Before you write a single word, you need to know whether your niche can actually make money. Not “could theoretically make money if everything goes right” — actually make money, in a way that makes the hours you’re about to put in worth it.
Here’s the thing I wish someone had told me: checking this takes an afternoon. It is not complicated. And I didn’t do it.
I launched Planet Houseplant in 2019, wrote consistently for over a year, hit $3,000 a month with Mediavine by November 2020 — and I never once sat down and thought seriously about monetisation beyond display ads. Ads were the plan. Ads were the whole plan.
It was the dream! Write and have money just turn up! Yessss.
It worked. Sort of. But I left a significant amount of money on the table because I didn’t think through my income routes before I started. And by the time I realised the ceiling was lower than it needed to be, I had a very established site built entirely around one revenue stream.
Don’t do that. Run the check first. Here’s how.
What does “profitable niche” actually mean?
It doesn’t mean “niche where other people are making millions.” It means a niche where you have multiple realistic ways to earn.
There are three main income levers for a niche blog:
Display ads — you get paid based on how many people visit your site. Mediavine, Raptive (formerly AdThrive), and Ezoic are the main networks. Ad income works in almost any niche, but the RPM (revenue per thousand visitors) varies significantly. Finance and health content tends to earn more per visitor than, say, houseplants.
Avoid Ezoic. I hear only bad things.
Affiliate products — you recommend products and earn a commission when someone buys through your link. This only works well if there are products in your niche that are genuinely worth recommending, with decent commission rates, that your audience is likely to buy.
Digital products and services — ebooks, courses, templates, coaching, consulting. This requires more effort to set up but has no traffic floor (or ceiling!)— you can start selling with a small audience if the product is good enough.
A resilient niche blog has at least two of these. Ideally all three. If you can only see one clear route from where you’re standing, that’s not necessarily a dealbreaker — but go in with your eyes open.
The thing I got completely wrong (and how it happened)
I didn’t consciously decide not to think about profitability. It was more that I kept not getting round to it, because it felt like extra work when I just wanted to write. Ads just seemed like the easiest best way to go about things and they could just handle the monetisation thing.
Aaaand they did handle it, to a point. But I hit a ceiling that I might have avoided.
The specific problem with houseplants as a niche is that the affiliate landscape is limited. There are products to recommend — soil, pots, tools, the occasional grow light — but nothing high-ticket that I was actually gonna use myself. And plant apps like Planta were the obvious gap. The affiliate commissions exist. People search for them. On paper, it made sense.
But plant apps, in my experience, are only useful once you already know what you’re doing. For a complete beginner — which is exactly who was finding my content — they’re more likely to give you a confident wrong answer than a useful one. I wasn’t going to recommend something I didn’t believe in to an audience that trusted me, just because it paid.
This happens SO OFTEN and it’s a false economy. Your audience’s trust is hard to win and easy to use. Don’t toy with it for a quick win.
The lesson: your monetisation options aren’t just “what can I promote” — they’re “what can I promote and actually stand behind.” Those two lists are sometimes very different. Know that before you start.
It does make getting started from scratch easier though. If you’re like ‘what on EARTH do I have to write about??’ Look around. What products do you already love? Airfryer? iPad? Cat litter box?
The five-point profitability check
Run through these before you commit to a niche. The whole thing takes an afternoon.
1. Are there affiliate products worth promoting?
Search “[your niche] + affiliate programme” and see what comes up. Then ask:
- Are these products I’d actually use and recommend?
- What’s the commission rate? (Under 5% on low-ticket items adds up slowly — high-ticket or recurring commissions move the needle faster)
- Are there products at different price points, so you’re not locked into only promoting one thing?
The trap: promoting products you don’t believe in to chase commissions. It works short-term. It kills trust long-term. DON’T DO IT.
2. Is there a clear problem people will pay to solve?
Not “are people interested in this topic” — are they spending money to solve a problem in this space? If people are already buying courses, tools, coaching, or premium products, that’s a signal the niche has financial depth. Your job isn’t to solve the problem for free forever. It’s to be the most useful guide — and eventually, to offer something worth paying for.
