If you are about to file your first patent application, the first decision is whether to file a provisional or a non-provisional. The answer affects your timeline, your costs, and what you actually get for your money. Here is the working framework.
What each one is
Provisional patent application: a placeholder filing that establishes a priority date but does not start patent examination. The application sits in the USPTO for 12 months and then expires unless you file a corresponding non-provisional application that claims priority back to the provisional.
Non-provisional patent application: the actual patent application. The USPTO examines it, and if all goes well, it issues as a granted patent. Most utility patents are filed as non-provisionals from the start; some are filed as provisionals first and then converted.
A provisional is not a patent and never will be. It is a one-year option to file a real patent application with the earlier filing date.
What the provisional buys you
Three things:
Priority date. Your provisional filing date is the date the USPTO uses to evaluate whether your invention was novel at the time of filing. Anyone who files for the same invention after you, or who first sells or publishes the invention after your filing, loses to you. The priority date is the most legally valuable thing about a patent filing.
One year of patent pending. During the 12-month provisional period, you can mark your product or technology patent pending, which has commercial and reputational value even before the patent issues.
Time to decide. You have 12 months to evaluate the commercial viability of the invention before committing to the full non-provisional filing. If the invention turns out not to be commercially valuable, you can let the provisional expire and save the cost of the non-provisional.
What the provisional does not buy you
A few common misunderstandings:
It is not a patent. A provisional cannot be enforced against an infringer. You cannot sue based on a provisional. You cannot collect royalties based on a provisional.
It does not extend your patent term. A utility patent term runs 20 years from the filing date of the non-provisional. The provisional filing date is the priority date for novelty purposes, but the 20-year clock starts at the non-provisional.
It does not preserve priority for what is not described. The provisional only establishes priority for the invention as described in the provisional. If you add new material to the non-provisional that was not in the provisional, the new material gets the later filing date.
This last point is the most expensive mistake. Many founders file rushed provisionals that lack the technical detail of the eventual non-provisional, then discover during prosecution or litigation that key claim elements are not entitled to the provisional date.
Cost comparison
Provisional: USPTO filing fee for a small entity is $300; for a micro entity, $120. Attorney fees for drafting a provisional range from $1,500 to $5,000 depending on complexity. Total: roughly $2,000 to $5,000.
Non-provisional (utility): USPTO filing fee for a small entity is $1,820 plus examination fees plus search fees. Attorney fees for drafting a non-provisional range from $5,000 to $15,000-plus. Total filing cost: roughly $8,000 to $20,000. Prosecution (responding to office actions) typically adds another $3,000 to $10,000.
The provisional saves $5,000 to $15,000 in the short term, but you eventually pay the non-provisional cost too if you proceed. The actual saving is the time value of money over 12 months plus the option value of not filing the non-provisional if the invention does not pan out.
When the provisional is the right move
Three scenarios:
You need to lock in a priority date but you are not sure about commercial viability. Provisional gives you 12 months to evaluate. If the product takes off, you file the non-provisional. If it does not, you save the non-provisional cost.
You need to lock in a priority date before a public disclosure. If you are about to present at a conference, launch a product, or do any other public disclosure, file the provisional first. The U.S. has a one-year grace period from disclosure, but foreign patent rights are lost immediately on public disclosure unless you have filed first.
You are in early-stage fundraising and need IP-pending status quickly. Provisional gives you patent-pending status almost immediately (filing date) without the full non-provisional cost.
When the non-provisional is the right move
Three scenarios:
The invention is ready and commercial viability is clear. If you are confident the product will be commercialized, skipping the provisional and going straight to non-provisional saves the duplicate filing cost.
You need a granted patent quickly. Provisional adds 12 months to your timeline before examination even starts. If you need a granted patent for licensing, litigation, or specific commercial purposes within 18 to 24 months, the provisional is a delay you cannot afford.
The invention is fully developed and the claims are stable. If the technical description and claims are not going to evolve materially, the non-provisional captures everything you need to capture.
Practical pitfalls
A few patterns that go wrong:
Thin provisionals. A provisional that says "here is my idea for X" without the technical detail of how X works does not establish priority for the implementation details. The provisional should look like a real patent specification, just without the formal claims (claims in a provisional are optional).
Missing claims-in-spirit. If you know what claims you are going to file in the non-provisional, write the provisional specification to support those claims. A provisional that does not describe the inventive features in claims-worthy detail is going to lose its priority date for those features.
Forgetting to convert. The 12-month deadline for filing the non-provisional is firm. There are no extensions. Many founders let provisionals expire by accident.
Filing the provisional without a plan for the non-provisional. Provisionals are a step, not a strategy. Decide before filing whether you plan to file the non-provisional, what countries you are targeting (PCT international application is also a 12-month decision), and what the budget looks like.
What about international protection
The 12-month provisional period also serves another role: it preserves your right to file a Patent Cooperation Treaty (PCT) application or direct foreign filings within 12 months of your priority date. If you want patent protection outside the U.S., the PCT filing is generally the most cost-effective path, and it has to happen within 12 months of the provisional (or, if no provisional, within 12 months of the non-provisional).
When to bring in a patent attorney
Patent drafting is one of the few areas where self-service is genuinely a bad idea. The technical writing required to support patent claims is specialized, and a poorly drafted provisional that loses its priority date can be a multi-million-dollar mistake.
LawSensai can match you with a patent attorney in your area for either the provisional or the non-provisional, or for a strategy consultation before you file.