Under the priority rules of UCC Article 9, when more than one creditor claims the same piece of personal property as collateral, the creditor who was first to either file a financing statement or perfect its security interest generally wins. That single sentence resolves most contests, but Article 9 layers several exceptions on top of it: purchase-money lenders can leapfrog earlier filers, lien creditors and bankruptcy trustees can defeat unperfected interests, federal tax liens follow their own clock, fixtures require filing in a different office, and certain buyers take collateral free of any security interest at all.
The Baseline Rule: First to File or Perfect
When two secured creditors hold interests in the same collateral, priority goes to whichever was first in time, measured by the earlier of filing or perfection.1Legal Information Institute. UCC 9-322 – Priorities Among Conflicting Security Interests The date of the security agreement does not matter. Neither does the date the money changed hands. If a lender files a UCC-1 in January but doesn’t fund the loan until March, its priority still dates from January. That lets lenders lock in position while deal terms are still being negotiated.
Two tiebreakers fill in the rest of the ladder. A perfected security interest always beats an unperfected one, regardless of who got there first. And if neither creditor has perfected, the one whose interest attached first wins.1Legal Information Institute. UCC 9-322 – Priorities Among Conflicting Security Interests Attachment itself requires three things to coincide: the creditor gives value, the debtor has rights in the collateral, and the parties have an agreement describing the collateral.
Future advances under the same filing keep their priority. When a security interest is perfected by filing, later disbursements relate back to the original filing date, so a revolving facility secured by a 2024 UCC-1 doesn’t lose rank on draws made in 2026.2Legal Information Institute. UCC 9-323 – Future Advances The exception is narrow and applies mainly where perfection depends on automatic or temporary perfection rather than filing or possession.
What “Perfected” Means for Priority Purposes
The priority rules only work if you know whether a creditor is perfected. A security interest is perfected once it has attached and the creditor has completed the applicable perfection step.3Legal Information Institute. UCC 9-308 – When Security Interest or Agricultural Lien Is Perfected The most common step is filing a UCC-1 financing statement with the appropriate state filing office, usually the Secretary of State where the debtor is located. An individual debtor is located at their principal residence; a registered organization is located in its state of formation, so a Delaware LLC operating entirely in Texas requires a Delaware filing.4Legal Information Institute. UCC 9-307 – Location of Debtor
Other methods substitute for filing in specific situations: possession of tangible items like negotiable instruments or jewelry, control agreements for deposit accounts and investment property, and automatic perfection for consumer-goods purchase-money loans.5Legal Information Institute. UCC 9-309 – Security Interest Perfected Upon Attachment The method matters because an automatically perfected interest leaves no public record, which creates an exposure covered below under buyers.
Purchase-Money Super-Priority
A purchase-money security interest (PMSI) is the main exception to first-to-file-or-perfect. When a lender advances the specific funds a debtor uses to acquire a particular asset, that lender can take priority over an earlier-filed secured creditor, even one holding a blanket lien on all present and future property of the debtor.6Legal Information Institute. UCC 9-324 – Priority of Purchase-Money Security Interests Without this rule, a single lender with a broad after-acquired-property clause could effectively block the debtor from financing new equipment or inventory anywhere else.
Equipment PMSIs
For equipment and other non-inventory goods, the PMSI lender must file a financing statement within 20 days after the debtor takes possession.6Legal Information Institute. UCC 9-324 – Priority of Purchase-Money Security Interests A timely filing gives the lender priority dating back to the delivery. Miss the 20-day window and the interest still exists, but it drops into the ordinary first-to-file-or-perfect queue and loses to any earlier filer.
Inventory PMSIs
Inventory PMSIs carry stricter requirements because existing inventory lenders rely on a stable collateral pool. The PMSI lender must perfect before the debtor receives the goods, and must also send an authenticated notice to every creditor who has already filed against the debtor’s inventory, identifying the sender’s PMSI and describing the inventory. The notice has to reach each prior filer before the debtor takes possession, and it remains effective for five years.6Legal Information Institute. UCC 9-324 – Priority of Purchase-Money Security Interests A timely filing without the notice means no super-priority.
Priority in Proceeds
Collateral moves. When a debtor sells, leases, or otherwise disposes of secured property, the security interest automatically attaches to any identifiable proceeds. Perfection in those proceeds is automatic for 20 days. After that, the interest becomes unperfected unless the proceeds are identifiable cash proceeds, the original financing statement already covers the type of collateral the proceeds became and was filed in the same office, or the creditor takes a separate perfection step within the 20-day window.7Legal Information Institute. UCC 9-315 – Secured Party’s Rights on Disposition of Collateral and in Proceeds In practice, cash proceeds stay perfected indefinitely as long as the creditor can identify them. Non-cash proceeds that change collateral type (equipment proceeds that become an account receivable, for example) require a check that the original filing still covers the new category.
Commingled funds complicate tracing. When proceeds flow into a bank account holding other money, the creditor must trace through accepted equitable methods, and the amount recoverable shrinks to the lowest balance the account hit during the relevant period.
