“Passive income” has been stretched to cover almost any money that doesn’t arrive as a salary, which makes it nearly useless as a category. A useful definition needs a test, and there’s a simple one.

Stop for six months. What happens to the income?

If it keeps arriving roughly unchanged, it’s passive. If it decays, it’s semi-passive. If it stops, it’s a job. Possibly a good one, just not this.

The spectrum, honestly labelled

Genuinely passive: interest and dividends. Money in a savings account earns whether you think about it or not. The Bank of England held Bank Rate at 3.75% in July 2026, and competitive savings accounts price off that. This is real passive income, and its ceiling is set by how much capital you have, not by effort, cleverness, or a course.

Semi-passive: rental property. The income arrives monthly whether you work or not, right up until the boiler fails, the tenant leaves, or the regulations change. Landlords will tell you it is a business with quiet periods, not a passive asset.

Semi-passive: digital products. A template, a course, an app. Real leverage — you build once and sell many times — but the marketing never stops, the platform changes its rules, and the product dates. Income decays without attention.

Barely passive: content and affiliate income. A channel or a site can earn for years after publication, and it also erodes steadily without new work. Treat it as a decaying asset that needs topping up.

Not passive at all: most “passive income ideas” lists. Anything where your time is the input. Dropshipping is retail. Freelancing with recurring clients is freelancing.

The capital problem nobody leads with

Here’s why genuinely passive income is discussed so much more than it’s achieved: it scales with capital, and capital is the hard part.

At a 4% yield, £10,000 produces roughly £400 a year — about £33 a month. To produce £1,000 a month at that rate you need around £300,000. Those numbers aren’t discouraging so much as clarifying: the route to passive income runs through accumulation, and the accumulation phase is the long part.

Which is why the sequence for most people is the opposite of the marketing. Earn actively, clear expensive debt, accumulate capital, and then the passive income becomes meaningful. Skipping to the last step is what the courses sell.

Price the setup at your own hourly rate

The most useful discipline here is to count the build.

If a digital product takes 120 hours to create and earns £600 in its first year, that’s £5 an hour for year one, against US private-sector average hourly earnings of $37.62 in July 2026, or whatever an extra hour at your own job pays. It might still be worth doing if year two earns £600 for near-zero additional hours. That’s the actual case for leverage, and it depends entirely on whether the income persists.

So ask two questions before starting anything: how many hours to build, and what happens in year two? An honest answer to the second is what separates leverage from a badly paid job.

Where the deposit-based version fits

For the boring, genuinely passive end, the mechanics matter:

  • The rate is variable and follows the central bank loosely — why savings rates move covers the mechanism.
  • Protection is per licence: £120,000 per person under the FSCS since 1 December 2025, up from £85,000. Any guide still quoting the old figure is out of date.
  • The gap between an average account and a competitive one is large enough to matter more than most “passive income ideas” ever will, and capturing it takes one transfer.

That’s an unglamorous form of passive income and it’s the one that reliably works.

A working definition to keep

Passive income is what your capital or your assets produce. Active income is what your time produces. Most side hustles are active income with a flexible schedule, which is genuinely useful. Just judge it on its hourly rate rather than on a label.

The mistake isn’t choosing active income. It’s paying for a course that promised passive and delivered active, then concluding you did it wrong.