Millions of UK Adults Are Missing Out on Thousands in Pension Entitlements — Are You One of Them?

After 25 years advising UK clients on retirement — first at Barclays, and now independently at Meridian — I can say with confidence: the majority of people I speak to are leaving money on the table. Not through bad luck. Through lack of information.

The UK pension system, while generous by international standards, is also deeply complex. Between State Pension gaps, workplace pension consolidation, and the rules around pension credit and benefits, it's entirely possible for a 60-year-old to be sitting on unclaimed entitlements they've spent decades building — without ever knowing.

In this guide, I want to walk you through the five most common mistakes people make in the five years before retirement — and what you can do right now to address them.

1. Not Checking Your State Pension Forecast

This is the single most overlooked step in retirement planning. Many people assume their State Pension will simply "be there" at full value when the time comes. In reality, your State Pension entitlement is calculated based on your National Insurance (NI) contribution record — and gaps in that record directly reduce your weekly payment.

You need 35 qualifying years of NI contributions to receive the full new State Pension (currently £221.20 per week). But employment gaps — periods of self-employment without NI contributions, years spent caring for children or elderly relatives, or time working abroad — can all create shortfalls.

The good news: you can buy voluntary NI contributions to fill most gaps, at a cost that typically pays back within three to four years of retirement. This is one of the highest-return financial decisions available to UK adults in their 50s and 60s.

2. Leaving Pension Pots With Old Employers

The average UK worker changes jobs eleven times during their career. Each job with a workplace pension scheme leaves behind a pot — and many of those pots sit untouched, sometimes for decades, with fees quietly eroding their value.

Consolidating your pensions isn't always the right answer — some older schemes have valuable guaranteed annuity rates or defined benefit components worth preserving. But you should know exactly what you have and where it is before making any decision.

3. Underestimating How Long Retirement Lasts

This is perhaps the most psychologically difficult mistake to address. If you retire at 65 and live to 87 — which is entirely plausible for a non-smoking woman in good health in the UK — you are planning for a 22-year retirement. That's longer than many careers.

The financial implications are significant. A retirement pot that looks generous at 65 can look very different at 80, particularly after accounting for inflation, potential care costs, and the natural drawdown of income. Understanding sustainable withdrawal rates — typically considered to be 3.5% to 4% per year — is essential for anyone relying on a defined contribution pension.

4. Overlooking Pension Credit and Benefits Entitlement

Pension Credit is one of the most underclaimed benefits in the UK. It is available to people over State Pension age on lower incomes, and it not only tops up income directly — it also acts as a gateway to a wide range of other support, including free TV licences, help with council tax, and cold weather payments.

Around 850,000 eligible households are currently not claiming Pension Credit, according to DWP figures. The stigma around "benefits" often stops people from checking their eligibility — but Pension Credit is an entitlement built on decades of contributions to the UK system, not charity.

5. Not Having a Written Retirement Income Plan

This sounds obvious. But in 25 years of client consultations, I've found that the majority of people approaching retirement have never sat down and mapped out, month by month, where their income will come from — and whether it will be enough.

A basic retirement income plan should account for: State Pension start date and amount, private pension drawdown or annuity income, any defined benefit scheme income, rental income if applicable, ISA and savings drawdown, and anticipated major expenditures (home adaptations, family support, travel in early retirement).

You don't need a financial adviser to build a first draft of this plan — though a qualified IFA can add significant value in stress-testing assumptions and optimising tax efficiency. What you do need is the information, and the willingness to look at the numbers honestly.

The decisions you make in the five years before retirement have an outsized impact on the financial security of the following twenty or thirty years. The good news is that for most people, there is still time to act — and even small improvements to your pension picture can make a meaningful difference to your quality of life in retirement.

Jeremy Cox is a Senior Retirement Consultant at Meridian Retirement Consulting Ltd. He writes in an educational capacity. This article does not constitute financial advice. Always consult a regulated financial adviser before making decisions about your pension.