The power of compounding: What your ASX share portfolio could become by 2040

Let's see how much could be made by investing in ASX shares over the next 12 years.

Smiling young parents with their daughter dream of success.

Images source: Getty Images

You’re reading a free article with opinions that may differ from The Motley Fool’s Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn More

If there's one force in investing that deserves more attention, it is compounding.

In simple terms, compounding is when your returns start generating returns of their own. And over time, that snowballs into something pretty remarkable.

So, what happens when you combine compounding with a long-term mindset, a regular investment plan, and a healthy dose of quality ASX shares?

Let's take a look.

The ASX share plan

Let's imagine you're starting with $10,000 in savings and can invest $500 a month into the share market. You're committed to this strategy until 2040, which gives you 15 years of consistent investing.

And while nothing in the market is guaranteed, we'll assume a 10% average annual return, which is in line with historical long-term returns for the Australian share market, including dividends.

Here's what that could look like:

  • Starting amount: $10,000
  • Monthly investment: $500
  • Time horizon: 15 years
  • Annual return (assumed): 10%

By 2040, your ASX portfolio could grow to a jaw-dropping $240,000+ — built from $100,000 of total contributions and over $140,000 in growth alone. That's the magic of compounding in action.

The key? Quality

Of course, achieving strong long-term returns depends on where you invest. For those confident in picking individual stocks, companies like Goodman Group (ASX: GMG), TechnologyOne Ltd (ASX: TNE), ResMed Inc. (ASX: RMD) and CSL Ltd (ASX: CSL) have proven themselves over time with durable competitive advantages, solid earnings growth, and shareholder-friendly policies.

But if you prefer a simpler approach — or just want to sleep well at night — ASX ETFs offer a fantastic alternative.

Easy diversification with ETFs

Rather than picking stocks, you can buy entire baskets of them through exchange-traded funds. Here are a few ETFs that could help form the foundation of a quality-focused, long-term ASX portfolio.

The Vanguard Australian Shares Index ETF (ASX: VAS) gives you broad exposure to Australia's largest companies, including banks, miners, healthcare, and more. The Betashares Australian Quality ETF (ASX: AQLT) targets high-quality Aussie businesses with strong financials and consistent earnings — a great tool for compounding. And the VanEck Morningstar Wide Moat ETF (ASX: MOAT) offer access to US companies with strong competitive advantages. Perfect for adding global exposure with a quality tilt.

Foolish takeaway

It is easy to feel overwhelmed by day-to-day market noise. But long-term investing doesn't need to be complicated.

Start with what you can. Stay consistent. Focus on quality. And give compounding the time it needs to work its magic.

With a simple plan — like investing $500 a month and letting it grow — your ASX portfolio could transform your financial future by 2040. The hardest part? Getting started. But the sooner you do, the better the results could be.

Wondering where you should invest $1,000 right now?

When investing expert Scott Phillips has a stock tip, it can pay to listen. After all, the flagship Motley Fool Share Advisor newsletter he has run for over ten years has provided thousands of paying members with stock picks that have doubled, tripled or even more.*

Scott just revealed what he believes could be the 'five best ASX stocks' for investors to buy right now. We believe these stocks are trading at attractive prices and Scott thinks they could be great buys right now...

See The 5 Stocks *Returns as of 3 April 2025

Motley Fool contributor James Mickleboro has positions in CSL, Goodman Group, ResMed, Technology One, and VanEck Morningstar Wide Moat ETF. The Motley Fool Australia's parent company Motley Fool Holdings Inc. has positions in and has recommended CSL, Goodman Group, ResMed, and Technology One. The Motley Fool Australia has positions in and has recommended ResMed. The Motley Fool Australia has recommended CSL, Goodman Group, Technology One, and VanEck Morningstar Wide Moat ETF. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Scott Phillips.

More on How to invest

Man drawing an upward line on a bar graph symbolising a rising share price.
How to invest

The power of compounding: What $1,000 a month in ASX shares could become

Compounding is your best friend in the world of investing.

Read more »

$100 Australian notes on top of each other.
How to invest

How to build a winning $250,000 ASX share portfolio starting from zero

These are the steps I would take to grow wealth with ASX shares.

Read more »

Legendary share market investing expert and owner of Berkshire Hathaway Warren Buffett
How to invest

5 Warren Buffett quotes to become a better ASX share investor

It could pay (literally) to listen to the Oracle of Omaha's words of wisdom.

Read more »

A young man sitting at an outside table uses a card to pay for his online shopping.
How to invest

The ASX is on sale! Here's how I'd build a portfolio for the next decade

This is what I would do if I were starting out again with ASX shares.

Read more »

A man sleeps in a bed with white sheets while holding a teddy bear and a smile on his face.
How to invest

How I'd invest in ASX 200 shares if I wanted to sleep well during market volatility

Investing can be stressful but it needn't be.

Read more »

Gold bars on top of gold coins.
Gold

What are my options to invest in gold on the ASX?

How can I take advantage of gold’s record run with ASX shares?

Read more »

Diverse group of university students smiling and using laptops
How to invest

Beginner investor? Here's how I'd invest $1,000 in ASX shares

If you are just starting your investment journey then this could be the way to do it.

Read more »

Happy young couple saving money in piggy bank.
How to invest

What I'd buy if I wanted to turn $10,000 into $100,000 with ASX shares

This is how I would go about growing a $100,000 investment portfolio.

Read more »