What Is ACAT
The backbone of every brokerage-to-brokerage transfer
ACAT — the Automated Customer Account Transfer Service — is the standardized system that moves securities between brokerage firms in the United States. It’s operated by the National Securities Clearing Corporation (NSCC), a subsidiary of the Depository Trust & Clearing Corporation (DTCC).
Before ACAT existed, transferring stock between brokers meant physical certificate delivery, weeks of waiting, and frequent errors. ACAT was created to solve this — providing an electronic, standardized pipeline governed by FINRA Rule 11870, which requires the delivering firm to complete transfers within specific timeframes.
NSCC / DTCC
Central clearinghouse that processes all ACAT transfers electronically
FINRA Rule 11870
Requires brokers to complete transfers within 3–6 business days
In-Kind Movement
Shares transfer as-is — no liquidation, no taxable event
“ACAT is the reason you can move $5M in NVIDIA stock from Schwab to Fidelity in three days — without selling a single share or owing a single dollar in taxes.”
For investors holding appreciated positions, this matters enormously. ACAT is the mechanism that makes it possible to reposition assets — whether consolidating accounts, changing advisors, or contributing shares to a fund structure — without creating a taxable event.
Full vs Partial Transfers
Choose precision when concentrated stock is involved
ACAT supports two transfer types. The choice between them has practical implications for timeline, cost, and — critically for concentrated stockholders — which specific lots move.
| Full ACAT | Partial ACAT | |
|---|---|---|
| What moves | All eligible assets | Only selected positions |
| Timeline | 3–6 business days | 1–3 business days |
| Account status | Old account closes | Old account stays open |
| Lot selection | No control — everything moves | Specify exact lots |
| Cash residual | Cash transfers with assets | Cash stays unless specified |
| Best for | Switching brokers entirely | Contributing to a fund or SPV |
For concentrated stockholders, partial ACAT is almost always the right choice. It lets you select the specific tax lots you want to contribute — choosing lots with the highest unrealized gain, the longest holding period, or whatever matches your tax strategy. A full transfer gives you no control over which lots arrive first.
When to use full ACAT
Use a full transfer when you’re consolidating all assets at a new custodian — switching from Schwab to Fidelity, for example. It’s simpler but slower, and the old account will close once complete.
When to use partial ACAT
Use a partial transfer when contributing specific lots to an SPV, exchange fund, or new advisory account — while keeping the rest of your portfolio at your existing broker. This is how most Embark contributions work.
Step-by-Step Process
From initiation to settlement — what happens each day
The key thing to know: the receiving firm initiates the transfer, not you and not the delivering firm. You contact your new broker (or the fund custodian), provide your existing account details, and they submit the ACAT request through NSCC.
You initiate with the receiving firm
Provide account number, firm name, and a recent statement from your current broker. Sign the Transfer Initiation Form (TIF).
Receiving firm submits ACAT request via NSCC
The request hits NSCC’s system and is routed to the delivering firm. The delivering firm has one business day to validate or reject.
Delivering firm validates the request
They confirm account details, check for holds, margin, or unsettled trades. If anything is wrong, they issue a reject code. If valid, they freeze the account for transfer.
Assets begin moving through NSCC
Securities are re-registered at DTC from the delivering firm’s account to the receiving firm’s account. For partial ACAT, this is often the final step.
Residual sweep and cost basis transfer
Cash balances, fractional shares, and cost basis data are swept from delivering to receiving firm. Some brokers liquidate fractional shares — check beforehand.
Transfer complete — assets available at new firm
Full ACAT is settled. Your positions, cost basis, and holding periods are now reflected in the receiving account. Old account closes (full ACAT) or continues (partial).
Partial ACAT is faster
Because the delivering account stays open and there’s no residual sweep, partial transfers often complete by Day 3. This is one reason fund custodians prefer partial ACAT for contribution workflows.
