Provisional Patent or Nonprovisional Patent? What's the Difference, and Which Should You File First?

Almost every inventor who contacts us asks some version of the same question: should I file a provisional patent application or a nonprovisional patent application? The two are not competing options so much as two steps in a single process. One holds your place in line. The other is the application that can actually become a patent.

This guide explains what each application is, how the 12-month provisional window works, what a provisional should contain to be worth filing, how the costs compare, and when to skip the provisional and file a nonprovisional directly.

The short answer

A provisional patent application is a low-cost, informal filing that establishes an official filing date with the US Patent and Trademark Office. It is not examined, it is not published, and it expires automatically 12 months after it is filed.

A nonprovisional patent application is the real thing. It must include formal claims, an oath or declaration from the inventors, and the full filing, search, and examination fees. A patent examiner reviews it, and if the claims are allowed, it issues as a US patent. When a nonprovisional is filed within 12 months of a provisional and claims its benefit, it is treated as if it had been filed on the provisional's date for everything the provisional described.

In other words, there is no such thing as a "provisional patent." There are only provisional applications, and the only way to get a patent from one is to follow it with a nonprovisional.

What a provisional patent application is

Congress created the provisional application in 1995, and it is governed by 35 U.S.C. § 111(b). The rules are deliberately light:

• It requires a specification and drawings that describe the invention in enough detail for a person skilled in the field to make and use it.
• It does not require claims, an inventor's oath or declaration, or an information disclosure statement. Many provisionals are filed with no claims at all.
• It is never examined and never published. No examiner reads it and no office action is issued. The USPTO simply records the filing date and stores the documents.
• It expires after 12 months. A provisional is automatically abandoned 12 months after filing and cannot be extended or renewed.
• It does not count against your patent term. The 20-year term runs from the nonprovisional filing date, so the provisional year is free time at the front of the patent's life.

Once a provisional is on file, you can legitimately mark your product "patent pending," which carries real deterrent value with competitors and real credibility with investors and customers.

What a nonprovisional patent application is

A nonprovisional application, often called a utility application, is the complete package the USPTO examines. It must include a specification with a written description, an abstract, and at least one claim defining the legal boundary of the invention; formal drawings; an oath or declaration signed by each inventor; and the filing, search, and examination fees. Most applications wait a year or more for a first office action and receive at least one rejection before allowance. The application is published 18 months after its earliest filing date unless you request nonpublication, and if the claims are allowed and the issue fee is paid, it becomes an issued US patent.

Provisional vs. nonprovisional at a glance

Why the system works this way: file first, then build

Since the America Invents Act took full effect in 2013, the United States has been a first-inventor-to-file country. If two people independently invent the same thing, the patent goes to the one who filed first, and nearly any public disclosure, sale, or use of your invention before your filing date becomes prior art against you. The US gives inventors a one-year grace period for their own disclosures. Most other countries give none.

That pressure to file early collides with the reality of product development. On the day you have a good idea, you rarely know the final shape of the product or whether it will even work. The provisional application resolves that tension. The intended workflow looks like this:

1. File a provisional as soon as the idea is concrete and before you show it to anyone outside a confidentiality agreement. Your filing date is now locked in.
2. Spend the next 12 months building. Prototype, test, iterate, talk to customers, raise money, and even make sales, all under "patent pending."
3. File the nonprovisional before the year ends, with claims written around the product that actually emerged, and with the provisional's filing date for everything the provisional described.

Done well, this gets you the early date a first-to-file system demands and the mature, well-targeted claims a valuable patent needs, without paying for both up front. The same 12-month clock governs foreign filing: under the Paris Convention, a PCT or direct foreign application filed within a year of the provisional can claim its date too.

What makes a provisional application worth filing

Because a provisional needs no claims and is never examined, it is tempting to treat it as a formality: write a few pages, attach some photos, pay $65, and move on. That is the most common provisional mistake, and it can quietly destroy the value of the filing.

A provisional gives your later claims its filing date only to the extent it supports them. The written description requirement of 35 U.S.C. § 112(a) applies to provisionals, and courts enforce it. In New Railhead Manufacturing v. Vermeer Manufacturing (2002), the Federal Circuit held a patent invalid because the provisional did not describe the angled drill-bit feature the patent eventually claimed. The claims got the later date instead, and the inventor's own sales during the provisional year became invalidating prior art.

The lesson is that a good provisional is expansive, not minimal. It should describe:

• Every embodiment you can think of, not just the one you plan to build first: different shapes, materials, and arrangements of parts.
• Alternatives and substitutes for each component, so a claim written around a different variation a year later is still supported.
• Ranges, not single values, for dimensions, temperatures, concentrations, and other parameters.
• Plenty of drawings. A figure that shows a feature can support a claim to that feature even where the text is brief.

The claims can wait. The description cannot. A provisional that reads like a thorough engineering disclosure, covering every form the invention might take, lets you spend the year freely and still arrive at the nonprovisional with your original date intact.

One provisional, many nonprovisionals, and the reverse

The benefit rules under 35 U.S.C. § 119(e) are more flexible than most inventors realize.

