How to Start Saving for Retirement at 25 (UK Guide)

Photo by Nick Fewings on Unsplash

Turning 25 doesn’t usually come with a retirement planning checklist. You’re more likely thinking about rent, student loan repayments, or finally affording a decent holiday. But here’s the thing: this is actually the best possible moment to start thinking about your pension, even if retirement feels like a lifetime away (because, frankly, it is).

The reason age 25 matters so much comes down to one word: compounding. Money you invest now has 40-plus years to grow, and that time is worth far more than any amount you could throw at your pension in your 50s. This article walks you through exactly how to start saving for retirement at 25 in the UK — from understanding workplace pensions to deciding whether a Lifetime ISA makes sense alongside it.

You don’t need to be an expert or have spare thousands lying around. You just need to understand the basics and get started, even with small amounts.

Why Starting at 25 Makes Such a Big Difference

Let’s use a simple example. If you start saving £150 a month into a pension at 25 and get an average 5% annual return, by 65 you could have built up somewhere in the region of £230,000. Start the same £150 a month at 35 instead, and you’d end up with roughly £125,000 — nearly half as much, just from losing ten years.

This isn’t about being naturally good with money. It’s maths. The earlier your money is invested, the more time it has to grow on itself, and then grow on the growth. Waiting even five years can cost you tens of thousands of pounds by the time you retire.

The good news is that in the UK, the system is largely built to help you save automatically, particularly through workplace pensions.

Understand Your Workplace Pension First

If you’re employed in the UK and earn over £10,000 a year, your employer is legally required to automatically enrol you into a workplace pension scheme, unless you actively opt out. This is genuinely one of the best financial deals available to you.

Here’s how it typically works:

• You contribute a minimum of 5% of your qualifying earnings
• Your employer adds at least 3% on top
• Tax relief from the government tops up your own contribution further

That means for every £100 you put in, you might only actually feel the loss of about £80 from your take-home pay, once tax relief is included — and your employer is adding money on top of that too. It’s essentially free money, and turning it down means walking away from part of your salary.

Check your payslip or ask HR what percentage you’re contributing. If you can afford to contribute more than the minimum, even an extra 1–2% makes a noticeable difference over 40 years.

You can read more about how automatic enrolment works on GOV.UK.

What If You’re Self-Employed?

Self-employed workers don’t get automatic enrolment or an employer contribution, which means it’s entirely on you to set something up. This is worth taking seriously, because research consistently shows self-employed people in the UK are far less likely to be saving into a pension at all.

Options include:

• A self-invested personal pension (SIPP) through providers like Vanguard, AJ Bell, or Hargreaves Lansdown
• A stakeholder pension, which usually has lower minimum contributions and capped charges
• Setting up a standing order to a pension provider each month, even if it’s just £50–£100 to start

The key is consistency rather than perfection. Starting with a modest, regular contribution beats waiting until you can afford a “proper” amount.

Should You Use a Pension, a Lifetime ISA, or Both?

This is one of the most common questions 20-somethings have, and the honest answer is: it depends on your situation.

For most 25-year-olds in employment, the workplace pension should come first simply because of the employer contribution — it’s money you’d otherwise lose entirely. A Lifetime ISA can be a great addition if you’re also saving for a first home, since you get the government bonus either way.

If you’re self-employed and don’t have access to employer contributions, a LISA becomes more attractive as your primary retirement vehicle, especially given the flexibility around first-home use.

How Much Should You Actually Be Saving?

There’s no single “right” answer, but a commonly used guideline is: take the age you start saving, halve it, and use that as the percentage of your salary to contribute. Starting at 25 means aiming for around 12–13% of your income going toward retirement, including your employer’s contribution.

That sounds like a lot when you’re 25, and it’s fine if you can’t hit that immediately. Realistically, most people build up to this over several years. What matters more right now is:

1. Contributing enough to get your full employer match (never miss free money)
2. Increasing your contribution percentage slightly every time you get a pay rise
3. Not touching your pension pot once it’s in there

Even 8–10% total (including employer contributions) at 25 puts you in a far stronger position than most of your peers.

Common Mistakes to Avoid in Your 20s

A few habits derail retirement saving before it even gets going:

• Opting out of auto-enrolment to boost take-home pay short-term — this is one of the costliest financial decisions you can make in your 20s
• Not increasing contributions with pay rises — if your salary jumps 5%, put at least some of that toward your pension too
• Forgetting about old workplace pensions when you change jobs — use the government’s pension tracing service if you’ve lost track of one
• Assuming it’s “too early to bother” — the opposite is true; this is exactly when your contributions do the most work

The Money Advice service via MoneyHelper offers free, independent guidance if you want to check your specific pension options without paying for financial advice.

Small Habits That Make a Big Long-Term Difference

You don’t need a six-figure salary to build a solid pension. A few practical habits help:

• Set up contributions to increase automatically each year, even by 1%
• Consolidate old pensions from previous jobs into one account to avoid multiple small fees
• Review your pension once a year, ideally around your birthday, so it becomes a habit rather than an afterthought
• Avoid checking your pension balance too often — short-term dips are normal and checking constantly can tempt people into poor decisions

Conclusion

Starting to save for retirement at 25 might not feel urgent, but it’s one of the most valuable financial decisions you’ll make in your entire life. Here’s what to take away:

• Time is your biggest asset — starting at 25 rather than 35 can nearly double your final pension pot for the same monthly contribution
• Never turn down free money — always contribute enough to get your full employer pension match
• Choose the right account for your situation — workplace pensions for employees, SIPPs or LISAs for the self-employed
• Aim to build up gradually — even modest contributions now beat larger ones later
• Review annually — small yearly increases add up to a significantly bigger retirement fund

You don’t need to have it all figured out today. You just need to start, however small that start looks right now.

Next read: Want to get your everyday finances sorted first? Read our guide on budgeting for beginners: /budgeting-for-beginners-uk