We're evolving. Mercer is now part of the new, expanded Marsh brand

Achieving better outcomes: Private Markets and the UK Retirement Challenge 

It is challenging to define the future investment landscape by a single problem. However, in the UK, we face a significant pension savings gap, which is exacerbated by the increasingly sharp reality of an aging population.

According to the Department for Work & Pensions, four in 10 (43%) working-aged people (equivalent to 14.6 million) are not saving enough for retirement[1]  Investment returns alone cannot close this gap entirely. Evidently, there is a significant need for greater education on understanding the importance of saving sufficiently for retirement, while maintaining higher contribution levels also remains essential. However, once invested, we see private markets as a way to help member assets achieve higher returns over the long term, leading to better retirement outcomes.

This transformation has been driven, in part, by the recent Mansion House Accord, a UK government initiative calling for UK DC master trusts to sign up to an ambition to have at least 10% of their default pension scheme assets allocated to private markets by 2030, with at least 5% invested in UK-based assets.[2]

Our belief is that private markets are appropriate longterm investments for DC members likely to improve risk adjusted returns and retirement outcomes, with The Accord providing an alignment of policy and investment philosophy that can accelerate industry adoption.

In this report, we examine how these trends are reshaping risks and opportunities, supported by key data signals.

More companies are staying private for longer, and public equities are increasingly dominated by the Magnificent Seven[3]. While more than US$1 trillion of hyperscaler capex is expected in 2026 and 2027, more than many well-developed countries’ GDP[4].

The AI boom is fuelling growth in infrastructure and real estate but may lead to doubling up of risk. By 2028, estimates suggest AI alone could consume as much electricity annually as 22% of all US households[5].

In our view, the decade of financial repression is largely behind us. The increase in SOFR from 0% in 2020 to nearly 4% in 2025 is creating both opportunities and risks for investors, as credit allocations increasingly mix public and private credit[6]

Private Markets and the UK Retirement Challenge Report 2026

Unlock key insights essential to building a resilient, future-ready portfolio.
Related Solutions
Related Insights