Related-Party, Worthless Security, and Disposition Complications

Property-disposition complications covering related-party loss limits, wash sales, abandonments, and multistate sourcing issues.

This chapter covers the rules that complicate an otherwise straightforward disposition answer. Related-party attribution, wash-sale timing, worthlessness, abandonment, and state sourcing can all override the normal gain-or-loss framework if the fact pattern includes the wrong relationship, security, or jurisdiction.

Complex property questions should be checked for override rules after gain or loss is computed. A correct realized-loss number may still be disallowed, deferred, recharacterized, or sourced differently because of the relationship, replacement purchase, property type, or jurisdiction.

In This Chapter

Complex Disposition Lens

Complication First question Common TCP trap
Related-party losses Are attribution or control rules creating related-party treatment? Deducting a loss that is disallowed or deferred.
Wash sales and worthless securities Did the taxpayer replace substantially identical securities or have a timing-specific worthlessness event? Treating every stock loss as currently deductible.
Abandonments and partial dispositions Was property abandoned, partially disposed of, or retired with a basis allocation issue? Applying normal sale logic when no sale occurred.
Multi-jurisdictional sourcing Which state or local jurisdiction can tax or source the disposition? Solving only the federal character and ignoring state sourcing.

Complex Disposition Override Sequence

Step What to do Why it matters on TCP
1. Compute the normal result Determine realized gain or loss, adjusted basis, amount realized, and character before applying special rules. Override rules modify a baseline result; they do not replace the need to compute it.
2. Check related-party status Apply attribution, control, family, entity, and constructive ownership rules. Related-party treatment can disallow losses or defer gain recognition.
3. Test security-specific rules Look for wash sales, substantially identical replacement securities, worthlessness, and timing facts. Securities losses often fail because of replacement purchases or special timing rules.
4. Evaluate non-sale dispositions Consider abandonment, retirement, partial disposition, casualty-like facts, and basis allocation. Not every disposition uses ordinary sale logic.
5. Add jurisdictional sourcing Identify whether state or local sourcing changes the final tax result or reporting obligation. Complex property cases often require both federal character and jurisdictional analysis.

Complex Property Checkpoints

Checkpoint Exam use What to avoid
Baseline result Compute amount realized, adjusted basis, realized gain or loss, and character before override rules. Jumping to a special rule without knowing the normal result being modified.
Relationship test Apply family, entity, control, constructive ownership, and attribution facts. Missing related-party treatment because the parties are not directly named as relatives.
Replacement purchase Check wash-sale timing, substantially identical securities, account ownership, and basis adjustment. Deducting a securities loss when replacement facts defer it.
Non-sale event Identify abandonment, worthlessness, retirement, partial disposition, casualty, or other non-sale disposition. Applying sale proceeds logic when no sale occurred.
State sourcing Add jurisdiction, property location, residency, withholding, and reporting obligations when facts cross states. Treating the federal character answer as the complete tax result.

How to Use This Chapter

  • Read the related-party and wash-sale lessons together because both suspend or delay losses that look deductible at first glance.
  • Keep the state-sourcing lesson in mind when a disposition fact pattern includes property, operations, or withholding across more than one state.

In this section

Revised on Monday, June 15, 2026