How do Pensions Work

A pension is just a long-term savings pot you build up during your working years so you have money to live on when you stop working. That's it. No magic.

The idea is simple: set money aside now, invest it, let it grow over decades, then use it in retirement.

The problem: most people aren't saving enough

A recent UK study found that up to 14 million working-age adults are not on track to have enough pension income for a decent retirement. That's roughly a third of the workforce. Many will rely solely on the state pension – which in the UK is about £11,500 a year. That's not enough to live on comfortably anywhere.

The same problem exists in the US. Social Security was never designed to be your only income. It covers basic needs at best.

Why pensions matter to every nation

When people don't save for retirement, the government has to pick up the tab through welfare, housing benefits, and healthcare. That strains public finances. Countries like the UK and US already have aging populations – fewer workers paying taxes to support more retirees. If everyone retires poor, the system breaks.

Pensions aren't just personal. They're national policy. A population that saves for its own old age reduces the burden on taxpayers and keeps the economy stable.

The real engine: compounding over time

A pension works because of time. Decades of steady growth turn small savings into large sums.

Here's an example.

Imagine you invest a one-time lump sum of £10,000 at age 25 and leave it until you're 65 (40 years).

• At 8% average annual return – roughly what the stock market has historically delivered – that £10,000 grows to about £217,000.
• At 16% average annual return – aggressive, but possible with higher-risk investments – that same £10,000 grows to over £9.3 million.

Same money, same time, just different return rates. That's the power of compounding: your returns earn returns, which earn more returns. Over 40 years, it's explosive.

Now imagine saving £200 a month for 40 years instead of a lump sum. At 8%, you'd end up with roughly £620,000. At 16%? Over £8 million.

The key is time and consistency. You can't get that from a savings account. You need growth assets like shares – exactly what a good pension invests in.

Who's responsible for your future?

In the UK, the government gives you a state pension and tax relief on your own savings. In the US, you get Social Security and tax advantages on 401(k)s and IRAs. But neither government guarantees you a comfortable retirement.

It is not the government's job to make you rich in old age. It's theirs to provide a safety net. The rest is up to you.

If you don't save, you will work until you drop – or live on very little. That's the hard truth.

Meanwhile, politicians look after themselves

Here's something that sticks in the throat: UK politicians still belong to a defined benefit (DB) pension scheme. That means they get a guaranteed income for life, based on their final salary, usually with inflation protection. It's gold-plated.

Most people in the private sector haven't had access to a DB pension for decades. They get defined contribution (DC) pensions, where your final pot depends entirely on what you and your employer put in and how the markets perform. The risk is all on you.

So the people making the rules have locked in a comfortable retirement for themselves while leaving everyone else to fend for themselves in a riskier system. That's not very nice. And it's a good reason to take your pension seriously – because nobody else will do it for you.

Bottom line

Start early. Save consistently. Invest in growth assets. Let compounding do the heavy lifting. Check your pension regularly – it's your money, not the government's.

If you're in your 20s or 30s, the single best financial decision you can make is to pay yourself first into a pension. Your Future Self will be very grateful...