A $5,000 investment can be more than enough to start building income in the share market.
But where should you start?
Here are three ASX dividend shares that could be worth buying in May.

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APA Group (ASX: APA)
The first ASX dividend share that could be a buy is APA Group.
It owns and operates energy infrastructure, including gas pipelines, storage assets, and related infrastructure across Australia.
The appeal here is that its earnings are tied more closely to contracted infrastructure usage than short-term movements in commodity prices. Gas still has a role to play in energy security, industrial demand, and firming electricity supply as renewable generation increases.
That gives APA a different type of income profile from traditional energy producers. It is more about the pipes and networks that move energy around the system.
With long-life infrastructure assets and contracted cash flows, APA remains a share that income-focused investors may want to keep on the radar.
Dicker Data Ltd (ASX: DDR)
Another ASX dividend share worth looking at is Dicker Data.
It is a technology distributor that connects major global vendors with resellers across Australia and New Zealand. Its partners include companies across hardware, software, cloud, cybersecurity, and infrastructure.
This makes it a different income idea from the usual banks, telcos, and infrastructure names. Dicker Data sits in the middle of the technology supply chain, benefiting as businesses continue to spend on digital systems.
The company has historically returned a large portion of earnings to shareholders through dividends, making it one of the more generous dividend payers on the local market.
For investors comfortable with a more cyclical income stream, Dicker Data offers dividend exposure linked to technology spending rather than consumer spending.
Rural Funds Group (ASX: RFF)
A third ASX dividend share that could be a top pick for income investors is Rural Funds Group.
It owns agricultural assets, including farmland and related infrastructure, which are leased to high-quality operators across different parts of the agriculture sector.
This structure gives investors exposure to farmland income without having to operate farms directly. Rental income is the key driver, while the underlying assets remain connected to long-term demand for food and agricultural production.
Weather, interest rates, and tenant performance can all influence sentiment toward the stock. But for investors seeking income from a less conventional part of the ASX, Rural Funds offers something different.