What Is Senior Debt? Priority, Security and Loan Terms

If you’re raising finance for your startup or SME, you’ll quickly run into funding jargon that sounds intimidating (and expensive).

One of the most common terms you’ll hear from lenders, investors and advisers is senior debt.

Understanding what senior debt is isn’t just a “nice to know” detail. It can affect:

• who gets paid first if things go wrong,
• what assets you might have to put on the line, and
• how much flexibility you’ll have to take on new funding later.

Below, we break senior debt down in plain English, explain how it works in the UK, and walk through the key legal and commercial terms you should look out for before you sign.

What Is Senior Debt?

Senior debt is a loan or credit facility that ranks ahead of more “junior” capital (like subordinated debt) for repayment if a company becomes insolvent or is wound up.

In practical terms, “senior” usually means:

• priority (it’s generally paid before subordinated lenders and shareholders, and may rank ahead of other liabilities depending on the structure), and
• lower risk for the lender (because the lender has stronger repayment rights, and the debt is often secured).

That lower risk for the lender often translates to a lower interest rate compared with more junior forms of funding (like mezzanine debt) or equity investment. The trade-off is that senior lenders commonly ask for tighter controls through security and financial covenants.

Senior Debt In One Sentence

If you’re asking “what is senior debt?”, the simplest explanation is: it’s borrowing that’s intended to be repaid first (or earlier than other lenders), often backed by security over the company’s assets.

Is Senior Debt The Same As A Secured Loan?

Not always, but they often overlap.

Senior debt is about priority/ranking. Security is about rights over assets. Many senior facilities are secured (for example, through a debenture creating fixed and floating charges), but you can have:

• senior secured debt (most common),
• senior unsecured debt (less common for SMEs), and
• secured debt that isn’t truly “senior” if there’s an agreed ranking arrangement placing it behind another lender.

Why Does “Seniority” Matter? Priority In Insolvency And Restructuring

Seniority matters because it shapes the order in which money is paid out when a company can’t pay its debts and enters an insolvency process (like administration or liquidation), or when it has to restructure its obligations.

In the UK, “who gets paid first” can be technical and fact-specific. It can depend on (among other things) the type of security granted (fixed vs floating), when and how charges were created and registered, the costs of the insolvency process, and which statutory priorities apply. As a broad starting point:

• fixed charge holders are often paid from the proceeds of the assets subject to their fixed charge (after certain costs),
• preferential creditors (including certain employee-related claims) can be paid ahead of floating charge holders in relevant circumstances,
• floating charge holders may be paid from floating charge realisations, typically after preferential claims and subject to the prescribed part set aside for unsecured creditors, and
• unsecured creditors generally share in any remaining assets available to them (often receiving only a portion, if anything).

This is why senior lenders care so much about:

• their security (what assets they can rely on), and
• their ranking (whether anyone else can jump the queue, and on what assets).

A Startup-Friendly Example

Let’s say your business borrows from a bank under a senior facility and grants security over business assets. Later, you raise additional finance from another lender or issue convertible notes.

If the company runs into trouble, the senior lender will typically expect to be repaid first from the secured assets (to the extent their security and ranking allow). That can leave less (or nothing) for other lenders and shareholders.

This doesn’t mean senior debt is “bad” - it just means you need to understand how it changes the risk profile for everyone involved.

How Senior Debt Is Structured In The UK (Security, Guarantees And Documentation)

Senior debt can be provided in several ways, including:

• term loans (a lump sum repayable over time),
• revolving credit facilities (draw down and repay within a limit),
• invoice finance or asset-based lending (linked to receivables or equipment), and
• venture debt (often used by startups with recurring revenue, sometimes paired with warrants).

What makes it “senior” is usually the ranking and (often) the security package.

Security: Fixed Charges, Floating Charges And Debentures

Senior lenders frequently take security over company assets. In the UK, this can include:

• fixed charges (often over specific assets like property, plant/equipment, or certain bank accounts), and
• floating charges (often over circulating assets like stock and general business assets that change over time).

For companies, these are commonly documented in a debenture (or a suite of security documents). Security interests may also need to be registered at Companies House to be enforceable against third parties and to preserve priority.

