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Banco Santander has delivered very strong gains for shareholders over the last five years, and the latest valuation work suggests the stock may still trade at a discount to its intrinsic value despite that run.
The stock has returned about 356.0% over 5 years, which puts recent enthusiasm firmly on the radar for anyone thinking about new money going into Banco Santander.
The planned $12.2b acquisition of Webster Financial and the ongoing multi billion euro share buyback can support the intrinsic value outlook, while the execution risk around a large United States integration remains a key factor for how the market prices the stock.
Banco Santander scores 4 out of 6 on the valuation checks, which points to a mixed picture rather than a clearly cheap or clearly expensive stock.
The stock’s next move may depend on whether the current market price still offers enough of a discount to the intrinsic value estimate to compensate for the integration and execution risks ahead.
Is Banco Santander a Bargain on Excess Returns?
The Excess Returns model evaluates how efficiently Banco Santander earns profits on its equity compared with the return that shareholders require. For this stock, the inputs point to a book value of €7.64 per share and stable earnings of €1.27 per share, against a cost of equity of €0.69 per share and an excess return of €0.58 per share. That sits on top of an average return on equity of 15.52% and a stable book value estimate of €8.21 per share, which together feed into the intrinsic value estimate.
This approach produces an Excess Returns value of €18.74 per share, which implies the stock trades at about a 31.4% discount and therefore screens as undervalued relative to this framework. The model outcome also aligns with a P/E that is close to both the preferred multiple and the peer average. The Federal Reserve approval for the Webster Financial acquisition helps explain why some investors are prepared to underwrite higher future returns, yet the current price still sits well below the Excess Returns estimate.
On these Excess Returns assumptions, Banco Santander stock currently appears undervalued versus its estimated intrinsic value.
Our Excess Returns analysis suggests Banco Santander is undervalued by 31.4%. Track this in your watchlist or portfolio, or discover 252 more high quality undervalued stocks.
Story Continues
SAN Discounted Cash Flow as at Aug 2026
Is Banco Santander Still Cheap on Earnings?
The P/E ratio suits Banco Santander because earnings are a key driver for how investors usually look at large banks. The stock currently trades on a P/E of 14.2x, which sits close to the peer average of 14.8x and above the wider Banks industry average of 11.7x. That suggests the market prices Banco Santander in line with similar large banks rather than the broader sector.
The fair P/E multiple from this model is 16.6x. This is higher than the current 14.2x, which means the stock trades at a discount to what the framework suggests would be reasonable once factors like growth expectations, profitability and risk profile are taken into account. The gap also fits with the picture from the Excess Returns work, where the intrinsic value estimate sits above the current market price.
On the P/E multiple, Banco Santander stock appears undervalued relative to the fair ratio implied by its fundamentals and peer group.
BME:SAN P/E Ratio as at Aug 2026
See what the numbers say about this price — find out in our valuation breakdown.
The Banco Santander Narrative: What Would Justify Today’s Price?
Simply Wall St Narratives for Banco Santander pick up where the valuation work leaves off. They explain which combinations of future growth, margins and earnings would need to occur for Banco Santander’s stock to be worth significantly more or less than today’s price. Each narrative anchors its numbers in a clear view of how growth, profitability and risks might evolve, which you can revisit as new information comes through on the Community page.
The community is split on Banco Santander, with one camp focusing on digital growth and diversification and the other worried about technology spending and credit risk.
Bull case: roughly fairly valued
“Accelerated deployment of digital banking platforms (e.g., Openbank expansion, PagoNxt payments, AI-driven CRM), alongside cloud migration and automation, positions Santander to benefit from global digitization trends, lowering operating costs and improving net margins as digital usage and process efficiencies scale further…”
Read the full Bull Case to see why Banco Santander could be undervalued
Bear case: 32% overvalued
“The heavy reliance on large scale, group wide technology programs such as ONE Transformation and Gravity creates execution and decommissioning risk, where delays or duplication of platforms could erode the expected efficiency gains and weigh on net margins…”
Read the full Bear Case to see why Banco Santander could be overvalued
Do you think there’s more to the story for Banco Santander? Head over to our Community to see what others are saying!
The Bottom Line
On the current assumptions, the Excess Returns intrinsic value estimate and the P/E work both point to Banco Santander trading on an undervalued profile. The valuation checks are mixed rather than overwhelmingly strong, so the implied discount comes with caveats, not a free lunch. After such a sharp move in the share price, the key question is whether the market eventually closes that gap or keeps pricing in a lasting execution penalty around the large United States integration. That call largely comes down to how confidently you view Banco Santander’s ability to deliver on its technology and acquisition plans without eroding returns.
This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.
Companies discussed in this article include SAN.MC.
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