SBIR Phase I Budget Planning: Getting Your Line Items Right

A technically brilliant SBIR proposal can still lose points on a budget that does not add up. Reviewers are not just reading your research plan — they are checking whether every dollar you requested connects to a specific task, whether your rates are reasonable, and whether the math between your budget and your work plan is internally consistent. Budget problems do not always sink a proposal outright, but they create doubt about execution capability at exactly the moment you need reviewers to feel confident.

Phase I budgets vary significantly by agency, from $50,000 at some civilian agencies to $275,000 at DoD for certain topics. Regardless of the ceiling, the principles for building a defensible budget are the same. Here is how to get the line items right.

The Core Line Items Every Phase I Budget Includes

SBIR budgets follow a standard federal cost structure, and understanding each category prevents the formatting errors that signal inexperience to reviewers.

Principal Investigator and key personnel labor is almost always the largest line item, typically consuming 50-70 percent of the total budget. List each person by name and role, their hourly or monthly rate, and the number of hours or months they will contribute. PI commitment matters — most agencies require the PI to dedicate a minimum percentage of effort (often 33-51 percent of their working time) to the project. A PI listed at 10 percent effort signals to reviewers that the PI is not genuinely leading the work.

Fringe benefits cover employer-paid taxes, health insurance, retirement contributions, and other benefits. Use your company's actual fringe rate if you have one. If you are a new company without established rates, a fringe rate between 25-35 percent of salary is typical for a small technology firm. Some agencies accept a combined salary-plus-fringe rate, while others require them broken out separately — check the solicitation instructions.

Materials and supplies covers consumables needed for the research: lab reagents, electronic components, software licenses, prototyping materials. Each item or category should be listed with estimated cost and a brief justification explaining why it is needed for the project. Reviewers question vague line items like "miscellaneous supplies — $5,000."

Equipment purchases over $5,000 per unit require strong justification. Reviewers will ask why the equipment cannot be rented, shared, or accessed through a university partnership. If you genuinely need to purchase equipment, explain why existing alternatives are insufficient and how the equipment is essential to achieving your Phase I objectives. Most successful Phase I proposals minimize or eliminate equipment purchases.

Travel typically covers one or two trips: a visit to the agency program manager and attendance at a relevant conference or SBIR-related event. Keep travel budgets modest — $3,000-$5,000 is typical. Excessive travel budgets raise questions about whether the money is better spent on research.

Subcontracts and consultants bring in specialized expertise your team lacks. This is where the SBIR work percentage rule becomes critical: the small business must perform a minimum percentage of the work (at least one-third for SBIR, at least 40 percent for STTR). Subcontract costs that push the small business below this threshold will result in rejection, regardless of how strong the technical plan is.

Indirect costs (also called overhead or facilities and administrative costs) cover rent, utilities, administrative staff, and general business operations not directly tied to the project. If your company has a Negotiated Indirect Cost Rate Agreement (NICRA) with a federal agency, use that rate. New companies without a NICRA can use the de minimis rate of 10 percent of modified total direct costs, as allowed under 2 CFR 200.414. Some companies with low overhead choose the de minimis rate even when they could negotiate higher — simplicity has value when you are managing your first federal award.

For a complete walkthrough of budget justification across federal grants, the Budget Justification Basics guide covers the principles that apply to SBIR and beyond.

Aligning Budget to Work Plan

The fastest way to lose reviewer confidence is a budget that does not match the technical work plan. Every task in your work plan should have corresponding labor hours and costs in the budget. Every budget line item should trace back to a specific task or deliverable.

Build the budget from the work plan, not the other way around. Start by listing every task, estimating the hours each team member will spend on it, and identifying the materials or services required. Then add up the costs. If the total exceeds the agency ceiling, cut scope from the work plan — do not simply reduce line items while leaving the same technical objectives in place. Reviewers spot that disconnect immediately.

A simple cross-reference table in your budget justification — mapping each task to the personnel, materials, and subcontract costs it requires — demonstrates rigor and makes the reviewer's job easier. Anything that makes the reviewer's job easier works in your favor.

Common Budget Mistakes That Cost Points

Inflated salary rates. Reviewers benchmark PI and key personnel rates against market data for your region and discipline. A software engineer in Kansas City listed at $250 per hour will draw scrutiny. Use rates consistent with your company's actual payroll or, if you are a new company, rates consistent with Bureau of Labor Statistics data for your area and occupation.

Unjustified equipment purchases. A $40,000 piece of lab equipment in a $150,000 Phase I budget consumes nearly a third of the award on a single item. Unless the equipment is genuinely essential and cannot be accessed any other way, this raises immediate questions about budget efficiency.

Subcontracting too much work. The work percentage rule exists to ensure the small business is doing the core innovation, not acting as a pass-through for a university lab or large contractor. Structure subcontracts carefully and ensure your company retains the primary research role.

Forgetting to justify. Every line item needs one to two sentences explaining why the cost is necessary and how it connects to the technical objectives. A budget with no justification narrative — just numbers in a table — will lose points regardless of whether the amounts are reasonable.

Ignoring agency templates. Most agencies provide specific budget templates or forms (NSF uses FastLane/Research.gov budget pages, DoD uses the Cost Volume format, NIH uses the R&R Budget form). Using the wrong format or omitting required fields creates administrative problems that can delay or disqualify your proposal.

Companies exploring SBIR opportunities across multiple agencies can find budget templates and agency-specific requirements on Granted's SBIR page.

Post-Reauthorization: What Changed and What Did Not

The SBIR reauthorization did not alter Phase I budget ceilings or cost category rules. The standard budget structure remains the same. However, two indirect changes are worth noting.

First, increased scrutiny on foreign subcontractor costs means that any international collaboration must be thoroughly justified. Reviewers are paying closer attention to where subcontract work is performed and whether foreign involvement raises supply chain or security concerns, particularly for DoD topics.

Second, the emphasis on commercialization means that reviewers may look more favorably on budgets that allocate modest resources to customer discovery or market validation activities during Phase I — a few thousand dollars for customer interviews or industry conference attendance. This is not required, but it aligns with the post-reauthorization signal that commercialization thinking should start in Phase I, not Phase II.

For a detailed template with example line items and justification language, the SBIR budget template walkthrough breaks down a sample budget line by line.

Related SBIR reading:

• SBIR Grant Guide 2026
• SBIR Indirect Cost Rates Explained
• Tips for Writing a Successful SBIR Proposal

Getting budget line items right is the kind of detail work that separates funded proposals from near-misses — Granted can help you build a budget that matches your technical plan and meets the standards reviewers expect.