An IPI number (Interested Party Information number) is a unique 9-to-11-digit ID that follows you across the global royalty system and tells every collection society which songwriter or publisher is owed money. You don't apply for one directly — a Performing Rights Organization (ASCAP, BMI, or SESAC) assigns it the moment you join, and from then on it becomes the single thread that connects your name to every song you write, register, and earn from. Without a correct IPI number on your works, your performance and mechanical royalties can sit unmatched indefinitely.
This matters more than most indie creators realize. The Mechanical Licensing Collective has collected more than $2 billion in mechanical royalties, but close to $1 billion remains unclaimed — largely because of metadata mismatches, including missing or wrong IPI numbers (Orphiq / industry reporting, 2025). A June 2025 PRO report found that up to 15% of indie music submissions contained metadata errors that delayed or blocked royalty payment (Studio814, 2025). Your IPI is one of the easiest of those errors to prevent.
If you've already read our explainers on the ISRC and ISWC, the IPI is the third identifier in the trio — and arguably the most personal, because it identifies you, not your song or your recording.
Last Updated: June 2026
What is an IPI number, exactly?
An IPI number (also called a CAE number, for "Compositeur, Auteur, Editeur") is a unique identifier assigned to songwriters, composers, and music publishers so collection societies worldwide can match royalties to the right rightsholder. It is administered through the CISAC network and shared across more than 120 collective management organizations globally (ASCAP, 2026).
Think of the IPI as your social-security number inside the music royalty system. Your songs come and go, your recordings each get their own ISRC, and each composition gets its own ISWC — but your IPI stays the same for your entire career. Every PRO, sub-publisher, and the MLC can look you up by that one number, even if your name is spelled differently on a foreign cue sheet or a co-writer fat-fingered it on a split sheet.
The "CAE number" you sometimes see is the older name for the same thing. ASCAP, BMI, and SESAC all use "IPI" and "CAE" interchangeably; if a registration form asks for either, the 9-to-11-digit number is what they want (BMI, 2026).
How do I get an IPI number for free?
You cannot apply for an IPI number on its own. It is issued automatically when you affiliate with a Performing Rights Organization as a writer or a publisher. Here is the practical path for a U.S.-based indie creator in 2026:
- Join a PRO as a writer. ASCAP and BMI both have open enrollment and are free to join. SESAC and GMR are invite-only. When your writer account is approved, your writer IPI is assigned.
- Register a publisher entity (if you self-administer). When you set up your own publishing company with the same PRO, the PRO assigns a separate publisher IPI. Self-administered songwriters should have both.
- Locate the number in your PRO portal. Your IPI appears in your member profile, usually under your account or works-registration section.
- Carry it everywhere. Add your IPI to every split sheet, every work registration at the MLC, and every distributor publishing field.
The cost is zero through ASCAP and BMI. Anyone telling you to pay a third party for an "IPI registration service" is charging you for something the PRO does for free.
Writer IPI vs publisher IPI: why you need both
This is the single most common gap we see in indie catalogs. A songwriter joins a PRO, gets a writer IPI, and assumes they're done. But royalties split into two halves: the writer's share and the publisher's share. If you never set up a publisher entity, the publisher's share of your performance royalties can go uncollected — or get swept into a black-box pool.
A self-administered songwriter with both IPIs collects 100% of their performance royalties. A songwriter with only a writer IPI is, in effect, leaving the publisher's share (typically 50% of performance royalties) on the table unless a third-party administrator is catching it for them. We covered the broader version of this problem in our piece on black box royalties — missing publisher IPIs are a feeder pipe straight into that pool.
| Writer IPI | Publisher IPI | |
|---|---|---|
| Who it identifies | You as the creator | Your publishing entity |
| Collects | Writer's share (~50%) | Publisher's share (~50%) |
| Assigned when | You join a PRO as a writer | You register a publisher with the PRO |
| Needed by self-admin artists? | Yes | Yes |
| Cost | Free (ASCAP/BMI) | Free (ASCAP/BMI) |
IPI vs ISWC vs ISRC vs ISNI: which identifier does what?
