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Appraisal methodology for solar and wind energy projects

A Stipulation of Discontinuance in Matter of Town of Blenheim et al v Hiller was so ordered by the court on May 5, 2023. The discontinuance of that proceeding means that the temporary restraining order issued on April 29, 2022, is no longer in effect.

The Stipulation of Discontinuance is a result of the enactment of Part N of Chapter 59 of the Laws of 2023. In accordance with section 3 of Part N, the Department of Taxation and Finance is hereby readopting the 2022 appraisal models and discount rates for use in 2023. Assessors seeking guidance regarding Part N, the discontinuance of Matter of Town of Blenheim et al v Hiller, and the Tax Department’s readoption of the models for use in 2023 should contact their municipal attorneys.

 The 2021-2022 Enacted State Budget established a process for the New York State Department of Taxation and Finance to develop a standard appraisal methodology for solar and wind energy systems with a nameplate capacity equal to or greater than one megawatt.

The Tax Department—in consultation with the New York State Energy Research and Development Authority (NYSERDA) and the New York State Assessors Association (NYSAA)—will annually develop:

Beginning with 2022 assessment rolls, local assessors are required to use the model and discount rates to value and place assessments on affected solar and wind energy systems.

Note: Municipalities will continue to have the flexibility to negotiate payment in lieu of taxes (PILOT) agreements.

Discount rates

The discount rates below are based on the economic principle of weighted average cost of capital (WACC). The cost of capital is a forward-looking measure comprised of the time value of money and investor risk. It takes into account the expected rate of return that market participants require to attract funds to a particular investment. The cost of capital is synonymous with the discount rate that is typically used in renewable energy discounted cash flow analysis.

The discount rates are separated into three distinct categories based on investment risk associated with system type and size.

Discount rates
Large-scale solar (pre-tax, 5 megawatts and larger)
Weighting Cost Weighted cost
Weighted cost of debt 0.519 4.00% 2.08%
Weighted cost of equity 0.481 10.58% 5.09%
Base discount rate per WACC 7.16%
VDER1 Solar (pre-tax, 1-5 megawatts)
Weighting Cost Weighted cost
Weighted cost of debt 0.300 4.50% 1.35%
Weighted cost of equity 0.700 9.50% 6.65%
Base discount rate per WACC 8.00%
Wind (pre-tax, 1 megawatt and larger)
Weighting Cost Weighted cost
Weighted cost of debt 0.316 4.00% 1.26%
Weighted cost of equity 0.684 12.28% 8.40%
Base discount rate per WACC 9.66%

VDER = Value of Distributed Energy Resources

Note: The rates specified above are before-tax discount rates. These rates will be combined with the local full-value property tax rates before use in the Solar and Wind Appraisal Model.

Solar and Wind Appraisal Model

The Tax Department consulted with the following entities as it developed the appraisal model: 

  • Alliance for Clean Energy
  • New York State Economic Development Council
  • renewable energy developers

Following a 60-day comment period, the Tax Department reviewed all of the comments received and adjusted the model appropriately.

Note: The model utilizes earnings before interest, taxes, depreciation, and amortization (EBITDA).

For more information

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Discounted Cash Flow (DCF) is a valuation method used to estimate the value of an investment based on its expected future cash flows. The analysis projects how much money an investment will generate in the future, and then discounts that cash flow to arrive at an estimated current value of the investment.