See how cash-on-cash return differs from rental yield. Deposits, fees, leverage, and stress tests explained with a simple framework to compare two properties.
What is rental yield?
Rental yield is usually the first number people look at when a deal pops up. It’s quick to work out and gives you a rough idea of whether a property is even worth a second look.
All you’re really doing is taking the yearly rent and comparing it to the purchase price. Simple enough.
It’s useful for scanning through listings, especially if you’re looking at a few areas at once. After a while, you get a feel for what’s “normal” and what stands out.
But it is just a rough guide. It doesn’t know how you’re buying the property, and it doesn’t care about your actual costs. So it’s helpful, but only up to a point.
What is Cash-on-Cash return?
Cash-on-cash return is where things get a bit more real.
Instead of looking at the property price, it looks at the actual cash you’ve put into the deal, and what you’re getting back from it each year.
So that’s your deposit, stamp duty, legal fees, maybe some refurb costs… basically everything you had to pay to get the property up and running.
Then you compare that to what’s left after the mortgage and other costs are covered.
It’s a slightly slower calculation, but it feels more personal. You’re not just asking “is this a good property?” you’re asking “is this a good use of my money?”
Cash-on-cash return vs rental yield: the core difference
The easiest way to separate the two is this:
Rental yield is about the property. Cash-on-cash return is about you.
You can have two properties with the exact same yield, but if one needs a bigger deposit or more work upfront, your actual return can end up looking very different.
That’s usually the point where people start leaning more towards Cash-on-cash return. It just lines up better with how the deal actually feels in real life.
How deposits and leverage affect Cash-on-cash return
This is where Cash-on-cash return starts to get interesting.
If you’re using a mortgage, you’re not buying the whole property with your own money, you’re putting in a portion and borrowing the rest. That’s where leverage comes in.
Sometimes, using less of your own cash (for example, a smaller deposit) can actually improve your return. Not always, but when the rent comfortably covers the mortgage, it can work in your favour.
Of course, there’s a balance. Lower deposit usually means higher monthly payments, so the deal still has to stack up.
But once you start looking at deals this way, you naturally begin comparing them based on how efficiently they use your cash, not just how they look on paper.
The impact of fees and real-world costs
This is usually the bit people don’t fully account for at the start.
On paper, the numbers can look great. But once you actually own the property, the smaller costs start showing up: letting fees, bits of maintenance, insurance, the odd month without a tenant. None of it is dramatic on its own, but it does add up over the year.
Rental yield doesn’t really show any of that, which is why it can feel a bit optimistic sometimes. Cash-on-cash return handles it better, simply because you’re working from what’s actually left in your pocket after everything’s paid.
It’s not about being negative, it just gives you a steadier, more honest baseline to work from.
Stress testing and why it matters
Stress testing is one of those things that doesn’t seem important… until it suddenly is.
Lenders aren’t just looking at today’s rates, they’re checking whether the deal would still hold up if rates were higher. So even if a property looks solid based on rental yield, it might not quite fit once those checks are applied.
In some cases, it just means putting in a bit more deposit. In others, it changes the deal entirely.
Either way, it feeds back into your Cash-on-cash return, because your upfront cash and financing setup end up shifting slightly.
It’s not a bad thing, though. If anything, it forces you into safer deals, and over time, that tends to work in your favour.
A simple way to compare two properties
When you’re looking at two deals side by side, it helps to not overcomplicate it.
Use rental yield first, it’s quick and helps you filter things out.
Then, once something looks promising, switch to Cash-on-cash return and ask yourself: how much am I putting in, and what am I actually getting back each year?
That one question tends to clear things up pretty quickly.
Using a property investment calculator is also very useful.
Final thoughts on Cash-on-cash return and rental yield
You don’t really have to pick one over the other.
Rental yield is great for speed. Cash-on-cash return is better for accuracy.
Used together, they give you a much clearer picture of what’s going on. And after a while, you stop overthinking it, it just becomes part of how you naturally assess a deal.
And that’s when things start to feel a lot more straightforward.
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