For authors, musicians, inventors, designers and creators of all kinds, some of the most valuable assets are not physical at all: intellectual property and the royalties it produces. A hit song, a bestselling book, a patented invention or a valuable brand can keep generating income for decades – which makes it both an asset and a future income stream, and worth addressing specifically in a prenup. This guide explains how IP and royalties are treated on divorce in England & Wales, what a prenup can do, and why the key issue is almost always drawing the line in time between work created before the marriage and work created during it.
IP is an asset and a future income stream
Intellectual property comes in several forms, each of which can carry value and generate royalties:
- Copyright – books, music, films, software, artwork and the royalties or licensing income they earn.
- Patents – inventions and the licensing revenue that flows from them.
- Trademarks and brands – names and marks that can be licensed or sold.
- Design rights – protectable designs used commercially.
On divorce, both the underlying IP and the income it produces can be relevant to the settlement – see how assets are divided. Ongoing royalties can even feed into spousal maintenance discussions.
What a prenup can do
A prenup can record that intellectual property you created before the marriage – and the royalties flowing from it – is your separate property, and set out how rights or works created during the marriage are treated. Include your IP and royalty income in your financial disclosure, with a sensible note of value where you can (see how to value your assets – IP is notoriously hard to value precisely).
Drawing the line in time
The key question with IP is almost always timing, and there are usually two lines to draw:
- When the work was created – before the marriage (arguably separate) or during it (arguably matrimonial), which mirrors the matrimonial vs non-matrimonial distinction.
- When the income is received – royalties on pre-marital work may still arrive during the marriage, and a prenup can say how that income is treated.
Being explicit about both lines avoids arguments later over copyrights, patents and ongoing royalty streams. For income and works still to come, see should a prenup cover future assets? and prenups and future earnings.
Fairness and needs still apply
As ever, the court ensures fairness and that both partners' needs are met (see are prenups legally binding?), so a fair approach to royalty income is what holds up – particularly where those royalties are a major part of the family's income. Given the complexity of valuing and timing IP, creators with significant rights should take independent legal advice.
Intellectual property in a prenup: drawing the line
For intellectual property in a prenup, the key is timing. Record that IP created before the marriage – and the royalties flowing from it – is your separate property, and set out how rights or works created during the marriage are treated. Being clear about the line between before and during, and between income received before and after, avoids arguments later over copyrights, patents and ongoing royalty streams.
Why an IP clause carries weight: Radmacher
A prenup dealing with intellectual property has force because of Radmacher v Granatino (2010), in which the Supreme Court held that a court should give effect to a freely made, fair agreement unless it would be unfair to hold the parties to it. A prenup is not automatically binding – the court keeps its discretion under the Matrimonial Causes Act 1973, and needs come first, especially where royalties are a major part of the family income – but a fair, well-disclosed approach to IP, agreed with independent legal advice on both sides, is exactly what a court will now respect. Because IP is hard to value and income can arrive years after the work, a clause that sets clear principles is worth far more than one that tries to pin down a single number.
A worked example: an author’s back catalogue
Imagine a novelist marries having already published three successful books that still earn royalties. During the marriage they write two more. A sensible prenup might record that the copyright in the three earlier books – and the royalties they generate – is separate property, because the creative work predates the marriage, while treating the two books written during the marriage, and their income, as matrimonial. The tricky part is that royalties on the earlier books keep arriving during the marriage; the prenup should say whether that income is separate (as the fruit of pre-marital work) or shared (as income received during the marriage). Spelling that out is what prevents a drawn-out argument later.
The two lines that matter with IP
Almost every IP question comes down to two lines drawn in time. The first is when the work was created: rights in work made before the marriage have a stronger claim to be separate than work created during it. The second is when the income is received: royalties, licensing fees and advances on pre-marital work may still land during the marriage, and a prenup can say how that flow is treated. There is also a practical third dimension – ongoing income can feed into spousal maintenance discussions, so it is worth thinking about the capital asset and the income stream separately. For works and income still to come, see should a prenup cover future assets?
Recording and valuing IP in practice
IP is notoriously hard to value precisely – a song or patent might earn little for years and then a great deal, or vice versa. Rather than chase a false precision, record each significant right in your disclosure schedule with a short description, the date of creation or registration, and a sensible estimate of value or recent income, noting the date. Keep contracts, registration certificates and royalty statements. A review clause is especially useful for creators, because the value of a catalogue can change dramatically over time. For significant portfolios, see prenups for professionals and high-net-worth prenups.
Collaborations and jointly created work
Creative work is often collaborative, and that complicates the neat before-and-after line. A songwriter who co-writes with others, an author with a ghost-writer or co-author, a designer working within a studio – each may own only a share of the rights, governed by a collaboration or publishing contract that sits outside the marriage entirely. More delicate still is work created jointly with your spouse: if your husband or wife contributed lyrics, illustrations, editing or business input to work produced during the marriage, that work has a much stronger claim to be matrimonial, and trying to claim it entirely as your own is the kind of overreach a court will unpick (see when is a prenup unfair?). A realistic prenup protects the rights you genuinely created alone before the marriage, acknowledges shared contributions fairly, and defers to the underlying collaboration agreements for anything co-owned with third parties. Where a couple genuinely build a creative venture together, the points in prenups when a couple runs a business together also apply.
IP held through a company, and future works
Creators often assign their intellectual property to a company for tax or business reasons – a music-publishing company, a production firm, a design studio. When that happens, the IP is no longer a standalone personal asset but part of the value of the business, and it is disclosed and treated on that basis, alongside any shareholder agreement. A prenup should reflect how the rights are actually held rather than assuming they sit in your own name. The other forward-looking question is works and income still to come. You cannot value a book you have not written or a royalty stream that has not started, but a prenup can set the principle – for example, that rights in work created after a certain date, or income from future projects, are treated in a particular way – and a review clause lets you firm up the picture as a catalogue grows. For the wider approach to assets and income not yet in existence, see should a prenup cover future assets? and prenups and future earnings.
Intellectual property prenup FAQs
Does an IP clause carry weight after Radmacher?
Yes – where an IP clause is fair and backed by honest disclosure, a court treats it as strong evidence of your intentions, even though no prenup is automatically binding (see are prenups legally binding?).
What about royalties on pre-marital work received during the marriage?
A prenup can say whether that income is separate (fruit of pre-marital work) or shared – spelling it out avoids a dispute later.
How do I record IP I cannot value precisely?
Note a description, date and a sensible estimate or recent income in your disclosure, and keep the paperwork (see how to value your assets).
Are royalties counted in a divorce?
Yes – both the IP and the income it produces can be relevant (see how assets are divided).
What about work created during the marriage?
A prenup can set a fair approach (see should a prenup cover future assets?).
Is IP created before marriage protected?
A prenup can record it as separate property, along with the royalties it generates (see matrimonial vs non-matrimonial property).
How is intellectual property valued for a prenup?
Only approximately – IP is hard to value, so note a sensible estimate and keep records (see how to value your assets).
Can royalties affect spousal maintenance?
They can, as ongoing income (see spousal maintenance in a prenup).
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UK Prenup is not a law firm and does not provide legal advice. A prenuptial agreement in England & Wales is not automatically binding, and both partners should take independent legal advice before signing.