AU Small Finance Bank vs Federal Bank (2026): Growth, ROA, NPAs, Valuation & Which Is Better?
AU Small Finance Bank and Federal Bank were each worth roughly ₹80,000 crore in Bull Run's August 2026 snapshot. Federal owns almost twice as many deposits and loans. AU earns much more from every rupee of assets.
This creates one of the cleanest mid-cap bank comparisons in India.
Are investors better served owning more banking assets at a cheaper price?
Or fewer assets growing faster and earning higher returns?
AU Bank vs Federal Bank: Q1 FY2027 scoreboard
| Metric | AU Small Finance Bank | Federal Bank | Current Edge |
|---|---|---|---|
| Q1 PAT | ₹796 Cr | ₹1,176.9 Cr | Federal absolute |
| PAT growth | +37% | +36.6% | Essentially tied |
| NII | ₹2,695 Cr | ₹2,945.9 Cr | Federal slightly |
| NII growth | +32% | +26.1% | AU |
| NIM | 5.90% | 3.33% | AU |
| Deposits | ₹1,57,727 Cr | ₹3,20,118 Cr | Federal |
| Deposit growth | +24% | +11.37% | AU |
| CASA ratio | 29% | 32.23% | Federal |
| Loans / advances | ₹1,44,250 Cr gross loans | ₹2,81,240 Cr gross advances | Federal |
| Loan growth | +23% | +14.94% | AU |
| Cost of funds / deposits | 6.48% cost of funds | 5.21% cost of deposits | Federal funding cost |
| Cost-to-income | ~56.6% | 52.50% | Federal |
| GNPA | 2.10% | 1.52% | Federal |
| NNPA | 0.76% | 0.18% | Federal |
| Provision coverage | 85% | 87.37% excluding technical write-offs | Federal |
| Credit cost | 0.8% incl. CGFMU premium | 0.41% | Federal |
| ROA | 1.70% | 1.22% | AU |
| ROE | 15.60% | 12.01% | AU |
| Capital adequacy | 18.9% | Comfortable growth capital | AU disclosed ratio |
| Tier 1 | 17.1% | Strong capitalised franchise | Both adequately capitalised |
| Late-August P/E | ~28.3x | ~18.15x | Federal |
| Late-August P/B | ~3.94x | ~2.14x | Federal |
AU's smaller balance sheet earns a much wider spread
NIM of 5.9% versus Federal's 3.33% explains much of the market's willingness to pay a premium.
That margin difference is approximately 257 basis points.
In banking, 257 basis points is enormous.
Federal needs almost twice the balance sheet partly because each rupee of assets produces less interest spread.
Why is AU's NIM so high?
The portfolio contains a much larger share of granular higher-yield lending.
AU's business was built around:
- Vehicle finance.
- Small businesses.
- Rural borrowers.
- Commercial finance.
- Mortgages.
- Gold loans.
These products can earn higher yields than prime corporate lending.
They also require much more intensive underwriting, collections and local-market knowledge.
Federal operates closer to traditional universal-bank economics
Its lending mix includes large corporate, commercial, mortgages, vehicles, gold, business banking and consumer products.
A broader universal-bank balance sheet typically earns a lower blended yield.
It can compensate through:
- Cheaper deposits.
- Fee income.
- Larger scale.
- Better asset quality.
- Lower operating cost per rupee of assets.
Federal's cheaper funding is visible immediately
Cost of deposits was approximately 5.21%.
AU's cost of funds was approximately 6.48%.
These are not perfectly identical definitions.
The difference is still directionally large.
AU must earn much higher asset yields merely to compensate for the more expensive funding base.
AU currently does more than compensate
Even after higher funding cost, NIM remains 5.9%.
That is why the business can generate 1.7% ROA despite:
- Higher credit costs.
- Higher NPAs.
- A slightly higher operating-cost ratio.
The real question is whether that spread survives as AU becomes larger
Growth changes bank economics.
Early growth can focus on niches where a lender has unusual pricing power.
As the balance sheet expands nationally, new assets often enter larger and more competitive categories.
That can reduce NIM even while absolute earnings grow.
Universal-bank transition could accelerate exactly that change
AU has received RBI's in-principle approval and submitted its final application for a universal banking licence.
Final approval remains pending as of August 31, 2026.
If completed, the transition can eventually broaden AU's competitive field.
The bank could pursue more of:
- Corporate banking.
- Transaction banking.
- Trade services.
- International business.
- Affluent banking.
The danger is believing universal banking means higher NIM
It may mean the opposite.
Large corporate loans typically price at thinner spreads.
The economic benefit comes through larger balances, fee relationships and diversification.
AU could become a better bank even if NIM falls from 5.9%.
The correct metric is whether ROA and ROE remain strong.
AU currently has the faster growth engine by a wide margin
Deposits increased 24% versus Federal at 11.4%.
Loans increased 23% versus Federal at 14.9%.
