The psychology of money: why smart people make bad financial decisions

The short answer: Most money slip-ups come from how our brains work, not a lack of knowledge. Four habits do most of the damage: putting off the future, fearing losses, spending to feel better and sticking with past choices. The fix is a default. In 2026/27, a workplace pension puts in at least 8% of qualifying earnings without you lifting a finger.

Why do smart people make bad money decisions?

Because money choices are made by the same brain that wants a biscuit now rather than two later. Being clever doesn't switch that off. Researchers call it "temporal discounting": people value immediate gains over future gains.

Economists take this seriously. Daniel Kahneman won the 2002 Nobel Prize in economics for bringing psychology into economics, especially how people judge and decide when things are uncertain.

It shows up in the numbers too. The Department for Work and Pensions (DWP) estimates that 38% of working-age people, about 12.5 million, are undersaving for retirement. That's measured against the income they'd need to keep a similar standard of living later.

The table sums up the four habits, with a simple default for each.

These are general ideas, not personal recommendations. What suits you depends on your own situation.

A workplace pension is one of the best-known defaults, and tax relief adds to what you pay in. Both come up below.

Capital at risk. The value of your pension can go down as well as up, and you may get back less than you pay in.

Tax treatment depends on the individual circumstances of each client and may be subject to change in future.

What does present bias mean, and why does future you feel like a stranger?

Present bias means giving more weight to what feels good now than to what helps you later. It's why booking a holiday feels urgent and saving for retirement doesn't.

Brain scans help explain it. In a 2009 study, people rated their current self and their future self while in a scanner. The bigger the gap in brain activity between the two, the more they preferred smaller, sooner rewards a week later. Put simply, the less you feel like your future self, the harder it is to save for them.

The good news is that this can shift. In four studies, people who saw realistic aged images of themselves were more likely to choose later money over money now. The same research notes that deciding in advance takes the lure of "now" out of the picture.

That's what automatic enrolment does. Your employer must put you into a workplace pension if you're aged between 22 and State Pension age and earn at least £10,000 a year (other conditions apply). You don't have to decide anything, so present bias doesn't get a vote.

And it works. In 2025, around 90% of eligible employees were saving into a workplace pension, about 22.6 million people.

If you pay into a personal pension, the default can be a regular payment set for payday. With relief at source, your provider claims tax relief at the basic 20% rate and adds it to your pot. Our guide to personal pension tax relief explains how that works.

Why does losing £20 hurt more than gaining £20?

Because we feel losses more strongly than gains of the same size. In his Nobel lecture, Kahneman explained that most people turn down a 50/50 bet unless the possible win is at least twice the possible loss. Losses weigh about 2 to 2.5 times as much.

So we often avoid decisions that feel risky, even when doing nothing has its own cost. Old pension pots are a good example. The Pensions Policy Institute estimates there are 3.3 million lost pension pots, holding £31.1 billion.

Ways to work with loss aversion:

• Ask what doing nothing costs. Leaving a pot alone is a choice too.

• Make the first step small. Finding an old pot isn't the same as moving it. GOV.UK's free Find pension contact details service helps you track down a scheme. It won't tell you whether you have a pension or what it's worth, so you'd then contact the scheme.

• Read up before you decide. Our beginner's guide to pension consolidation covers what to check before moving anything.

Help is on the way here too. The Pension Schemes Act 2026 will let small pension pots be brought together automatically, so they're easier to keep track of.

Why do we spend money when we're stressed or bored?

Because wanting something sets off the brain's reward system before you've even paid. In one study, liking a product activated a reward area of the brain called the nucleus accumbens. That activity helped predict whether people bought it.

So an after-work treat isn't a sign that you're bad with money. Your brain has learned that buying brings a quick lift.

Things that can help:

1. Notice when you shop. Is it after a long day, or when you're bored on your phone?

2. Ask yourself one question: "Am I buying this, or soothing something?"

3. Look at where your money actually goes. MoneyHelper's free Budget planner adds up your income and outgoings and shows what's left over.

If your income changes month to month, the Budget planner lets you enter a yearly figure and it works out the monthly average.

What is the sunk cost fallacy, and how does it cost you money?

The sunk cost fallacy is sticking with something because of what you've already put in, rather than what it gives you now. Past spending is a receipt, not a reason to carry on.

Subscriptions are the everyday version. The government estimates that people spend £1.6 billion a year on unwanted subscriptions, across about 9.7 million subscriptions people don't want. New rules to make cancelling easier are expected to start in spring 2027.

A useful question: "If I hadn't already paid for this, would I choose it today?" If the answer is no, it may be time to let it go. Our look back at common financial regrets has more patterns like this.

What is the 24-hour rule for spending?

It's a simple pause: if you want something you don't need, wait 24 hours before you buy it. The urge often fades, and if it doesn't, you buy it knowing you really wanted it.

You can still buy it. The wait gives the thinking part of your brain time to catch up with the excited part.

Example: how a default does the work for you

Here's a made-up example to show how a workplace pension default adds up. Sam earns £30,000 a year and is enrolled at the legal minimum.

Minimum contributions are 5% from you (including tax relief) and 3% from your employer. They're based on earnings between £6,240 and £50,270.

Illustrative only. Assumes minimum contributions, a scheme that uses qualifying earnings and relief at source for a basic-rate taxpayer. Some schemes work differently. This doesn't include investment growth or charges.

Sam doesn't have to remember anything. The money goes in every payday, and half of it comes from the employer and tax relief rather than Sam's pay. To see how different amounts could add up over time, try our flexible pension calculator.

What can I do now?

Everyone's situation is different, so we can't say what's right for you. What we can do is point you to some free checks that take a few minutes each:

1. Check your State Pension forecast. GOV.UK's free State Pension forecast shows how much you could get, when, and whether you can increase it. Our UK State Pension guide explains the basics.

2. Look up old pensions. Use Find pension contact details for any old workplace schemes.

3. Run a budget. MoneyHelper's Budget planner shows where your money goes.

4. List your subscriptions, and ask the "would I choose it today?" question for each one.

5. Get free guidance. MoneyHelper offers free, impartial pension guidance, and Pension Wise appointments if you're 50 or over.

Still got questions?

Can I opt out of my workplace pension? Yes. If you opt out within a month of being added, you get back what you've paid in. Later than that, the money usually stays in your pension until you retire. Your employer will normally re-enrol you every 3 years.

Can my employer ask me to opt out? No. GOV.UK says employers cannot encourage or force you to opt out.

I'm self-employed. Is there a default for me? Automatic enrolment comes from an employer, so if you work for yourself nobody does it for you. You can set up your own regular payment into a personal pension. Tax relief applies on payments up to 100% of your earnings.

Is there a limit on how much I can pay into a pension? You can pay in more, but tax relief has limits. The annual allowance is £60,000 in 2026/27. If you have no earnings, you can get relief on up to £2,880 a year.

Does knowing about these biases stop them? Not on its own. That's why the research points to deciding in advance. Automatic payments and pauses work even on days when willpower doesn't.

Where can I get free help with money worries? MoneyHelper is free and impartial. Its Budget planner also links to guides if you're overspending or dealing with debt.