Most property developments do not fund from a single source. Senior debt covers the bulk of the cost, the developer puts in some cash, and there is almost always a gap between the two. Mezzanine finance and joint venture (JV) equity are the two ways to fill that gap, and they are the most expensive and most consequential layers of the whole structure. One is debt that costs yield; the other is equity that costs ownership. Choosing between them, and pricing each correctly, decides how much of the profit you keep and how much risk you carry.
This guide sets out where each layer sits in the capital stack, how far mezzanine stretches your leverage, how a JV profit share differs from a coupon, and the cost-versus-dilution-versus-control trade-off with a worked example. It then covers the deed of priority the senior lender will insist on, and how each layer is taxed. It is education, not a financial promotion: there is no rate table, no lender recommendation and no invitation to borrow. If you are weighing these structures, the tax treatment of the finance is part of the sum, and that is where we can help.
Where mezzanine and JV finance sit in the capital stack
Think of the money in a development as a stack, ordered by who gets repaid first if the scheme is wound up. At the bottom, first in the queue and cheapest, is senior debt: a first charge over the site, typically funding up to around 65% to 70% of total project cost and capped against a percentage of gross development value. At the top, last in the queue and most exposed, is the developer's own equity, which absorbs the first losses and earns the residual profit once everyone else is paid.
The gap between senior debt and the equity you can or want to commit is where mezzanine and JV finance live. Mezzanine slots in above the senior debt and below your equity as subordinated debt. JV equity sits alongside or in place of your own equity, at the top of the stack, sharing the same last-in-line risk you carry. That position in the queue is the single fact that explains everything else about how each is priced and taxed: the further up the stack, the greater the risk, the higher the required return, and the more the provider will want in exchange.
Because both layers are underwritten as part of the whole structure, neither can be settled in isolation. A lender or partner assesses the combined loan to cost, the loan to gross development value, your track record and the exit before agreeing where they will sit and what they will charge.
What mezzanine finance is and how far it stretches leverage
Mezzanine finance is subordinated, second-charge debt that tops up the senior facility. Where senior debt reaches around 65% to 70% of cost, mezzanine commonly stretches the combined borrowing to roughly 85% to 90% of total cost, and occasionally higher on a strong scheme run by an experienced developer. The practical effect is that it shrinks the cash you have to put in, so the same equity can support more schemes at once.
That leverage is not free. The mezzanine lender ranks behind the senior lender on the security and is repaid only after the senior debt is cleared, so its capital is the first meaningful money at risk after your own. To compensate for that subordination, the coupon sits well above the senior rate, and there is usually an arrangement fee, an exit fee, and sometimes a profit share or equity kicker on top. The number that matters is the all-in cost of the mezzanine slice, not the headline coupon, and it should be weighed against the marginal profit the extra leverage lets you earn. Pricing moves with the market and is deal-specific; the figures here are indicative ranges as at July 2026, and you should verify current terms with a lender or broker.
Some lenders package the senior and mezzanine layers into a single "stretch senior" facility from one house. That removes the intercreditor negotiation and can be faster, at a blended price. It is the same idea, delivered without a second lender at the table. Our guide to development finance covers how the senior facility itself is sized and drawn.
What JV finance is: equity for a profit share
Joint venture finance is not a loan. A JV partner funds the equity gap in return for a share of the profit, once the senior and any mezzanine debt is repaid. There is no coupon to service during the build and no capital to repay on a fixed date; the partner is paid out of the profit at the end, and shares the loss if there is one. In its cleanest form, one party brings the money and the other brings the scheme, the planning, the delivery and the sale.
Because the partner takes equity and carries the downside, they expect a meaningful slice of the upside and usually a say in the decisions that affect their money: the budget, material variations, the sales strategy, and often a veto over further borrowing or a sale below a floor price. The commercial terms live in a JV agreement or shareholders' agreement covering the profit split, decision rights, what happens on a cost overrun, and how and when each party exits. A JV can be run through a special purpose company, a partnership or an LLP, and that choice drives the tax, as the later section explains.
Mezzanine versus JV: cost, dilution and control
The choice between the two comes down to three levers: cost, dilution and control. Mezzanine costs yield (a coupon and fees) but keeps all the profit and all the control. A JV costs ownership (a share of the profit) but carries no debt-service coupon and shares the downside. A worked example makes the trade concrete.
Take a residential scheme with a total project cost of £2.5m and an expected profit of £500k on completion. Senior debt covers 65% of cost (£1.625m). You have committed 15% of cost as equity (£375k). That leaves a £500k gap, 20% of cost, and two ways to fill it.
| The £500k gap | Option A: Mezzanine (debt) | Option B: JV (equity) |
|---|---|---|
| What the provider gets | A coupon plus fees, then capital repaid | A share of the profit (say 50%) |
| Illustrative cost over an 18-month build | Coupon in a high double-digit annual range plus arrangement and exit fees, an all-in cost of the order of £130k on this slice | Half of the £500k profit, so £250k |
| Your share of the £500k profit | Roughly £370k (profit less the mezzanine cost) | £250k |
| Cash drain during the build | A coupon to service or roll up (adds to the debt) | None; the partner is paid at the end |
| Who carries the downside | You do; the mezzanine is repaid ahead of your equity even if profit falls | Shared; the partner's return falls with the profit |
| Control | Retained; the lender takes security and covenants, not a vote | Shared; the partner expects decision rights and vetoes |
On a scheme that performs to plan, mezzanine is the cheaper way to fill the gap: you pay roughly £130k for the leverage and keep about £370k of the profit, against giving away £250k to a JV partner. That is the case for debt. The case for equity is what happens when the scheme does not perform. If costs overrun or sales soften and the profit is thinner, the mezzanine still has to be repaid ahead of your equity, so the pain lands on you, whereas the JV partner's return falls with the profit and the loss is shared. Mezzanine is cheaper and keeps control; a JV is dearer on a good outcome but spreads the risk on a bad one. The figures above are illustrative ranges as at July 2026 and are not a quote; verify live pricing and terms with a lender or broker.
