Micro entity status is a designation under 37 CFR 1.29 that lets qualifying patent applicants pay 80 percent less than standard fees at the U.S. Patent and Trademark Office on filing, examination, issue, and maintenance charges.1United States Patent and Trademark Office. Micro Entity Status You qualify through one of two paths: a gross income test tied to Census median household income, or a qualifying connection to a college or university. Before either path is available, you have to clear a prerequisite that catches many applicants off guard.
Small Entity Status Comes First
Every applicant, inventor, and party with an ownership interest in the application must independently qualify as a small entity under 37 CFR 1.27 before micro entity status is even on the table.1United States Patent and Trademark Office. Micro Entity Status Small entity covers individual inventors who haven’t transferred rights to a non-qualifying organization, small business concerns meeting SBA size standards, and nonprofits including universities and 501(c)(3) entities.2eCFR. 37 CFR 1.27 – Definition of Small Entities
The practical effect: if you’ve assigned your patent rights to a large corporation, or if your employment contract obligates you to assign inventions to one, you fail the small entity test and cannot claim micro entity status no matter what your personal income looks like. Micro entity is a subset of small entity, not a parallel track.
Qualifying Through the Gross Income Path
The gross income route has three requirements on top of the small entity prerequisite. Every inventor and applicant on the filing has to satisfy all three individually.
No More Than Four Prior Applications
No applicant or inventor can have been named on more than four previously filed U.S. patent applications.3eCFR. 37 CFR 1.29 – Micro Entity Status The count sweeps in utility, design, and plant applications, along with continuations, divisionals, reissues, PCT national stage filings, and international design applications designating the United States.1United States Patent and Trademark Office. Micro Entity Status Whether the earlier applications are pending, patented, or abandoned makes no difference. They all count.
Three types are excluded: provisional applications, applications filed in a foreign country, and PCT international applications where the U.S. basic national fee was never paid.3eCFR. 37 CFR 1.29 – Micro Entity Status The common trap is treating continuations and divisionals as extensions of the original. They aren’t. One original utility application plus three continuations puts you at four already.
Gross Income Below the Threshold
Each applicant and inventor must have earned a gross income in the preceding calendar year at or below three times the median household income most recently reported by the Census Bureau.3eCFR. 37 CFR 1.29 – Micro Entity Status The Census Bureau reported median household income of $83,730 for 2024, which puts the current threshold at $251,190.4U.S. Census Bureau. Income in the United States: 2024
Read “gross income” carefully. The regulation ties it to 26 U.S.C. 61(a), not to adjusted gross income.3eCFR. 37 CFR 1.29 – Micro Entity Status Gross income is the broader figure before deductions for retirement contributions, student loan interest, business expenses, and the rest. If you’re anywhere near the ceiling, don’t measure yourself against the AGI on your tax return. Use the larger number.
No Assignment to a High-Earning Entity
Eligibility also fails if any applicant or inventor has transferred, or is obligated to transfer, an ownership interest or license in the application to an entity whose gross income exceeded the same $251,190 threshold in the preceding calendar year.3eCFR. 37 CFR 1.29 – Micro Entity Status An employment contract requiring you to assign inventions to a large employer triggers this rule even when your own income is well below the cap. On a joint application, each named inventor must independently clear all three of these requirements.
Qualifying Through the Higher Education Path
Applicants who can’t meet the gross income requirements have a second route if they have a qualifying tie to a college or university. Small entity status is still required, but the income ceiling and the four-application cap do not apply on this path.3eCFR. 37 CFR 1.29 – Micro Entity Status
You qualify in one of two ways. The first is when your primary employer, meaning the source of the majority of your income, is an institution of higher education as defined by the Higher Education Act of 1965, which broadly covers accredited public or nonprofit colleges and universities granting bachelor’s degrees or higher. The second is when you have assigned or are obligated to assign all ownership rights in the application to such an institution.3eCFR. 37 CFR 1.29 – Micro Entity Status The second route matters mostly for graduate students and adjunct researchers whose university will end up owning the patent.
