NSF SBIR Phase I: Project Pitch, Deadlines and How to Apply

NSF runs America's Seed Fund under solicitation NSF 26-510: Phase I, Phase II and Fast-Track awards for deep technology with real technical risk. The program funds across nearly all technology areas and does not solicit specific technologies or procure goods and services. NSF takes no equity, and the gate into the whole thing is a Project Pitch.

Who this fits and who it does not

Proposals may only be submitted by firms qualifying as a small business concern: a US for-profit small business, 500 employees or fewer including affiliates, more than 50% owned and controlled by US citizens or permanent residents (13 CFR 121.702, with the exceptions that rule allows), with the work performed in the US. NSF adds three rules of its own, all written in NSF 26-510:

• The PI must be primarily employed by the small business. NSF states the threshold as more than half of the PI's time, and its program pages describe the commitment as at least one month (173 hours) of work per six months of project duration.
• For STTR, one PI and one co-PI are required: the PI at the company, the co-PI at the partner research institution.
• A Phase I or Fast-Track proposal needs an official invitation, issued in response to a Project Pitch. No pitch, no proposal.

It fits a company whose core innovation has not been proven and whose Phase I would answer that question. It does not fit incremental engineering, a product that already works and needs scale, or a project with no technical uncertainty. NSF's own suitability assessment on the Project Pitch page is a fair first filter.

How the process works

1. Submit a Project Pitch online. NSF says you hear back in about 1 to 2 months. Each company may submit one pitch per submission window, two pitches per 12-month period, and three total for the same project.
2. If invited, the invitation is valid for the next two submission deadlines. For Fast-Track, the full proposal must be submitted within four months of the invitation.
3. Write and submit the full proposal by a deadline. The next one: November 04, 2026 (First Wednesday in November, Annually Thereafter); then March 04, 2027 and July 07, 2027.
4. About six months after submission NSF notifies you about funding, per the NSF apply page.

Award sizes as the solicitation states them: Phase I up to $305,000; Phase II up to $1,250,000; Fast-Track up to $1,555,000. NSF lists Phase I, Phase II, Fast-Track and Supplements as its funding opportunities; there is no Direct to Phase II at NSF.

Counting backward from a deadline: the pitch comes first and its answer takes about 1 to 2 months (NSF's figure), so a company without an invitation should aim at the deadline after the next one; a company that already holds an invitation can write for the next deadline, with SAM.gov already active.

My read

• The pitch is the proposal in miniature. NSF asks you to explain the core high-risk technical innovation and why it is significantly better than existing solutions. Listing features is not enough, and that is the most common reason a pitch gets a no.
• Two pitches a year is a hard budget. I treat the first one as the real one.
• Fast-Track is attractive on paper, but it is reviewed as one application with a Phase II component, so the commercial plan has to be as strong as the science. For most first-time applicants Phase I alone is the cleaner bet.
• The primary-employment rule decides who can be PI before anything else is written.

Frequently asked questions

Can I apply without a Project Pitch invitation?

No. NSF 26-510 states that proposers must obtain an official invitation, and the invitation comes only from a pitch.

What happens if my pitch is declined?

You can submit a new pitch within the yearly limit, and a previously declined proposal requires a new pitch and a new invitation. A resubmitted proposal must be a significant revision and include a Resubmission Change Description.

Is there a Direct to Phase II at NSF?

No. The NSF route is Phase I, then Phase II, or Fast-Track by invitation. Direct to Phase II exists at NIH and in Department of War topics, not at NSF.

How much of the Phase I work can a partner do?

The SBIR/STTR rules on the share of work performed by the small business apply; NSF 26-510 sets them out and they differ between SBIR and STTR. I confirm the split for your project against the solicitation before the budget is built.