The deed of priority: why the senior lender must consent
You cannot bolt mezzanine onto a scheme without the senior lender's agreement, because the mezzanine ranks against the same security. When both are present, the senior lender takes a first charge and the mezzanine lender a second charge, and a deed of priority (or intercreditor agreement) records who is repaid first, how far the senior debt can grow, and what each lender can and cannot do if the borrower defaults. The senior lender priced its facility around being first in the queue, so it must consent to anything sitting behind it.
This is why mezzanine cannot be arranged in isolation from the senior facility, and why a combined stretch-senior facility from one lender can be simpler: there is no second lender to negotiate priority with. For a JV, the equivalent document is the JV or shareholders' agreement, which governs the relationship between the equity partners rather than the ranking of charges. Getting these documents right is a legal exercise, and the security and priority terms interact with the tax analysis of the payments that flow up the stack.
Want this checked against your specific situation?
Leave your details and a one-line summary. A specialist will reply within 24 hours, with no obligation. Look out for our text, a quick reply confirms your callback.
How mezzanine and JV finance are taxed
The tax treatment of the gap-funding layer is where the debt-versus-equity choice bites hardest, and it turns first on whether your activity is a development trade or an investment. That distinction decides the treatment of every finance cost, and property already sits on the wrong side of it for many people who assume they are investors. Our guides on the trading-versus-investment line for developers and whether you are a property investor or a developer set out the test in full; the summary below is deliberately short, because the detailed decision lives on those pages.
Mezzanine interest. For a genuine development trade, mezzanine interest is a cost of the trade. In a company it falls under the loan relationship rules in CTA 2009 and is relieved as it accrues, subject to anti-avoidance and, for larger groups, the corporate interest restriction. Interest is frequently capitalised into work in progress and relieved when the units are sold rather than expensed year by year. The Section 24 residential finance-cost restriction that limits an individual landlord to a 20% basic-rate tax reducer does not touch a build-to-sell trade, because that restriction applies to a residential property rental business, not to a development trade.
JV profit share. Equity is taxed by its structure, not its label. A profit share paid as a distribution from a JV company is a dividend in the recipient's hands and is not a deductible cost to the company, which is the opposite of interest. A profit share routed through a partnership or LLP is taxed as each member's share of the trading profit. A preferred return dressed up to look like a coupon may be recharacterised depending on the terms. Because the wrong structure can turn what you assumed was a deductible cost into a non-deductible distribution, and because a profit-linked mezzanine kicker can blur the debt-equity line, the structure should be modelled for tax before the agreement is signed. Our guide to the tax treatment of financing a development works through interest, capitalisation and the profit-share point in detail.
Scope and the regulated boundary
Mezzanine and JV finance for a genuine property development are business-purpose arrangements. They sit outside the regulated-mortgage and consumer-credit perimeters, so the activity is unregulated, and this page describes how the products work rather than offering or arranging any of them. That distinction matters, because the financial promotion of qualifying credit is restricted under FSMA 2000 section 21, and nothing here is an invitation or inducement to borrow.
Two situations fall outside this guide entirely. First, any borrowing secured on your own home is a regulated mortgage contract, whatever it funds, and you should speak to an FCA-authorised mortgage adviser rather than treat it as development finance. Second, this is not tax, legal or financial advice on your specific scheme; the numbers are illustrative ranges, and pricing, leverage and the tax analysis all depend on the facts. Verify current finance terms with a lender or broker, and take advice on the structure before you commit.
Where a property tax review fits
The finance structure and the tax structure are the same decision viewed from two angles. Whether the gap is filled with mezzanine debt or JV equity changes not only the headline cost but whether the payment up the stack is a deductible finance cost or a non-deductible distribution, whether interest is capitalised into work in progress, and how the profit split is charged in each partner's hands. Those choices are far cheaper to get right before the agreements are signed than to unpick afterwards.
If you are structuring a scheme with a mezzanine or JV layer, we can model the after-tax position of each option against your live numbers, confirm your trading-versus-investment status, and set out how the interest or profit share is relieved or charged. Before you finalise the funding, it is worth checking the exit too: our guide to development exit finance covers refinancing the scheme at completion, and you can size a facility with the development finance calculator. To discuss the tax treatment of your capital stack, ask for a property tax structuring review below.
Sources
- legislation.gov.uk: Financial Services and Markets Act 2000 s.21 (restriction on financial promotion)
- FCA Handbook: PERG 8 (financial promotion and s.21)
- legislation.gov.uk: Corporation Tax Act 2009 Part 5 (loan relationships)
- HMRC: Business Income Manual BIM45650 (interest and incidental costs of loan finance)
- Bridging & Development Lenders Association: BDLA (market standards and product definitions)
- RICS: RICS Valuation (Red Book) standards