Budgeting Animal Costs for NIH Grant Applications
Animal costs are a significant component of NIH research grants. Proper budgeting requires:
Per-diem rate structure: NIH requires that institutional per-diem rates reflect actual costs of animal care, including labor, supplies, utilities, equipment depreciation, and veterinary oversight. These rates must not generate surplus (NIH Grants Policy Statement, Section 7.4).
Year-by-year planning: Animal needs often vary across grant years. Aim 1 may require animals in Years 1–3, while Aim 2 starts in Year 2. The budget should reflect this timeline with appropriate animal numbers per year.
Attrition and breeding yield: Budget for realistic losses. Transgenic breeding schemes may have 25–50% genotyping yield for heterozygous crosses. Surgical models have procedure-specific mortality rates. Document these in your budget justification.
F&A (indirect costs): Animal per-diem charges are subject to your institution's negotiated F&A rate. This is a significant cost multiplier — a 55% F&A rate adds $0.55 for every $1.00 of direct animal costs.
Budget justification: NIH reviewers expect clear per-aim breakdown of animal numbers, species, strain, and cost components. The justification should explain why specific numbers are needed and how attrition estimates were derived.