How to build a $500,000 self-managed superannuation fund

I think building a $500,000 self-managed superannuation fund (SMSF) could be achieved through regular investments, sensible diversification, controlled costs, and giving a portfolio enough time to compound.

Here is how I would approach it.

Make sure an SMSF is worthwhile

An SMSF provides greater control over where retirement savings are invested. However, trustees also take responsibility for the fund's administration and compliance.

This includes arranging the accounts, tax return, independent audit, and investment strategy. Moneysmart notes that an SMSF can cost more to operate than an industry or retail super fund.

A larger balance can make fixed administration costs easier to absorb. But I would still want a clear reason for choosing an SMSF, such as greater investment control, and confidence that I could manage the ongoing responsibilities.

Keep adding money

Regular contributions can accelerate the journey towards $500,000, particularly during the early years when the investment balance is still growing.

The concessional contribution cap is currently $32,500, while the non-concessional cap is $130,000. Employer contributions count towards the concessional limit, so investors should check how much has already entered their super before adding more.

For example, someone starting with $100,000 who contributes $20,000 at the end of each year and earns an average return of 8% would have over $500,000 after 10 years.

Investment returns will vary from year to year, but this example shows how regular contributions and long-term compounding can work together to build a much larger balance.

Which ASX shares would I buy for an SMSF?

I would look for quality businesses that can grow over many years while providing exposure to different parts of the economy.

Wesfarmers Ltd (ASX: WES) would be one of my first choices. Its retail, health, industrial, data, and lithium interests give the company several ways to grow. I also rate its history of disciplined capital allocation, which is particularly valuable when investing retirement savings for the long term.

I would also consider Macquarie Group Ltd (ASX: MQG). Its asset management, banking, commodities, and financial markets operations provide exposure to global growth rather than relying entirely on the Australian economy. I think Macquarie's ability to adapt and invest across changing market conditions could support strong returns over a long holding period.

Goodman Group (ASX: GMG) could add another source of growth. The company owns and develops logistics properties and data centres in major global cities. Its access to land, power, and capital has positioned it to benefit as demand for digital infrastructure increases.

I would balance those growth businesses with a more defensive company such as Coles Group Ltd (ASX: COL) or Woolworths Group Ltd (ASX: WOW). Demand for groceries should remain relatively steady across economic conditions, while its investments in automation, online shopping, and supply chain efficiency could support earnings and dividends over time.

These are five examples I would be comfortable owning in an SMSF with a long investment horizon. The final mix would depend on the fund's investment strategy and how much exposure it already had to each sector.

Foolish takeaway

There are many possible paths to a $500,000 SMSF, and the right investment mix will depend on the member's age, goals, and tolerance for market falls.

For me, the foundations would be regular contributions, broad diversification, reasonable fees, and a long investment horizon.

I believe a portfolio built around these principles could give compounding the time and capital needed to produce a substantial retirement balance.