Provisional vs. Non-Provisional Patent: Which Should You File?

If you are weighing a provisional vs non-provisional patent, you have already done the hard part: you have something worth protecting. The choice between these two filing types is one of the most common questions inventors ask, and the marketing around “provisional patents” causes a lot of confusion. This guide explains, in plain English, what each filing actually does, the 12-month clock that connects them, what they cost in 2026, and the strategy most inventors use. For the bigger picture of how patents fit alongside trademarks and copyrights, start with our pillar guide on which IP protection you need.

What a provisional application is (and isn’t)

A provisional patent application is a placeholder filing with the United States Patent and Trademark Office (USPTO). It does three useful things: it establishes an early effective filing date, it lets you legally mark your invention “patent pending,” and it buys you 12 months to decide whether to pursue a full patent.

What it is not is just as important:

• A provisional is never examined. The USPTO does not review it for patentability, novelty, or anything else. An examiner does not even read it unless you later rely on it.
• A provisional cannot become a patent on its own. It is not a “type of patent.” There is no such thing as a granted “provisional patent.” It is an application that expires.
• It does not require the formalities of a full application. You can file without formal patent claims, an oath or declaration, or a prior-art (information disclosure) statement.

Because the bar to file is low, a provisional is attractive. But that low bar is also where inventors get into trouble, which we cover below.

What a non-provisional application is

A non-provisional application is the real, complete patent application, the one that can actually result in a granted patent. It includes a full written description, at least one formal claim that defines the legal boundaries of your invention, any required drawings, and an inventor’s oath or declaration.

Unlike a provisional, a non-provisional enters the examination queue. A USPTO examiner searches the prior art, compares it to your claims, and issues office actions you must respond to. This back-and-forth is what eventually leads to a patent being granted or refused. If you want a realistic sense of how long that examination takes, see our guide on how long a patent takes.

In short: the provisional reserves your spot in line; the non-provisional is what actually gets reviewed.

The 12-month clock that connects them

This is the single most important rule to understand. A provisional application lasts 12 months, and that period cannot be extended. During those 12 months you can develop, test, and market your invention while saying “patent pending.”

To keep the benefit of the provisional’s filing date, you must file a corresponding non-provisional application that claims the provisional’s benefit before the 12 months run out. If you miss the deadline, the provisional automatically becomes abandoned when its pendency period expires, and you lose that early filing date. There is no grace period and no extension.

That filing date matters because the United States uses a “first-inventor-to-file” system. If two people invent something similar, the earlier filing date generally wins, so locking one in early can be valuable.

The “patent pending” question

Once you file a provisional, you may legally use the “patent pending” designation in connection with your invention. The same is true after you file a non-provisional. “Patent pending” is not a legal status that gives you enforcement rights; you cannot sue anyone for infringement until a patent actually grants. What it does is put competitors and potential copycats on notice that an application is on file, which can have real deterrent and marketing value.

Be careful here: marking something “patent pending” when you have not actually filed any application is false marking and can carry penalties. The phrase is only honest once a provisional or non-provisional is on file with the USPTO.

What each one costs (with entity discounts)

Patent fees are tiered by applicant size. Small-entity status (generally small businesses, independent inventors, and nonprofits) cuts most fees by about 60%, and micro-entity status (small entities that also meet income and prior-filing limits) cuts them by about 80%. These figures are 2026 USPTO government fees only and do not include attorney or drafting costs.

Provisional application filing fee (2026):

• Large entity: $325
• Small entity: $130
• Micro entity: $65

A provisional has no separate search or examination fee, which is a big part of why it is cheap.

Non-provisional utility application at filing (2026): this is a basic filing fee plus a search fee plus an examination fee. The combined filing subtotal is roughly:

• Large entity: $2,000 (basic $350 + search $770 + examination $880)
• Small entity: $800 (basic $140 + search $308 + examination $352)
• Micro entity: $400 (basic $70 + search $154 + examination $176)

More fees follow later (for example, an issue fee when the patent is allowed, plus maintenance fees to keep it alive). And in practice, the government fees are often the smaller part of a non-provisional. Professional drafting of a strong specification and claims is usually the largest expense. Always confirm current numbers on the official USPTO fee schedule, since the USPTO revises fees periodically.

The common strategy: provisional first to lock a date

The typical playbook for an individual inventor or startup is to file a provisional first to secure an early filing date inexpensively, then use the 12-month window to do the things that are easier with a date already locked in:

• Refine and test the invention.
• Gauge market interest and look for funding or licensees.
• Pitch investors or partners with “patent pending” status.
• Decide whether the invention justifies the larger cost of a non-provisional.

If the invention proves worth pursuing, you file the non-provisional within 12 months and claim the provisional’s date. If it does not, you can let the provisional lapse and walk away having spent very little.

This is a legitimate strategy, and it is very different from the do-it-yourself “mailing a description to yourself” myth. If you have heard that advice, read why it does not work in our guide on the poor man’s patent.

The biggest mistake: a weak provisional

Here is the trap. Because a provisional is cheap and never examined, inventors often file a thin, rushed description, sometimes just a few paragraphs or a sketch, and assume their date is safe for whatever they eventually claim.

It is not. A provisional only protects what it actually describes. When you later file the non-provisional and write formal claims, you only get the early filing date for the parts of those claims that were fully supported in the provisional. Anything new, or any feature the provisional described too vaguely, gets the later non-provisional date, which can be fatal if a competitor filed in between or if you publicly disclosed details.

In other words, a bad provisional can give you a false sense of security while protecting almost nothing. The fix is to make the provisional as complete as a real application: describe the invention thoroughly, include variations and alternatives, and add drawings. The provisional should be written with the future claims in mind, even though it does not contain formal claims itself. This is exactly where experienced help earns its cost. You can explore more on this topic in our patents section.

The bottom line

A provisional and a non-provisional are not competing products; they are two steps in one process. A provisional buys time and a filing date cheaply but never becomes a patent. A non-provisional is the examined application that can. For many inventors, filing a well-written provisional first, then a non-provisional within 12 months, balances cost against protection. Just remember the two rules that trip people up most: the 12-month clock cannot be extended, and a provisional only protects what it actually describes.

This article is general legal education, not legal advice, and reading it does not create an attorney-client relationship. Patent strategy depends heavily on your specific invention, timing, and disclosures. Before filing anything, consult a patent attorney or patent agent licensed to practice before the USPTO and, for any related questions, an attorney licensed in your jurisdiction.