A SIPP is one of the most powerful wealth-building tools available to UK investors. And for anyone already lucky to be sitting on a £60,000 pension pot today, the journey to millionaire status might be much closer than they think.

So, how does it work? And what’s the smartest way to get there?

From £60k to £1m

At the stock market’s long-run average annual return of 8%, a £60,000 SIPP left untouched would compound into approximately £1,058,689.41 in around 36 years.

That’s a long time. But for younger investors, it means millionaire status just as they start reaching retirement age, all without adding a single extra penny.

Of course, most investors won’t stop contributing. And every additional payment made along the way shortens that timeline further. The real point is that time and compounding are doing the heavy lifting.

However, for those willing to pick quality individual stocks directly rather than simply track the market, this timeline to becoming a millionaire can be significantly accelerated.

Boosting investment returns

Few companies in the FTSE 100 better embody the kind of long-term compounding quality that can dramatically shorten the wealth-building journey than Halma (LSE:HLMA).

We know this because the specialist technology group has already proven itself to be a millionaire maker, averaging a total annualised return of 19.1% over the last 20 years – enough to transform a £60,000 initial investment into a whopping £2,655,166!

The company operates across three high-growth sectors: Safety, Environmental & Analysis, and Medical through a network of subsidiaries. Rather than running its divisions centrally, it operates a decentralised model, acquiring niche market leaders in essential industries and giving their management teams the autonomy to grow.

The results have been extraordinary. Halma has delivered 22 consecutive years of record adjusted profit – a feat that almost no other FTSE 100 company has matched. And with more tailwinds (like ageing populations, infrastructure safety, and environmental regulation) on the horizon, many institutional analysts continue to be optimistic for what the future might hold, even at today’s premium valuation.

So, what could go wrong?

Where’s the risk?

Halma’s decentralised acquisition strategy is its greatest strength. But it’s also a double-edged sword. If leadership begins to lose discipline in its dealmaking, overpaying for acquisitions or buying businesses outside its circle of competence, the compounding engine could stall.

There’s also meaningful currency exposure to consider. With operations spread across North America, Europe, and Asia, a sustained strengthening of sterling could weigh on reported earnings even when the underlying businesses are performing well.

For long-term SIPP investors, however, these risks feel manageable given Halma’s exceptional track record and the quality of its management team.

The bottom line

A £60,000 SIPP has genuine millionaire potential. And for patient investors prepared to back quality compounders for the long run, I think that journey could arrive far sooner than the index fund alone would deliver.

Halma could be among these winning businesses. But as already highlighted, there are risks that must be considered carefully. Nevertheless, its long track record has certainly caught my interest. And I think it’s a business worth investigating further.