Small entity status is a 60% discount on most USPTO fees, claimed by ticking a box. There is no application, no evidence filed, and nobody checks at the time.
Which puts the entire burden on the person asserting it, and makes it one of the more common quiet errors in patent administration.
Micro entity status goes further — 80% off — with conditions strict enough that many who qualify at filing stop qualifying later without noticing.
What the discounts are worth
| Fee | Large | Small (40%) | Micro (20%) |
|---|---|---|---|
| Filing, search, examination | ~$2,000 | ~$800 | ~$400 |
| Issue fee | ~$1,200 | ~$480 | ~$240 |
| Maintenance, 3.5 years | $2,150 | $860 | $430 |
| Maintenance, 7.5 years | $4,040 | $1,616 | $808 |
| Maintenance, 11.5 years | $8,280 | $3,312 | $1,656 |
| Maintenance total | $14,470 | $5,788 | $2,894 |
The saving across a patent's life is $8,682 at small entity and $11,576 at micro. On a portfolio of twenty patents that is a six-figure difference.
It changes the renewal decision, not just the invoice. A third maintenance fee of $1,656 supports keeping a marginal patent that $8,280 would not. Entity status therefore has a direct effect on which patents survive.
How status is claimed
By assertion, with no evidence filed and no verification.
| Step | Detail |
|---|---|
| How | A statement or checkbox when paying a fee |
| Evidence filed | None |
| USPTO verification | None at the time |
| When it takes effect | The payment it accompanies |
| How long it lasts | Until circumstances change — not until the patent expires |
| Who is responsible | The person asserting it |
The absence of checking is the whole problem. Nothing rejects an incorrect assertion, so the error persists silently through every subsequent payment until a transaction or a litigation exposes it.
Micro entity status requires a separate certification with its own form, and it must be re-certified rather than assumed to carry forward. An applicant who qualified as micro at filing and says nothing at the first maintenance fee has not re-asserted anything.
Document the basis when you assert it. A short internal note recording headcount, licences and income at the date of payment is the evidence that establishes good faith years later, and it takes minutes.
Who qualifies as a small entity
Three routes, under 37 CFR 1.27.
| Route | Test |
|---|---|
| Individual inventor | Has not assigned, licensed or agreed to transfer rights to a non-qualifying party |
| Small business concern | No more than 500 employees, counting affiliates |
| Non-profit | Universities, and organisations qualifying under IRC 501(c)(3) or equivalent |
The 500-employee count includes affiliates. A small subsidiary of a large group does not qualify. Affiliation turns on control, so majority ownership, common management or contractual control all pull the parent's headcount in.
Employees are counted as an average over the preceding fiscal year, including part-time and temporary staff.
The transfer restriction is the one that catches people. If you have assigned or licensed rights to anyone who would not themselves qualify, entitlement ends — even though you are still small.
| Scenario | Small entity? |
|---|---|
| Solo inventor, no transfers | Yes |
| Startup, 40 employees, no licences | Yes |
| Startup that licensed to a 5,000-employee company | No |
| University, unlicensed | Yes |
| Subsidiary of a large group | No |
| 480 employees, growing | Yes — recheck before every fee |
What the discount applies to
Most but not all USPTO fees, and knowing which matters when budgeting.
| Fee | Discounted? |
|---|---|
| Filing, search and examination | Yes |
| Excess claim and page fees | Yes |
| Issue fee | Yes |
| Maintenance fees | Yes |
| Extension of time fees | Yes |
| Appeal fees | Yes |
| Recording an assignment | Generally not discounted |
| Attorney and agent fees | No — private charges, unaffected |
Attorney fees are the largest cost of obtaining a patent and are untouched by entity status. A micro entity still pays full drafting and prosecution charges, so the 80% discount applies to a minority of the total spend before grant.
After grant the balance flips. Maintenance fees are almost the entire ongoing cost, and there entity status determines nearly everything — $2,894 against $14,470 across a patent's life.
Which is why status matters most for portfolio decisions, not filing decisions. The discount does not make patents much cheaper to get; it makes them substantially cheaper to keep.
Micro entity: four conditions
All four must hold, under 37 CFR 1.29.
| Condition | Detail |
|---|---|
| 1. Small entity | Must qualify first |
| 2. Application count | Named on no more than four previously filed US non-provisional applications |
| 3. Income | Gross income below three times median household income for the preceding year |
| 4. No transfer | Rights not assigned or licensed to anyone exceeding the income limit |
The application count excludes more than people expect.
| Excluded from the count | Why |
|---|---|
| Provisional applications | Not non-provisionals |
| PCT applications not entering US national stage | Never became US applications |
| Applications assigned to a former employer as an employment condition | Statutory exclusion |
| Foreign applications | Not US |
Provisionals not counting is the most useful exclusion. An inventor with six provisionals and two non-provisionals is still within the limit.
The income test applies to each inventor and each assignee separately. One inventor over the threshold disqualifies the application, however many others qualify.
