The rate on a property bond isn't set by guesswork or generosity. It's priced, the same way any loan is priced, against a specific set of risk factors, and understanding what actually drives that number is a far better filter than simply comparing headline percentages across different bonds.
Term length
Locking money away for longer generally commands a higher rate, since investors are giving up access to their capital for an extended period and taking on more uncertainty about how the property market or the issuer's finances might change over that time. It isn't a perfectly straight line, though. Short-term bridging-style property loans sometimes pay high rates too, not because the term is long but because speed and certainty of funding matter more than cost to the borrower in that situation. Term alone rarely explains a rate on its own, but it's always one factor in the calculation.
Security ranking
Where a bond sits in the repayment queue matters enormously. A first fixed charge over a specific, identified property, registered at HM Land Registry, ranks ahead of most other creditors if things go wrong, and bonds secured this way typically offer a lower rate than those with weaker security. A second charge, sitting behind a bank or other senior lender, carries meaningfully more risk and is priced accordingly. Unsecured loan notes, with no registered charge over any specific asset at all, sit at the riskiest end and should, in a properly priced market, offer the highest rate of all to compensate.
Loan-to-value
Loan-to-value measures how much of the underlying property's value the bond, together with any debt ranking ahead of it, actually represents. A bond secured at 50% LTV has a much larger buffer against a disappointing valuation or a rushed sale than one at 80% or 90%. Lower LTV bonds can generally afford to offer lower rates and still find willing investors, because the downside scenario looks less severe. When a bond combines a high LTV with a high advertised rate, that combination is worth examining closely rather than treating as simply generous.
Developer and issuer track record
An issuer with a history of completed developments, bonds repaid on time and in full, and filed, reviewable accounts is a known quantity. That reduces uncertainty, and reduced uncertainty tends to translate into a lower rate, because the issuer doesn't need to pay a premium to attract investors who might otherwise be nervous. A newer company, or one without a track record that can be independently checked, usually has to offer more to compensate for that unknown, regardless of how good the underlying project might genuinely be.
How and when interest is paid
Interest paid monthly, quarterly or annually gives investors ongoing proof that the issuer can service the debt, and tends to be priced somewhat more conservatively than a rolled-up structure. Rolled-up interest, paid as a single sum with capital at maturity, is often advertised at a higher headline rate, partly because the number reflects compounding across the whole term and partly because the investor is taking on more risk by receiving nothing until the very end. The two aren't directly comparable just by looking at the percentage; it's worth working out the effective annual return in each case before assuming a rolled-up bond is simply the better deal.
- Rates meaningfully above this range aren't automatically fraudulent, but they always warrant a specific explanation, whether that's a longer term, weaker security, a subordinated position, or an early-stage issuer.
The principle that ties all of this together
A materially higher rate than comparable bonds is a signal of materially higher risk, not a bargain that's simply been overlooked by everyone else. Markets for private lending are reasonably efficient at pricing risk over time; an issuer offering well above what similar, similarly secured bonds pay is very rarely just being generous. It's compensating investors for something, and it's worth finding out exactly what before assuming the extra percentage points are free money. Some of the UK's most damaging bond collapses, including Blackmore Bond, examined in more detail here, involved rates that looked attractive in isolation but weren't matched by security or oversight strong enough to justify them.
A lower rate often signals
- A first charge with low loan-to-value
- An established issuer with a verifiable track record
- Regular interest payments rather than a rolled-up structure
A higher rate often signals
- A second charge, subordinated or unsecured position
- A newer issuer, or one with limited history to check
- Rolled-up interest, a longer term, or a genuinely higher-risk development
None of this means the highest-rate bond on the market is automatically wrong for every investor, or that the lowest-rate one is automatically safe. It means the rate is information, and reading it correctly means asking what specifically sits behind it. How a property bond actually works, mechanically is worth reading alongside this if the underlying structure isn't already familiar, and what to compare before choosing between bonds sets out the fuller checklist.
For a broader introduction to the asset class, our property bonds hub is the place to start. When you're ready to see what's currently available, our comparison tool lets you review eligible opportunities against criteria like these.
This article is general information only, not financial advice. Rates and risk on property bonds vary considerably between issuers, and anyone considering this type of investment should seek independent advice from an FCA-authorised financial adviser before committing any money.