Patent filing cost calculator

What a utility patent actually costs, start to finish

A U.S. utility patent takes 2–4 years to issue and stays in force for 20 years from the filing date. The total cost has three phases: drafting and filing (up-front), prosecution (office-action responses during examination), and maintenance (three fees during the life of the patent). Budget somewhere between $10,000 and $40,000 over the full life for a typical single-applicant utility patent, heavily depending on complexity and entity size.

Phase 1: drafting and filing

This is the biggest single line item. A registered patent attorney or agent writes the specification, claims, and drawings — typically 15–40 pages of technical and legal prose, plus engineering drawings. Flat fees for drafting range widely: $5,000–$8,000 for a simple mechanical invention, $8,000–$15,000 for most software and electronics, $15,000–$30,000+ for biotech and complex hardware.

USPTO filing fees for a utility patent in 2024: $320 basic filing + $700 search + $800 examination = $1,820 at large-entity rates. Small-entity cuts that to $910; micro-entity to $455. Additional claims above 20 total or above 3 independent are extra ($100 per excess claim at large entity, prorated down).

Phase 2: prosecution

After filing, the application sits in the examiner's queue for 12–24 months before first action. When the examiner finally reads it, they almost always issue a rejection — citing prior art, claim indefiniteness, or subject-matter ineligibility. Your attorney responds with amendments and arguments. The average patent gets 1.8 office actions before allowance or abandonment. At $450/hr and 25 hours per response, each office action adds roughly $11,000. Complex cases see 3+ office actions, RCEs (request for continued examination), and appeals.

If and when the examiner allows the claims, you pay the USPTO issue fee ($1,200 at large entity, $600 small, $300 micro).

Phase 3: maintenance

To keep a utility patent in force for the full 20 years, you pay three USPTO maintenance fees:

• 3.5-year maintenance: $2,000 (large) / $1,000 (small) / $500 (micro)
• 7.5-year maintenance: $3,760 (large) / $1,880 / $940
• 11.5-year maintenance: $7,700 (large) / $3,850 / $1,925

Miss a maintenance deadline and the patent goes abandoned. There's a 6-month grace period with surcharge; after that, revival requires showing the delay was unintentional and paying another fee. A lot of patent holders let maintenance lapse when the patent turns out to have no commercial value — this is completely normal and is part of the patent economics.

What drives cost up

• Multiple inventions — the USPTO can require restriction (splitting into multiple applications), each with its own full fee structure.
• Foreign filing — a PCT application for international protection adds $3,000–$5,000 at filing, then $4,000–$10,000 per country when you enter national phase.
• Appeals — a final rejection can be appealed to the Patent Trial and Appeal Board. Appeal brief + fees can run $10,000–$25,000.
• Continuations — keeping a patent family alive to pursue different claim scope means filing continuations (each is a new full filing fee).

Design and plant patents

This calculator estimates utility patents (the most common kind). Design patents — protecting ornamental appearance — have lower fees, shorter 15-year terms, no maintenance fees, and typically issue in 1–2 years for $2,000–$5,000 all-in. Plant patents are rare and have their own fee schedule.