A share of SBIR proposals are never scored. They are screened out before review for reasons that have nothing to do with the technology, and the applicant usually finds out weeks later in a one-line notice. These failures are entirely avoidable, and they are more common among first-time applicants than anyone likes to admit.
Package errors
Late submission. Deadlines are enforced by the clock on the portal, in the stated time zone, and portals slow down badly in the final hours. A submission that starts uploading before the deadline and finishes after it is late. Aim to submit days early; you can usually replace a submitted proposal until the deadline anyway.
Exceeding the page limit. Some systems truncate silently and reviewers simply never see your last pages. Page limits, font sizes and margins are per-agency and per-solicitation, and whether appendices, letters and references count toward the limit varies too. Take the numbers from the document you are answering.
Missing a required volume or form. Technical, budget, commercialization, certifications, forms — each solicitation lists its own set, and an incomplete package can be screened out without anyone asking you for the missing piece.
Identity and eligibility errors
Expired registrations. The federal entity registration renews annually, and it can lapse quietly while you are writing. If it is not active on submission day, the submission fails. The SBIR company registry and agency portal accounts have their own requirements.
Ineligible entity status. Company size, ownership and control, and the place of performance all carry statutory conditions. Outside investment can change your eligibility, and this is a question for your own counsel rather than something to assume — the rules differ between SBIR and STTR, as our comparison of the two programs explains.
Wrong topic number. Cut and paste from an older draft, submit under a closed topic or the wrong agency's numbering, and the proposal lands somewhere it cannot be evaluated. Check every place the number appears.
Why nobody rescues you
Federal competitions run on equal treatment. If a contracting officer let one applicant fix a missing volume after the deadline, every other applicant would have grounds to complain, so the answer is almost always no. There is generally no cure period, no courtesy call, and no partial credit. The screening is often clerical, applied uniformly, and done before any technical reader is involved.
Treat this as the cheapest risk in the entire process to eliminate. A structured pre-submission pass done by someone other than the author, a week out, catches all six. Budget arithmetic that contradicts the narrative is a close cousin and is covered in budget mistakes that sink an application, while the overall sequence lives in our SBIR application guide. Given the base rates described in SBIR success rates, losing on a formatting rule rather than on the merits is an expensive way to spend a cycle.
Projects House works on the part that actually decides the outcome once your proposal is in front of a reviewer: the technical approach and the build behind it. Get in touch through the contact form.