Copyright law in the United States is often described as "complex," but the complexity tends to cluster around a single question that clients ask constantly: Is this work still protected, or can I use it freely?
The answer depends almost entirely on when the work was created or first published — and whether the owner complied with certain formalities that no longer exist but whose absence still echoes through millions of older works.
This guide organizes the rules into four categories, explains the reasoning behind each, and highlights the traps that trip up even experienced practitioners.
The Foundational Framework
Before diving into specific rules, two structural principles govern all of U.S. copyright duration:
1. Terms run through the end of the calendar year. Under 17 U.S.C. § 305, all copyright terms expire on December 31 of the year in which they would otherwise expire. A work published in 1950 whose 95-year term runs out in 2045 is actually protected through December 31, 2045. This matters for transactional work, licensing agreements, and clearance decisions made near year-end.
2. Works made before 1978 follow different rules than those made after. The Copyright Act of 1976, which took effect January 1, 1978, overhauled the duration rules entirely. Works already under protection kept a modified version of the old system; new works got the modern life-plus-70 framework.
Category 1: Works Published Before January 1, 1931
Rule: Public domain.
All works published in the United States before January 1, 1931, are in the public domain. Period. The maximum copyright term of 95 years (28-year original term + 67-year renewal) has run out for any work published before 1931 as of 2026.
This is the clearest category. The Smithsonian's collections, early jazz recordings, first-edition novels from the 1920s — if published before 1931, they're free to use, reproduce, adapt, or distribute in the U.S. without permission. (Note: foreign copyright terms may differ, and unpublished works follow separate rules.)
Category 2: Works Published 1931–1977
This is where most of the complexity lives, and where most clearance mistakes happen.
Published 1931–1963: Mandatory Renewal Required
Under the Copyright Act of 1909, federal copyright protection lasted for an initial 28-year term. To receive a second term of protection, the copyright owner had to register a renewal claim in the 28th year of the first term. Failure to renew meant the work fell immediately into the public domain.
Congress extended the renewal term repeatedly over the years — first to 47 years, then to 67 years under the Copyright Term Extension Act of 1998 (the "Sonny Bono Act"). The result: a work published in 1940 that was properly renewed has a total term of 95 years (28 + 67) and is protected through December 31, 2035.
But here is the trap. Renewal was not automatic. Copyright Office records show that the renewal rate for works published in the 1950s was well below 50% in many categories. Novels, films, sheet music, and photographs from this era are frequently in the public domain — not because the term has run, but because the owner failed to renew.
Determining renewal status requires checking Copyright Office renewal records, available through the office's online catalog (for renewals after 1977) or through digitized records maintained by the Internet Archive (for earlier renewals). Do not assume a work from 1945 is protected just because it looks like it might be.
Published 1964–1977: Automatic Renewal
Congress eliminated the renewal requirement in 1992. Works published between January 1, 1964, and December 31, 1977, received automatic renewal regardless of whether the owner filed with the Copyright Office. Their copyright term is still divided into a 28-year first term and a 67-year renewal term — but the renewal vests automatically.
A work published in 1970 is protected for 95 years, through December 31, 2065. No action was required.
The copyright owner could still file a voluntary renewal registration, which carries evidentiary benefits in litigation, but failure to renew no longer forfeits protection.
Category 3: Works Created On or After January 1, 1978
The 1976 Copyright Act abandoned the dual-term system entirely for new works. The modern framework applies to anything created on or after January 1, 1978, and depends on authorship type.
Individual Authors: Life + 70 Years
For works by a single identified human author, the copyright term is the author's life plus 70 years after their death. 17 U.S.C. § 302(a). The 70-year period runs from December 31 of the year in which the author died.
A novelist who dies in 2024 will have their copyrights expire December 31, 2094. Their publisher holds a license that runs until then; after that, the works belong to the world.
Joint Works: Life of Last Surviving Author + 70 Years
For works prepared by two or more authors with the intention that their contributions be merged into a single unitary whole, the term is 70 years after the death of the last surviving author. 17 U.S.C. § 302(b).
Co-authored works — joint research papers, co-written screenplays, collaborative musical compositions — thus have terms determined by the longest-lived contributor. This can matter enormously for licensing and publishing decisions when one co-author is significantly younger than the others.
Works Made for Hire, Anonymous Works, and Pseudonymous Works: 95/120 Rule
Works made for hire, anonymous works (published without identifying an author), and pseudonymous works (published under a fictitious name) use a different formula. 17 U.S.C. § 302(c):
The copyright term is 95 years from the date of first publication, or 120 years from the date of creation, whichever expires first.
This rule applies to:
- Works made for hire: Any work created by an employee within the scope of employment, or certain commissioned works in a statutory category covered by a written work-for-hire agreement.
- Anonymous works: Works where the author's identity is not disclosed in the Copyright Office records.
- Pseudonymous works: Works published under a fictitious name, where the author's true identity is not disclosed in Copyright Office records.
The identity exception: If the author's identity is later revealed in Copyright Office records, the term reverts to the standard life-plus-70 calculation. Copyright owners of pseudonymous works therefore have a strategic choice: maintain anonymity and get the 95/120 rule, or disclose identity and (if the author is young) potentially get a longer or shorter term depending on the author's lifespan.
