Section 24 restricts mortgage interest relief for individual landlords to the basic rate of tax, regardless of what rate they actually pay. For a landlord in the 40% or 45% bracket with a leveraged portfolio, that change turns a property that used to be modestly profitable into one that loses money on paper every year, even while the mortgage gets paid down. We've covered the mechanics of the tax itself in our Section 24 guide. This piece is about what happens next: where those landlords go, and how to find the properties they leave behind.
Why Section 24 creates a specific kind of seller
Not every landlord selling under Section 24 pressure is desperate. Some are simply rebalancing a portfolio, remortgaging into a limited company structure, or selling one property to pay down debt on the rest. But a meaningful subset are selling because the numbers no longer work at all — the property is cashflow-negative after tax, and staying in is actively costing them money every month it remains unsold.
That second group behaves differently to an ordinary vendor. They are not selling to buy something better. They are selling to stop a loss. That distinction is the entire basis of a BMV opportunity: a seller motivated by an ongoing cost of ownership, not by lifestyle or upsizing, will usually accept a lower offer if it closes faster and with less friction than a chain sale.
What a Section 24 exit actually looks like on a listing
Section 24 doesn't show up as a field in a property listing — no portal tags a property "seller exiting under Section 24." You have to infer it from the combination of signals, the same way motivation scoring works across PropertyAlert generally:
- Tenanted at listing, individual landlord, higher-value property. A tenanted flat or house above roughly £250k-£300k asking is more likely to belong to a higher-rate taxpayer than a lower-value one, simply on the maths of typical BTL yields and mortgage sizes.
- Long hold period, first sale in years. Section 24 was phased in from 2017 to 2020. A landlord who has held since before then and is only selling now is often responding to a specific trigger — a remortgage renewal at a much higher rate, a rent review that didn't cover the new interest bill, or simply finally doing the year-end sums and not liking them.
- Price reduced once, then left to sit. Vendors trying to escape an ongoing loss tend to price optimistically first, then cut once when it doesn't move, then wait for an offer rather than cut again. A single meaningful reduction followed by stagnant days-on-market is a different pattern to a seller who keeps chasing the market down.
- Portfolio landlord selling one of several. If a Land Registry title search or a Companies House filing shows the same seller name against multiple BTL purchases in the same period, you're looking at a portfolio landlord making a selective disposal, not someone selling their only rental.
The offer conversation is different
With a Section 24 exit, the number that matters to the seller usually isn't the asking price — it's the number that stops the bleeding. A landlord losing £300/month after tax on a property they've held for eight years is often more responsive to "we can complete in six weeks with no chain" than to a marginally higher offer that drags on for four months while they keep paying the shortfall. Ask directly, through the agent, how quickly the seller needs to complete. The answer tells you more about your negotiating room than anything in the listing description.
Run the numbers the same way you would for any other BMV target — see how to calculate true value before you rely on the asking price as a benchmark. A Section 24 exit doesn't automatically mean the price is soft; it means the seller's incentive to accept a fair-but-lower offer is stronger than usual. Verify the discount independently before you act on the motivation signal alone.
The honest limitation
Section 24 has been law for several years now, and the landlords for whom it was always going to be fatal have mostly already sold. What remains is a slower, steadier trickle — driven less by the original 2017 rule change and more by remortgage shock, as fixed rates from the low-interest-rate years roll off onto much higher ones. That means this is not a category of deal you'll find in bulk. It's a pattern worth recognising when you see it, not a search filter that returns a list.