How to Split Publishing Royalties: A Co-Writer's Worked Example

Publishing royalties do not come out of a single pool with a single formula. They split across two ownership categories, flow through multiple collection organizations, and arrive on different timelines. Before any of that math is useful, there is a more fundamental question: who owns what percentage of the song?

This is an editorial worked example, not an interactive calculator or a royalty rate guarantee. All figures shown are illustrative estimates based on publicly available rate information and standard industry conventions. The standard FTSMusic disclaimer applies: these numbers are approximations intended to explain the math, not commitments from any PRO, publisher, distributor, or collection organization. For accurate, current rates, consult the MLC, your PRO, and your entertainment lawyer.

The fundamental split: writer's share and publisher's share

Every dollar of publishing income divides in two before it goes anywhere else. Fifty cents on every dollar goes to the writer's share. Fifty cents on every dollar goes to the publisher's share.

This 50/50 division is a convention embedded in the licensing agreements that PROs hold with music users and in how the Mechanical Licensing Collective calculates distributions. It is not a negotiable rate in most standard collection scenarios.

For a self-published songwriter who owns both their writing credits and their publishing rights, both halves ultimately come back to the same person. For a songwriter who has signed a traditional publishing deal, the publisher's share goes to the publisher. For a songwriter in an admin deal, the structure differs by agreement.

Among co-writers, the key number is each co-writer's percentage of the writer's share. That percentage is recorded on the split sheet.

For a deeper look at how performance and mechanical royalties relate to each other, see performance royalties vs. mechanical royalties and the four royalty streams explained.

The split sheet as the foundation

Before walking through the math, it is worth establishing what makes the math enforceable.

A split sheet is a written document, signed by all co-writers, that records each person's agreed ownership percentage of the song. It is not a contract for services. It is a copyright ownership record. PROs, the MLC, and any publisher use the split sheet to determine how to route each royalty payment to each party.

For the worked example below, three co-writers have completed a session and signed a split sheet reflecting the following:

Writer A: 50 percent of the writer's share Writer B: 30 percent of the writer's share Writer C: 20 percent of the writer's share

Each writer is also self-published, meaning each controls their corresponding percentage of the publisher's share as well. This simplifies the example. For more on split sheets and why they matter, see what is a split sheet.

The worked example: dividing a publishing royalty pool

Assume this song generates 400 dollars in total publishing income in a given accounting period. That figure covers both performance royalties and mechanical royalties combined for the period. In practice these arrive separately from different organizations, but for this top-level example we will work with the total first.

Step 1: Divide into writer's share and publisher's share

400 dollars total divided by the 50/50 rule:

Writer's share pool: 200 dollars Publisher's share pool: 200 dollars

Since all three writers are self-published, each one controls their own publisher's share percentage as well as their writer's share percentage.

Step 2: Apply split-sheet percentages to the writer's share

Writer A holds 50 percent of the writer's share: 50 percent of 200 dollars equals 100 dollars Writer B holds 30 percent of the writer's share: 30 percent of 200 dollars equals 60 dollars Writer C holds 20 percent of the writer's share: 20 percent of 200 dollars equals 40 dollars

Total writer's share distributed: 200 dollars. The three figures add up correctly.

Step 3: Apply split-sheet percentages to the publisher's share

Since each writer self-publishes their percentage, the publisher's share follows the same proportions:

Writer A's publisher's share: 50 percent of 200 dollars equals 100 dollars Writer B's publisher's share: 30 percent of 200 dollars equals 60 dollars Writer C's publisher's share: 20 percent of 200 dollars equals 40 dollars

Step 4: Total per-writer payout for the period

Writer A: 100 dollars (writer's share) plus 100 dollars (publisher's share) equals 200 dollars total Writer B: 60 dollars plus 60 dollars equals 120 dollars total Writer C: 40 dollars plus 40 dollars equals 80 dollars total

Total: 400 dollars, which accounts for the full publishing pool. These are illustrative figures for a hypothetical period. Actual amounts depend on the PRO's distribution rate, the mechanical statutory rate, usage volume, and collection timing.

How mechanical and performance royalties follow the same splits

The worked example above treats total publishing income as one pool for simplicity. In practice, mechanical royalties and performance royalties arrive separately through different channels.

Mechanical royalties

In the US, streaming mechanicals are collected by the Mechanical Licensing Collective. The MLC receives reports from streaming platforms, calculates each song's mechanical royalty at the statutory rate set by the Copyright Royalty Board, and pays the publisher or self-published songwriter. Each co-writer's share of mechanicals is their split-sheet percentage applied to the writer's share of mechanicals.

Performance royalties

Performance royalties are collected by the songwriter's PRO. Each co-writer must be individually registered with a PRO and have the song registered in their catalog for their share to be collected. If Writer A is registered with ASCAP and Writer B is registered with BMI, each PRO pays its own affiliated writer directly for their respective share. The publisher's share of performance royalties goes to the publisher or the self-publishing writer who has registered as a publisher member.

For both streams, the underlying math is the same: split-sheet percentage applied to the writer's share of that royalty type. The complexity comes from the collection infrastructure, not from the math itself.

Why the split sheet is the most important document in co-writing

Every calculation in the worked example above depends on the split-sheet percentages being clearly agreed and recorded. Without a signed split sheet, disputes default to equal division regardless of contribution, and collection organizations cannot route payments correctly.

The most common failure point is not malicious intent. It is timing. Writers who complete a session without signing a split sheet often intend to finalize the document later and then never do. By the time the song starts generating royalties, memories of the conversation differ and the legal default of equal splits may no longer match what anyone intended.

Sign the split sheet at the end of the writing session, before the rough recording is mixed and before any release plans are made. The administrative cost of creating it is trivial. The cost of not having it, in a dispute scenario, is not.

For more on how all four royalty streams, recording and publishing, interact across a single track release, see the four royalty streams explained and how to calculate streaming royalties for the recording-side math.