The SBIR process takes 9-18 months from first thought to first dollar in your account. The fastest path is AFWERX Open Topic (~6 months). The slowest is NIH (~14-18 months). Most founders underestimate registration lead times and overestimate how quickly they can write a competitive proposal. This guide gives you the real timelines, agency by agency.
The master timeline
Here's what the full SBIR process looks like, end to end:
| Stage | Duration | Notes |
|---|---|---|
| Registration (SAM.gov, portals) | 4-8 weeks | Start before you have a deadline. This is the #1 avoidable delay. |
| Identify program + solicitation | 2-4 weeks | Which agency, which topic, which deadline |
| Proposal writing | 4-12 weeks | 150-400 hours depending on experience |
| Agency review | 3-7 months | Agency-dependent (see table below) |
| Award negotiation + contracting | 2-12 weeks | Grants are faster; DoD contracts are slower |
| First funding received | 2-4 weeks post-contract | Some agencies advance funds, some reimburse |
| Total: idea to cash | 9-18 months | Fastest: AFWERX (~6 mo). Slowest: NIH (~14+ mo) |
Agency-by-agency timelines
NSF -- ~10-14 months total
| Step | Timeline |
|---|---|
| Project Pitch submitted | Rolling (anytime) |
| Pitch response (invite/decline) | ~3 weeks |
| Full proposal submitted | Next quarterly window after invitation |
| Panel review + decision | 5-7 months from submission |
| Award negotiation | 2-4 weeks (grant mechanism, fast) |
| Total | ~10-14 months |
NSF's two-step process is the lowest-friction entry point. The Project Pitch takes 5-10 hours and gives you a fit signal in 3 weeks. If invited, plan 6-8 weeks for the full proposal. See our NSF pitch guide.
NIH -- ~12-18 months total
| Step | Timeline |
|---|---|
| Receipt dates | January 5, April 5, September 5 |
| Study section review | 4-5 months after receipt date |
| Advisory council review | 1-2 months after study section |
| Award notification | 6-11 months after submission |
| Notice of Award | 2-6 weeks after notification |
| Total | ~12-18 months |
NIH is the slowest major SBIR agency. Three fixed receipt dates per year means missing a deadline costs you 4 months. Preliminary data is critical -- plan to generate it before you start writing.
DoD / AFWERX -- ~6-10 months total (fastest)
| Step | Timeline |
|---|---|
| Solicitation open | Rolling (AFWERX Open Topic: Jan and Aug windows) |
| Submission to selection | ~90 days (AFWERX); 90-120 days (Army/Navy) |
| Contract negotiation | 1-3 months (DoD uses contracts, not grants) |
| Total | ~6-10 months |
AFWERX is the speed play. But remember: AFWERX Phase I is $75K for customer discovery (not R&D), and DoD contract negotiation adds time that grant agencies skip. See our AFWERX guide.
DOE -- ~12-16 months total
| Step | Timeline |
|---|---|
| FOA released | Typically August and November |
| Letter of Intent (mandatory) | ~3 weeks after FOA release |
| Full proposal due | ~4 months after FOA release |
| Review + notification | 3-6 months after submission |
| Total | ~12-16 months |
DOE requires a mandatory Letter of Intent -- miss it and you can't apply. Two solicitation cycles per year.
NASA -- ~11-14 months total
| Step | Timeline |
|---|---|
| Solicitation open | Expected to shift to rolling BAA model in 2026 (per NASA program office updates) |
| Submission to selection | ~5-6 months |
| Contract negotiation | 1-2 months |
| Total | ~11-14 months |
NASA is shifting from annual solicitations to a rolling BAA model with appendices released throughout the year -- a significant structural change that may speed up timelines.
Registration checklist
Start these before you have a specific deadline. Registration delays are the most preventable reason founders miss submission windows.
| Registration | Time | Required For |
|---|---|---|
| SAM.gov | 3-8 weeks | All federal grants (the bottleneck) |
| login.gov | Same day | SAM.gov, Research.gov, DSIP |
| Grants.gov | 1-2 weeks | NIH, DOE, most civilian agencies |
| DSIP (dodsbirsttr.mil) | 1-2 weeks | All DoD SBIR/STTR |
| Research.gov | 1-2 weeks | NSF |
| eRA Commons | 2-4 weeks | NIH (PI registration separate from org) |
| SBA Company Registry | 1-2 weeks | All SBIR/STTR |
SAM.gov is the bottleneck. It involves IRS TIN validation (confirming your tax ID, 3-5 business days), CAGE code assignment (your company's unique government vendor ID, 5-7 business days), and entity verification (confirming your business is real, 3-5 business days). Any data mismatch restarts the clock. Start 8 weeks early and follow up if you haven't heard back in 3 weeks.
How long does it take to write a competitive proposal?
The honest answer, based on 500+ proposals we've written and reviewed at Cada:
| Experience Level | Hours | Calendar Time |
|---|---|---|
| First-time applicant (solo) | 300-400 hours | 10-12 weeks |
| Experienced applicant | 150-200 hours | 6-8 weeks |
| With professional grant writer | 80-120 hours (founder time) | 4-6 weeks |
| NSF Project Pitch only | 5-10 hours | 1-2 days |
First-timers consistently underestimate by 2-3x. The 300-400 hours includes literature review, technical writing, budget justification, letters of support, commercialization plan, subcontractor agreements, and compliance paperwork.
The highest-leverage move for a first-time applicant: start with an NSF Project Pitch (5-10 hours, 3-week turnaround) to validate fit before investing 300 hours in a full proposal.
The Phase I to Phase II gap
The gap between Phase I and Phase II kills momentum. Know how each agency handles it:
| Agency | When to Apply for Phase II | Typical Gap |
|---|---|---|
| NSF | During Phase I (Fast-Track eliminates gap) | 0 months with Fast-Track; 3-5 months without |
| NIH | Within first 6 receipt dates after Phase I expires | 3-9 months |
| DoD/AFWERX | Invitation during Phase I execution | 2-4 months |
| DOE | Agency-directed | 3-6 months |
| NASA | During Phase I performance | 2-4 months |
Fast-Track is the gap killer. NSF and NIH both offer Fast-Track options that submit Phase I and Phase II as a single proposal, reviewed together. If your preliminary data is strong enough, this eliminates the gap entirely. See SBIR Phase I vs. Phase II vs. Phase III for details.
2026 timing note
The SBIR authorization lapse (October 2025 through March 2026) created a backlog. Agencies are restarting in this order:
- DoD and NIH: new solicitations March-April 2026
- NSF, DOE, NASA: April-May 2026
- Smaller agencies: through June 2026
Expect slightly longer review times as agencies clear the queue. The companies that submitted registrations and drafted proposals during the lapse will be first in line.
How to plan your SBIR timeline
Work backwards from your goal:
- Pick your target agency based on technology fit (see our SBIR guide)
- Identify the next submission deadline for that agency
- Subtract 8-12 weeks for proposal writing
- Subtract 8 weeks for registration (if not already registered)
- That's when you need to start -- not when you need to submit
If the math says you've already missed this cycle, don't rush a weak proposal. Prepare for the next cycle and submit something competitive.
Want help compressing the timeline?
The biggest time savings come from two things: knowing which agency fits your technology (so you don't waste weeks on the wrong program) and having an experienced writer handle the proposal architecture (so your 300-hour process becomes 80-120 hours). Our Strategy Review covers both.