Provisional vs Utility Patent: Which Should You File?

A provisional patent applicationcosts $65 (micro entity), buys you 12 months of “patent pending” status, and is never examined. A non-provisional utility patent costs $320+ in USPTO fees, gets fully examined, and — if granted — protects your invention for 20 years from the filing date. Most first-time inventors should file a provisional first. But not all of them. This guide explains the actual differences (legal, strategic, financial), shows you when each filing path makes sense, and walks through the conversion deadline that catches inventors off guard every year.

The 60-second comparison

What a provisional actually does

A provisional application is a placeholder. It establishes a filing date (also called a “priority date”) at the USPTO, and that date is what determines who wins under the first-inventor-to-file system the U.S. adopted in 2013 under the America Invents Act. Whoever files first — provisional or otherwise — wins.

A provisional gives you four practical benefits:

• Priority date.If you convert within 12 months, your non-provisional inherits the provisional’s filing date. Anything published, sold, or filed by anyone else afterthat date can’t be cited as prior art against you.
• “Patent pending” status. You can mark your product, your website, your pitch deck — all of it. This carries real legal weight as a notice mechanism, and real psychological weight in conversations with manufacturers, licensees, and investors.
• 12 months of validation runway. You can run a Kickstarter, demo at a trade show, talk to manufacturers, or shop the invention to potential licensees without burning your patent rights — the clock starts on day one of the provisional, not on day one of the non-provisional.
• Foreign-priority anchor. Most countries recognize the U.S. provisional filing date as the priority date for filings in their jurisdiction, as long as you file within 12 months under the Paris Convention or a PCT application.

What a provisional does notgive you: enforceable rights, an examined patent, or a permanent record once the 12 months elapses. If you don’t convert, the provisional doesn’t even publish — it just lapses silently.

What a utility patent actually does

A non-provisional utility patent — what most people just call “a patent” — is the actual legal instrument. It defines the precise scope of your exclusive right through its claims, it goes through examination at the USPTO, and once granted it gives you the right to exclude others from making, using, selling, offering for sale, or importing your invention in the U.S. for 20 years from the filing date.

A non-provisional has six required parts:

1. Title
2. Background of the invention
3. Brief summary
4. Brief description of drawings
5. Detailed description (the enabling disclosure under 35 U.S.C. §112)
6. Claims (numbered, single-sentence statements that define legal scope)

The claims are what get litigated, what get licensed, and what determine whether a competitor’s product infringes. A patent with weak claims is worth less than no patent at all because it gives the inventor a false sense of protection while doing nothing to deter competitors. This is why drafting claims is the single hardest part of the patent process and the one most inventors hire an attorney for, even when they DIY everything else.

For the full step-by-step walkthrough on drafting and filing, see our how to patent an idea guide.

The 12-month conversion deadline — how it really works

You file a provisional on (say) April 22, 2026. You now have exactly 12 months — until April 22, 2027 — to either:

1. File a non-provisional that claims priority back to the provisional. On the non-provisional cover sheet you reference the provisional’s application number. The non-provisional inherits the provisional’s priority date for anything that was disclosed in the provisional.
2. File a PCT (international) application that claims priority. Same mechanism, but routes you through the international patent system instead of the domestic one.
3. Let the provisional lapse and lose your filing date. The provisional never publishes; nothing is recoverable.

The 12-month deadline is hard. There is no extension mechanism. There is no “late filing” option. The USPTO has narrow restoration of priority rules under PCT for cases where the delay was “unintentional,” but those are not a backup plan you should rely on.

A second often-missed wrinkle: any disclosure you made duringthe 12-month provisional window can’t be cited against your non-provisional, but only if the disclosure is fully supported by what was in the provisional. New features added during the year — and disclosed in your demos, blog posts, or Kickstarter pages — get the non-provisional’s later filing date as their priority, not the provisional’s. Foreign patent rights are especially unforgiving on this point.

When to file a provisional first

A provisional is the right first move if any of these are true:

• You’re still iterating on the invention. The provisional locks in your priority date for what you have today; you can refine the design over the next 12 months and file the non-provisional with the most polished version.
• You’re about to publicly disclose. A Kickstarter launch, a trade show demo, a TechCrunch profile — any of these starts the 12-month grace clock on your U.S. patent rights and immediately ends your foreign rights. File the provisional before the disclosure.
• You need “patent pending” for sales/licensing conversations. $65 buys you the legal right to mark your product as patent pending. Manufacturers, licensees, and investors take that seriously.
• You’re cash-constrained. $65 vs. $4,000+ for an attorney-drafted non-provisional. The provisional gives you 12 months to find money, decide whether the invention is commercially viable, and commit to the non-provisional.
• You want to start the foreign-priority clock. The provisional anchors your priority date for international filings under the Paris Convention.

When to skip the provisional and file utility directly

A non-provisional first makes sense if:

• The invention is fully designed and commercially imminent.If you’re selling in 90 days and the invention won’t change, the 12-month buffer adds no value — you’re just delaying the patent grant.
• The invention is in a field where examination time matters. Pharmaceuticals, biotech, and medical devices often need a granted patent for FDA interactions, licensing deals, or capital raises. A provisional doesn’t serve those use cases — it’s not a granted patent.
• You already have a polished, attorney-drafted application ready to go. If your attorney has written a full set of claims and a complete specification, filing it as a provisional first just delays examination by 12 months and adds paperwork. Skip the provisional and start the examination clock.
• You’re filing a design patent.Design patents (which protect ornamental appearance, not function) don’t have a provisional path — you file the design application directly.