Several nonprovisionals from one provisional. There is no limit on how many nonprovisional applications can claim the benefit of the same provisional. If your provisional described a new device, a method of using it, and a manufacturing process, you can file separate nonprovisionals on each, all within the 12-month window and all entitled to the provisional's date. An expansive provisional can seed an entire portfolio.

Several provisionals into one nonprovisional. Development rarely stops the day you file. Many inventors file a first provisional on the core idea, then add provisionals as improvements and test results come in. A single nonprovisional can claim the benefit of all of them, and each claim gets the date of the earliest provisional that supports it. The constraint is timing: the nonprovisional must be filed within 12 months of the earliest provisional whose date you want to keep, and the applications must share at least one inventor.

How much does each application cost?

The USPTO fee gap is wide. A provisional costs $65, $130, or $325 to file depending on whether you qualify as a micro, small, or large entity. The filing, search, and examination fees on a nonprovisional total $400, $800, or $2,000, and the nonprovisional carries later costs the provisional never does: excess claim fees, the issue fee, and maintenance fees to keep the patent in force.

Professional fees follow the same pattern, because a provisional has no claims to write and no declaration or disclosure statement to prepare. Keep the savings in perspective, though. A provisional written thoroughly enough to protect you costs more than a bare-bones one, and that investment is usually recovered when the nonprovisional is drafted, because much of the description can be reused.

The deadline, and what happens if you miss it

The 12-month deadline is the one hard edge in the provisional system. If the anniversary falls on a weekend or federal holiday, it rolls to the next business day. Otherwise there is no extension. If you miss it unintentionally, USPTO rules allow a petition to restore the benefit claim, for a substantial fee, as long as the nonprovisional is filed within 14 months of the provisional. After that, no remedy exists, and any disclosure or sale you made under "patent pending" is now prior art against you.

When to skip the provisional and file a nonprovisional directly

• The invention is finished. If you already know exactly what you want to claim, the provisional year adds delay without adding information.
• Speed to grant matters. Examination does not start until the nonprovisional is filed, so a provisional pushes your issue date back by up to a year. If you need an enforceable patent quickly, file the nonprovisional now and consider prioritized examination.
• You want a design patent. Design applications cannot claim the benefit of a provisional.

Inventors outside the United States should also note that since July 20, 2026, foreign-domiciled applicants must file both provisional and nonprovisional applications through a USPTO-registered practitioner. See our guide to the 2026 foreign-applicant practitioner requirement.

Not sure whether your idea is ready for a provisional or a nonprovisional? Book a free 20-minute strategy call or send us a note and we will tell you which filing makes sense first.

Sources

• 35 U.S.C. § 111: Application (including § 111(b), provisional application)
• 35 U.S.C. § 119(e): Benefit of earlier filing date of a provisional application
• 37 CFR 1.53: Application number, filing date, and completion of application
• 37 CFR 1.78: Claiming benefit of earlier filing date (including restoration of a provisional benefit claim)
• USPTO: Provisional application for patent
• USPTO fee schedule
• New Railhead Manufacturing v. Vermeer Manufacturing, 298 F.3d 1290 (Fed. Cir. 2002)

Frequently asked questions

How long does a provisional patent application last?

Twelve months from its filing date. A provisional application is automatically abandoned at the end of that period and cannot be extended or renewed. To keep the filing date, you must file a nonprovisional application claiming the benefit of the provisional before the 12 months run out.

Does a provisional patent application turn into a patent?

No. A provisional application is never examined by the USPTO and never issues as a patent on its own. Its only job is to establish a filing date. The nonprovisional application you file within 12 months is what gets examined and can become an issued patent.

Can I say "patent pending" with only a provisional application?

Yes. Once a provisional application is on file, you may mark your product and marketing materials "patent pending." The marking must come off if the provisional expires without a nonprovisional being filed, because falsely marking a product as patent pending is prohibited by federal law.

How much does a provisional patent application cost?

The USPTO filing fee for a provisional application is $65 for a micro entity, $130 for a small entity, and $325 for a large entity, compared with $400, $800, and $2,000 for the filing, search, and examination fees on a nonprovisional application. Drafting fees are also usually lower because a provisional does not require formal claims, an oath or declaration, or an information disclosure statement.

Does a provisional patent application need claims?

No. Federal law exempts provisional applications from the claim requirement, and many are filed without any. What a provisional must have is a written description and drawings detailed enough to support the claims you will eventually file. If the provisional does not describe a feature, a later claim to that feature will not get the provisional's filing date.

Can one provisional application support more than one nonprovisional application?

Yes. Any number of nonprovisional applications can claim the benefit of the same provisional, as long as each is filed within the 12-month window and shares at least one inventor with it. The reverse is also true: a single nonprovisional can claim the benefit of several provisionals filed over the preceding 12 months.

What happens if I miss the 12-month deadline?

The provisional is abandoned and its filing date is lost. If the delay was unintentional, the USPTO allows a petition to restore the benefit claim for up to two additional months, with a substantial fee. After 14 months there is no remedy, and any public disclosure or sale you made in the meantime can be used against your later application.

This article is general information about patent practice before the U.S. Patent and Trademark Office and is not legal advice. Every application is different — talk with a registered practitioner about your own situation before acting.