A granted U.S. patent is not paid for once. To keep a utility patent in force for its full term, the owner must pay three maintenance fees, and at large-entity rates they total $14,470 over the life of the patent: $2,150 due at 3.5 years, $4,040 at 7.5 years, and $8,280 at 11.5 years. Those are the amounts on the USPTO fee schedule effective January 19, 2025. Miss one, and the patent expires. This is the recurring cost most inventors forget when they budget for a patent.
Here is what maintenance fees are, what they cost across all three entity sizes, and why they exist.
The three payment windows
Maintenance fees come due at three points measured from the patent’s grant date, not its filing date. The USPTO sets them as follows.
- 3.5 years: $2,150 large entity, $860 small, $430 micro.
- 7.5 years: $4,040 large, $1,616 small, $808 micro.
- 11.5 years: $8,280 large, $3,312 small, $1,656 micro.
Notice the escalation. Each window costs roughly double the one before. The system is designed so that holding a patent gets more expensive the longer you keep it. The figures sit on the USPTO fee schedule, which the agency revises periodically; the maintenance fees rose about 7.5 percent in the January 2025 update.
The lifetime total, by entity size
Stacking the three payments gives the true carrying cost of a patent across its 20-year term:
- Large entity: $2,150 + $4,040 + $8,280 = $14,470.
- Small entity: $860 + $1,616 + $3,312 = $5,788.
- Micro entity: $430 + $808 + $1,656 = $2,894.
For a micro-entity individual inventor, keeping a patent alive for its full term costs just under $2,900 in maintenance fees, on top of whatever was spent to obtain it. For a large corporation, it is more than $14,000 per patent, which is part of why companies actively prune portfolios.
Why the fees escalate
The rising structure is deliberate policy, not arbitrary. By making later years more expensive, the USPTO pushes owners to abandon patents they no longer value. When an owner stops paying, the patent lapses into the public domain, where anyone can use the invention. The escalating fee is a quiet mechanism for clearing out patents that are not worth maintaining, so the active patent pool reflects what owners actually consider valuable.
This is why a large share of patents never reach the 11.5-year payment. Owners let them lapse at 3.5 or 7.5 years once it is clear the invention is not generating enough value to justify the next fee. The decision to pay is a recurring judgment about whether the patent still earns its keep.
The grace period and the cliff
Each fee has a six-month grace period after its due date, during which the owner can still pay by adding a surcharge ($540 at large-entity rates). After that, the patent expires for non-payment. Reviving a patent that lapsed unintentionally is possible through a petition, but it carries its own fees ($2,260 or $3,000 depending on the delay) and is not guaranteed. The cleaner path is simply to calendar the three dates and pay on time.
Entity status matters here too. The same 60 percent small-entity and 80 percent micro-entity discounts that apply to filing fees apply to maintenance fees. An inventor who qualified as a micro entity at filing should confirm status is still accurate at each maintenance payment, because status can change and the rules require checking before each micro-entity payment.
What this means for budgeting
The practical lesson is that a patent is a subscription, not a purchase. The cost of obtaining one, government fees plus drafting, is the entry price. The maintenance schedule is the ongoing cost of ownership, and it grows over time.
An inventor should decide before filing whether a given invention is likely to justify a decade-plus of maintenance payments, or whether it is more realistic to license or sell the patent so a partner with a commercial interest carries those costs. That is a strategic question, not a paperwork one.
Firms that take inventions toward a license deal factor maintenance fees into that calculus. Enhance Innovations, a Champlin, Minnesota product development company operating since 2010, brings design, engineering, marketing, and licensing representation together so an inventor can weigh whether to hold a patent and pay its maintenance fees or move it to a manufacturing partner who will. The fee schedule is fixed and public. The decision of whether a patent is worth its recurring cost is where the real planning happens.
This article is for general information and is not legal or financial advice. Confirm current maintenance fee amounts and due dates directly with the USPTO.