NGGTF (National Grid) Interest Expense: $-2,215 Mil (TTM As of Mar. 2026)

What is National Grid Interest Expense?

National Grid NGGTF +1.90% 73 Interest Expense is $-2,215 Mil as of Mar. 2026. GuruFocus rates NGGTF with a GF Score™ of 73/100 and a GF Value™ of $10.07 (Significantly Overvalued). The stock has 5 warning signs investors should review.

Interest Expense is the amount reported by a company or individual as an expense for borrowed money. National Grid's interest expense for the six months ended in Mar. 2026 was $ -1,020 Mil. Its interest expense for the trailing twelve months (TTM) ended in Mar. 2026 was $-2,215 Mil.

Interest Coverage is a ratio that determines how easily a company can pay interest expenses on outstanding debt. It is calculated by dividing a company's Operating Income(EBIT) by its Interest Expense. National Grid's Operating Income for the six months ended in Mar. 2026 was $ 5,433 Mil. National Grid's Interest Expense for the six months ended in Mar. 2026 was $ -1,020 Mil. National Grid's Interest Coverage for the quarter that ended in Mar. 2026 was 5.33. The higher the ratio, the stronger the company's financial strength is. Note: If both Interest Expense and Interest Income are empty, while Net Interest Income is negative, then use Net Interest Income as Interest Expense.

National Grid (OTCPK:NGGTF) Interest Expense Explanation

Note: If both Interest Expense and Interest Income are empty, while Net Interest Income is negative, then use Net Interest Income as Interest Expense.

National Grid's Interest Expense for the six months ended in Mar. 2026 was $-1,020 Mil. Its Operating Income for the six months ended in Mar. 2026 was $5,433 Mil. And its Long-Term Debt & Capital Lease Obligation for the six months ended in Mar. 2026 was $57,140 Mil.

National Grid's Interest Coverage for the quarter that ended in Mar. 2026 is calculated as

Interest Coverage	=	-1	*	Operating Income (Q: Mar. 2026 )	/	Interest Expense (Q: Mar. 2026 )
	=	-1	*	5433.333	/	-1020
	=	5.33

* 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.

The higher the ratio, the stronger the company's financial strength is.

National Grid Interest Expense Historical Data

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The historical data trend for National Grid's Interest Expense can be seen below:

National Grid Interest Expense Chart

National Grid Annual Data

Trend

Mar17

Mar18

Mar19

Mar20

Mar21

Mar22

Mar23

Mar24

Mar25

Mar26

Interest Expense

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-1,524.37

-2,038.84

-2,189.33

-2,338.50

-2,198.67

National Grid Semi-Annual Data
	Sep16	Mar17	Sep17	Mar18	Sep18	Mar19	Sep19	Mar20	Sep20	Mar21	Sep21	Mar22	Sep22	Mar23	Sep23	Mar24	Sep24	Mar25	Sep25	Mar26
Interest Expense	Get a 7-Day Free Trial															-1,129.61	-1,191.80	-1,174.42	-1,194.60	-1,020.00

73GF Score

National Grid PLC NGGTF

Interest Expense is just one metric. See GF Score™, valuation, warning signs, and more.

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National Grid Interest Expense Calculation

Interest Expense is the amount reported by a company or individual as an expense for borrowed money.

Interest Expense for the trailing twelve months (TTM) ended in Mar. 2026 adds up the semi-annually data reported by the company within the most recent 12 months, which was $-2,215 Mil.

Frequently Asked Questions Learn more about Interest Expense →

What does a Interest Expense of $-2,215 Mil mean?

National Grid (NGGTF) has a Interest Expense of $-2,215 Mil as of Mar. 2026. Interest Expense is the amount a company pays on its long-term debt. View historical data on National Grid and its competitors.

Is National Grid's Interest Expense too high?

National Grid's current Interest Expense is $-2,215 Mil. Overall, National Grid has a GF Score™ of 73/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.

How does National Grid's Interest Expense compare to NEE and SO?

National Grid's Interest Expense of $-2,215 Mil can be compared against companies in the Utilities - Regulated industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.

What is a good Interest Expense for an Utilities - Regulated company?

A good Interest Expense depends on the Utilities - Regulated industry context. However, Interest Expense 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 Interest Expense mean?

A high Interest Expense can signal that a stock is expensive relative to its fundamentals. Interest Expense is the amount a company pays on its long-term debt. View historical data on National Grid and its competitors. National Grid's current Interest Expense is $-2,215 Mil. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.

Is National Grid stock overvalued right now?

Based on GuruFocus' analysis, National Grid (NGGTF) is currently considered Significantly Overvalued. The stock's GF Value™ is $10.07, compared to a current price of $16.58 — trading 64.7% above its estimated fair value. The current Interest Expense is $-2,215 Mil. National Grid's overall GF Score™ is 73/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.

How is Interest Expense calculated?

Interest Expense is calculated from a company's financial statements. For National Grid (NGGTF), the current Interest Expense is $-2,215 Mil 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 National Grid (NGGTF) Overvalued in 2026?

Based on GuruFocus' analysis, National Grid stock appears to be overvalued. The current stock price of $16.58 is trading 64.7% above its estimated GF Value™ of $10.07. GuruFocus considers National Grid to be Significantly Overvalued.

Key valuation signals for NGGTF:

Interest Expense: $-2,215 Mil
GF Value™: $10.07 vs. price of $16.58 (64.7% above fair value)
GF Score™: 73/100 with 5 warning signs

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

National Grid Business Description

Industry Utilities Utilities - Regulated

Comparable Companies LSE:JEL NEE SO DUK AEP D ETR XEL EXC XMAD:ELE PEG ED WEC PCG BOM:532555 AEE DTE XPRA:CEZ TSX:FTS CNP

Other Exchanges NGG:USA NGl:UK NG.:UK NNGF:Germany N1GG34:Brazil NGG:Argentina

Address 1-3 Strand, London, GBR, WC2N 5EH

Website https://www.nationalgrid.com

National Grid owns and operates the electric transmission system in England and Wales. It sold the bulk of its UK gas transmission business in fiscal 2023 to fund the acquisition of PPL's UK power distribution assets. In the Northeastern United States, it serves electricity and gas customers combined in three states. It also owns regulated transmission electricity networks in the United States, metering services and merchant transmission lines in the UK.

73GF Score

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$16.58

Price

$10.07

GF Value

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