Indie creators constantly confuse these, and the confusion costs money because they put the wrong code in the wrong field. Here's the clean breakdown:
| Identifier | What it tags | Who issues it | Used for royalties? |
|---|---|---|---|
| IPI / CAE | A person or publisher (you) | PROs via CISAC | Yes — matches money to rightsholders |
| ISWC | A composition (the song) | CISAC / PROs | Yes — tracks the underlying work |
| ISRC | A specific recording | Distributor / label | Yes — tracks the master |
| IPN | A performer (artist/musician) | Collective Management Orgs | Yes — neighboring rights |
| ISNI | A public identity (band/person) | ISNI registry | No — attribution only |
The key insight: IPI identifies the people, ISWC identifies the song, ISRC identifies the recording. A single track involves all three at once. Your IPI is attached to your name; the ISWC is attached to the composition you wrote; the ISRC is attached to the master that was released (The MLC "Know Your Identifiers," 2026).
One more often-missed identifier: the IPN (International Performer Number) is the performer's equivalent of the IPI, issued by collective management organizations and used for neighboring rights and sound-recording performance royalties. If you're both the writer and the performer, you may hold an IPI and an IPN. We break down the performer side in our neighboring rights guide.
Why does a missing or wrong IPI cost me royalties?
When a streaming service reports usage, or a foreign society collects performance money on your behalf, the matching engine tries to connect that usage to a rightsholder. It does this by reading the metadata — including the IPI. When the IPI is missing, the system falls back to name-matching, which is notoriously unreliable across spelling variations, accents, legal-name-vs-stage-name mismatches, and duplicate names.
Here's where the money actually leaks for indie creators:
- MLC mechanical royalties. The MLC uses IPI numbers to match U.S. mechanical royalties to songwriters (The MLC IPI resource, 2026). A missing IPI on a registered work makes a match far less certain.
- Foreign performance royalties. When a song plays overseas, the local society uses your IPI to route money home through the CISAC network. No IPI, no clean route.
- Co-writer splits. If your co-writer registers the song but enters your name without your IPI, your share may be flagged as a conflict or held.
- Publisher-share leakage. No publisher IPI means the publisher's half of performance royalties may never reach you.
The scale of the problem is documented. The MLC's roughly $1 billion in still-unclaimed royalties is driven substantially by metadata mismatches, and in the UK, PRS for Music has reported that millions of pounds go unclaimed every year for the same reason (metadata reporting, 2025). More than 60% of independent artists running active streaming promotion have never even created an MLC member account (NotNoise, 2026) — and you can't supply a clean IPI to a system you never joined.
How to make sure your IPI is working for you in 2026
Getting the number is step one. Making it actually collect money is step two. Here's the checklist we walk creators through:
- Confirm you have both a writer and publisher IPI if you self-administer. Log into your PRO and verify both entities exist.
- Add your IPI to every MLC work registration. When registering works in the MLC portal, you can search for and attach writers by IPI — use it (MLC registration support, 2026).
- Put your IPI on every split sheet at the session. Don't wait until release. Capture each contributor's legal name, role, share, and IPI before anyone leaves the room. (See our split sheet guide.)
- Audit your distributor's publishing fields. Many distributors collect an IPI field for publishing administration — a blank one means downstream registrations may be incomplete.
- Reconcile across systems. Your IPI in your PRO, at the MLC, and with any sub-publisher should match exactly. One stray digit breaks the chain.
This kind of cross-system reconciliation is exactly what RoyaltyCoPilot.ai was built to automate. Instead of manually cross-checking your IPI, ISWC, and ISRC across the MLC, SoundExchange, and your PRO, RoyaltyCoPilot.ai scans your catalog, flags the works where your identifiers don't line up, and shows you where unclaimed money is likely hiding.
