Generating a reliable passive income from the stock market doesn't have to be complicated.
Instead of trying to pick individual shares and time the market, investors can turn to exchange-traded funds (ETFs). These funds can provide instant diversification and easy exposure to groups of high-quality dividend-paying companies.
For those looking to earn passive income from their ASX investments, here are three ASX ETFs that could be worth considering this month.

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Betashares Australian Top 20 Equity Yield Maximiser Fund (ASX: YMAX)
The Betashares Australian Top 20 Equity Yield Maximiser Fund is designed specifically for income investors seeking higher distributions.
This ASX ETF follows an equity income investment strategy, holding a portfolio of the 20 largest blue-chip stocks on the ASX. To enhance income, it employs a covered call strategy, which generates additional cash flow beyond just dividend payments.
The team at Betashares recently recommended the ETF as a top option to counter falling dividend yields. The fund manager notes that the covered call strategy "performs well in a neutral or gradually rising market, allowing call options to generate income without stocks being called away too often, as has been seen in recent months."
With a trailing 12-month dividend yield of 7%, YMAX could be a great option for those seeking a high level of passive income.
Vanguard Australian Shares High Yield ETF (ASX: VHY)
For a diversified approach to high-yield ASX shares, the Vanguard Australian Shares High Yield ETF is another top option. This ASX ETF is built using broker research to select approximately 70 ASX-listed companies with above-average dividend yields.
Importantly, the fund is not overly concentrated in just banks and mining stocks. Instead, it takes a more balanced approach, investing in a broad range of industries. Among its top holdings are blue-chip shares such as BHP Group Ltd (ASX: BHP), Commonwealth Bank of Australia (ASX: CBA), Telstra Group Ltd (ASX: TLS), Transurban Group (ASX: TCL), and Wesfarmers Ltd (ASX: WES).
At present, the ETF offers a dividend yield of 5.15%.
BetaShares S&P 500 Yield Maximiser (ASX: UMAX)
Finally, for income investors wanting to diversify their income streams beyond the ASX, the BetaShares S&P 500 Yield Maximiser ETF provides an interesting opportunity.
This ASX ETF follows a similar income-focused strategy to YMAX but applies it to the US market. It holds positions in the top 500 US-listed companies, including global giants such as Apple, Microsoft, and Walmart.
By incorporating a covered call strategy, UMAX seeks to maximise income from these holdings.
At present, the ETF offers a 12-month trailing distribution yield of 4.1%. This could make it an attractive option for those looking to tap into Wall Street's dividend potential while maintaining a strong income focus.