SBIR budget justification line-by-line examples

Why worked examples matter

Cost proposal templates exist on every agency website, but they tell you the fields to fill, not what to write in them. A first-time SBIR firm looking at a blank cost proposal spreadsheet often makes the same mistake: they pad the hours, leave the indirect line unsupported, and submit a cost narrative that does not tie back to the technical SOW. This piece walks three worked examples — a $150K Phase I, a $250K Phase I (at the current DoD ceiling), and a $1.8M Phase II — so the structure is concrete, not hypothetical.

1. Step 1 — Direct labor: List all personnel with hours × loaded rate. Rates must match your DCAA-approved rate agreement or provisional rates.
2. Step 2 — Fringe + overhead: Apply approved indirect rates to direct labor base. Show the math — auditors check the arithmetic.
3. Step 3 — Subcontractors: Attach quotes or SOW excerpts for any sub above $150K. Cost analysis required above simplified acquisition threshold.
4. Step 4 — Other direct costs: Travel, materials, equipment. Each line needs a performance justification, not just a dollar amount.
5. Step 5 — Fee: Capped at 7% for Phase I SBIR (DoD). Apply to total direct + indirect costs, not G&A base.

Example 1 — $150K Phase I (NSF)

Typical NSF Phase I ceiling is $275K as of 2026, but many firms propose at $150-200K for focused 6-month feasibility work. The structure:

Line	Amount	Basis
Direct labor	$72,000	PI 300h @ $180, Senior Eng 200h @ $150, Junior Eng 150h @ $80. Total 650 hours.
Fringe (28%)	$20,160	Employer FICA, health, retirement, PTO.
Overhead (25% of labor+fringe)	$23,040	Rent, utilities, admin, accounting.
Materials	$6,000	Cloud compute $4K (AWS GPU), dataset license $2K.
Travel	$3,500	One kickoff trip, one final review trip, GSA per diem.
Subcontract (academic)	$12,000	University collaborator, 80 hours at $150/h loaded.
G&A (10%)	$13,670	Applied to total cost input.
Subtotal	$150,370	Total cost before fee.
Fee (7%)	—	Excluded here for NSF (NSF generally does not allow fee on Phase I).
Total	$150,370	Round to $150K for clean submission.

Cost narrative excerpt: "Direct labor of 650 hours supports SOW Tasks 1-4 as described in the technical volume. Task 1 (data acquisition, 100 hours) is performed primarily by the Senior Engineer with oversight from the PI. Task 2 (model development, 250 hours) is split across PI and Senior Engineer. Task 3 (evaluation, 200 hours) adds the Junior Engineer. Task 4 (final report and deliverable, 100 hours) is led by the PI. The academic subcontract supports Task 2 by providing access to a specialized evaluation dataset not otherwise available..."

Example 2 — $250K Phase I (DoD ceiling)

DoD raised the Phase I ceiling to $314K in recent cycles; many components still fund at $250K. Structure for a $250K award with 7% fee:

Line	Amount	Basis
Direct labor	$118,000	PI 400h @ $200, Senior Eng 400h @ $160, Mid Eng 300h @ $110, PM 80h @ $140.
Fringe (30%)	$35,400	Employer taxes, benefits, PTO.
Overhead (28%)	$42,952	Applied to labor+fringe.
Materials	$12,000	Cloud compute (secured enclave), data access fees.
Travel	$5,500	Kickoff + mid-review + final (3 trips, GSA per diem).
Consultants	$8,000	Domain expert, 50 hours at $160 capped.
ODC	$3,000	FedRAMP environment setup fees.
G&A (12%)	$26,980	Applied to total cost input.
Subtotal (TCI)	$251,832	Adjust labor hours to land clean.
Fee (7%)	—	Add as allowed; many firms cap total at ceiling after fee.

DoD cost proposals require more documentation than civilian: subcontractor cost detail, consultant letter with rate basis, and provisional indirect rate documentation. Attach a cost narrative that runs 4-6 pages; DCAA can and does ask for expansion.

Example 3 — $1.8M Phase II (DoD)

A 24-month Phase II at the typical DoD funding level. Structure:

Line	Amount	Basis
Direct labor	$820,000	5 FTEs over 24 months, blended rate ~$170 loaded, ~4,800 hours.
Fringe (30%)	$246,000	Applied to direct labor.
Overhead (30%)	$319,800	Applied to labor+fringe.
Materials	$80,000	Cloud compute (~$3K/mo over 24 mo), dataset licenses, test harness hardware.
Travel	$30,000	Quarterly reviews, conferences, customer meetings.
Subcontracts	$180,000	University partner + integration subcontractor. 10% of total, well within 50% cap.
ODC	$20,000	ATO/FedRAMP support, publication, security review.
G&A (12%)	$204,696	On total cost input.
Subtotal	$1,900,496	Adjust to land at $1.8M after fee.
Fee (7%)	included above	Typically applied to TCI.

A Phase II cost proposal lives or dies on the labor plan. Show a loading chart by month, by labor category, tied to the task-month matrix in the SOW. A CO looking at the Phase II should be able to reconcile every hour to a specific task in a specific month.

Attachments the CO wants

• Cost narrative (5-10 pages for Phase II)
• Labor loading chart by month and category
• Subcontract cost proposals (full, not summary)
• Consultant letters with rate basis
• Indirect rate documentation (provisional or NICRA)
• Fringe rate calculation
• Travel detail (purpose, destination, duration, per diem basis)
• Materials detail (vendor quotes for significant items)

What triggers a hold

A hold on the cost proposal — where the CO pauses the award pending clarification — is common and usually resolvable in 2-6 weeks. Triggers include: indirect rate without documentation, subcontract cost structure missing, consultant rate exceeding cap without waiver, travel without detail, or labor hours that do not reconcile to the SOW. Most holds are clerical; a few signal structural problems that can ultimately cost the award.

Frequently asked questions