Guide
Cost Basis After a Broker-to-Broker Transfer: Why Records Get Lost
Published 2026-07-15 · Reviewed 2026-07-15 · Topic: cost basis after broker transfer
Why cost basis can look incomplete after changing brokers, what documents help, and how local document organization differs from tax filing software.
Common reasons basis looks wrong after a move
Firms may treat older or noncovered securities differently from covered lots. Transfers can arrive before historical lot details are fully posted. Corporate actions, wash-sale adjustments, and inherited or gifted lots add complexity that does not always map cleanly between systems.
FINRA emphasizes that investors should review basis information firms report and maintain their own supporting records. When records are inadequate, tax outcomes can be less favorable.
What to compare side by side
Compare the last complete statement from the delivering firm with the first detailed holdings/tax-lot views at the receiving firm. Note symbols, share quantities, acquisition dates if shown, and whether lots are marked covered or noncovered.
If figures disagree, open a case with the receiving firm and keep written responses. A personal document archive makes those conversations faster because you can point to exact statement pages.
Where Investment Vault helps—and where it stops
Investment Vault helps organize multi-broker PDF evidence, review extracted events, and keep confirmed history linked to sources on your device. It does not file taxes, calculate final IRS-ready basis with certainty, or guarantee that reconstructed figures will be accepted.
Use organized exports and source links to support work with your broker and tax professional—not as a substitute for them.
Sources
Organize documents with Investment Vault
Import supported brokerage PDFs, review extracted events, and build a source-linked ownership history locally on your device. Beta access is limited.