Alex is Sprintlaw's co-founder and principal lawyer. Alex previously worked at a top-tier firm as a lawyer specialising in technology and media contracts, and founded a digital agency which he sold in 2015.
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If you’re raising investment for your UK startup or growing SME, you’ll probably come across private equity loan notes sooner than you expect.
They can look (and sound) like a straightforward way to get capital into the business without immediately issuing new shares. But loan notes sit right at the crossroads of debt and equity - so the detail matters.
This guide breaks down what private equity loan notes are, why they’re used, and the key legal and commercial terms you should understand before you sign anything. We’ll also flag common pitfalls and the documents you’ll typically need to get this right from day one.
Note: This article is general information only, not legal, financial or tax advice. Loan notes can have significant tax and commercial consequences, so you should get advice on your specific structure before proceeding.
What Are Private Equity Loan Notes (In Plain English)?
Private equity loan notes are a type of debt instrument where an investor lends money to your company on agreed terms, documented in a loan note instrument (sometimes called a “loan note agreement” or “note instrument”).
At a high level, your company receives funds now, and then:
- repays the loan later (usually with interest), or
- converts the loan into shares in certain circumstances (if they’re convertible), or
- repays it at an “exit” event (like a sale of the business) with a pre-agreed return profile.
They’re common in private equity-backed deals, management buyouts (MBOs), growth investments, and some acquisition structures.
Why They’re Called “Loan Notes”
They’re “loan” because the money is advanced as debt. They’re “notes” because the obligation is typically set out in a formal note instrument that can (depending on drafting) be transferable and enforceable like a financial instrument.
Are Loan Notes The Same As Convertible Notes?
Not always.
A convertible note is a type of loan note that can convert into equity (shares), typically on a funding round or another trigger event. But not all private equity loan notes are convertible - many are structured as repayment-only instruments with specific protections and repayment mechanics.
If you’re looking at a note that converts into shares, the term “convertible note” is often used in venture-style deals. If you’re looking at a note used in acquisition or PE structuring, it may be a non-convertible loan note with repayment linked to an exit or timetable.
It’s worth sanity-checking the structure early, because the legal documents and negotiation points can change significantly. For example, a funding package might include a Convertible Note alongside (or instead of) immediate equity.
Why Do Founders And SMEs Use Private Equity Loan Notes?
From a founder or owner-manager perspective, private equity loan notes can be attractive because they can offer speed and flexibility. But the real reason they’re used is often about risk allocation and control - who bears what risk, and who controls what decisions, at what point in time.
Here are some of the common commercial drivers.
1) They Can Delay A Valuation (Or Avoid One Entirely)
Agreeing a valuation can be one of the biggest sticking points in any investment discussion. A loan note can sometimes get cash into the business without forcing an immediate, final valuation.
This is more common in convertible structures (often used where the next round will set price), but you can also see “deferred equity” mechanics in some private equity arrangements.
2) They Can Be Faster Than A Full Equity Round
Equity rounds can involve extensive negotiation over:
- share rights and classes
- board appointments
- reserved matters / investor vetoes
- warranties and disclosure
Loan notes can be simpler - but don’t assume they are. Many private equity loan note instruments include detailed protections (and sometimes security) that can be just as technical as a share subscription.
3) They Can Help Structure An Acquisition Or Exit
In some deals, loan notes are used as part of the consideration when a company (or shares) are being bought. For example, instead of paying all cash up front, the buyer might issue loan notes to the seller as part of the price, payable later (sometimes with interest, sometimes linked to performance or time).
This can be commercially useful, but it also means you’re locking in obligations that can affect future fundraising, cashflow, and saleability.
4) They Can Change The Investor’s “Downside Protection”
Debt generally ranks ahead of equity if something goes wrong. So an investor may like loan notes because they provide a clearer repayment obligation than shares do.
That can mean your investor is taking less risk than a pure equity investor - which may influence the price of capital (e.g. interest rate, redemption premium, fees, or conversion terms).