Category 4: Unpublished Works Created Before 1978
Unpublished works that were never federally registered or published before January 1, 1978 — think manuscripts stored in attics, private correspondence, unreleased recordings — received special treatment under the 1976 Act's transitional provisions. 17 U.S.C. § 303(a):
- These works receive the standard life-plus-70 term under the 1976 Act, but no less than through December 31, 2002.
- If such a work was published before December 31, 2002, the term is extended to at least December 31, 2047.
The December 31, 2047 extension was designed to incentivize publication of these works — to bring them into the public sphere — by giving owners more than 45 additional years of protection for doing so.
The Work-for-Hire Doctrine: Employer vs. Employee vs. Contractor
Because the work-for-hire category affects duration so significantly (95 vs. potentially 120+ years for life-plus-70 works), it deserves careful attention.
Under 17 U.S.C. § 101, a work is "made for hire" if it is:
- Prepared by an employee within the scope of their employment, or
- Specially ordered or commissioned — but only if (a) it falls within one of nine specific statutory categories AND (b) the parties expressly agree in a written instrument signed by them that the work shall be considered a work made for hire.
The nine statutory categories for commissioned works are: contributions to collective works, parts of motion pictures or other audiovisual works, translations, supplementary works, compilations, instructional texts, tests, answer material for tests, and atlases.
Software, music, and novels written by independent contractors are generally not works made for hire — even if the contract says otherwise — unless the work falls within one of the nine categories. This has enormous implications for copyright ownership and duration. Misclassifying a contractor's work as work-for-hire in a contract does not make it so; courts look to the economic realities of the relationship.
Practical Clearance Checklist
When evaluating whether a work can be used without permission, work through this sequence:
- Is the work published? (Unpublished works have different rules — see Category 4.)
- When was it first published? (Determines which duration framework applies.)
- Was it published before 1931? If yes → public domain in the U.S.
- Was it published 1931–1963? If yes → check Copyright Office renewal records.
- Was it published 1964–1977? If yes → automatically renewed; 95-year term applies.
- Was it published after 1977? If yes → apply the 1976 Act framework based on authorship type.
- Is the author known and dead? If yes → calculate life + 70.
- Is it a work for hire, anonymous, or pseudonymous? If yes → apply 95/120 rule.
When in doubt — especially for commercial use, licensing, or republication — consult a copyright attorney. The cost of a clearance opinion is almost always lower than the cost of defending a copyright infringement claim.
Interactive Copyright Duration Calculator
Use the tool below to calculate whether a specific work is still under copyright or has entered the public domain. Answer a few questions about the work's publication date, authorship type, and renewal status to get a result grounded in 17 U.S.C. §§ 302–304 and Copyright Office Circular 15A.
Copyright Duration Analysis
When was this work first protected by copyright?
Different rules apply depending on when the work was created or first published. Works created on or after January 1, 1978 are governed by the Copyright Act of 1976.
Frequently Asked Questions
Does copyright duration apply the same way internationally?
No. The U.S. rules described above apply only to U.S. copyright law. The Berne Convention establishes a minimum term of life plus 50 years in member countries, but most major jurisdictions — including the European Union, the United Kingdom, and Australia — use life plus 70 years. However, the specific formalities rules (renewal requirements, etc.) vary significantly by country. A work that is in the public domain in the U.S. may still be under copyright in the EU, and vice versa.
Is a copyright notice required for protection?
Not for works published after March 1, 1989, when the U.S. joined the Berne Convention. Before that date, notice was generally required for works published in the U.S., and its absence could cause the work to fall into the public domain. This is one reason why works published between 1978 and 1989 require careful analysis.
Does registering copyright extend the term?
No. Copyright registration does not affect the duration of protection. However, registration within five years of publication creates a rebuttable presumption of the copyright's validity. More importantly, registration before infringement occurs (or within three months of first publication) is required to obtain statutory damages and attorney's fees in an infringement lawsuit — creating a powerful practical incentive to register promptly.
Can I use a work that's in the public domain in the U.S.?
Generally yes, but with important caveats. First, a derivative work built on public domain material may itself be under copyright — you can use the underlying material, but you cannot copy the derivative expression added by the new author. Second, factual content (such as historical photographs and maps) may be in the public domain while a particular reproduction or collection is separately protected. Third, some materials involve moral rights under foreign law that may persist even after copyright expires.
What about copyright termination — is that different from expiration?
Yes, significantly. Expiration is the natural end of the copyright term, after which the work enters the public domain forever. Termination is a statutory right under 17 U.S.C. §§ 203 and 304 that allows authors or their heirs to recapture rights previously transferred — even if the contract purported to make the transfer permanent. Termination rights apply only to grants made by authors (not employers under work-for-hire), must be exercised within specific windows, and require formal written notice. For artists who signed away rights in the 1970s through early 1990s, termination windows are now opening. See our Copyright Recapture Rights guide for a full analysis, and use our Copyright Termination Wizard to analyze your specific situation.
This article is for informational purposes only and does not constitute legal advice. Copyright analysis is fact-specific — consult a copyright attorney for guidance on your particular situation.
Shareholder · Nashville
Business and intellectual property counsel to founders, creative companies, and technology businesses.
This article is general information about the law as of its publication date, not legal advice, and reading it does not create an attorney-client relationship. The law changes; consult counsel about your specific situation.