Lien Creditors and the Bankruptcy Trustee
A lien creditor is someone whose interest arises from a court process rather than a voluntary agreement, including a judgment creditor who has levied and a trustee in bankruptcy.8Legal Information Institute. UCC 9-102 – Definitions and Index of Definitions The rule for contests between a secured party and a lien creditor is a plain race: the security interest loses to any lien creditor who gets a lien before the security interest is perfected.9Legal Information Institute. UCC 9-317 – Interests That Take Priority Over or Take Free of Security Interest Hours can matter. A sheriff who levies at 2 p.m. beats a creditor who files its UCC-1 at 3 p.m.
The bankruptcy consequence is severe. Because the trustee is treated as a hypothetical lien creditor as of the petition date, any security interest that was unperfected the moment the petition was filed can be avoided entirely, leaving the lender holding an unsecured claim against the estate.
Federal Tax Liens
Federal tax liens operate under the Internal Revenue Code rather than Article 9. A federal tax lien is not valid against a holder of a security interest until the IRS files its notice of lien.10Office of the Law Revision Counsel. 26 USC 6323 – Validity and Priority Against Certain Persons A security interest perfected before the IRS files generally keeps its priority.
Advances made after the tax lien notice is filed are the risk area. The 45-day rule protects disbursements made within 45 days after the IRS filing, provided the collateral was covered by a written agreement entered into before the lien was filed and the interest is perfected under local law.11eCFR. 26 CFR 301.6323(d)-1 – 45-Day Period for Making Disbursements After day 45, any new advance drops behind the IRS unless the arrangement qualifies as a commercial transactions financing agreement or another protected category.10Office of the Law Revision Counsel. 26 USC 6323 – Validity and Priority Against Certain Persons Lenders running revolving facilities need to monitor tax lien filings or risk advancing fresh money into a subordinate position.
Fixtures and Real Property Conflicts
Fixtures sit at the overlap of Article 9 and real estate law, and the priority rules reflect that split. A creditor with a PMSI in a fixture gets the strongest position if it files a fixture filing in the local real property records either before the goods become fixtures or within 20 days after.12Legal Information Institute. UCC 9-334 – Priority of Security Interests in Fixtures and Crops A fixture filing goes to the office where mortgages are recorded, usually the county recorder, not the Secretary of State.13Legal Information Institute. UCC 9-501 – Filing Office A lender who files a flawless UCC-1 with the state but skips the county filing has no priority against the mortgage holder.
Without a PMSI, a secured party can still beat a real estate interest by recording its fixture filing before the mortgage or other encumbrance is recorded.12Legal Information Institute. UCC 9-334 – Priority of Security Interests in Fixtures and Crops One exception runs the other way: a recorded construction mortgage beats a fixture security interest if the mortgage was recorded before the goods became fixtures and the goods were installed before construction was complete.
Buyers Who Take Free of a Security Interest
Priority can disappear entirely when the debtor sells the collateral. A buyer in the ordinary course of business takes goods free of any security interest created by the seller, even a perfected one, and even if the buyer knows about it.14Legal Information Institute. UCC 9-320 – Buyer of Goods The buyer has to be purchasing from someone in the business of selling that kind of goods: a car from a dealership, lumber from a building supply store. Retail commerce depends on this rule. One carve-out: buyers of farm products from a farmer do not get this protection under the UCC, though federal law covers those transactions separately.
Consumer-to-consumer sales follow a parallel but tighter rule. A person who buys consumer goods from another consumer takes free of a security interest only if the buyer lacks knowledge of the interest, pays value, buys for personal or household use, and no financing statement has been filed covering the goods.14Legal Information Institute. UCC 9-320 – Buyer of Goods That last condition exposes a hidden weakness in automatic perfection of consumer-goods PMSIs. Because no filing is required, no public record exists to put a secondhand buyer on notice, and the interest can be wiped out in a resale. A lender who wants to preserve its claim against future buyers should file a UCC-1 even though it isn’t required for perfection.
How a First-Place Creditor Loses the Race
Priority established by filing is not permanent. A standard UCC-1 is effective for five years. If it lapses without renewal, the security interest becomes unperfected, and against purchasers for value it is treated as if perfection never occurred.15Legal Information Institute. UCC 9-515 – Duration and Effectiveness of Financing Statement A creditor that held first position for five years can suddenly drop below everyone else because a calendar reminder was missed.
To keep the filing alive, the creditor must file a continuation statement within the six-month window immediately before expiration.15Legal Information Institute. UCC 9-515 – Duration and Effectiveness of Financing Statement Too early is ineffective; a day late is too late. A timely continuation extends the filing another five years and can be repeated indefinitely. Public-finance and manufactured-home filings get a 30-year initial period, and transmitting-utility filings last until a termination statement is filed. Everyone else is on a five-year clock, and the priority rules reward the creditor who treats that clock as part of the deal.