Rethinking concentration risk beyond the FTSE 100’s dividend giants

UK equity income funds have long leaned on a familiar handful of names for the bulk of their distributions. The numbers behind that habit have started to look uncomfortable. Just ten FTSE 100 companies are forecast to pay more than half of the index’s 2026 dividends. The question is what that concentration means for income investors today.

The arithmetic of FTSE 100 dividend concentration

The data is unambiguous. According to AJ Bell’s Dividend Dashboard, ten companies are forecast to pay 52% of total FTSE 100 dividends in 2026, equivalent to roughly £45.7 billion of the £88 billion aggregate. The top twenty will pay close to 70% of the total. Five names alone accounted for 28.7% of payments in the third quarter of 2025, according to Computershare’s UK Dividend Monitor.

That concentration is not new, but it has hardened. The top ten list spans a narrow set of sectors:

• Oil majors: Shell and BP
• Pharmaceuticals: AstraZeneca and GSK
• Banks: HSBC and Lloyds
• Plus a small cluster of consumer staples, miners and life insurers including Unilever, Rio Tinto, Legal & General and Phoenix Group

A UK income investor holding a passive FTSE 100 product, or a closet-tracking active fund, is effectively running a concentrated bet on the cash-generation profile of about a dozen businesses.

That bet has worked, on aggregate, for a long time. It has also produced concentrated drawdowns:

• Shell, 2020. Removed roughly £8 billion of expected payouts in a single announcement during the pandemic shock.
• Vodafone, 2024. Halved its dividend, taking out another £1.5 billion of distributions to FTSE 100 income holders.

Both episodes hit UK income funds in proportion to how mechanically they tracked the index.

What sits behind the concentration

UK dividend concentration is partly a function of how the FTSE 100 is constructed. The index is dominated by mature, capital-return-driven businesses operating in commoditised or regulated industries. Profit growth is modest. Cash return is the primary mechanism by which shareholders are rewarded. That model works well in steady state. It does not work when a single sector cuts in unison.

There is also a structural currency layer. Around thirty FTSE 100 members declare dividends in dollars or euros, including most of the index’s largest payers. A strong pound, of the kind seen against the dollar through parts of 2025, compresses the sterling value of those distributions before any operational change at the underlying companies. UK income funds quietly absorb this translation risk on behalf of their unitholders. For context on how currency dynamics affect global portfolios, see our coverage of global market and currency moves.

Dividend cover, the ratio of underlying earnings to declared dividends, has been drifting lower. AJ Bell’s data shows aggregate FTSE 100 cover slipping below the two-times threshold that has historically signalled comfort, sitting at 1.96 for 2025. The index has absorbed 140 dividend cuts in the past decade, including the wave that followed the pandemic. Cover above two times is not a guarantee of safety, but cover below it is a warning that should not be ignored.

Why the headline yield is misleading

The FTSE 100’s forward dividend yield sat at about 3.4% at the start of 2026, with the ten-year gilt yielding close to 5% based on Bank of England statistics. For an investor able to lock in a risk-free nominal return well above the index yield, the case for UK equity income has to rest on dividend growth, not on current yield. That is a different question from the one most income investors have been asking for the past decade.

It also exposes a quiet problem with the headline number. The FTSE 100 yield is an average dragged up by a small number of high payers, and the spread across the index is wide:

• High yielders (above 6%): Legal & General, Phoenix Group, M&G, British American Tobacco.
• Moderate yielders with growth (3% to 5%): Shell, BP, BAE Systems, Unilever.
• Lower yielders with stronger growth (below 3%): Sage, Rolls-Royce, AstraZeneca.

Treating all of these as equivalent inside an income mandate is a category error. The high yielders are concentrated in sectors where regulatory risk, structural decline and capital-return policy all play a role. The growers are not necessarily expensive. They are simply distributing less of their earnings today in exchange for compounding payouts faster. An income portfolio that ignores the second category in favour of the first is not running an income strategy. It is running a yield-screen strategy with no growth term.

The case for a broader, more selective income portfolio

The argument for diversifying away from the FTSE 100 dividend giants is not an argument against them. It is an argument for sitting them inside a broader, more deliberately constructed income mandate. That mandate could draw on three additional pools.

• The FTSE 250. The mid-cap index trades at a meaningfully wider dividend yield than the FTSE 100, with current yield close to 4.3% according to Computershare’s data. It also contains a cohort of dividend-growing businesses with stronger top-line growth than the megacap blue chips. The trade-off is volatility, not income quality.
• Investment trusts with multi-decade dividend records. The Association of Investment Companies maintains a list of “dividend heroes” with twenty or more consecutive years of increases. A handful of these trusts have raised distributions through every recession, currency crisis and policy shock of the past forty years. Their structural ability to retain up to 15% of revenue each year, smoothing distributions across cycles, is a feature passive open-ended funds cannot replicate.
• Global income exposure with non-UK weightings. UK income managers increasingly run portfolios with meaningful European, US and Asian holdings to dilute single-country concentration. The objective is the same yield outcome, drawn from a wider opportunity set.

For a longer-term view on how investors can structure income across markets and life stages, see our guide to planning a sustainable retirement portfolio.

None of these alternatives is a free lunch. Each adds different risks:

• Liquidity constraints in smaller-cap names during market stress.
• Premium and discount volatility in investment trusts.
• Currency translation pressure in global mandates.

The case for using them is not that they outperform the FTSE 100 in every market. It is that they reduce the reliance of an entire income mandate on the dividend policies of approximately ten companies. That is a structural improvement, not a tactical call. Active managers running UK and global income strategies have argued through their fund commentaries that the dispersion between sustainable and unsustainable payouts is now wide enough to reward bottom-up selection over index exposure.

Where income strategy goes from here

UK income investors have benefited for years from a handful of FTSE 100 names doing the heavy lifting on distributions. That dependence is now visible, measurable and, in some sectors, concentrated enough to warrant rethinking. Diversifying the income engine into mid-caps, investment trusts and selective global exposures does not abandon the blue chips. It simply spreads the risk that any single dividend cut becomes a portfolio event. For investors planning long-term income, that change of mindset is now well overdue.