Net Interest Margin (Bank Only) % is a measure of the difference between the interest income generated by banks or other financial institutions and the amount of interest paid out to their lenders (for example, deposits), relative to the amount of their interest-earning assets. It is usually calculated as a percentage of what the financial institution earns on loans in a time period and other assets minus the interest paid on borrowed funds divided by the average amount of the assets on which it earned income in that time period (the average earning assets).
GuruFocus calculates Net Interest Margin (Bank Only) % as Net Interest Income (for Banks) divided by its average earning assets. Westpac Banking's annualizedNet Interest Income (for Banks) for the quarter that ended in Mar. 2026 was $13,714 Mil. Westpac Banking's average earning assets for the quarter that ended in Mar. 2026 was $715,344 Mil. Therefore, Westpac Banking's annualized Net Interest Margin (Bank Only) % for the quarter that ended in Mar. 2026 was 1.92%.
Westpac Banking (OTCPK:WBKCY) Net Interest Margin (Bank Only) % Explanation
The negative value of Net Interest Margin (Bank Only) % mean the firm pays more interest for its debt than the interest revenue generated from its investment.
Westpac Banking Net Interest Margin (Bank Only) % Related Terms
Westpac Banking Net Interest Margin (Bank Only) % Historical Data
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The historical data trend for Westpac Banking's Net Interest Margin (Bank Only) % 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.
Westpac Banking Net Interest Margin (Bank Only) % Chart
WBKCY vs JPM, BAC, WFC: Net Interest Margin (Bank Only) % Comparison
For the Banks - Diversified subindustry, Westpac Banking's Net Interest Margin (Bank Only) %, along with its competitors' market caps and Net Interest Margin (Bank Only) % 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.
Westpac Banking Net Interest Margin (Bank Only) % vs Banks Industry
For the Banks industry and Financial Services sector, Westpac Banking's Net Interest Margin (Bank Only) % distribution charts can be found below:
* The bar in red indicates where Westpac Banking's Net Interest Margin (Bank Only) % falls into.
Westpac Banking Net Interest Margin (Bank Only) % Calculation
Net Interest Margin (Bank Only) % (NIM) is a measure of the difference between the interest income generated by banks or other financial institutions and the amount of interest paid out to their lenders (for example, deposits), relative to the amount of their interest-earning assets. It is usually calculated as a percentage of what the financial institution earns on loans in a time period and other assets minus the interest paid on borrowed funds divided by the average amount of the assets on which it earned income in that time period (the average earning assets).
Westpac Banking's annualized Net Interest Margin (Bank Only) % for the fiscal year that ended in Sep. 2025 is calculated as
* 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 Net Interest Margin (Bank Only) %, the Net Interest Income (for Banks) of the last fiscal year and the average earning assets over the fiscal year are used. In calculating the quarterly data,
the Net Interest Income (for Banks) data used here is two times the semi-annual (Mar. 2026) net interest income data.
Net Interest Margin (Bank Only) % is displayed in the 30-year financial page for Banks.
What does a Net Interest Margin (Bank Only) % of 1.92% mean?
Westpac Banking (WBKCY) has a Net Interest Margin (Bank Only) % of 1.92% as of Mar. 2026. Net interest margin is the ratio of a bank's net interest income to its average two-period earning assets. View historical data on Westpac Banking and its competitors.
Is Westpac Banking's Net Interest Margin (Bank Only) % too high?
Westpac Banking's current Net Interest Margin (Bank Only) % is 1.92%. Overall, Westpac Banking has a GF Score™ of 46/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Westpac Banking's Net Interest Margin (Bank Only) % compare to JPM and BAC?
Westpac Banking's Net Interest Margin (Bank Only) % of 1.92% can be compared against companies in the Banks industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Net Interest Margin (Bank Only) % for a Banks company?
A good Net Interest Margin (Bank Only) % depends on the Banks industry context. However, Net Interest Margin (Bank Only) % 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 Net Interest Margin (Bank Only) % mean?
A high Net Interest Margin (Bank Only) % can signal that a stock is expensive relative to its fundamentals. Net interest margin is the ratio of a bank's net interest income to its average two-period earning assets. View historical data on Westpac Banking and its competitors. Westpac Banking's current Net Interest Margin (Bank Only) % is 1.92%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Westpac Banking stock overvalued right now?
Based on GuruFocus' analysis, Westpac Banking (WBKCY) is currently considered Fairly Valued. The stock's GF Value™ is $50.87, compared to a current price of $51.67 — trading 1.6% above its estimated fair value. The current Net Interest Margin (Bank Only) % is 1.92%. Westpac Banking's overall GF Score™ is 46/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Net Interest Margin (Bank Only) % calculated?
Net Interest Margin (Bank Only) % is calculated from a company's financial statements. For Westpac Banking (WBKCY), the current Net Interest Margin (Bank Only) % is 1.92% 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 Westpac Banking (WBKCY) Overvalued in 2026?
Based on GuruFocus' analysis, Westpac Banking stock appears to be overvalued.
The current stock price of $51.67 is trading 1.6% above its estimated GF Value™ of $50.87.
GuruFocus considers Westpac Banking to be Fairly Valued.
Key valuation signals for WBKCY:
Net Interest Margin (Bank Only) %: 1.92%
GF Value™: $50.87 vs. price of $51.67 (1.6% above fair value)
No single metric tells the full story. See the WBKCY stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Westpac is Australia's oldest bank and financial services group, with a significant franchise in Australia and New Zealand in the consumer, small business, corporate, and institutional sectors, in addition to its major presence in wealth management. Westpac is among a handful of banks around the globe currently retaining very high credit ratings. The bank benefits from a large national branch network and significant market share, particularly in home loans and retail deposits.
46GF Score
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