NGG (National Grid) Interest Income: $506 Mil (TTM As of Mar. 2026)

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NGG National Grid PLC NGG
72 GF Score
Price $81.29
GF Value $50.97
Valuation Significantly Overvalued
! 4 Warning Signs
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What is National Grid Interest Income?

National Grid NGG +0.30% 72 Interest Income is $506 Mil as of Mar. 2026. GuruFocus rates NGG with a GF Score™ of 72/100 and a GF Value™ of $50.97 (Significantly Overvalued). The stock has 4 warning signs investors should review.

Interest Income is the interest earned on cash temporarily held in savings accounts, certificates of deposits, or other investments. National Grid's interest income for the six months ended in Mar. 2026 was $228 Mil. Its interest income for the trailing twelve months (TTM) ended in Mar. 2026 was $506 Mil.

National Grid Interest Income Historical Data

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The historical data trend for National Grid's Interest Income 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.

National Grid Interest Income Chart

National Grid Annual Data
Trend Mar17 Mar18 Mar19 Mar20 Mar21 Mar22 Mar23 Mar24 Mar25 Mar26
Interest Income
Get a 7-Day Free Trial Premium Member Only Premium Member Only 56.65 200.24 303.69 567.18 502.67

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 Income 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 147.40 305.56 268.73 278.38 228.00
NGG
72GF Score
National Grid PLC NGG
Interest Income is just one metric. See GF Score™, valuation, warning signs, and more.
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National Grid Interest Income Calculation

Interest Income is the interest earned on cash temporarily held in savings accounts, certificates of deposits, or other investments.

Interest Income 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 $506 Mil.

* 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.

Frequently Asked Questions Learn more about Interest Income →
What does a Interest Income of $506 Mil mean?
National Grid (NGG) has a Interest Income of $506 Mil as of Mar. 2026. Interest Income is the amount a company receives on savings accounts and certificates of deposits. View historical data on National Grid and its competitors.
Is National Grid's Interest Income too high?
National Grid's current Interest Income is $506 Mil. Overall, National Grid has a GF Score™ of 72/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does National Grid's Interest Income compare to NEE and SO?
National Grid's Interest Income of $506 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 Income for an Utilities - Regulated company?
A good Interest Income depends on the Utilities - Regulated industry context. However, Interest Income 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 Income mean?
A high Interest Income can signal that a stock is expensive relative to its fundamentals. Interest Income is the amount a company receives on savings accounts and certificates of deposits. View historical data on National Grid and its competitors. National Grid's current Interest Income is $506 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 (NGG) is currently considered Significantly Overvalued. The stock's GF Value™ is $50.97, compared to a current price of $81.29 — trading 59.5% above its estimated fair value. The current Interest Income is $506 Mil. National Grid's overall GF Score™ is 72/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Interest Income calculated?
Interest Income is calculated from a company's financial statements. For National Grid (NGG), the current Interest Income is $506 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 (NGG) Overvalued in 2026?

Based on GuruFocus' analysis, National Grid stock appears to be overvalued. The current stock price of $81.29 is trading 59.5% above its estimated GF Value™ of $50.97. GuruFocus considers National Grid to be Significantly Overvalued.

Key valuation signals for NGG:

  • Interest Income: $506 Mil
  • GF Value™: $50.97 vs. price of $81.29 (59.5% above fair value)
  • GF Score™: 72/100 with 4 warning signs

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

National Grid Business Description

Address 1-3 Strand, London, GBR, WC2N 5EH
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.
72GF Score

Get the complete analysis for NGG

Interest Income is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

$81.29
Price
$50.97
GF Value