Just the other day, I watched my toddler climb all the way to the top of the big slide at soft play, then stand there for a good five minutes trying to decide whether she was actually brave enough to go down it. That hesitation, knowing what she wanted to do but not quite taking the next step, is exactly what financial inertia looks like in real life.
Most people assume the biggest threat to their long-term finances is bad markets, tax changes, or choosing the wrong investment fund. In reality? One of the most damaging forces is much quieter: doing nothing.
Morgan Housel said it best in The Psychology of Money: “Doing nothing is often the most reasonable option. But it’s rarely the most rewarding.”
Inertia doesn’t feel dramatic. It doesn’t feel risky. It’s just… not getting around to something. Not checking that pension. Not increasing the investment you’ve been “meaning to” increase for ages. Not putting firm retirement goals and plans in place.
But over years and decades, that quiet delay can be one of the greatest threats to building wealth and achieving your financial goals.
Let’s talk about what financial inertia looks like in the real world, why it happens, and how it quietly derails the goals people genuinely care about.
Why we get stuck
Behavioural economics has some brutally accurate names for the things our brains do when money is involved:
- Status quo bias: preferring things to stay as they are, even when change is objectively better.
- Choice overload: so many options that doing nothing feels safer.
- Loss aversion: we’d rather avoid the feeling of making a wrong decision than actually make a better one.
Put simply: our brains are wired for short-term comfort, not long-term optimisation. It’s not laziness, it’s human nature. Inertia is one subtle way our brains prioritise the short-term comfort over the long-term optimisation.
Real example 1: The old pension that time forgot
One of the most common forms of inertia I see is the “forgotten pension.” Someone pays in for years, often a decade or more, and never checks:
- What it’s invested in,
- What they’re paying,
- And, in many cases, whether it’s outperforming inflation.
A client I worked with recently had an older pension from a job in the early 2000s. He’d been contributing to it for years, assuming it was all ticking along nicely.
It wasn’t.
The fund was sitting in a sluggish, outdated investment strategy. The annual charges were significantly higher than modern pensions. And because he’d never reviewed it, the compounding damage was significant
Had he moved it or reviewed it just a few years earlier, he could potentially have been tens of thousands of pounds better off today. That difference alone could have shaved several years off his retirement age or made hitting his goals far, far easier.
He’s not unusual. I’ve seen people unknowingly invest in funds that have underperformed for a decade, purely because the process of switching felt overwhelming.
That’s financial inertia at its most expensive.
Real example 2: The “temporary” cash pile that stayed put
Another very normal one: the “temporary” cash stash.
Someone sells a house, receives a bonus, or gets an inheritance. They say:
“I’ll park it in the savings account for a few months while I think about what to do.”
24 months later, it’s still there. Its real value being eroded by inflation.
You don’t feel the erosion day by day, but compound loss works just as powerfully as compound growth, only in the wrong direction.
One client confirmed he’d had £200,000 sitting in cash for almost two years after downsizing, purely because he couldn’t decide what to do first: invest? Pay down the mortgage? Boost pensions? Something else?
He told me, “Honestly, I think I knew I should be doing something. But I was scared of doing the wrong thing.”
That’s inertia wrapped in fear, a classic combination.
On this, Housel notes “things that have never happened before happen all the time”.
Inertia doesn’t just cost money
When you add inertia up over a lifetime, it’s not just pounds and pence you lose.
It’s time.
Time to retire earlier. Time to work fewer days. Time to travel. Time to help your kids. Time to live life on the front foot, not reacting to financial pressure.
I’ve sat with people who say, “If only I’d sorted this five years ago…” And you can feel the frustration because they’re not just talking about money. They’re talking about lost options.
Inertia feels harmless
Here’s the behavioural trap: doing nothing doesn’t feel like a decision.
If someone asked, “Are you actively choosing to stay in a high cost, underperforming pension?” the answer would be no.
But by not reviewing it, that’s exactly what’s happening.