Key Terms In Private Equity Loan Notes (And Why They Matter)
Private equity loan notes can look deceptively short at first glance (“Company borrows £X, repays on Y date, interest Z%”). But the real commercial impact often sits in the detail.
Here are the terms we typically see founders and SMEs need to understand before signing.
Principal, Interest And “Payment-In-Kind” (PIK) Interest
- Principal: the amount borrowed.
- Interest rate: can be fixed or variable.
- PIK interest: instead of paying interest in cash, it accrues and is added to the principal (so you repay more later).
PIK interest can help with short-term cashflow, but it can also materially increase what you owe at exit. Make sure you model the numbers over time, not just at day one.
Maturity Date And Repayment Mechanics
Loan notes often have a maturity date (the date repayment is due). But there may also be:
- mandatory early repayment triggers (e.g. on sale, refinancing, or a breach)
- optional early repayment (sometimes with penalties)
- repayment waterfalls (who gets paid first and from what funds)
Founders often focus on the maturity date and miss the “early trigger” events that could force repayment at an awkward time.
Conversion Rights (If Convertible)
If the loan notes are convertible, you’ll usually see terms like:
- conversion event (e.g. next qualifying funding round, exit, or maturity)
- conversion price (how many shares they get per £1 of debt)
- discount (investor gets shares at a discount to the next round price)
- valuation cap (a maximum valuation for conversion purposes)
These points are heavily negotiated because they directly affect dilution and control when the debt turns into shares.
It’s also important to check whether conversion is optional (investor chooses) or automatic (triggered by event). Optional conversion can leave uncertainty in your cap table planning.
Security, Guarantees And Priority
Some private equity loan notes are unsecured. Others are secured against company assets (or even supported by personal guarantees in smaller deals - which can be a serious risk for founders).
If notes are secured, you’ll want to understand:
- what assets are charged (all assets vs specific assets)
- ranking (first charge, second charge, behind a bank, etc.)
- what happens on default (and how quickly enforcement can happen)
Security and ranking are not just technicalities - they can limit your ability to take bank finance later, and they can affect how attractive your company looks to future investors or buyers.
Investor Controls And “Covenants”
Loan notes can come with ongoing promises from the company, commonly known as covenants. These might restrict your ability to:
- take on new debt
- sell key assets
- pay dividends
- make acquisitions
- change the nature of the business
In practice, these can feel similar to investor veto rights in a shareholders’ agreement - just packaged in a debt instrument instead.
If the investment is part debt and part equity, you’ll often see these controls split across documents, including a Shareholders Agreement where decision-making and governance are clearly set out.
Events Of Default
Most loan note instruments define “events of default” - things that, if they occur, allow the investor to accelerate repayment (i.e. demand the money back immediately), enforce security, or apply default interest.
Common examples include:
- missed payments
- insolvency-related events
- breach of key obligations
- misrepresentations
- failure to provide financial information
It’s not unusual for default provisions to be broader than you expect, so it’s worth reviewing them with a lawyer before you commit.
What Legal Documents Are Usually Needed For A Loan Note Investment?
The right documents depend on the exact deal - whether it’s pure debt, convertible debt, debt plus equity, or notes issued as consideration on an acquisition.
That said, founders and SMEs will usually see some combination of the following.
Loan Note Instrument / Loan Note Agreement
This is the core document setting out the note terms: repayment, interest, maturity, conversion rights (if applicable), and investor protections.
Because these documents can have long-term consequences, it’s rarely a good idea to rely on a generic template. Even small wording changes can affect enforceability, repayment triggers, or dilution outcomes.
Term Sheet (Upfront Commercial Summary)
Many deals start with a term sheet. While term sheets are often “non-binding” (except for certain clauses like confidentiality or exclusivity), they set expectations and make later negotiation smoother.
It’s also where founders can catch issues early - before lawyers turn them into hard obligations. If you’re at this stage, having a Term Sheet that clearly reflects what you actually agreed in principle can save time, cost, and headaches later.
