What auto-enrolment actually requires

Auto-enrolment sets a minimum total contribution as a percentage of qualifying earnings, split between you, your employer and tax relief. It is a legal floor designed to get everyone started. It was never calibrated to fund a comfortable retirement and it will not do so on its own.

The halve-your-age rule

A widely used rule of thumb is to take the age at which you start saving seriously and put in half of it as a percentage of your salary. Start at 24 and that is 12%. Start at 40 and it is 20%. It is crude, but it captures the thing that matters most, which is that starting late costs far more per year than starting early.

Tax relief means it costs less than it looks

A pension contribution is made before income tax, so a basic-rate taxpayer putting in £100 gives up £80 of take-home pay. A higher-rate taxpayer gives up £60. People routinely underestimate how much they can afford because they think in gross figures rather than in what actually leaves their bank account.

Employer matching is the part to max out first

Many employers will increase their contribution if you increase yours, up to a limit. That is an immediate, guaranteed return on your money before any investment growth. If you do nothing else, find out what your employer will match and contribute at least enough to get all of it.

If you are starting late

The arithmetic is harder but not hopeless. Contributions in your fifties still get tax relief, still get employer matching, and still have a decade or more to grow. Increasing contributions when your salary rises, so your take-home pay never falls, is the most sustainable way to catch up.

A worked example: The match most people leave behind

Tom earns £35,000 and pays into his workplace pension. His employer will match contributions up to 6% but he is only putting in enough to trigger 3%.\nRaising his contribution to 6% costs him a modest amount of take-home pay after tax relief, and it brings an equal increase from his employer. That employer money is a guaranteed return before any investment growth. Leaving it unclaimed is the most expensive thing he could do with his pension.

Figures are illustrative and rounded, used to show how the rule works. Your own numbers will differ.

A second example: Raising it with each pay rise

Aisha increases her pension contribution by one percentage point every time she gets a rise, taking it from the increase rather than her existing pay.\nHer take-home pay never falls, so it never feels like a sacrifice. Over eight years her contribution rate roughly doubles without a single month where she noticed. It is the most reliable way to fix an under-funded pension without changing how you live.

At a glance

Common mistakes

• Treating the auto-enrolment minimum as a recommendation.
• Not contributing enough to collect the full employer match.
• Thinking in gross figures and underestimating what you can afford after tax relief.
• Opting out during a tight month and never opting back in.

What to do next, in order

1. Find out exactly what your employer will match, and contribute at least that.
2. Work out the after-tax cost of your contribution, not the gross figure.
3. Increase the percentage whenever your salary rises, so take-home never falls.
4. Review it once a year rather than setting it and forgetting.

Key terms, in plain English

Auto-enrolment

The legal requirement for employers to enrol eligible staff into a pension and contribute.

Qualifying earnings

The band of pay on which auto-enrolment contributions are calculated.

Employer matching

An employer increasing its contribution when you increase yours, up to a limit.

Tax relief

Government top-up on pension contributions, given at your marginal rate.

Annual allowance

The cap on how much can go into your pensions each tax year with tax relief, counting your contributions, your employer's and tax relief together.

Who this affects most

This matters most to people in their twenties and thirties, where each extra percentage point compounds longest, and to anyone not collecting their full employer match, which is free money being declined. Late starters should read it as a prompt rather than a discouragement.

Common questions

Where to check the official figures

Pension figures change every tax year. These are the free, official sources. Check the current number before you act on anything here.

• Check your State Pension forecast, GOV.UK
• Check your National Insurance record, GOV.UK
• Pension Tracing Service, GOV.UK
• MoneyHelper, pensions and retirement
• The FCA Register, check any firm

Where to go next

• Combining pensions: our main guide
• The NHS Pension Scheme explained
• The LGPS explained
• The Teachers’ Pension Scheme explained

The bottom line

We do not provide pension advice and we are not pension advisers. We introduce you to a carefully selected, FCA-regulated pension adviser. The introduction costs you nothing. If you go ahead, we may be paid a fee by that firm.