National Australia Bank (ASX:NAB) is one of Australia's major banks, serving consumer, Business and institutional customers across Australia and New Zealand, with a particular focus on business lending. Its third-quarter FY26 trading update showed broadly steady underlying earnings, slightly softer net interest Margin and higher operating expenses, placing greater focus on cost discipline, productivity savings and Credit quality ahead of the full-year result.

Third-Quarter Cash Earnings Remain Steady

NAB reported unaudited cash earnings of $1.83 billion for the third quarter of FY26.

This was approximately 2 per cent above the first-half quarterly average after excluding a large notable item.

Revenue increased by around 2 per cent compared with the first-half quarterly average, indicating continued income growth despite a modest decline in net interest margin.

Net interest margin was 1.79 per cent, down two basis points.

Net interest margin measures the difference between interest earned on loans and other Assets and interest paid on deposits and funding, relative to interest-earning assets. It is therefore a central measure of banking profitability.

The modest decline in margin indicates that competitive and funding pressures remained present even as Revenue continued to grow.

Costs Remain an Important FY26 Focus

Operating expenses, excluding the large notable item, increased by around 4 per cent compared with the first-half quarterly average.

NAB is targeting productivity savings of more than $450 million for FY26.

Management also expects full-year expense growth to remain below the previous year's 4.6 per cent increase.

The third-quarter expense trend therefore leaves limited room for further cost acceleration if that full-year objective is to be achieved.

Productivity savings are important because banks face ongoing expenditure across technology, regulation, cybersecurity, staffing and customer service.

For National Australia Bank (ASX:NAB), controlling these costs while continuing to invest in the business will be an important determinant of FY26 profitability.

Business Lending Continues to Grow

Australian business lending increased by approximately 2 per cent during the quarter.

Within this, Business and Private Banking lending increased by around 4 per cent.

This growth is particularly relevant for NAB because business banking is a major part of its operating model and competitive positioning.

Home lending grew broadly in line with the banking system, while deposits increased by approximately 2 per cent.

Growth in deposits is important because customer deposits provide a key source of funding for loans.

The balance between lending growth and deposit growth also affects funding costs and, ultimately, net interest margin.

Half-Year Results Provide Context for the Update

The third-quarter trading update followed NAB's half-year result for the six months ended 31 March 2026.

Reported cash earnings for the half were $2,639 million, down 24.8 per cent from the second half of 2025 because of large notable items.

Excluding those items, cash earnings increased by 2.3 per cent.

Statutory net profit for the half was $2,750 million.

Cash Return on Equity was 8.5 per cent, or 11.6 per cent excluding large notable items.

Return on equity measures profit generated relative to Shareholder equity and is an important indicator of banking profitability.

The half-year net interest margin was 1.81 per cent, up three basis points.

The third-quarter margin of 1.79 per cent therefore represented some moderation from the half-year level.

Dividend Position Remains Incomplete for FY26

NAB declared a fully franked interim Dividend of 85 cents per share, which was paid on 2 July 2026.

A final dividend for FY26 has not yet been declared.

The full-year result will therefore provide the next update on shareholder distributions.

Dividend decisions will depend on earnings, Capital requirements, credit conditions and the board's assessment of the bank's financial position.

The final dividend will also provide further insight into how NAB is balancing capital returns with the need to preserve flexibility during a period of elevated economic uncertainty.

Capital Ratio Strengthens During the Quarter

NAB's Level 2 common equity tier one ratio was 11.93 per cent at the end of the third quarter.

This compared with 11.65 per cent at 31 March 2026.

Common equity tier one capital represents the highest-quality form of regulatory capital and provides a buffer against losses.

The increase suggests that NAB maintained a solid capital position during the quarter.

Capital strength remains important because it supports lending growth, dividends and the bank's ability to absorb unexpected credit losses.

Future movements in the ratio will depend on earnings, risk-weighted asset growth, dividend payments and regulatory requirements.

Credit Impairment Charges Moderate

The quarterly credit impairment charge was $299 million.

This was lower than the $706 million recorded during the first half of FY26.

Credit impairment charges represent provisions for expected Loan losses and are an important indicator of changing credit conditions.

The decline in the third quarter suggests less impairment pressure during that period, although credit costs can vary significantly from quarter to quarter.

Management has highlighted pressures facing business customers, including elevated fuel costs, Supply disruption, Inflation and higher interest rates.

These factors could affect repayment capacity if economic conditions weaken.

Margin Pressure Remains a Key Risk

Competition for mortgages and deposits remains one of the most significant risks to NAB's net interest margin.

Banks may need to offer more competitive lending rates to attract borrowers while simultaneously paying more for deposits to retain customer funding.

This can compress the spread between interest income and funding costs.

Any changes in wholesale funding conditions could add further pressure.

For NAB, maintaining discipline in lending and deposit pricing will therefore remain important in protecting profitability.

The direction of interest rates will also influence both customer behaviour and the bank's funding and lending economics.

Cost Delivery Will Matter Into Year-End

The quarterly increase in expenses places additional emphasis on the bank's FY26 productivity programme.

NAB is targeting more than $450 million of savings while aiming to keep overall expense growth below the prior year's 4.6 per cent increase.

Achieving this requires savings initiatives to offset inflation, wage pressure and Investment spending.

If cost growth remains elevated, it could limit the benefit of revenue growth.

The relationship between income and expenses will therefore be one of the most important measures in the FY26 full-year result.

What to Watch in the FY26 Full-Year Result

NAB's financial year ended on 30 September 2026, making the full-year result the next major financial update.

Investors will be able to assess whether the net interest margin stabilised after the third-quarter decline to 1.79 per cent.

Expense growth will also be important, particularly whether it remained below the prior year's 4.6 per cent increase and whether the bank delivered more than $450 million in productivity savings.

Other areas to watch include business lending growth, deposit trends, credit impairment charges and the Level 2 common equity tier one ratio.

The final dividend declaration will provide another measure of earnings and capital strength.

For National Australia Bank (ASX:NAB), the third-quarter update showed broadly steady earnings and continued lending growth, but the full-year result will provide a clearer test of whether cost control and margin management remained on track through the end of FY26.