How do you factor ESG considerations into retirement investing?
Funds labelled ESG or sustainable differ enormously in what they actually hold, from light tilts that exclude almost nothing to strict exclusion strategies that drop whole sectors. The label tells you very little, the costs are modestly higher, and the honest framing is a decision about what you want to own rather than a claim about returns.
- The variation: two funds with the same label can hold very different companies.
- The cost: typically a little higher than a plain index fund, and worth checking.
- The tracking difference: excluding sectors means returns diverge from the market, in both directions.
- The workplace default: many schemes now apply ESG tilts to the default fund automatically.
01 The label tells you very little
ESG, sustainable, responsible and ethical are marketing terms with a regulatory floor rather than a common definition. One fund may simply tilt away from the worst-scoring companies in each sector; another may exclude fossil fuels, tobacco, defence and gambling entirely.
The consequence is that two funds with identical labels can hold substantially different portfolios, and an investor choosing on the label alone frequently gets something other than what they intended. The holdings list is the only reliable source.
Regulatory labelling rules have tightened to reduce that gap, and they set minimum standards rather than a single definition. Reading what the fund actually holds remains the only way to know.
Source: FCA consumer information
02 Cost and tracking difference
ESG index funds typically cost a little more than plain ones, because the screening and index licensing cost something. The difference is usually small, and it is real and compounds like any other charge.
Excluding sectors also means returns diverge from the broad market, and the divergence runs in both directions — energy exclusions helped in some years and hurt sharply in others. That is tracking difference rather than underperformance, and it should be expected rather than treated as a failure.
Anyone expecting ESG screening to improve returns should be clear that the evidence does not support a reliable premium in either direction. The reason to do it is that you want to own different things.
Shows: the cost difference between an ESG fund and a plain index fund over a long holding period. Ignores: any difference in returns, which is not reliably predictable in either direction.
On the defaults above, the worked example shows £6,218. The charge difference alone costs £6,218 over 25 years, before any difference in what the funds actually return.
Source: Retirement income market data
03 Where the decision actually gets made
For most people it is already made, by the default fund of a workplace scheme. Many schemes now apply ESG considerations to their defaults automatically, so the member holding the default has made a choice without making one.
That is worth knowing in both directions: someone who wanted ESG screening may already have it, and someone who did not may be holding it. The default is a decision whether or not anybody made it deliberately.
For a self-directed portfolio the practical approach is to decide what you want excluded, find a fund whose holdings actually reflect it, check the cost against a plain equivalent, and then leave it alone — the same discipline as any other fund choice.
Source: Workplace pensions
The label is nearly information-free. Two funds both called sustainable can hold completely different companies, and the only way to know what you are buying is to read the holdings — which takes ten minutes and almost nobody does. Beyond that, be honest with yourself about the reason. If you want to exclude certain industries from your money, that is a perfectly good reason and it does not need a performance justification. What I would not do is choose one expecting better returns, because the evidence does not support that in either direction.
FAQ
Do ESG funds perform better?
The evidence does not support a reliable premium in either direction. Excluding sectors makes returns diverge from the broad market, and that divergence has helped in some periods and hurt sharply in others.
Why do two ESG funds hold different things?
Because the labels are marketing terms above a regulatory floor rather than a single definition. One fund may tilt away from the worst-scoring companies in each sector; another may exclude whole industries. Only the holdings list tells you which.
Is my workplace pension already ESG?
Quite possibly. Many schemes now apply ESG considerations to their default fund, so a member holding the default has made the choice without making it. It is worth checking in either direction.
Sources
Regulator references
- FCA consumer information · Financial Conduct Authority · 2025The regulator's own consumer guidance on the products discussed here.Last verified: 2026-09-07
- Retirement income market data · Financial Conduct Authority · 2025What UK savers actually do at retirement, measured rather than assumed.Last verified: 2026-09-07
- Workplace pensions · GOV.UK · 2025The statutory auto-enrolment framework and who it covers.Last verified: 2026-09-07
Calculator unit tests · the assertions this page's worked example is checked against, and their last result
Changelog
- 2026-09-07 — initial publish (new format)
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Jordan Reeves
Founder of Talk Through Wealth. A software engineer for over a decade before turning to retirement planning, Jordan built the projection engine after watching family members get fragmented, country-by-country advice that never reconciled. He writes about retirement the way the engine computes it: month-by-month, lifetime-long, and skeptical of any rule of thumb that hasn't been run through the math.