What Can and Can’t Transfer
Not everything in your account is ACAT-eligible
ACAT handles most standard securities, but certain asset types must be liquidated, transferred manually, or left behind. Knowing what’s eligible prevents surprises mid-transfer.
| ACAT Eligible | Not ACAT Eligible |
|---|---|
| Common & preferred stocks | Annuities |
| ETFs (exchange-traded funds) | Guaranteed investment contracts (GICs) |
| Corporate & government bonds | Proprietary mutual funds (some) |
| Mutual funds (if receiving firm has agreement) | Limited partnerships |
| Listed options | Physical stock certificates |
| Treasury securities | Bank products (CDs held at brokerage) |
| Unit investment trusts (UITs) | Certain alternative investments |
| Cash balances | Cryptocurrency (at most firms) |
Mutual fund compatibility
Mutual funds transfer via ACAT only if the receiving firm has a selling agreement with the fund family. Otherwise, the delivering firm will liquidate the position before transfer — which does trigger a taxable event. Confirm compatibility before initiating.
Account type matching
ACAT requires account types to match: individual to individual, joint to joint, IRA to IRA. You cannot ACAT transfer from an individual account into a joint account. Mismatched account types are a leading cause of rejection.
Cost Basis Preservation
The most important thing that travels with your shares
When you own appreciated stock, cost basis is everything. It determines how much tax you owe when you eventually sell. Losing or corrupting cost basis during a transfer can mean overpaying taxes by thousands — or triggering an IRS audit when your reported basis doesn’t match your broker’s records.
The Cost Basis Reporting System (CBRS) is the mechanism that transfers basis information between brokers alongside the ACAT transfer. It was mandated by the Emergency Economic Stabilization Act of 2008 and phased in starting in 2011.
Covered Securities
Stocks acquired after January 1, 2011 are “covered” — brokers are legally required to track and transfer cost basis, including acquisition date, purchase price, and lot identification.
Cost basis transfers automatically through CBRS. The receiving broker receives lot-level detail.
Noncovered Securities
Stocks acquired before 2011 (or with complex corporate actions) are “noncovered.” The delivering broker is not required to transfer basis data.
You are responsible for documenting and reporting the correct cost basis to the IRS. Get written records before transferring.
“For noncovered shares, your broker may transfer a $0 cost basis by default — effectively overstating your gain by the full position value. Always verify lot-level records before initiating.”
Lot selection matters. If you’re contributing shares to a fund via partial ACAT, the specific lots you choose affect the embedded gain in the contributed position. Working with your advisor to select lots with the highest appreciation — or the longest holding period — can optimize the tax deferral benefit of the contribution.
Common Pitfalls
Why transfers get rejected — and how to prevent it
ACAT rejections are frustrating because they reset the clock. The delivering firm sends a reject code, the receiving firm notifies you, and you have to fix the issue and re-initiate. Here are the most common causes — all of which are preventable.
Unsettled Trades
Trades settle T+1 (as of May 2024). If you sold a stock yesterday and initiate a transfer today, the pending settlement will block the ACAT. Wait for all trades to settle before requesting the transfer.
Outstanding Margin Balance
If your account has a margin debit, the delivering firm will reject the transfer. Pay down all margin before initiating. Even a small margin balance — sometimes from interest accrual — will block the entire ACAT.
Account Information Mismatch
The name, SSN/TIN, and account type on both accounts must match exactly. If your delivering account says “John A. Smith” and the receiving account says “John Smith,” the ACAT may be rejected. Verify details before submitting.
Account Type Mismatch
Individual to joint, taxable to IRA, trust to individual — these are not ACAT-compatible pairings. The account registration type must match on both sides. IRA-to-IRA is fine; IRA-to-individual is not.
Active DRIPs or Recurring Investments
Dividend reinvestment plans and automatic investment schedules can create new fractional positions during the transfer window, causing mismatches. Disable all automated features at least one business day before initiating.
Transfer Fees from the Delivering Firm
Many brokers charge $50–$75 as an account transfer fee. This is charged by the delivering firm. The good news: receiving firms often reimburse this fee, especially for accounts over $25K. Ask before you transfer — and keep the fee statement for reimbursement.
Open options positions
Short option positions (covered calls, cash-secured puts) can transfer via ACAT but may complicate the process. Some firms require you to close short options before transferring. Long options transfer more easily but must be with a broker that supports the same option class. When in doubt, close options before initiating.