The disclosure trap — why thin provisionals fail

The single most common provisional mistake: filing a thin, half-formed disclosure to “just lock in the date,” then adding the real technical detail in the non-provisional 11 months later. This creates a problem under 35 U.S.C. §112: anything in your non-provisional that wasn’t supported by the provisional disclosure does not get the provisional’s priority date. It gets the non-provisional’s (later) date.

That sounds abstract, so here’s the concrete failure mode. You file a thin provisional in April 2026 for a coffee-grinder design. In June 2026 a Kickstarter campaign for a similar grinder is launched and goes viral. In April 2027 you file a beefed-up non-provisional with claims that include a feature you didn’t originally describe in the provisional. The Kickstarter launch is now valid prior art against that new feature, because the new feature’s effective filing date is April 2027, not April 2026. Your patent gets rejected on the new feature, and you can’t go back.

The fix: treat the provisional like a real application. Describe every embodiment, every alternative, every component, every variation you can think of. Drawings carry the same disclosure weight as text — invest in clear figures even if you skip formal ink drawings for the provisional. The MPEP’s test for adequate provisional support is the same §112 enabling disclosure standard the non-provisional has to meet.

Decision tree

If you’re still picking a path, walk through this:

1. Is your invention’s design final and not going to change? Yes → consider filing utility directly. No → file provisional.
2. Are you about to publicly disclose (Kickstarter, demo, press)? Yes → file somethingfirst. A provisional is the cheapest way to do that. Don’t disclose without a filing date.
3. Is your budget under $1,000? Yes → file a DIY provisional, use the 12 months to validate, then decide on the non-provisional commitment.
4. Is the invention software/biotech/pharma where claims are subtle and the prior-art density is high? Yes →hire an attorney for both the provisional and the non-provisional. The provisional’s disclosure has to be airtight or you waste the priority date.
5. Are you protecting ornamental design only? Yes →file a design patent application directly. Provisionals don’t apply.

For a deeper budget breakdown across both paths, see our cost to patent an idea guide. For the full process walkthrough, see how to patent an idea.

Bottom line

For most independent inventors, the answer is: file a thorough provisional first, then convert to a non-provisional within 12 months.$65 in USPTO fees buys you a year of optionality, foreign-priority anchoring, and patent-pending status — all while you validate the market and refine the design. Just don’t under-invest in the provisional’s disclosure. Half-formed provisionals are how priority dates get lost.

See LegalZoom provisional pricing See LegalZoom utility pricing

Before you file either one, run your idea through the free IsItPatented.ai scanner — the cheapest way to find out whether your invention has a clear path before you commit to the filing fee.

Frequently asked questions

What is the difference between a provisional and a utility patent?

A provisional patent application is a placeholder filing that locks in your priority date for 12 months and is never examined. It costs $65 at the micro-entity tier. A non-provisional utility patent is the actual application the USPTO examines and (if allowed) issues as a granted patent. It costs $320+ in micro-entity USPTO fees and protects the invention for 20 years from filing. Most first-time inventors file a provisional first, then convert to a non-provisional within 12 months.

How long does a provisional patent last?

A provisional patent application lasts exactly 12 months from its filing date. There is no extension and no late-filing option. If you do not file a non-provisional that claims priority back to your provisional within those 12 months, the provisional lapses and your priority date is permanently lost. Calendar the deadline the day you file.

Does a provisional patent give you patent protection?

A provisional does not grant any enforceable patent rights on its own — only an issued patent does that. What it gives you is a priority date and the legal right to mark your product “patent pending,” which is enough to deter most copycats and to start commercial conversations with manufacturers, investors, and licensees. The actual enforceable protection only kicks in if and when your non-provisional issues as a granted patent.

Can I sell or license my invention with just a provisional patent?

Yes. You can market the invention, raise money, license it, demonstrate it publicly, and even sell products embodying it during the 12-month provisional period — all under “patent pending” status. The provisional preserves your priority date, which is what licensees and acquirers care about. Just remember that public disclosure starts the 12-month conversion clock and can also trigger foreign patent-rights deadlines.

What happens if I miss the 12-month provisional deadline?

If you do not file a non-provisional within 12 months of your provisional filing date, the provisional lapses and the priority date is gone. You can still file a new application, but it will have the new filing date as its priority date — meaning any prior art (including your own public disclosures) that emerged in the intervening 12 months can be used to reject your claims. There are no extensions to the 12-month deadline.

Should I skip the provisional and file a utility patent directly?

Skip the provisional only if your invention is fully developed, your prior-art landscape is clear, you have the budget for a non-provisional today, and you want to start examination immediately. Most inventors fail one of those four tests, which is why the provisional exists. A provisional buys 12 months of cheap optionality — use it unless you have a specific reason not to.

Related guides

Filing strategy varies a lot by what you’re inventing. These guides go deeper on edge cases:

• How to patent an app idea — software inventions have an unusual provisional/utility tradeoff because Alice rejection rates are so high. Read this before paying the utility fee.
• A short history of US patent law — the “provisional” option only exists because of a 1995 reform. Understanding why it was created helps you use it correctly.

Sources

• USPTO — Provisional Application for Patent
• USPTO — Nonprovisional (Utility) Patent Application
• USPTO — Fee Schedule
• USPTO — Micro Entity Status
• 35 U.S.C. §112 — Specification (the enabling-disclosure requirement)
• 35 U.S.C. §119 — Foreign priority and the 12-month provisional conversion deadline
• USPTO — America Invents Act (first-inventor-to-file)