More funders now ask applicants to prove that a project is worth the money. For many federal infrastructure, transportation and resilience grants, that proof is a benefit-cost analysis (BCA), also called a cost-benefit analysis. A weak BCA can sink an otherwise strong application.
What a benefit-cost analysis does
A BCA puts a dollar value on everything a project costs and everything it delivers over its useful life. It then converts those amounts into today’s dollars and compares them. The answer tells a funder whether the public gets more value out than it puts in.
The numbers funders look at
- Benefit-cost ratio (BCR): total discounted benefits divided by total discounted costs. A ratio above 1.0 means the benefits exceed the costs.
- Net present value (NPV): discounted benefits minus discounted costs. A positive NPV means the project adds value.
- Payback period: how long it takes for benefits to cover the investment.
What counts as a benefit
That depends on the program and its guidance, but common benefits include:
- Lives saved and injuries avoided
- Travel time savings and lower vehicle operating costs
- Avoided damage from floods, fire and other hazards
- Lower emissions and better health outcomes
- Reduced maintenance costs and a longer asset life
- Economic activity, such as jobs and business access, when the funder allows it
Step by step
- Read the funder’s guidance first. Federal programs set their own discount rates, analysis periods, benefit values and, in some cases, required tools.
- Define the base case and the project. Benefits are measured as the difference between the two.
- Estimate the full costs: capital, operations, maintenance, rehabilitation and remaining value.
- Quantify and monetize the benefits using accepted values and documented data.
- Discount everything to present value and calculate the BCR and NPV.
- Test sensitivity. Show what happens if costs rise or benefits fall.
- Write it up clearly. Reviewers need to follow each assumption back to a source.
Common mistakes that cost points
- Counting the same benefit twice
- Using a discount rate or benefit value the funder doesn’t accept
- Leaving out operating and maintenance costs
- Claiming benefits the project won’t cause
- Submitting a spreadsheet with no narrative, or a narrative with no workbook
BCA or feasibility study?
A feasibility study asks whether a project can work. A BCA asks whether it is worth doing. Many applications need both. If you’re still deciding which funding path fits, see grants or government contracts.
Frequently asked questions
What is a good benefit-cost ratio for a grant?
A ratio above 1.0 means benefits exceed costs, and some programs set 1.0 as the minimum. A higher ratio generally strengthens an application, but reviewers also score how credible and well documented the analysis is.
Is a benefit-cost analysis the same as a cost-benefit analysis?
Yes. The two terms mean the same thing. Federal agencies usually say benefit-cost analysis, while many other organizations say cost-benefit analysis.
Who can prepare a benefit-cost analysis for a grant?
An economist or consultant experienced with the funder’s guidance usually prepares it. Some agencies also provide their own tools, which must be used correctly for the analysis to be accepted.
How long does a benefit-cost analysis take?
Most take two to six weeks, depending on the project size, the data available and the funder’s requirements.
Work with GERC
GERC prepares cost-benefit analyses for grant applications, public agencies and government proposals. The work is led by Dr. Shirley Ayangbah, who holds an MA in Economics and a PhD in International Economic and Financial Law. GERC is a woman-owned firm in San Bernardino, registered in SAM.gov under CAGE code 11SD2 and certified by the State of California as a Small Business (Micro) and a Small Business for Public Works (SB-PW). Book a consultation or see our capability statement.