National Aluminium Co (BOM:532234) Effective Interest Rate on Debt %: 18.90% (As of Jun. 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

BOM:532234 National Aluminium Co Ltd BOM:532234
80 GF Score
Price ₹367.00
GF Value ₹268.21
Valuation Significantly Overvalued
View Full Analysis

What is National Aluminium Co Effective Interest Rate on Debt %?

National Aluminium Co BOM:532234 -2.52% 80 Effective Interest Rate on Debt % is 18.90% as of Jun. 2026. GuruFocus rates BOM:532234 with a GF Score™ of 80/100 and a GF Value™ of ₹268.21 (Significantly Overvalued).

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. National Aluminium Co's annualized positive value of Interest Expense for the quarter that ended in Jun. 2026 was ₹382 Mil. National Aluminium Co's average total debt for the quarter that ended in Jun. 2026 was ₹2,021 Mil. Therefore, National Aluminium Co's annualized Effective Interest Rate on Debt % for the quarter that ended in Jun. 2026 was 18.90%.


National Aluminium Co  (BOM:532234) Effective Interest Rate on Debt % Explanation

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


National Aluminium Co Effective Interest Rate on Debt % Related Terms


National Aluminium Co Effective Interest Rate on Debt % Historical Data

* Premium members only.

The historical data trend for National Aluminium Co'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.

National Aluminium Co Effective Interest Rate on Debt % Chart

National Aluminium Co Annual Data
Trend Mar17 Mar18 Mar19 Mar20 Mar21 Mar22 Mar23 Mar24 Mar25 Mar26
Effective Interest Rate on Debt %
Get a 7-Day Free Trial Premium Member Only Premium Member Only 13.12 4.49 8.25 20.77 8.87

National Aluminium Co Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
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 10.34 59.84 426.70 -105.37 18.90

BOM:532234 vs AA: Effective Interest Rate on Debt % Comparison

For the Aluminum subindustry, National Aluminium Co'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.


National Aluminium Co Effective Interest Rate on Debt % vs Metals & Mining Industry

For the Metals & Mining industry and Basic Materials sector, National Aluminium Co's Effective Interest Rate on Debt % distribution charts can be found below:

* The bar in red indicates where National Aluminium Co's Effective Interest Rate on Debt % falls into.


BOM:532234
80GF Score
National Aluminium Co Ltd BOM:532234
Effective Interest Rate on Debt % is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

National Aluminium Co Effective Interest Rate on Debt % Calculation

National Aluminium Co's annualized Effective Interest Rate on Debt % for the fiscal year that ended in Mar. 2026 is calculated as

Effective Interest Rate on Debt %
=-1  *  Interest Expense/( (Total Debt  (A: Mar. 2025 )+Total Debt  (A: Mar. 2026 ))/ count )
=-1  *  -227.7/( (3111+2021.1)/ 2 )
=-1  *  -227.7/2566.05
=8.87 %

where

Total Debt  (A: Mar. 2026 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=1946.8 + 74.3
=2021.1

National Aluminium Co's annualized Effective Interest Rate on Debt % for the quarter that ended in Jun. 2026 is calculated as

Effective Interest Rate on Debt %
=-1  *  Interest Expense/( (Total Debt  (Q: Mar. 2026 )+Total Debt  (Q: Jun. 2026 ))/ count )
=-1  *  -382/( (2021.1+0)/ 1 )
=-1  *  -382/2021.1
=18.90 %

where

Total Debt  (Q: Mar. 2026 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=1946.8 + 74.3
=2021.1

* 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 (Jun. 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 18.90% mean?
National Aluminium Co (BOM:532234) has a Effective Interest Rate on Debt % of 18.90% as of Jun. 2026. Effective interest rate on debt is the rate a company actually pays on its debt. View historical data on National Aluminium Co and its competitors.
Is National Aluminium Co's Effective Interest Rate on Debt % too high?
National Aluminium Co's current Effective Interest Rate on Debt % is 18.90%. Overall, National Aluminium Co has a GF Score™ of 80/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does National Aluminium Co's Effective Interest Rate on Debt % compare to AA?
National Aluminium Co's Effective Interest Rate on Debt % of 18.90% can be compared against companies in the Metals & Mining 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 a Metals & Mining company?
A good Effective Interest Rate on Debt % depends on the Metals & Mining 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 National Aluminium Co and its competitors. National Aluminium Co's current Effective Interest Rate on Debt % is 18.90%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is National Aluminium Co stock overvalued right now?
Based on GuruFocus' analysis, National Aluminium Co (BOM:532234) is currently considered Significantly Overvalued. The stock's GF Value™ is ₹268.21, compared to a current price of ₹367.00 — trading 36.8% above its estimated fair value. The current Effective Interest Rate on Debt % is 18.90%. National Aluminium Co's overall GF Score™ is 80/100. 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 National Aluminium Co (BOM:532234), the current Effective Interest Rate on Debt % is 18.90% as of Jun. 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 Aluminium Co (BOM:532234) Overvalued in 2026?

Based on GuruFocus' analysis, National Aluminium Co stock appears to be overvalued. The current stock price of ₹367.00 is trading 36.8% above its estimated GF Value™ of ₹268.21. GuruFocus considers National Aluminium Co to be Significantly Overvalued.

Key valuation signals for BOM:532234:

  • Effective Interest Rate on Debt %: 18.90%
  • GF Value™: ₹268.21 vs. price of ₹367.00 (36.8% above fair value)
  • GF Score™: 80/100

No single metric tells the full story. See the BOM:532234 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


National Aluminium Co Business Description

Other Exchanges NATIONALUM:India
Address Nalco Bhawan, Plot No. P/1, Nayapalli, Bhubaneswar, OR, IND, 751013
National Aluminium Co Ltd mines, produces and sells aluminum and alumina-based products in two segments: Aluminium and Chemicals. The company controls all stages of the aluminum process. The firm mines bauxite and refines it into alumina, then smelts maximum of the alumina into aluminum. The aluminum segment, which generates the majority of revenue, sells aluminum-based products. The chemicals segment sells calcinated alumina and alumina hydrate. The firm also owns and operates multiple power plants throughout India. The company derives maximum revenue from Aluminum segment.
80GF Score

Get the complete analysis for BOM:532234

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

₹367.00
Price
₹268.21
GF Value