On a joint application where some inventors qualify by income and others qualify by their university connection, you can file both certification forms together. The USPTO treats a combined filing of Forms PTO/SB/15A and PTO/SB/15B as a representation that any inventor not qualifying on one basis qualifies on the other.5United States Patent and Trademark Office. Certification of Micro Entity Status (Education Basis)
What the Discount Is Worth
The 80 percent reduction applies to most USPTO fees. Current micro entity rates for key steps in a utility patent include a $70 basic filing fee, a $154 search fee, a $176 examination fee, and a $258 issue fee. Maintenance fees, required to keep a granted patent in force, are also discounted: $430 at 3.5 years, $808 at 7.5 years, and $1,656 at 11.5 years.6USPTO. USPTO Fee Schedule
Filing, search, and examination together come to $400 at the micro entity rate. Those same three fees run roughly $2,000 at undiscounted large entity rates. Across the full 20-year term of a patent, cumulative savings from micro entity status can exceed $6,000.
How to Certify Your Status
The USPTO provides two standardized certification forms. Form PTO/SB/15A is for the gross income basis. Form PTO/SB/15B is for the higher education basis.1United States Patent and Trademark Office. Micro Entity Status Both are downloadable from the USPTO patent forms page.
Not everyone connected to the application can sign. Authorized signatories are limited to a registered patent attorney or agent of record, a sole inventor who is listed as the applicant, or all joint inventors when the inventors are collectively the applicant.7United States Patent and Trademark Office. Who May Sign Forms PTO/SB/15A and 15B An officer of an assignee corporation cannot sign, even when the corporation owns the application. Joint inventors each sign a separate copy of the form.
File the certification through Patent Center along with the initial application or a subsequent filing. Timing is strict. The certification has to be on file before or at the same time as the first fee you pay at the micro entity rate.1United States Patent and Trademark Office. Micro Entity Status Pay at the discounted rate before the certification is in the record and you have a fee deficiency.
The USPTO does not require you to submit income proof or a list of prior applications with the form. You are certifying these facts under penalty of law, though, so keep the documentation ready. Hold onto your federal tax returns and maintain a running list of every patent application filed under your name. Those records are your defense if the office ever questions your status.
Rechecking Your Status Every Time You Pay
Micro entity status is not a one-time determination. You have to re-evaluate whether you still qualify every time you pay a fee, including maintenance fees years after the patent issues.1United States Patent and Trademark Office. Micro Entity Status Income can cross the threshold. A fifth application can be filed. Rights can move to an entity that doesn’t qualify. Any of those changes ends your eligibility.
When status no longer applies, file a notification of loss using Form PTO/SB/460 before or at the time of the next fee payment. You don’t need to re-file the certification if nothing has changed. But if something has changed and you keep paying at the micro rate, you’ve underpaid and owe the difference. The notification form asks you to itemize every fee paid at the wrong rate and pay the shortfall between the micro rate and the correct one. A good-faith error is resolved by paying the deficiency.8United States Patent and Trademark Office. Notification of Loss of Micro Entity Status
Penalties for a False Certification
Claiming micro entity status you don’t qualify for has real financial consequences. Under 35 U.S.C. 123(f), the USPTO will impose a fine of at least three times the amount underpaid as a result of the false certification.9Office of the Law Revision Counsel. 35 USC 123 – Micro Entity Defined The only defense is a showing that the certification was made in good faith.
The USPTO announced in June 2025 that it would begin actively enforcing these penalties. Enforcement starts with a combined notice of payment deficiency and order to show cause, giving the applicant or patentee a chance to respond before a final determination.10United States Patent and Trademark Office. USPTO to Assess Statutory Penalties for False Assertions or Certifications of Small and Micro Entity Status For an applicant who saved a few hundred dollars on a filing fee, a 3x penalty turns that savings into a net loss quickly. If your eligibility is uncertain, paying at the small entity rate, a 60 percent discount rather than 80 percent, removes the risk.