In 2020, there were 2.57 million taxable income sources recorded for people aged 40-44. By 2024, that figure hit 2.89 million. That's an increase of 318,000 in just four years.

Here's the tension: New Zealand's entire population is only five million people. The 40-44 age bracket typically holds around 200,000 to 250,000 individuals at any given time. So how do you get 2.89 million income sources from a quarter-million people?

The answer reveals something crucial about how modern Kiwi workers actually survive. Each person in this age group isn't just holding down one job. They're juggling multiple income streams. The data counts every taxable income source separately: your salary, your side hustle, your rental property, your freelance work, your dividends.

This cohort is in their supposed peak earning years. They should be consolidating, climbing the ladder, settling into senior roles with solid salaries. Instead, they're diversifying like mad. In 2000, this age group recorded 1.47 million income sources. Twenty-four years later, it's nearly doubled.

Some of this is demographic shift. More people means more income sources. But the growth curve tells a different story. Between 2020 and 2024 alone, income sources grew by 12.3%. That's not population growth. That's not immigration catching up post-COVID. That's people in their forties scrambling to patch together enough income from multiple sources because one isn't cutting it anymore.

Think about what it means to be 40-44 right now. You've likely got a mortgage at rates that have doubled in two years. You might have teenagers eyeing university. Your parents are ageing and needing help. You're supposed to be saving for your own retirement, but your KiwiSaver contributions feel laughable against rising costs.

So you rent out the spare room. You do consulting work on weekends. You keep that directorship you thought you'd quit. You turn a hobby into an Etsy store. Each one shows up as a separate line in the tax data. Each one is another plate you're spinning.

The really stark bit? Between 2022 and 2023, income sources for this age group jumped by 90,000 in a single year. That's when inflation peaked, interest rates spiked, and the cost-of-living crisis stopped being a headline and became everyone's daily reality.

This isn't a story about people getting richer through multiple income streams. This is a story about people working harder just to stand still. (Source: Stats NZ, taxable-income-sources)