NII increased 32% versus Federal at 26.1%.
This is the central reason AU trades at the higher multiple.
AU is growing both sides of the balance sheet at almost the same speed
23% loan growth and 24% deposit growth is a healthy funding equation.
The bank is not currently forcing asset growth ahead of liability growth.
That reduces the risk that rapid lending immediately creates a funding squeeze.
Federal's funding equation is less balanced
Advances grew 14.9% while deposits grew 11.4%.
The difference is manageable.
Federal has a large deposit franchise and is improving CASA.
It still needs liabilities to keep pace if mid-teens lending growth continues.
Federal's asset quality is in another league
NNPA is only 0.18%.
AU's is 0.76%.
Federal GNPA is 1.52% versus AU at 2.10%.
Federal also reported falling fresh slippages and very high provision coverage.
This is not a cosmetic difference
A 5.9% NIM bank with higher credit losses can ultimately earn less than a 3.3% NIM bank with exceptional credit quality.
That is why investors should compare:
NIM – credit cost – operating cost.
rather than NIM alone.
Federal currently loses only 0.41% to credit cost
AU's Q1 credit cost including CGFMU premium was approximately 0.8%.
The difference is close to 40 basis points.
That absorbs part of AU's enormous NIM advantage.
AU's credit cost is improving fast
The 0.8% level was down from approximately 1.4% a year earlier.
Slippages declined 22%.
This is one reason Q1 PAT increased 37%.
If the improvement proves structural, AU can preserve high ROA even if margins eventually normalise lower.
Federal has already reached the clean-book stage
Its challenge is no longer balance-sheet repair.
It is pushing ROA higher through:
- Better asset mix.
- Higher fee income.
- CASA growth.
- Lower funding cost.
- Operating efficiency.
Federal's NII growth is much faster than its loan growth
NII increased 26.1% while gross advances grew 14.9%.
That demonstrates improving balance-sheet monetisation.
NIM increased 39 basis points year on year to 3.33%.
Cost of deposits declined.
Fee income also increased more than 20%.
Federal therefore should not be dismissed as a low-growth bank
Its balance sheet grows more slowly than AU's, but earnings growth is currently almost identical.
AU PAT +37%.
Federal PAT +36.6%.
Federal is generating nearly the same profit growth from slower asset expansion.
That is operating quality.
Federal also generates more absolute profit despite nearly identical market value
Q1 PAT was ₹1,176.9 crore versus AU at ₹796 crore.
Federal earned roughly 48% more absolute quarterly profit.
Yet AU trades at almost the same market capitalisation.
The market is clearly paying for AU's higher growth and return trajectory rather than current absolute profit.
ROA explains why AU still receives the premium
AU earns 1.7% versus Federal at 1.22%.
AU therefore creates more profit from every ₹100 of assets.
This is exactly what an investor should expect from a bank trading at a much higher book multiple.
ROE tells the same story
AU: 15.6%.
Federal: 12.01%.
The gap is meaningful.
It is not wide enough to ignore a near-2x difference in price-to-book.
The valuation is where this comparison becomes difficult for AU
Fresh August 28 data places AU around 28.3x earnings and 3.94x book.
Federal trades around 18.15x earnings and 2.14x book.
AU is therefore approximately:
- 56% more expensive on P/E.
- 84% more expensive on P/B.
What does AU need to justify 4x book?
Persistent high growth plus persistent high ROE.
If AU compounds loans above 20%, deposits above 20% and book value around the mid-teens while maintaining 15%-17% ROE, the premium can be economically defensible.
If growth drops toward Federal's level while valuation remains twice as high, the argument becomes much weaker.
Federal's valuation has already rerated too
2.14x book is not historically cheap for Federal Bank.
Its five-year median P/B has been materially lower.
The current premium reflects:
- Record asset quality.
- Improving NIM.
- Higher ROA.
- Strong recent earnings.
- Very strong stock-price momentum.
Federal's one-year stock return is actually stronger
| Bull Run Snapshot — 25 Aug 2026 | AU Small Finance Bank | Federal Bank |
|---|---|---|
| Price | ₹1,128.60 | ₹346.95 |
| Market capitalisation | ₹77,953 Cr | ₹80,857 Cr |
| 1-month return | +12.41% | -2.07% |
| 3-month return | +12.30% | +20.09% |
| 6-month return | +16.03% | +15.84% |
| 1-year return | +50.56% | +77.91% |
| 52-week high | ₹1,144.10 | ₹371.70 |
| 52-week low | ₹682.15 | ₹188.40 |
| RSI 14 | 70.29 | 41.81 |
| Bull Run Score | 50.3/100 | 43.9/100 |
The market has already discovered both stories.
Federal's 78% one-year rise shows that its asset-quality and earnings rerating is far from hidden.
AU's price was almost at its 52-week high and its RSI was near the traditional overbought threshold in Bull Run's August 25 snapshot.
