When to use
- NIH R01/R21/P01 grant budget preparation
- Year-by-year animal cost forecasting
- Multi-aim grant applications with different animal needs
- Budget justification text generation for NIH 398 forms
ToolsConductScience tool
Academic Lab WorkflowsFree in-browser calculator
NIH Animal Budget Calculator.
Year-by-year breakdown of animal acquisition, per-diem, genotyping, and F&A costs per aim. Generates justification text for NIH R01/R21/P01 budget forms.
PrivateData stays in your browser
LiveNo sign-up required
Validated2026-04-08
CitableMethods and citation included
Calculator
Results update in placeTry it out
Load example NIH animal budget calculator data to see the full workflow
Grant Settings
Aim 1
Required fields
- Project title is required.
- Aim 1: name is required.
- Aim 1: animals needed must be at least 1.
Do not use for
- Non-NIH grants with different budget formats
- Clinical trial participant cost budgeting
- Per-diem rate calculation (use Recharge Rate Calculator)
Pearl
Check your institutional per-diem rate BEFORE budgeting — rates change annually and using outdated rates will require a budget revision.
Pearl
Include a 10% attrition buffer as a baseline, then adjust up for surgical models or complex genetics. Reviewers expect realistic numbers.
Pitfall
Forgetting to apply F&A to animal costs is a common budgeting error. A 55% F&A rate nearly doubles your effective animal cost.
Pitfall
Underestimating genotyping costs for transgenic colonies. Factor in genotyping for every pup born, not just the ones you keep.
1
Method
For each aim active in a given year: animals = ceil(aim_animals / years_active) / (1 − attrition). Acquisition cost = animals unit_cost. Per-diem = ceil(animals / animals_per_cage) avg_days rate/day. Genotyping = animals unit_cost. F&A = direct_costs indirect_rate. Totals sum across aims per year and across years for the grant period.
2
Validated
Last validated 2026-04-08. Calculations are designed for planning and documentation support; verify procurement decisions against manufacturer specifications or institutional SOPs.
3
How to cite
How to Cite
ConductScience NIH Animal Cost Grant Budget Calculator (v1.21.0). ConductScience. https://conductscience.com/tools/nih-animal-budget-calculator
NIH Grants Policy Statement (rev. 2023), Section 7.4: Allowable Costs — Animal Care.
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.
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Next steps
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