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Bae Systems stock has delivered a very strong 5 year return, yet current valuation checks, including an intrinsic value estimate based on a Discounted Cash Flow (DCF), still indicate the shares trade at a discount to that assessment of fair value.
Bae Systems has returned 293.0% over the last 5 years, which puts extra focus on whether the current price is still below a reasonable estimate of intrinsic value.
Recent contract wins in autonomous combat aircraft and advanced electronic warfare can support expectations for future cash flows, while any shift in defence spending priorities remains a key risk to how those future cash flows are priced today.
The broader valuation checks lean cheap, with Bae Systems screening as undervalued in 5 of 6 tests, giving it a high value score of 5.
The issue now is whether that apparent discount, including an intrinsic value estimate that sits 23.2% above the latest £19.09 close, still offers enough margin of safety after such a strong multi year run.
Find out why BAE Systems’ 4.5% return over the last year is lagging behind its peers.
Is BAE Systems Still Cheap on Cash Flow?
The Discounted Cash Flow (DCF) model here values BAE Systems by projecting future free cash flows and discounting them back to today. On the latest twelve month numbers, BAE Systems generated around £2.3b of free cash flow, and the model assumes those cash flows continue growing rather than shrinking, which supports a higher implied equity value.
On that basis, the 2 Stage Free Cash Flow to Equity model arrives at an estimated intrinsic value of about £24.85 per share, compared with the recent £19.09 share price, implying the stock screens around 23.2% undervalued. The unveiling of the Brontanax autonomous Collaborative Combat Aircraft, supported by committed UK funding, helps explain why investors may see further cash flow potential that is not fully reflected in today’s price.
Overall, the DCF work suggests BAE Systems stock currently looks undervalued relative to the cash flows implied by the model.
Our Discounted Cash Flow (DCF) analysis suggests BAE Systems is undervalued by 23.2%. Track this in your watchlist or portfolio, or discover 10 more high quality undervalued stocks.
BA. Discounted Cash Flow as at Jul 2026
Is BAE Systems a Bargain on Earnings?
Story Continues
The P/E multiple is a useful cross check for BAE Systems because earnings are a key focus for many defence investors. On this measure, the stock trades on about 26.2x earnings, compared with an industry average P/E of roughly 44.6x and a peer average around 20.6x. So the shares sit at a premium to close peers, but at a sizeable discount to the wider Aerospace & Defense group.
Using a more tailored fair P/E of about 31.9x, which reflects BAE Systems’ specific growth profile, margins, size and risk, the current 26.2x level sits below that benchmark. That gap indicates the market is pricing the stock below the level suggested by this framework, based on the stated assumptions.
On earnings, BAE Systems stock currently appears undervalued relative to the P/E multiple implied by its fundamentals and sector context.
LSE:BA. P/E Ratio as at Jul 2026
See what the numbers say about this price — find out in our valuation breakdown.
The BAE Systems Narrative: What Would Justify Today’s Price?
Simply Wall St Narratives for BAE Systems set out the specific paths that could make BAE Systems’ current valuation look either too low or too high, by tying today’s price to clear assumptions about future growth, margins and earnings. Instead of leaving you with a single result from a ratio or model, they set out the future that result relies on so you can see over time whether those conditions actually play out.
The community is split on BAE Systems, with one camp focused on backlog supported growth and another focused on policy and contract risks.
Bull case: 18% undervalued
“The company’s order backlog has surged to £75 billion, with a pipeline of new opportunities partly fueled by higher defense spending commitments across NATO, the US, UK, Europe, and Indo-Pacific…”
Read the full Bull Case to see why BAE Systems could be undervalued
Bear case: roughly fairly valued
“Intensifying public and political demands for defense budget reductions in Western countries may lead to a shrinking of BAE Systems’ largest addressable markets, with future government spending at risk as social and fiscal priorities change…”
Read the full Bear Case to see why BAE Systems could be overvalued
Do you think there’s more to the story for BAE Systems? Head over to our Community to see what others are saying!
The Bottom Line
For BAE Systems, both the Discounted Cash Flow (DCF) work and the earnings multiple comparison currently lean the same way, pointing to a stock that still screens as undervalued rather than fully priced. The broader checks also line up with that view, so the gap between intrinsic value estimates and the market price is not just a single model outlier.
What really decides it from here is whether defence budgets and contract flows remain supportive enough to turn today’s contracted backlog into the cash flows the models assume. The central question for investors is whether that discount reflects a genuine opportunity or the market’s caution on future defence spending priorities.
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 BA.L.
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