Equity Documents (If There’s A Conversion Or Equity Component)
If the notes convert into shares, or if the investor is also subscribing for shares at completion, you may need:
- a Share Subscription Agreement (for issuing shares)
- updated articles of association and governance arrangements
- a shareholders’ agreement (to govern decision-making and exits)
Even if conversion happens later, you should think ahead about how the company will operate once an investor becomes a shareholder. Otherwise, you risk a scramble later - exactly when you need to focus on growth.
Company Approvals And Director Decisions
Issuing loan notes and taking on debt is usually not something you want to do informally. Depending on your constitution and the transaction, you may need:
- board approvals (directors’ resolutions)
- possibly shareholder approvals
- updates to statutory registers and any Companies House filings required for the structure (for example, if security is being registered)
Getting the company’s “paper trail” right is part of protecting you as a founder. Sloppy approvals can create disputes later (especially if the business is sold or refinanced).
Deeds (Where Extra Formality Is Needed)
Some documents in funding and investment structures are executed as deeds (for example, certain guarantees or variations). If you’re signing something “as a deed”, you need to follow specific execution rules, otherwise enforceability can become an issue.
This is one area where it’s worth being careful about process, not just substance, and understanding executing deeds correctly.
Common Risks And Pitfalls For Founders (And How To Avoid Them)
Private equity loan notes can be a smart funding tool. But we often see founders run into issues because they treat the notes as “just debt” and underestimate how much leverage and control can sit inside the terms.
Here are some practical pitfalls to watch out for.
Underestimating The Cashflow Impact
Even if repayment is due at exit or maturity, interest can accrue faster than you expect - especially if it’s PIK interest or if default interest applies after a technical breach.
Tip: build a simple model that shows worst-case repayment amounts at 12, 24, and 36 months, including fees, interest, and any redemption premium.
Signing Notes That Block Future Fundraising
Some loan notes restrict you from raising new funding, granting security, or changing the capital structure without consent.
That can make later fundraising harder (or more expensive), because new investors often want clean priority and clear rights.
Tip: if you’re expecting to raise again, negotiate flexibility now - or at least a clear consent process with realistic timelines.
Not Aligning The Notes With Your Exit Plan
If you’re building towards a sale of the business, the way loan notes are repaid on exit can significantly affect what you (and other shareholders) walk away with.
It’s also common for exit terms to interact with other documents, such as a Share Sale Agreement if your shareholders sell their shares, or deal warranties and indemnities that can create post-sale liabilities.
Tip: think about “exit math” early: what gets paid first, what gets deducted, and what liabilities survive completion.
Assuming “Standard Terms” Means “Safe Terms”
In private equity, investors might call terms “standard” because they’ve used them before. That doesn’t mean the terms are standard for your business, cashflow, risk appetite, or growth plan.
Tip: focus on how each clause affects your ability to run the business day-to-day, not just whether it looks “market”.
DIY-ing The Documentation
Because loan notes are a financing instrument, they usually need careful drafting to avoid ambiguity (especially around triggers, conversion, and default).
If things go wrong later, unclear drafting can mean:
- disputes about whether repayment has been triggered
- unexpected dilution if conversion mechanics are unclear
- difficulty attracting new investors due to messy legacy terms
It’s one of those areas where getting advice early is often cheaper than fixing the problem later.
Key Takeaways
- Private equity loan notes are a common way for UK founders and SMEs to receive investment as debt, sometimes with conversion into shares or exit-linked repayment mechanics.
- Loan notes can be commercially attractive, but the key terms (interest, maturity, conversion rights, security, covenants and defaults) can materially affect your control, dilution and future fundraising options.
- Not all loan notes are the same - some are simple repayment instruments, while others operate like delayed equity through conversion features.
- Documentation matters: you’ll typically need a properly drafted loan note instrument, and often supporting documents such as a term sheet and (where relevant) equity documents like a shareholders’ agreement.
- Founders should be especially careful about repayment triggers, default clauses, and any restrictions that could block later funding rounds or make an exit more complicated.
If you’d like help reviewing or drafting private equity loan notes (or the wider investment documents around them), you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.
