Here's a question that sounds impossible: how do roughly 350,000 New Zealanders aged 40-44 generate 2.9 million separate taxable income sources?

The maths seems broken. That's more than eight income sources per person. Nobody has eight jobs.

But the data is real, and the answer tells you everything about how New Zealanders actually earn their living in 2024. (Source: Stats NZ, taxable-income-sources)

Start with the obvious: your salary is one income source. If you freelance on weekends, that's two. Rental property? Three. KiwiSaver employer contribution? Four. You're already at four without breaking a sweat.

Now add the things people forget count as taxable income. That side hustle you run through an online platform. The director's fee from sitting on a community board. Interest from your savings account. Dividends from shares you bought years ago. ACC payments if you got injured. A small inheritance that generates returns.

Suddenly eight doesn't seem so strange. It seems normal for anyone in their early forties who's had two decades to accumulate income-generating assets and side arrangements.

The trend tells the real story. Back in 2020, this age group had 2.6 million income sources. By 2024, it hit 2.9 million. That's 318,000 new income sources in four years.

Some of that is population growth. More 40-somethings means more incomes. But the growth rate outpaces population. People aren't just earning more money. They're earning it from more places.

This is what financial diversification looks like at scale. It's not wealthy people with investment portfolios. It's ordinary Kiwis who've reached the stage of life where they own a home that's gone up in value, have maybe kept a rental after upgrading, do some consulting work alongside their main job, and have a KiwiSaver balance that's finally worth something.

The 40-44 bracket sits at a pivot point. Young enough to work full-time. Old enough to have accumulated assets. Experienced enough to command freelance rates. Established enough to have equity they can leverage.

Every additional income source is a small hedge against uncertainty. If one dries up, seven others keep running. It's not wealth. It's resilience.

And it raises an uncomfortable question: what happens to the generations behind them? Will today's 30-year-olds reach their forties with the same range of income sources, or has that ladder been pulled up? When housing is unaffordable and wages buy less, do you end up with fewer backup options, not more?

The data doesn't answer that. But it shows what middle-aged financial security looks like in 2024: not one good job, but eight different ways to keep the money coming in.