Tax Implications
In-kind ACAT: zero tax impact — by design
This is the core reason ACAT matters for appreciated stock holders. An in-kind ACAT transfer is not a taxable event. No sale occurs. No gain is realized. Your cost basis, acquisition date, and holding period carry over to the new account unchanged.
| Sell & Re-Buy | In-Kind ACAT | |
|---|---|---|
| Taxable event? | Yes — capital gains realized | No — no sale occurs |
| Cost basis | Reset to new purchase price | Original basis preserved |
| Holding period | Resets to Day 1 | Original period preserved |
| Market exposure gap | Out of market during sell/buy | Continuous — no gap |
| Wash sale risk | Yes, if re-bought within 30 days | Not applicable |
“Selling $2M in stock with a $200K cost basis to ‘move brokers’ would generate roughly $360K in combined federal and state capital gains tax. An in-kind ACAT accomplishes the same move for $0 in tax.”
The exception: liquidating transfers. If you request a full ACAT and the account contains non-ACAT-eligible assets (certain mutual funds, for example), the delivering firm may liquidate those positions before transfer. That liquidation is a taxable event. This is another reason partial ACAT is preferred for appreciated positions — you control exactly what moves and nothing gets liquidated.
DRS as an alternative. The Direct Registration System (DRS) lets you hold shares directly on the company’s books rather than in street name at a broker. DRS transfers are also non-taxable, but they’re slower, less flexible, and not suitable for contributing to fund structures. ACAT remains the standard for broker-to-broker and broker-to-custodian moves.
ACAT for Fund Contributions
How investors use partial ACAT to contribute to SPVs and exchange funds
When you contribute appreciated stock to a fund structure — whether an exchange fund under Section 721 or a single-stock SPV under Section 351 — the physical movement of shares happens through ACAT. The fund’s custodian (typically a prime broker or qualified custodian) initiates a partial ACAT for the specific lots you’re contributing.
This is how Embark receives contributed positions. Here’s what the process looks like:
Investor and Embark agree on contribution terms
Position size, specific lots, contribution agreement signed. Embark’s legal team prepares the subscription documents.
Embark’s custodian initiates partial ACAT
The custodian submits the ACAT request to NSCC specifying the exact share count and, where possible, the specific tax lots to be transferred.
Shares arrive at the SPV’s custodial account
Typically within 1–3 business days. Cost basis and holding period transfer via CBRS. Embark confirms receipt and lot-level detail.
SPV begins income generation
Once shares are held in the SPV account, covered call writing begins. The investor’s original brokerage account is unchanged — only the contributed lots have moved.
Why partial ACAT is ideal for fund contributions
You choose exactly which lots to contribute — typically the ones with the greatest unrealized gain, maximizing the tax deferral benefit. Your remaining positions stay at your existing broker. The investor’s original account remains open and fully functional throughout.
Frequently Asked Questions
Answers to common ACAT questions
Next Steps
Pre-transfer checklist and where to go from here
ACAT is plumbing — powerful, reliable plumbing. It’s the mechanism that lets you move appreciated stock without tax consequences, whether you’re switching brokers, consolidating accounts, or contributing shares to an income-generating SPV. The key is preparation: most transfer failures are preventable.
Settle all pending trades
Wait at least T+1 from your last trade. No pending orders or unsettled activity.
Close or pay off margin balances
Even a small margin debit — including accrued interest — will block the transfer.
Disable DRIPs and automatic investments
Automated features can create fractional positions mid-transfer, causing mismatches.
Verify account type compatibility
Individual → individual, IRA → IRA, joint → joint. Mismatches will be rejected.
Document cost basis and lot details
Get written records — especially for noncovered securities acquired before 2011.
Gather a recent account statement
The receiving firm needs your account number, firm name, and a statement showing current holdings.
Close or manage open option positions
Short options can complicate transfers. Close them before initiating, or confirm both firms support the transfer.
Ask the receiving firm about fee reimbursement
Most firms reimburse the $50–$75 delivering firm fee for accounts over $25K.
Ready to Put Your Stock to Work?
Embark handles the ACAT process when you contribute appreciated shares.
Our team coordinates with your broker and our custodian to execute the partial ACAT — lot selection, cost basis verification, and settlement confirmation — so you don’t have to manage the mechanics.
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