Inertia is dangerous because it feels safe, when in reality, it potentially leads to:
- higher charges,
- weaker performance,
- inefficient planning,
- and delayed goals.
Housel talks about how the biggest financial mistakes are often the ones you never notice until years later. Inertia is a perfect example: it’s silent, invisible, polite. It never panics. It just quietly compounds in the background.
Why inertia feels especially strong in money decisions
A few psychological reasons you may recognise:
1. Money feels “high stakes”
So we delay acting until we’re 100% sure. Except there’s never a moment where you feel 100% sure. So nothing changes.
2. We fear regret
We’d rather do nothing than make a decision we later question. Even though doing nothing is also a decision and often the more damaging one.
3. Some financial tasks feel admin-heavy
Pension logins, paperwork, tax rules, provider transfers… Most people would rather repaint their house than compare pension charges and funds.
4. We underestimate the cost of delay
If you asked someone, “What’s the cost of leaving your pension untouched for another year?” they might guess “a couple hundred quid.” Often it’s thousands.
5. We’re optimistic about “sorting it soon”
“Next year I’ll get around to it” is one of the most common phrases in personal finance. And, how often do we actually get around to what we’ve been putting off?
So how do you beat financial inertia?
Good news: you don’t need to become a money expert. You just need a few practical strategies to stop inertia in its tracks.
1. Make reviews automatic, not optional
If something relies on motivation, it usually loses. If it’s scheduled, it happens.
Annual reviews. Tax-year planning every March or April. Put them in the diary like dentist appointments, you may not want to go, but it stops bigger problems later.
2. Break decisions into tiny steps
Most people don’t delay decisions; they delay starting decisions.
Instead of “Sort out my pension,” try:
- Step 1: Find the log-in.
- Step 2: Check charges.
- Step 3: Review investments.
Smaller steps create momentum.
3. Create accountability
A financial planner’s job isn’t just numbers. It’s to keep you moving. To simplify decisions. To nudge you. To stop inertia setting in.
The best financial advice is often unexciting but consistently followed.
4. Decide your default action in advance
If left alone, inertia becomes the default. So choose a new default:
- “If I’m unsure, I’ll review with my adviser.”
- “If my cash builds above £X, I’ll invest the excess.”
- “If I change jobs, I’ll check existing pensions.”
Defaults are powerful.
5. Focus on future you
When we picture our future selves vividly, we act more decisively today. Think less about the admin of the task and more about the feeling of:
- retiring earlier,
- travelling more,
- helping your kids,
- working because you want to, not because you have to.
That’s the payoff for taking action.
Final thought: small decisions compound. So does not deciding
Most people think compounding only applies to investments. But it also applies to decisions. Good decisions compound. Bad decisions compound. Indecision compounds too.
The families who retire comfortably, hit their goals early and feel in control of their money aren’t the ones who make perfect decisions.
They’re the ones who avoid long periods of doing nothing.
One small financial action today, such as reviewing a pension, moving cash, or updating a plan, can be worth years of freedom later.
And the longer you stay stuck, the more expensive it could become.
So, if you’ve been meaning to act on something financial… this might be your nudge.
Please note:
This article is for general information only and does not constitute advice. The information is aimed at retail clients only.
All information is correct at the time of writing and is subject to change in the future.
The value of your investments (and any income from them) can go down as well as up and you may not get back the full amount you invested. Past performance is not a reliable indicator of future performance. Investments should be considered over the longer term (minimum of 5 years) and should fit in with your overall risk profile and financial circumstances.
A pension is a long-term investment not normally accessible until 55 (57 from April 2028). The fund value may fluctuate and can go down, which would have an impact on the level of pension benefits available. Past performance is not a reliable indicator of future performance.
The tax implications of pension withdrawals will be based on your individual circumstances. Thresholds, percentage rates, and tax legislation may change in subsequent Finance Acts.
If this article has raised any questions for you, feel free to get in touch!
Written by Freddie Barton, Independent Financial Adviser at Flying Colours