Start with the reason you are doing this

Most people put off sorting a pension because the whole thing feels abstract. Retirement is decades away, and there is always something more urgent competing for the same money. But a pension is one of the few places where the tax system actively helps you save, and where time does a lot of the heavy lifting. A rough rule of thumb: money invested in your thirties has around twice as long to grow as money invested in your fifties, so the contributions you make early usually end up doing more work than the ones you make later.

Before you open anything, it helps to be clear about what you are saving for. A comfortable retirement, an earlier exit from full-time work, or simply not relying on the State Pension alone? That answer will shape how much you contribute, how you invest, and how often you review things.

Do not leave your employer's contribution on the table

If you are employed, your workplace pension is almost always the best starting point, and the reason is simple: free money. Under automatic enrolment, your employer must contribute at least 3% of your qualifying earnings, on top of the 5% you put in yourself. Many employers go further, matching whatever you pay up to a set limit.

• Check your scheme's matching rules. If your employer matches up to 6% and you are paying 5%, you are walking away from money that would cost you very little to claim.
• Ask about salary sacrifice. Where it is offered, you give up part of your salary in return for a pension contribution. You save National Insurance as well as income tax, and your employer often passes on some of their own NI saving too.
• Look at the total picture. A 3% employer contribution on a £35,000 salary is over £1,000 a year before any investment growth. Over a working lifetime, that adds up to a serious sum.

If you are self-employed, there is no employer contribution to chase, but tax relief still applies and you still get to choose your own provider. Roughly speaking, a £100 contribution costs a basic-rate taxpayer £80, because the government tops up the rest.

Understand the tax relief you are entitled to

Tax relief is the quiet engine of pension saving, and it is worth understanding which method your scheme uses.

• Relief at source. You pay in £80 and the provider claims £20 from HMRC. If you are a higher or additional-rate taxpayer, you can claim the extra relief through Self Assessment or by contacting HMRC.
• Net pay arrangements. Contributions come out of your pay before tax is calculated, so higher earners get their full relief automatically.
• Annual allowance. Most people can pay in up to £60,000 across all their pensions each tax year. If you have a high income or have flexibly accessed a pension already, different rules may apply, so check before making a large one-off contribution.

There is also a lifetime cap on the tax-free lump sum, currently £268,275 for most people. You can normally take 25% of your pot tax-free when you access it, with the rest taxed as income. Remember that pension money is generally locked away until age 55, rising to 57 in 2028, so it is not a substitute for an emergency fund.

Do not ignore fees, because they compound too

A charge of 0.5% a year sounds trivial. Over 30 years it is not. Fees come out of your pot whether the investments do well or badly, and small differences snowball in the same way returns do.

• Look for two layers of cost: the platform or scheme charge, and the fund's own ongoing charge.
• Workplace default funds are capped at 0.75% for the charges they cover, which is a useful benchmark.
• Watch for exit fees, dealing charges and transfer penalties, especially on older policies or ones sold with advice attached.
• Do not assume cheaper is always better. A slightly pricier fund that genuinely fits your plans can beat a cheap one that does not.

Choose a fund that matches your timeline and temperament

This is where many people freeze, so keep it simple. Two questions matter most: when will you need the money, and how would you feel watching your pot fall 30% in a bad year?

If retirement is 25 or more years away, most people can sensibly hold a higher proportion of shares, because there is time to recover from downturns. As you approach the point where you will start drawing on the money, many providers shift you gradually into less volatile assets. That process is often called lifestyling, and default funds usually do it automatically.

Be honest with yourself about risk. Selling up in a panic during a market fall is far more damaging than holding a slightly cautious portfolio from the start. If you are unsure, a low-cost globally diversified fund is a reasonable, unglamorous default for many savers.

Tidy up the admin and review it once a year

Once the account is open, the biggest wins come from small habits rather than clever moves.

• Track down old workplace pots. Changing jobs often leaves a trail of small pensions. Consolidating can cut costs and make everything easier to see, but check for exit penalties and valuable guarantees first.
• Nominate your beneficiaries. This tells the scheme who should receive the money if you die before drawing it, and it usually sits outside your will.
• Check your State Pension forecast. You generally need 35 qualifying years for the full new State Pension and at least 10 to get anything, so filling gaps can be worthwhile.
• Increase contributions when your pay rises. Even a 1% bump each year makes a noticeable difference by retirement.

Set a reminder to review your pension once a year. Fifteen minutes spent checking contributions, charges and your fund choice is one of the better-paid quarter hours you will ever spend.