Does the 2026 rate increase make this more urgent?
Yes — every royalty you fail to match is now worth more. As of January 1, 2026, the headline streaming mechanical rate rose to 15.3% of a service's U.S. revenue, up from 15.25% (American Songwriter, 2026). The statutory mechanical rate for physical and download also climbed to 13.1 cents per work, up from 12.7 cents in 2025.
On top of the ongoing rate, songwriters and publishers were determined to be owed nearly $400 million in catch-up payments after the Copyright Royalty Board's final Phonorecords determination (The MLC / Billboard, 2026). A correctly registered IPI is what lets the matching engine route your slice of those pools to you instead of into the black box.
What changed for IPI numbers in 2026?
The infrastructure around identifiers keeps tightening. CISAC launched an "ISWC IPI Context Search" tool to help publishers resolve metadata conflicts by cross-referencing works against rightsholder IPIs (CISAC, 2025). Separately, ISNI registration for the music industry became free and automated, lowering the friction to building a complete identifier stack (ISNI.org). The practical takeaway: the matching systems are getting smarter, but they reward creators whose identifiers are complete and consistent — and penalize those who leave gaps.
Frequently asked questions about IPI numbers
How do I find my IPI number? Log into your PRO member portal (ASCAP, BMI, or SESAC). Your IPI/CAE number is listed in your member profile, usually near your account details or works-registration area. If you have a publisher entity, look for a second, separate IPI under that account.
Is an IPI number the same as a CAE number? Yes. "CAE" is the older term and "IPI" is the current one; they refer to the identical 9-to-11-digit number. If a form asks for a "CAE/IPI number," enter the same code.
Can I have more than one IPI number? Yes — and many self-administered creators should. You get one IPI as a writer and a separate IPI for your publishing entity. Both are legitimate and serve different royalty streams.
Do I need an IPI if I use a publishing administrator like Songtrust? You still have a writer IPI from your PRO, but the administrator may use its own publisher IPI to collect on your behalf. Confirm with your admin which IPI is registered where so nothing falls through the cracks.
Does the MLC require an IPI number? The MLC uses IPI numbers to match mechanical royalties and lets you search for writers by IPI during registration. While you can register without perfect data, supplying your IPI dramatically improves match accuracy (The MLC, 2026).
What's the difference between an IPI and an ISNI? An IPI is used to route royalties to rightsholders. An ISNI is a cross-industry identity code used for attribution and to organize your artist profile — it does not directly collect royalties. They complement each other but aren't interchangeable.
Do performers need an IPI or an IPN? Songwriters and publishers use IPIs. Performers (featured and non-featured) are identified by an IPN for neighboring-rights and sound-recording performance royalties. If you write and perform, you may hold both.
How long does it take to get an IPI number? It's assigned when your PRO membership is approved. ASCAP and BMI approvals typically range from a few days to a couple of weeks, after which your IPI appears in your portal.
The bottom line
Your IPI number is the quiet backbone of your entire royalty life. It's free, it's permanent, and it's the single piece of metadata that tells the global system "this money belongs to this person." Yet a missing writer IPI, an absent publisher IPI, or one mistyped digit is enough to send your earnings into the unclaimed pile — and with nearly $1 billion already sitting unmatched at the MLC, you do not want to be a contributor to that number.
Get your writer IPI and your publisher IPI, put both on every work and every split sheet, and reconcile them across the MLC, your PRO, and SoundExchange. If you'd rather not chase identifier mismatches by hand, RoyaltyCoPilot.ai runs a free catalog audit that flags exactly where your IPI, ISWC, and ISRC data is breaking the chain — so the royalties the 2026 rate increase made bigger actually reach you.
RoyaltyCoPilot.ai helps independent artists, songwriters, producers, and publishers discover and recover unclaimed royalties from the MLC, SoundExchange, and their PRO. This article is educational and not legal or financial advice.