How Landlords Turn Small Deposits into Dynastic Wealth

Interestingly, a slightly more cautious approach can still obtain dramatic results. Imagine if that £100k from 25 years ago is converted into £6m. If you could leave, in several years time, £5m to your children if they can also multiply it by 50 times when they retire it would leave £250m to your grandchildren. If that was repeated by the next generation too…….

Reality requires us to also factor in S24 impact (adding may be 20% or 25% to your tax bill at least) and some very careful selection of properties to maintain a strong income stream during ownership. But it remains more difficult at present.

Reply to the comment left by at 20/09/2025 – 10:13
That’s a really interesting perspective, thank you for sharing it. You’re quite right that even a cautious approach can deliver impressive results over time.

A couple of points are worth adding:

Section 24: as you say, careful property selection is crucial, but Section 24 really only bites where there’s mortgage finance. For those running without debt, there is no impact. The challenge then becomes whether compounding can still be maximised without leverage.

Inheritance Tax: this is often the silent killer. Growing wealth is one thing, but passing it down efficiently is another. Without the right structure, up to 40% could be lost to HMRC at each generational transfer. That’s why many landlords now look at FICs and other planning tools, not to accelerate growth, but to protect it once achieved.

So yes, cautious compounding absolutely works, but without addressing IHT and structural risks, the long-term outcome may be very different to the theory. That’s the piece many landlords are now rethinking.

Reply to the comment left by Mark Alexander – Founder of Property118 at 19/09/2025 – 18:14
Not everyone wants to pass it to the next generation, as next generation can look after themselves if they work as hard as we have.

Reply to the comment left by Tiger at 20/09/2025 – 10:34
Tiger, that’s a perfectly valid point of view — and I think many landlords feel the same way. You’ve worked hard, you’ve built your own future, and you don’t feel the next generation should be handed everything on a plate.

The trouble is, unless steps are taken, the ‘next generation’ still gets involved whether we want them to or not. This is because HMRC takes up to 40% in inheritance tax when assets are left unplanned. So it’s not really a choice between giving it to the kids or keeping it for yourself; without planning, a very large share simply goes to the taxman.

For some, the motivation for structures like FICs isn’t about enriching children, it’s about making sure wealth isn’t lost unnecessarily and can be directed where you want it, whether that’s family or other causes.

Reply to the comment left by david porter at 19/09/2025 – 17:42
David, for us, we started about 30 years ago, and stopped buying 9 years ago for various reasons. We have a large ish portfolio The overall value has more than doubled, some early ones have tripled. For someone that continued to buy, anything bought in the last 5 years may not have increased by much, if at all.

I would say £159m, half might be growth with 24% CGT for higher rate payers. So roughly £80m x 24% CGT = £19.2m tax.

Portfolio value, minus debt, minus CGT = profit.
£160m – £120m – £19.2m = £20.8m in the bank to scrape a living on.

Reply to the comment left by Robin Wilson at 19/09/2025 – 22:30
Yes they can.

A share in an Interest in Possession is included in a beneficiary’s estate for IHT purposes.

Discretionary trusts are subject to an IHT charge every 10 years, if their value exceeds £325k.

Still, with careful planning they can be useful.

Reply to the comment left by Ryan Stevens at 20/09/2025 – 14:54
Ryan, you’ve raised some good points about Interests in Possession and the 10-year charges on discretionary trusts. These rules are exactly why so many landlords find trusts complicated, they can help, but without careful structuring the IHT exposure isn’t solved, it’s just shifted.

That’s one of the reasons we put together our free guide on Family Investment Companies. It explains how growth can be captured outside the founder’s estate without falling into the usual trust traps, and why this approach is becoming more common in the landlord community.

If you haven’t already downloaded it, I’d really recommend taking a look. It covers these issues in far more detail than we can do justice to in a comment thread.

Reply to the comment left by Colin Dartnell at 20/09/2025 – 14:29
Colin, I think you’ve summed it up really well. Once you run the numbers, it becomes clear why most landlords would not want to sell the entire portfolio and hand over such a large slice to HMRC.

That said, some landlords do eventually decide to sell a portion, say a quarter or a half. Working on the same example, this could generate say £5m–£10m before tax to fund a very comfortable retirement, while leaving the rest of the portfolio compounding away for the next generation. That way, you get the best of both worlds: comfort in retirement and a substantial legacy later. from my perspective, this is the benefit of ‘delayed gratitude’.

Others stop expanding after a few decades or so, let capital growth reduce their LTV over time, and allow inflation to steadily improve their rental profits.

It all comes down to personal goals and whether the priority is income, security, or legacy. The key thing is that there are options once you’ve built up the scale.

Thanks Mark, what nice illustration of how the leverage and inflation can work together to create wealth, especially when profits are reinvested along the way.
For lay investors, property is one of the only asset classes where we have access to leverage.
However, the gains are very sensitive to the gearing and to the inflation rate.
Take Mark’s example of 6%. That means it would take about 12 years for prices to double. Over 35 years, that implies values could rise nearly eightfold.
Such growth is unlikely to repeat, since structural drivers such as the rise of dual-income households have largely run their course. Of course predicting long-term houseprices is a mug’s game, but t’s hard to imagine growth much faster than CPI. Affordability caps are real, even with the coming wealth transfer from older to younger generations.
A simpler way to frame Marks example: For every cycle in which property values double, you can probably comfortably refinance once, around the 1/2 way mark.
Consider £100K invested at 75% gearing:
Scenario 1: No reinvestment
• Initial £400K property doubles to £800K.
• Loan remains £300K.
• Equity grows to £500K. In today’s terms (after prices double), that’s £250K—a strong real return, hard to find elsewhere.
Scenario 2 : One reinvestment
• Refinancing once roughly midway through the doubling cycle.
• Final equity: £750K—about 50% higher than Scenario 1.
(If this process is repeated across multiple doublings—as in Mark’s example—you can do much better. But an eightfold rise in house prices within a lifetime seems unrealistic.)
Now compare with 60% gearing:
• Scenario 1: Equity ends at £350K (£175K in today’s terms).
• Scenario 2: Equity rises to £414K (£208K in today’s terms).
Both still deliver solid real returns, though the relative advantage of refinancing is smaller at lower gearing.

Higher gearing means higher rewards, but also higher risks. By the sentiments I see in response to Mark’s post, landlords are worried about risks, and that probably means being more careful about high gearing.

Reply to the comment left by David Mensah at 18:53

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Just to add, if you refinance, and gear at 75%, then you get about a 7.5 fold increase in equity over one doubling.

In Mark’s case of nearly 3 doublings that woulld be 7.5*7.5*7.5 =422, turning your 100K into about 42M. So a similar number to what he has.

If you don’t refinance, it is only [sic] a 5-fold increase the first doubling period, and then less because your effective gearing goes down. Over 3 doublings, you house would be worth 3.2M, your loand 300K, and you would be left with 2.9M. Still nice, but much less than in the refinancing scenario.