What Is an ACATS Transfer?
Switching brokerages, whether moving between a full-service broker and a discount one or simply consolidating old accounts, used to mean selling everything, moving the cash, and buying it all back somewhere else — an approach that could trigger unnecessary taxable events and left an investor out of the market in between. A standardized transfer system changed that.
The short answer
ACATS, short for the Automated Customer Account Transfer Service, is the standardized system brokerages use to move an account’s holdings directly from one firm to another, generally without selling the underlying investments first. The transfer is initiated at the new, receiving firm rather than the old one, and a full transfer of standard holdings typically completes within about a week.
Who actually starts the process
Somewhat counterintuitively, the account owner doesn’t request the transfer from their old broker directly. Instead, the process starts by opening a new brokerage account at the receiving firm and submitting a transfer request there, which then reaches the delivering firm through the ACATS system on the investor’s behalf. The delivering firm doesn’t initiate the move and generally can’t refuse a properly submitted request, though it may charge its own account-transfer fee. That fee is separate from anything the receiving firm charges, and it’s worth checking for before starting a transfer rather than being surprised by it afterward.
What moves as-is versus what gets liquidated
Most standard, widely held securities — publicly traded stocks, ETFs, and many mutual funds — transfer “in kind,” meaning the exact same holdings simply change custodian without being sold. Some assets don’t transfer as cleanly. Proprietary investment products unique to the delivering firm, certain mutual fund share classes not offered at the new firm, or other non-standard holdings sometimes have to be sold before the transfer, or excluded from it entirely and handled separately. Reviewing a holdings list against what the new firm actually supports before initiating the transfer can avoid an unwelcome surprise partway through.
Why the automated system exists
Before standardized transfers, moving between brokerages could mean manually re-establishing every position, which was slow, error-prone, and could force a sale — and a taxable event — that the investor never wanted in the first place. ACATS was built specifically to let holdings move as a single automated batch, cutting out most of the manual handling and letting an investor consolidate more than one brokerage account without unwinding a portfolio to do it. The system also reduces the amount of time an account sits partially in cash during a transfer, since holdings generally move as securities rather than being converted to cash and reinvested at the new firm.
What the process generally requires
Initiating a transfer typically means providing the receiving firm with the account number and a recent statement from the old account, along with standard identity verification. From there, most of the coordination happens directly between the two firms through the ACATS system, with limited additional action needed from the account owner unless something about the transfer needs manual review, such as a mismatch in how the account is titled between the two firms.
The takeaway
ACATS turned what used to be a disruptive, sell-everything process into something closer to a routine administrative transfer. Understanding that the new firm drives the process, and that not every holding necessarily moves in kind, makes it easier to know what to expect before starting one, rather than assuming every account and every position will move the same way.