If your lender wants broad “all assets” security, it’s especially important to understand how that might affect your future ability to raise finance or sell assets.

Personal Guarantees (And Why You Should Pause Before Agreeing)

Some senior lending to small businesses involves personal guarantees from directors or founders.

A personal guarantee can be a big deal because it can make you personally liable if the company can’t repay. That changes the risk from “business risk” to “personal financial risk”.

If a guarantee is on the table, it’s worth getting advice on:

• caps and limits (is it unlimited or capped?),
• time limits (does it end after certain repayments?), and
• release events (for example, after refinancing or reaching a milestone).

Core Documents You’ll See

Depending on the deal, senior debt might involve:

• a loan agreement or facility agreement,
• security documents (like a debenture),
• board minutes and shareholder approvals (where required), and
• sometimes side documents (for example, ranking arrangements if other lenders or investors are involved).

If you’re raising equity alongside borrowing, it’s also worth checking how your funding terms interact with your Shareholders Agreement, particularly around consent rights, reserved matters and restrictions on taking on additional debt.

Key Senior Debt Terms To Negotiate (Interest, Covenants, Events Of Default And Control)

Senior debt is often marketed as “cheaper capital” than equity. That can be true on interest rate alone - but the control terms can be just as important as the price.

Here are the clauses you’ll want to understand before signing.

1. Interest, Fees And The True Cost Of Capital

Interest may be fixed, variable or linked to a reference rate. But don’t stop at the headline rate.

Also check for:

• arrangement fees and commitment fees,
• default interest (often significantly higher),
• early repayment fees (break costs), and
• legal and due diligence costs payable by you.

2. Repayment Profile And Cashflow Pressure

Senior term loans can have amortisation (regular repayments), bullet repayment at maturity, or a mix.

Make sure the repayment schedule matches your reality. For example, if your revenue is seasonal or you’re still scaling, aggressive amortisation can become a problem quickly.

3. Financial Covenants And Reporting Requirements

Many senior facilities include financial covenants, such as:

• minimum liquidity (cash) requirements,
• minimum EBITDA targets (for more established businesses),
• leverage ratios (debt to earnings), or
• limitations on capital expenditure.

Even where covenants are “light”, reporting obligations may still be strict (monthly management accounts, budgets, forecasts and bank statements).

4. Events Of Default (And What Happens Next)

An event of default is a trigger that lets the lender take enforcement steps (for example, demanding repayment immediately, stopping further drawdowns, or enforcing security).

Common events of default include:

• non-payment,
• breach of covenants,
• insolvency-related events,
• material adverse change clauses (these can be broad),
• cross-default (defaulting under another agreement triggers default here too), and
• breach of information undertakings.

This is where carefully drafted contracts really matter. A facility might look “standard”, but small drafting choices can dramatically change your risk.

5. Restrictions On Your Business (Negative Pledges And Consent Rights)

Senior lenders often want to stop you from doing things that could weaken their position, such as:

• granting security to someone else (negative pledge),
• taking on more debt without consent,
• selling key assets,
• paying dividends, or
• making major acquisitions.

If you’re planning to raise equity soon, or you’re operating a fast-moving startup, these restrictions can slow you down. That doesn’t mean you shouldn’t take senior debt - it just means you should align it with your growth plans.

Senior Debt Vs Other Funding Options (And What It Means For Founders)

When you’re deciding how to fund growth, you’re usually balancing three things:

• cost (interest or dilution),
• risk (security/guarantees and default risk), and
• control (covenants and governance rights).

Here’s how senior debt generally compares with other options.

Senior Debt Vs Equity

Equity means selling shares in your company. You don’t repay equity like a loan, but you do give up a portion of ownership and potentially decision-making control.

Senior debt usually:

• doesn’t dilute ownership,
• is repayable (so it’s a cashflow commitment), and
• can come with restrictions that affect how you run the business day-to-day.

If you’re taking investment, you’ll likely need well-aligned governance documents (and clear founder protections). That’s where a tailored Founders Agreement can help clarify roles, equity splits, and decision-making early on, before additional stakeholders come into the picture.

