What it means
Changing brokers used to mean selling everything, moving the cash and buying the holdings again, with tax bills and market risk along the way. ACATS exists so the holdings themselves travel instead.
The system is operated by the National Securities Clearing Corporation, part of the Depository Trust & Clearing Corporation. The process starts with the new broker, not the old one.
The customer signs a transfer initiation form at the receiving firm, which then requests the account from the delivering firm. The two firms exchange account data electronically, the delivering side confirms the holdings, and the assets are re-registered at the new firm.
A typical transfer completes in about a week. Some products, such as certain options, annuities and a firm's own proprietary funds, can take longer or may not transfer at all, and those positions may have to be sold first.
Fractional shares are another common leftover. Costs are modest but real.
The delivering firm commonly charges an outgoing transfer fee, while many receiving firms offer a rebate to win the account, so asking about credits is worth one email. Tax lot records and purchase dates usually travel with the shares, which preserves the information that decides future capital gains.
Failed transfers have predictable causes: mismatched account names, missing documents, or assets the new firm cannot hold. Checking those three before starting prevents most delays.
After the move, compare every position, tax lot and cash balance against the old statement while errors are still cheap to fix. For a manager overseeing company investments or employee equity, ACATS turns a change of custodian into an administrative project of weeks and not a market event.
Retirement accounts use similar rails, and moving an IRA directly between custodians avoids the tax traps of a personal withdrawal and redeposit. The wider lesson for any service contract is to ask about the exit before signing.
In practice
Real-world examples.
Example
An investor unhappy with her broker's fees opens an account at a cheaper firm and signs one form. Eight days later her shares, funds and cost basis history appear at the new broker, unsold and intact. She avoids both the sales commission and the tax bill that selling and rebuying would have caused.
Example
A retiree consolidates three old brokerage accounts into one. Two transfer cleanly, but the third holds a proprietary fund that must be sold first, so he plans the sale around the tax year boundary. He keeps the other two transfers moving instead of waiting for the awkward one.
Example
A company treasurer moves the firm's surplus investment account to a new custodian. Name mismatches between the corporate resolutions and the account title stall the transfer until corrected paperwork arrives. The treasurer learns to match the legal name on the account exactly with the name on the transfer form.
Case study
Seen in the real world.
This case study is fictional and illustrative. Marlow Design Studio, an invented consultancy, decides to move its investment account to a cheaper broker. The finance director lists every position first, flags two products that cannot transfer, and starts the ACATS request at the new firm.
The transferable 95% of the portfolio arrives in six business days with tax lots intact, and she schedules the two exceptions separately. The project closes inside the month she promised her board, and her checklist becomes the firm's standard for any future custodian change.
The checklist has four steps: list every position and flag anything proprietary, confirm the exact account title, start the request at the receiving firm, and reconcile every lot against the old statement within a week. The illustrative firm credits the list with keeping the move quiet, since no employee or client noticed any disruption.
Watch out
Common mistakes.
- Selling the holdings before transferring, which triggers taxes and market exposure that the transfer system exists to avoid.
- Starting the request at the old broker, when the receiving firm normally drives the process and starting there is faster and less awkward.
- Assuming everything will transfer, when proprietary funds, some options and fractional leftovers often cannot move and need a separate plan.
Questions
People also ask.
How long does a transfer take?
Most complete in about a week once both firms validate the request, although name mismatches or unusual assets can stretch that. Clean paperwork and an exact account title are the quickest way to avoid delay.
Does transferring trigger tax?
Moving positions unsold with their cost basis does not itself realise a gain, but assets sold because they cannot transfer can create a tax event.
What does it cost?
The delivering firm often charges an outgoing transfer fee and many receiving firms reimburse it on request, so ask both firms about fees and credits before you start. A short email before the transfer often removes the cost entirely.
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