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Credit Subsidy vs. Loan Authority: Understanding the Cost of Credit
U.S. Department of Energy Loan Programs Office

Part I: Understanding Credit Subsidy


When the Federal government offers a loan or loan guarantee, it must assess and budget for any expected unreimbursed cost of the loan or loan guarantee, called the “credit subsidy cost,” per the Federal Credit Reform Act of 1990. The credit subsidy cost equals the net present value of estimated cash flows from the government minus estimated cash flows to the government over the life of the loan, excluding administrative costs. Depending on deal factors, the credit subsidy cost can be positive or negative. Positive credit subsidy values indicate an expected loss and must be accounted for in an office's or program’s budget. Negative credit subsidy indicates expected revenue to the government.  The credit subsidy cost payment is analogous to a Loan Loss Reserve Fund created for a single project. 

Planning for Risk and Using Credit Subsidy at the loan programs office

The potential for losses, indicated by positive credit subsidy, is an inherent characteristic of high-impact lending. The U.S. Department of Energy's Loan Programs Office (LPO) must take on and manage this risk to fulfill its mission and mandate. LPO conducts rigorous due diligence to ensure that all financed projects meet LPO’s statutory requirement of having a reasonable prospect of repayment. As part of its diligence, LPO’s Risk Management Division determines the probability of default, which is reflected in the credit rating assigned to the loan. LPO also determines the recovery rate (i.e., the percentage of the loan that is expected to be recovered in the event of default). LPO structures loans such that even if a borrower defaults, some or all the remaining value of the loan can be recovered. 

Even with these mitigants, providing high-impact debt financing carries risk. It is possible—and to be expected—that some projects with a reasonable prospect of repayment might not be repaid or recovered in full. Credit subsidy allows the government to budget for these expected losses.

Calculating Credit Subsidy

The credit subsidy cost is calculated by LPO using a model approved by the Office of Management and Budget (OMB) called the “Credit Subsidy Calculator.” 

A graphic about credit subsidy cost, which is calculated by LPO using a model approved by the Office of Management and Budget (OMB) called the Credit Subsidy Calculator.

The credit subsidy calculation accounts for: 

  1. Principal and interest repayments over time, including any risk-based charges.
  2. Risk-related factors: Default probability, likelihood of missed payments, and recovery rate according to deal structure.
  3. Certain fees paid to the government.
  4. Other relevant cash flows (e.g., loan prepayments).

The cash inflow and outflow variables are loaded into the Credit Subsidy Calculator, which returns the credit subsidy cost. This value is the estimated “cost to the government,” or expected loss (if any) from the loan when the above factors are considered. The calculation discounts future payments—both disbursements and loan repayment—to account for the time value of money (i.e., the principle that a dollar today, which can be invested and earn a return, is worth more than a dollar in the future). Discount rates that reflect the federal government's cost of financing are used to determine the net present value of estimated cash flows.

Credit subsidy cost for LPO loans is calculated and payment is due at conditional commitment. Projects that have a higher likelihood of default and/or a lower expected recovery rate (in the event of default) carry a higher credit subsidy rate (i.e., credit subsidy cost per dollar of loan). For LPO loans, Congress may appropriate funds to cover the credit subsidy cost.

EXAMPLE: How the credit subsidy cost works in practice

Say the government plans to make a $100, 1-year loan, which the borrower is required to repay with interest at the end of the year.

Assume that for the initial $100 loan, LPO affirms that there is a X% chance of default, and the deal has a Y% recovery rate. This information—along with expected principal and interest repayments over time, facility fees, discount rate, and other relevant cash flow factors—is entered into the OMB Credit Subsidy Calculator, which reports a credit subsidy cost of $10. 

That result is the difference between the value of the loan ($100) and the total amount the government expects to be repaid or recover, accounting for all relevant factors (in this example, $90). A credit subsidy cost of $10 means that the government should budget $10 in expected losses, formally referred to as the “cost of the loan to the government.”

The credit subsidy rate is the result of the credit subsidy cost divided by the total loan obligation. In the example above, the rate would equal 10/100, or 10%.

In reality, LPO’s loans are much more complicated than this example. They are often disbursed in tranches and repaid over time. The credit subsidy cost is calculated in present value using a discount rate based on the loan term. This ensures that the credit subsidy calculation accounts for the time value of money.


Part II: Stating Loan Authority—How Credit Subsidy and Program Design Relate to Available Loan Authority

LPO’s explanation of available loan authority and/or available loan guarantee authority for a program is, depending on the program, the estimated or actual maximum dollar amount that the office could lend through its loan programs. A program’s loan authority and/or loan guarantee authority can be limited by: (1) available appropriations from Congress to cover credit subsidy costs and/or (2) statutory caps on loan authority established by Congress. The program’s structure—and in some cases, the risk associated with loans offered—determines how each lever affects a program’s ability to leverage loan authority and/or loan guarantee authority.1 Additionally, expiration dates on programs and/or appropriated funds may affect LPO’s estimate of the amount it will be able to lend through a given program.

  • Lever 1 - Appropriations for Credit Subsidy Cost: Congress may appropriate funds to LPO to pay credit subsidy costs, which are calculated for each loan or loan guarantee the federal government offers based on factors related to deal risk, loan tenor, and recovery in the event of default. Credit subsidy costs are calculated using a formula from the OMB. 

    Borrower Pay: Under the Title 17 Clean Energy Financing program, Congress authorized borrowers to pay the credit subsidy cost when appropriated funds are exhausted.
  • Lever 2 - Statutory Cap on Total Loan Authority: Through legislation, Congress can establish a ceiling on total loan amounts available under a given program. The office or program may not exceed this amount unless Congress amends the legislation.

For a breakdown of how these levers relate to loan authority across LPO programs, see the table below.

Table 1. How LPO Determines Available Loan Authority by Program

Please refer to the Monthly Application Activity Report for the resulting LPO determination of available loan authority.

Borrower or Pay Allowed?
Congressionally Provided (i.e., “Statutory”) Loan Authority (Total $ Amount or Uncapped)
How LPO Determines Available Loan Authority (statutory or estimated) 
Title 17 Clean Energy Financing – Innovative Energy, Innovative Supply Chain, State Energy Financing Institution-Supported
$89 Billion 
$40 billion of this amount was authorized by the IRA and will expire on September 30, 2026 if uncommitted or unspent. Since the passage of the IRA, LPO has used the time-limited IRA funds.
Statutory cap less amounts obligated for Title 17 Section 1703 projects to date. 
Title 17 Clean Energy Financing – Energy Infrastructure Reinvestment
$250 billion cap
Unused or uncommitted authority expires September 30, 2026.
Estimated based on available credit subsidy, project pipeline and program timeline. 
Advanced Technology Vehicles Manufacturing (ATVM) 
Original $25 billion cap was removed by IRA.
Estimated based on available credit subsidy and project pipeline.
Carbon Dioxide Transportation Infrastructure Finance (CIFIA) 
Estimated based on available credit subsidy and project pipeline.2
Tribal Energy Financing
$20 billion cap 
Original $2 billion cap was increased by IRA.
Statutory, based on available credit subsidy, project pipeline, and statutory cap.
1 LPO discusses available loan authority by program to provide the needed clarity and nuance to the public and to applicants. For current loan authority estimates by program, see “Estimated Remaining Loan Authority” in LPO’s Monthly Application Activity Report.
2 CIFIA is administered in support of DOE’s Office of Fossil Energy & Carbon Management. In addition to providing loans and loan guarantees, the program may also provide grants, which may reduce available loan authority.