401(k) rollover glossary
ACATS Transfer
ACATS is the automated system that moves IRA and brokerage accounts between firms in about a week. Employer 401(k) plans cannot move via ACATS — only rollovers.
ACATS — the Automated Customer Account Transfer Service — is the electronic system run by the National Securities Clearing Corporation that moves investment accounts from one brokerage firm to another. You initiate the transfer at the receiving firm, and your holdings move in-kind: stocks, bonds, ETFs, most mutual funds, options, and cash transfer without being sold.
ACATS moves brokerage accounts and IRAs between broker-dealers, and the account types must match: a Traditional IRA transfers to a Traditional IRA, a Roth IRA to a Roth IRA, a taxable account to a taxable account. You cannot use ACATS to move a taxable account into an IRA or to convert between IRA types — those are different transactions with tax consequences.
The key limitation for anyone leaving a job: employer plans do not ACATS. A 401(k) or 403(b) is not a brokerage account on the NSCC network — money leaves an employer plan only through the plan's own rollover process (a wire or check from the recordkeeper), which typically takes longer and involves more paperwork. The same applies to death claims on a 401(k): they go through the plan administrator's claim process, not ACATS. Once your money is in an IRA, though, every future move between brokerages can use ACATS.
A standard ACATS transfer completes in about five to seven business days once initiated. A few asset types cannot transfer in-kind — proprietary mutual funds the new firm doesn't carry, annuities, bank CDs, and crypto — and must be sold before the transfer or left behind in the old account.
Practical tips: always start the transfer from the receiving firm, make sure the account registration (name, type) matches exactly on both sides to avoid rejects, and avoid trading during the transfer window — the account is typically frozen for a few days while assets move.
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Frequently asked questions
- Can I use ACATS to move my old 401(k) into my brokerage IRA?
- No. Employer plans are not on the ACATS network. Your 401(k) must leave via a direct rollover — the plan's recordkeeper wires the funds or cuts a check to the receiving custodian. After the money lands in an IRA, any future move between brokerage firms can use ACATS.
- Why was my ACATS transfer rejected?
- The most common causes: the name or account registration doesn't match exactly between the two firms, the account types don't match (for example, trying to move a Traditional IRA into a Roth IRA), or the account holds non-transferable assets. Fix the mismatch and resubmit — rejects are routine and not permanent.
- Is an ACATS transfer of my IRA a taxable event?
- No. An ACATS transfer between IRAs of the same type is a trustee-to-trustee transfer — no distribution occurs, no 1099-R is issued, no 60-day clock starts, and it does not count against the one-rollover-per-year limit. You can do as many as you want.
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This glossary entry provides educational information based on IRS rules. It is not tax or legal advice for your specific situation.