Senior Debt Vs Mezzanine Or Subordinated Debt

Mezzanine or subordinated debt typically ranks behind senior debt. Because it’s riskier for the lender, it often has:

• higher interest rates,
• fees or equity kickers (like warrants), and/or
• more flexible repayment structures.

Some growth-stage businesses use a mix: senior debt for the “base” facility, with mezzanine layered behind it. If you go down this route, you’ll want to be very clear on intercreditor and ranking arrangements.

Senior Debt And “Priority” From A Founder’s Perspective

Founders sometimes focus only on getting funding secured and forget to ask: what happens if the business needs to pivot, refinance, or raise further capital?

Because senior debt usually sits at the top of the repayment waterfall, it can:

• reduce flexibility for future borrowing,
• create consent rights that slow down strategic decisions, and
• affect investor appetite if the company is already heavily secured.

The best approach is to treat debt terms as part of your wider legal foundations, not a standalone “finance doc”.

How Do You Protect Your Business When Taking On Senior Debt?

Debt can be a smart tool - but only if it fits your business model and you understand what you’re agreeing to.

Here are practical steps to protect your startup or SME when negotiating senior debt.

Get Clear On Who Is Borrowing (And Who Is On The Hook)

Confirm:

• is the borrower your limited company, a group company, or multiple entities?
• are any directors giving personal guarantees?
• are there indemnities or “joint and several” obligations?

Even if the lender presents documents as “non-negotiable”, there are often points you can clarify or narrow.

Check Your Authority To Sign And Approvals

For companies, make sure you have the proper approvals in place (board resolutions, shareholder approvals if required, and compliance with your constitution).

If you’re unsure what documents are needed for decision-making and governance, it can help to check your Company Constitution (articles of association) so you don’t accidentally sign something without authority.

Map The Security Against Your Actual Assets

Ask for a clear summary of:

• what assets are being charged (and whether any are excluded),
• whether bank accounts are controlled,
• whether IP is included (trade marks, code, brand assets), and
• whether any third-party consents are needed (for example, landlord consents under leases).

If your value is heavily tied to IP (common for startups), be careful about granting broad security without understanding how it impacts licensing, assignments, or future investment.

Make Sure Your Commercial Contracts Don’t Conflict With The Loan

Senior debt terms can interact with your day-to-day contracts in ways you might not expect.

For example:

• If you have a key supplier contract, does the loan restrict changing suppliers or making large prepayments?
• If you have major customer contracts, do you need lender consent to assign or amend them?
• If you’re hiring fast, can you still commit to salaries and benefits without breaching covenants?

Having clean, consistent agreements across the business helps avoid accidental breaches. This includes having fit-for-purpose contracts with customers and suppliers, and also the right internal documents like an Employment Contract when you’re bringing team members on board.

Plan For The “Next Raise” Early

It’s common to take senior debt now and plan to raise equity later. The issue is that the lender’s consent rights can affect the timeline and terms of that raise.

Before you sign, think ahead:

• Will you need permission to issue new shares?
• Will you need to repay the debt on a change of control?
• Are there restrictions on granting investor security (even if an investor asks for it)?

A quick legal review early can save weeks of delays later when you’re trying to close a funding round.

Key Takeaways

• Senior debt is borrowing that generally ranks ahead of subordinated lenders and shareholders for repayment if your company becomes insolvent, which is why lenders often treat it as lower risk.
• When founders ask what senior debt is, the real issue is usually priority (who gets paid first) and security (what assets the lender can enforce against).
• Senior debt commonly comes with security documents, covenants, reporting obligations, and restrictions on taking on more debt or selling assets.
• The “price” of senior debt isn’t just the interest rate - fees, default clauses, and consent rights can materially affect your cashflow and flexibility.
• If you’re raising equity now or later, senior debt terms should be aligned with your governance documents, including your Shareholders Agreement and company constitution.
• Don’t rely on generic templates for funding documents - small drafting details in events of default, security clauses, and guarantees can create big risks.

If you’d like help reviewing or negotiating senior debt terms (or making sure your wider legal foundations are set up properly), you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.