3. Could you create a digital product here?
Spend five minutes trying to think of three things you could sell: an ebook, a template, a mini-course, a printable checklist. If you can think of five without straining, the niche has depth. If you can’t think of one, that’s worth investigating — the niche may be too broad, or the audience may not be in buying mode.
Perhaps spend the afternoon on Gumroad or Etsy and see if any ideas start brewing.
You don’t need a fully formed idea straight away – just a general idea of a direction you could go in with paid products.
4. Are there display ad networks that will accept this content?
Most niches are fine. But anything adjacent to adult content, gambling, or certain health claims has restrictions with the major networks. It’s worth checking Mediavine and Raptive’s content guidelines early — not because you’re planning to break them, but because you want to know what you’re building towards.
It does NOT pay to be edgy when it comes to ad networks, though they won’t be there censoring all your swear words.
5. Could this extend into consulting or services?
Not everyone wants to do this and you don’t have to. But it’s a useful signal of niche depth. If someone would pay for your personal help on this topic, the knowledge gap is real and the audience values solutions. That same depth is what makes digital products viable too.
I’m sure there are people out there wanting to pay a houseplant expert, but I know the niche. It’s not the sort of thing that can be necessarily be diagnosed in a 30 minute Zoom call.
The niches that tend to be harder (go in with open eyes)
Some niches make the profitability check harder to pass — not impossible, but harder:
Broad lifestyle content isn’t a niche. Google can’t categorise it, affiliates can’t target it, and you’ll struggle to build the kind of specific authority that converts. only try this is you already have a large social following.
Very trend-dependent niches require constant output and constant updates to stay relevant. If your content is stale in six months, the maintenance cost is high.
Niches where the audience isn’t in buying mode — some topics attract readers who want free information and will never buy anything. This isn’t always obvious upfront. If the top-ranking content in your niche is entirely free guides with no products or services in sight, ask why.
Overcomplicated affiliate landscapes — niches where the only affiliate options are low-commission Amazon links on sub-£20 products. You’ll need significant traffic before ads alone make it worthwhile.
None of these are automatic disqualifiers. Planet Houseplant had some of these characteristics. But knowing about them early means you can plan around them.
What about niches that aren’t traditionally “high income”?
Here’s the nuance the “best niches” listicles always skip: a niche doesn’t have to be personal finance or technology to be profitable. It has to have depth, a reachable audience, and at least two income routes.
Houseplants isn’t a high-RPM niche. But it has a huge audience, strong Pinterest traffic, decent (if limited) affiliate options, and real potential for digital products I never built. The ceiling I hit was partly a ceiling of my own making — I just didn’t build the other income routes.
The pothos site is me trying to do it properly this time. Same broad topic, much tighter niche, and a monetisation plan that goes beyond ads from day one. More on that as it develops.
Your profitability checklist
Before you write your first article, tick these off:
- There are affiliate products in my niche I would genuinely recommend
- At least some of those products pay a meaningful commission
- There’s evidence that people in this niche spend money on solutions
- I can think of at least three digital products I could create here
- Display ad networks will accept my content
- I have at least two clear income routes, not just one
- I understand the ceiling — and I’m okay with it, or I have a plan to work around it
If you get through that list with most boxes ticked, you’re in good shape. If you get to the end and realise you’ve only got ads as a realistic option, either that’s fine with you (and you’ve got a traffic plan to make ads worthwhile) — or it’s worth adjusting the niche before you build an entire site around it.
Either way, now you know. That’s the whole point.
Next: once you’ve validated your niche is worth pursuing, Article #7: How to Niche Down Without Feeling Boxed In walks you through how to find the right level of specificity — narrow enough to rank, wide enough to sustain you.
Or if you’re not sure your niche is the right fit at all yet, go back to Article #5: How to Pick a Niche for Your Blog.