The market-cap coincidence may not last
Today they are almost identical.
From here the stocks can diverge because the rerating mechanisms differ.
AU rerating mechanism
- Universal licence finalisation.
- 20%+ balance-sheet growth.
- ROA approaches 2%.
- ROE remains mid-teens.
- Credit cost keeps falling.
- National expansion works.
Federal rerating mechanism
- ROA moves toward 1.4%-1.5%.
- NIM stays above 3.3%.
- CASA improves.
- Fee income remains strong.
- NNPA stays near current lows.
- Cost-to-income falls below 50%.
AU has more regulatory-transition optionality
The possible universal-bank licence gives investors a catalyst Federal does not need because Federal is already a conventional universal bank.
Successful transition can broaden AU's product set and customer pool.
The market may also award a different peer set over time.
But a licence change alone creates no shareholder value.
Execution after the licence matters.
Federal has more proven lifecycle stability
Its franchise has been through more credit and interest-rate cycles as a full-service bank.
The business is less dependent on a single transformation event.
This makes the Federal thesis more straightforward:
Improve returns on an already large, clean balance sheet.
AU is the more aggressive compounding model
Its deposits are growing twice as fast.
Its loans are growing roughly eight percentage points faster.
ROA is almost 50 basis points higher.
If those differences persist for five years, the current balance-sheet gap can shrink dramatically.
Federal is the more forgiving valuation model
At roughly 2.1x book rather than 4x, less future perfection is required.
Federal does not need 23% loan growth to justify its price.
It needs continued improvement in profitability and asset quality.
Where can AU's premium break?
- Loan growth slows materially below 20%.
- Universal-bank diversification compresses NIM faster than fees compensate.
- Expansion into newer states increases slippages.
- Credit cost moves back above 1%.
- ROE slips toward low teens.
- P/B normalises toward the broader banking sector.
Where can Federal's cheaper valuation become a trap?
- NIM expansion proves temporary.
- Higher-yield lending causes future credit losses.
- Deposit growth stays below asset growth.
- ROA stalls near 1.2%.
- Recent rerating has already captured most fundamental improvement.
The most important metric for AU is no longer NIM
It is sustainable ROA.
If AU transitions toward universal banking and NIM falls from 5.9% to, say, the low-5% range while ROA remains 1.7%-2%, that could still be an excellent outcome.
A lower-margin but more diversified franchise can be more valuable.
The most important metric for Federal is ROA progression
Federal's current 1.22% ROA still leaves room to improve.
If it moves toward 1.5% while the balance sheet keeps growing mid-teens, the earnings equation becomes materially stronger.
The bank does not need AU-like NIM to produce attractive shareholder economics.
AU Small Finance Bank vs Federal Bank: current conclusion
AU currently has the superior growth and return profile.
Deposits grow faster.
Loans grow faster.
NIM is much higher.
ROA is higher.
ROE is higher.
Federal currently has the superior balance-sheet quality and valuation profile.
It owns roughly twice the deposits and loans at almost the same market value.
NPAs are much lower.
Credit cost is lower.
Cost-to-income is lower.
AU Small Finance Bank vs Federal Bank FAQs
Which bank is larger?
Federal Bank by roughly two times on deposits and advances.
Which bank is growing faster?
AU. Deposits grew 24% and loans 23%, compared with Federal at approximately 11.4% and 14.9%.
Which has the higher NIM?
AU at 5.9%, compared with Federal Bank at 3.33%.
Which has better asset quality?
Federal Bank by a wide margin, particularly on net NPA.
Which has the higher ROA?
AU at 1.7% versus Federal at 1.22%.
Which has the higher ROE?
AU at 15.6% versus Federal at 12.01%.
Which has lower credit cost?
Federal at approximately 0.41% versus AU around 0.8% including CGFMU premium.
Which stock is cheaper?
Federal Bank on both late-August P/E and P/B.
Has AU's universal-bank transition completed?
No. AU has in-principle RBI approval and has submitted the final licence application, but final approval remains pending as of August 31, 2026.
Where can investors check Bull Run data?
Use the AU Small Finance Bank stock page and Federal Bank stock page.
Research sources
Disclaimer
This article is educational and informational only. AU Small Finance Bank and Federal Bank operate under different current regulatory histories and have different asset mixes. AU's final Universal Bank licence remains subject to RBI approval and should not be treated as completed. NIM, cost-of-funds, cost-of-deposits and credit-cost ratios may use different denominators across the two banks, so definitions are stated where material. AU's current high margin partly reflects the economics of its granular higher-yield lending model; Federal's lower margin accompanies a broader universal-bank portfolio. Current valuation multiples are late-August 2026 observations and can change daily. Nothing here recommends buying, selling or holding AU Small Finance Bank, Federal Bank or any security. Bull Run is not a SEBI-registered Research Analyst or Investment Adviser.