Building a $100,000 ASX share portfolio isn't as hard as you might think. With the right strategy and a disciplined approach, it is more than possible.

And potentially achievable sooner than you think. Here are five steps for Aussie investors to take:

Step 1: Set clear investment goals

Before you start investing, it is important to understand your objectives. Are you investing for long-term wealth building, passive income, or a combination of both? Setting clear goals will help guide your ASX share selection and risk tolerance.

If your aim is to grow your capital over time, you may want to focus on quality growth stocks. If income is a priority, ASX blue chips with strong dividends could be more suitable. Having a clear roadmap will ensure that your portfolio is aligned with your financial goals.

Step 2: Commit to regular investing

One of the best ways to reach a $100,000 portfolio is through consistent investing.

Instead of trying to time the market, consider using dollar-cost averaging. This involves investing a set amount at regular intervals, such as $500 or $1,000 per month.

For example, if you are in a position to invest $1,000 every month and achieve an average annual return of 10% (which is in line with historical stock market averages), you could reach $100,000 in just over six years. The key is consistency.

Step 3: Diversify with quality ASX shares

Diversification is crucial for reducing investment risk with ASX shares. Instead of putting all your money into one stock, spread your investments across different sectors and industries.

A well-balanced portfolio might include growth stocks like Xero Ltd (ASX: XRO) or WiseTech Global Ltd (ASX: WTC), dividend stocks like BHP Group Ltd (ASX: BHP) and Telstra Group Ltd (ASX: TLS), or ASX exchange-traded funds (ETFs) such as the Vanguard Australian Shares Index ETF (ASX: VAS) or Betashares Nasdaq 100 ETF (ASX: NDQ).

Step 4: Reinvest your dividends

Unless you are investing specifically for income, it can literally pay to reinvest your dividends.

By doing so, you can use the funds to buy more shares, compounding your returns over time.

Some companies even offer dividend reinvestment plans, which allow you to be paid out in shares rather dividends. This saves on brokerage costs.

Step 5: Stay patient and avoid emotional investing

The biggest mistake investors make is reacting emotionally to market fluctuations. Selling in a panic during downturns or chasing hype stocks can derail your progress. Instead, focus on the long term and stick to your strategy.

Markets will have ups and downs, but quality ASX shares tend to recover and grow over time. By staying invested, taking advantage of compounding, and making informed decisions, you'll give yourself the best chance of reaching that $100,000 milestone.