Plug Power (WBO:PLUG) Effective Interest Rate on Debt %: 6.96% (As of Mar. 2026)


WBO:PLUG Plug Power Inc WBO:PLUG
38 GF Score
Price €1.97
GF Value €1.28
Valuation Significantly Overvalued
! 6 Warning Signs
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What is Plug Power Effective Interest Rate on Debt %?

Plug Power WBO:PLUG -5.66% 38 Effective Interest Rate on Debt % is 6.96% as of Mar. 2026. GuruFocus rates WBO:PLUG with a GF Score™ of 38/100 and a GF Value™ of €1.28 (Significantly Overvalued). The stock has 6 warning signs investors should review.

Effective Interest Rate on Debt % is the usage rate that a borrower actually pays on a debt. It is calculated as the positive value of Interest Expense divided by its average total debt. Total debt equals to Long-Term Debt & Capital Lease Obligation plus Short-Term Debt & Capital Lease Obligation. Plug Power's annualized positive value of Interest Expense for the quarter that ended in Mar. 2026 was €60.0 Mil. Plug Power's average total debt for the quarter that ended in Mar. 2026 was €862.7 Mil. Therefore, Plug Power's annualized Effective Interest Rate on Debt % for the quarter that ended in Mar. 2026 was 6.96%.


Plug Power  (WBO:PLUG) Effective Interest Rate on Debt % Explanation

Effective Interest Rate on Debt % measures the usage rate that a borrower actually pays on a debt.


Plug Power Effective Interest Rate on Debt % Related Terms


Plug Power Effective Interest Rate on Debt % Historical Data

* Premium members only.

The historical data trend for Plug Power's Effective Interest Rate on Debt % can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Plug Power Effective Interest Rate on Debt % Chart

Plug Power Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Effective Interest Rate on Debt %
Get a 7-Day Free Trial Premium Member Only Premium Member Only 6.50 4.71 4.77 4.64 5.91

Plug Power Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Effective Interest Rate on Debt % Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 4.38 6.24 6.58 8.56 6.96

WBO:PLUG vs HAYW, ATKR, TE: Effective Interest Rate on Debt % Comparison

For the Electrical Equipment & Parts subindustry, Plug Power's Effective Interest Rate on Debt %, along with its competitors' market caps and Effective Interest Rate on Debt % data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.


Plug Power Effective Interest Rate on Debt % vs Industrial Products Industry

For the Industrial Products industry and Industrials sector, Plug Power's Effective Interest Rate on Debt % distribution charts can be found below:

* The bar in red indicates where Plug Power's Effective Interest Rate on Debt % falls into.


WBO:PLUG
38GF Score
Plug Power Inc WBO:PLUG
Effective Interest Rate on Debt % is just one metric. See GF Score™, valuation, warning signs, and more.
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Plug Power Effective Interest Rate on Debt % Calculation

Plug Power's annualized Effective Interest Rate on Debt % for the fiscal year that ended in Dec. 2025 is calculated as

Effective Interest Rate on Debt %
=-1  *  Interest Expense/( (Total Debt  (A: Dec. 2024 )+Total Debt  (A: Dec. 2025 ))/ count )
=-1  *  -55.618/( (1030.097+851.585)/ 2 )
=-1  *  -55.618/940.841
=5.91 %

where

Total Debt  (A: Dec. 2024 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=813.885 + 216.212
=1030.097

Total Debt  (A: Dec. 2025 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=714.339 + 137.246
=851.585

Plug Power's annualized Effective Interest Rate on Debt % for the quarter that ended in Mar. 2026 is calculated as

Effective Interest Rate on Debt %
=-1  *  Interest Expense/( (Total Debt  (Q: Dec. 2025 )+Total Debt  (Q: Mar. 2026 ))/ count )
=-1  *  -60.036/( (851.585+873.8)/ 2 )
=-1  *  -60.036/862.6925
=6.96 %

where

Total Debt  (Q: Dec. 2025 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=714.339 + 137.246
=851.585

Total Debt  (Q: Mar. 2026 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=750.462 + 123.338
=873.8

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

In the calculation of annual Effective Interest Rate on Debt %, the Interest Expense of the last fiscal year and the average total debt over the fiscal year are used. In calculating the quarterly data, the Interest Expense data used here is four times the quarterly (Mar. 2026) interest expense data. Effective Interest Rate on Debt % is displayed in the 30-year financial page.

What does a Effective Interest Rate on Debt % of 6.96% mean?
Plug Power (WBO:PLUG) has a Effective Interest Rate on Debt % of 6.96% as of Mar. 2026. Effective interest rate on debt is the rate a company actually pays on its debt. View historical data on Plug Power and its competitors.
Is Plug Power's Effective Interest Rate on Debt % too high?
Plug Power's current Effective Interest Rate on Debt % is 6.96%. Overall, Plug Power has a GF Score™ of 38/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Plug Power's Effective Interest Rate on Debt % compare to HAYW and ATKR?
Plug Power's Effective Interest Rate on Debt % of 6.96% can be compared against companies in the Industrial Products industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Effective Interest Rate on Debt % for an Industrial Products company?
A good Effective Interest Rate on Debt % depends on the Industrial Products industry context. However, Effective Interest Rate on Debt % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Effective Interest Rate on Debt % mean?
A high Effective Interest Rate on Debt % can signal that a stock is expensive relative to its fundamentals. Effective interest rate on debt is the rate a company actually pays on its debt. View historical data on Plug Power and its competitors. Plug Power's current Effective Interest Rate on Debt % is 6.96%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Plug Power stock overvalued right now?
Based on GuruFocus' analysis, Plug Power (WBO:PLUG) is currently considered Significantly Overvalued. The stock's GF Value™ is €1.28, compared to a current price of €1.97 — trading 54.1% above its estimated fair value. The current Effective Interest Rate on Debt % is 6.96%. Plug Power's overall GF Score™ is 38/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Effective Interest Rate on Debt % calculated?
Effective Interest Rate on Debt % is calculated from a company's financial statements. For Plug Power (WBO:PLUG), the current Effective Interest Rate on Debt % is 6.96% as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.

Is Plug Power (WBO:PLUG) Overvalued in 2026?

Based on GuruFocus' analysis, Plug Power stock appears to be overvalued. The current stock price of €1.97 is trading 54.1% above its estimated GF Value™ of €1.28. GuruFocus considers Plug Power to be Significantly Overvalued.

Key valuation signals for WBO:PLUG:

  • Effective Interest Rate on Debt %: 6.96%
  • GF Value™: €1.28 vs. price of €1.97 (54.1% above fair value)
  • GF Score™: 38/100 with 6 warning signs

No single metric tells the full story. See the WBO:PLUG stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Plug Power Business Description

Address 125 Vista Boulevard, Slingerlands, NY, USA, 12159
Plug Power Inc is building an end-to-end green hydrogen ecosystem, from production, storage, and delivery to energy generation. The company plans to build and operate green hydrogen highways across North America and Europe. Plug will deliver its green hydrogen solutions directly to its customers and through joint venture partners into multiple end markets, including material handling, e-mobility, power generation, and industrial applications.
38GF Score

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Effective Interest Rate on Debt % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€1.97
Price
€1.28
GF Value