fair market value under section 362(e)(2), the corporation generally must reduce the relevant transferred property basis to prevent duplication of that net built-in loss. The transferor and corporation may instead elect to reduce the transferor's stock basis under the applicable rules. An owner should therefore compare where the loss potential will reside before assuming incorporation preserves full historic basis in both places. This is different from gain recognition when liabilities exceed basis. A contribution can meet section 351's nonrecognition requirements and still require a built-in-loss basis adjustment. The election is irrevocable and requires a proper statement. An informal agreement that the company should keep the higher basis does not establish the statutory alternative.
Compare the asset-basis and stock-basis outcomes
Assume an owner contributes a single investment asset with $100,000 adjusted tax basis and $70,000 fair market value in an otherwise qualifying section 351 exchange, with no liabilities or other property. The $30,000 net built-in loss cannot generally remain duplicated in both the corporate asset and the owner's stock basis. Under the default rule, the corporation's asset basis is reduced to $70,000 while the owner's stock basis follows the applicable transfer rules. With a valid joint election shifting the reduction, the corporation can retain the $100,000 asset basis and the owner's stock basis is reduced as required, to $70,000 under these simplified facts. Neither route creates an immediate $30,000 deduction. The example isolates one asset; multiple assets, recognized gain, liabilities, and different transferors require the actual allocation and computation rules.
Build the calculation separately for each transferor
Collect adjusted tax basis, fair market value, asset type, holding period, prior depreciation, and recognized gain information for all transferred property. Determine the relevant aggregation and allocation by transferor rather than netting unrelated owners' gains and losses indiscriminately. Preserve valuation support as of the transfer date. A financial statement impairment does not necessarily establish fair market value or tax basis. If the company receives both loss and appreciated assets, compute the statutory net built-in-loss test before adjusting any individual asset. Reconcile the resulting corporate asset register and owner stock schedule with the incorporation closing file. An owner transferring property at historical cost should not assume the company's books establish federal tax basis. Document each adjustment and its reason so later depreciation and disposition calculations can identify which basis rule applied.
Compare who can use the preserved loss economically
The alternative election places different future tax consequences on the corporation and shareholder. Consider whether the corporation expects to sell or use the asset, whether any resulting loss would be capital or ordinary, the owner's expected stock disposition, and applicable loss limitations. A corporate capital loss may not offset ordinary operating income, while an owner's later stock loss has its own rules. Do not compare only nominal basis amounts without asking when and by whom a loss could actually be recognized. If multiple shareholders contribute assets, address whether the chosen basis result creates economic differences or consent issues. The tax election should coordinate with the ownership agreement and contribution values. A higher corporate basis can be valuable, but the owner's reduced stock basis may increase later stock gain or reduce a loss.
Execute the election before treating it as final
Follow the applicable regulation's statement, consent, and filing requirements and retain the executed documents with both returns' permanent support. Confirm which party files which information and the relevant deadline. A preparer should not assume the election exists solely because a prior depreciation schedule retained the old basis. If the default rule applies, make the asset adjustment clearly and preserve the owner's stock calculation. The practical result is a deliberate placement of the net built-in loss without double counting it. This lets owners contribute property for valid business reasons while understanding why tax basis may differ from both contributed value and book equity. The incorporation decision should include this basis consequence before assets are transferred, rather than leaving a future sale to expose duplicated losses that were never legally available.
Sources & further reading
Consult the original guidance and its effective dates. These references support the educational discussion; their application depends on the specific facts.