Universities have a separate route. An applicant whose employer is an institution of higher education, or who has assigned to one, can qualify without meeting the income test.
Status must be true at every payment
This is the rule that produces most errors. Entity status is not fixed at filing. It must be accurate each time a fee is paid.
| Event between fees | Effect |
|---|---|
| Company grows past 500 employees | Status ends |
| Licence granted to a large company | Status ends |
| Patent assigned to a large entity | Status ends |
| Inventor's income rises above the micro threshold | Micro ends; small may continue |
| Company shrinks below 500 | Status can be reclaimed |
| Licence to a large company terminates | Can be reclaimed |
There are three or four payment points across a patent's life — issue fee plus three maintenance fees — and the gaps between them are years long. A startup that qualified at filing may have raised two rounds and licensed to a major customer by the second maintenance fee.
Nobody prompts the recheck. The USPTO does not verify at payment, so the error persists silently until it surfaces in diligence or litigation.
Worked example: a startup across a patent's life
A company files as a small entity in 2018 with 30 employees.
| Year | Event | Correct status | What they paid |
|---|---|---|---|
| 2018 | Filed, 30 employees | Small | Small ✓ |
| 2021 | Patent grants; 90 employees | Small | Small ✓ |
| 2023 | Exclusive licence to a 9,000-employee customer | Large | — |
| 2024 | First maintenance fee due | Large — $2,150 | Small — $860 ✗ |
| 2026 | Acquired by a public company | Large | — |
| 2028 | Second maintenance fee due | Large — $4,040 | ? |
The error started at the 2023 licence, not at any fee payment. The licence to a non-qualifying party ended entitlement immediately, and the 2024 payment was the first one made on a wrong basis.
Underpayment: $1,290 on that fee. Trivially small against the consequence.
| Outcome | Depends on |
|---|---|
| Good faith error | Correctable by paying the deficiency |
| Fraud on the Office | Patent may be unenforceable |
Good faith is the dividing line, and it is assessed on the evidence available years later. A company that documented its basis for the claim at the time is in a far stronger position than one reconstructing its reasoning in a deposition.
The fix is a diary entry, not a legal opinion. Reviewing entity status is a short exercise attached to each fee payment, and it is the cheapest form of insurance available in patent administration.
Correcting an error
| Situation | Route |
|---|---|
| Underpaid in good faith | Pay the deficiency with an itemised statement |
| Overpaid (claimed large when entitled to small) | Refund available in limited circumstances, with time limits |
| Uncertain whether entitlement continues | Pay the large entity rate — never a violation |
| Deliberate misrepresentation | Serious; take advice |
Paying the higher rate is always safe. It costs money and creates no risk, which makes it the right choice whenever entitlement is genuinely unclear.
Refunds for overpayment are time-limited, so a company that discovers it was entitled to a discount should act promptly rather than at the next fee.
Entity status and portfolio decisions
The discount changes which patents are worth keeping.
| Ipiry Patent Survival Curve v1.0 | Rate |
|---|---|
| Survive the 3.5-year fee (2022 cohort) | 85.8% |
| Survive the 7.5-year fee (2018 cohort) | 64.6% |
| Reach full term (2014 cohort) | 41.4% |
| Abandoned before full term | 58.6% |
| Lost at the third fee | 23.2 points |
Computed from 27,273,654 USPTO maintenance fee records covering 8,262,336 US utility patents. See the patent survival curve.
The third fee is where most abandonment happens, and it is where the discount matters most — $8,280 against $1,656 is the difference between a hard decision and an easy one.
Which cuts both ways. A micro entity can afford to keep marginal patents that a large entity would prune, and a company that loses small entity status mid-portfolio faces a step change in renewal costs it may not have budgeted for.
Model the change before it happens. A startup approaching 500 employees, or negotiating a licence with a large customer, should price the loss of entity status into its patent budget. See patent maintenance fees for the full schedule and how much does a patent cost for lifetime totals at each entity size.
Small entity status: the checklist
- Confirm which route applies — individual inventor, business under 500 employees including affiliates, or non-profit.
- Count affiliates in the employee number. Control-based affiliation pulls in a parent or commonly controlled entities.
- Check for transfers. Any assignment or licence to a non-qualifying party ends entitlement, whatever your own size.
- Test all four micro entity conditions if claiming the 80% discount, and remember provisionals do not count toward the four-application limit.
- Apply the income test to every inventor and assignee, not just the lead applicant.
- Recheck status before every single fee payment, not once at filing.
- Document the basis at the time you assert it. Good faith is the dividing line if an error surfaces later, and it is proved with contemporaneous records.
- Pay the large entity rate whenever entitlement is unclear. Overpaying is never a violation.
- Diarise a status review alongside each maintenance fee deadline, so the two decisions are made together.
- Budget for losing status if you are approaching 500 employees or negotiating a licence with a large company — renewal costs jump immediately.