Personal Guarantees on Company Mortgages
Behind almost every limited company mortgage sits a personal guarantee. It is the reason lenders are willing to lend to a company at all, and understanding exactly what you are signing is one of the most important things a director does.
A personal guarantee is a director's personal promise to repay the company's mortgage debt if the company cannot. Because a limited company can be wound up, lenders bridge that gap by taking a guarantee, giving them recourse to the director beyond the property itself. It is standard and effectively unavoidable on limited company buy to let lending. A guarantee is not the same as being named on the mortgage: it usually only bites if the company defaults and the sale of the property does not clear the debt. Guarantees are often capped, commonly at 20% to the full loan amount depending on the lender.
At a glance
- What it isA director's personal promise to cover the company's mortgage debt
- Why lenders take itA company can be wound up; the guarantee gives recourse to a person
- Is it avoidable?Effectively no on company buy to let lending
- When it bitesIf the company defaults and the property sale falls short
- Typical capOften 20% of the loan, sometimes the full amount, varies by lender
- Multiple directorsUsually joint and several liability, so each can be pursued in full
What a personal guarantee actually is
A limited company gives its owners limited liability: if the company fails, the directors are not normally personally liable for its debts. That protection is exactly what makes a lender nervous about lending to a company. If the company defaults, the lender's only security would be the property itself, with no person standing behind the debt.
A personal guarantee closes that gap. Each director signs a separate legal promise that, if the company cannot meet the mortgage, they will personally. It sits alongside the mortgage rather than inside it, and it is what makes limited company buy to let lending possible on sensible terms.
This is a core part of the limited company property finance picture. It comes up the moment you ask can a limited company get a mortgage, because the guarantee is the answer to why lenders will.
How much does a guarantee cover?
This is the question that matters most, and the answer varies by lender. Some cap the guarantee at a percentage of the loan, commonly around 20%, on the basis that the property itself covers the rest. Others require a guarantee for the full loan amount. A few add a margin on top to cover costs and interest on a default.
| Guarantee structure | What you are exposed to |
|---|---|
| Capped at 20% of loan | Your personal liability is limited to a fifth of the borrowing |
| Full loan amount | You can be pursued for the whole outstanding debt if the sale falls short |
| Loan plus costs margin | The debt plus enforcement costs and default interest |
| Joint and several | Each director can be pursued for the full amount, not just their share |
The cap is one of the things worth shopping on, not just the rate. Two lenders offering similar rates can carry very different guarantee terms, and for a director that difference is real personal risk. We factor guarantee terms into which lender we recommend, not just the headline pricing.
When a guarantee is called, and when it is not
A guarantee is not a bill you pay while things are going well. It only comes into play if the company defaults on the mortgage and the lender enforces its security. Even then, the lender first looks to the property: it takes possession, sells it, and applies the proceeds to the debt. The guarantee only bites on any shortfall left after that sale.
In practice, for a sensibly geared buy to let where the property holds its value, a shortfall is unlikely and the guarantee is never called. The risk is real but tail end: it matters most where borrowing is high relative to value, or where a forced sale in a weak market leaves a gap.
Where a company has two or more directors, guarantees are usually joint and several. That means the lender can pursue any one director for the full shortfall, not just their share, and leave the directors to sort it out between themselves. If you are guaranteeing alongside a business partner, understand this before you sign.
How to limit your exposure
You cannot usually avoid a guarantee on company buy to let, but you can manage it. The levers are the lender's cap, the loan to value, and independent advice. A lower loan to value leaves more equity in the property, which makes a shortfall, and therefore a call on the guarantee, far less likely.
- Compare guarantee terms across lenders, not just rates, and favour a capped guarantee where possible.
- Keep the loan to value sensible so the property comfortably covers the debt on a sale.
- Take independent legal advice on the guarantee wording before signing; some lenders require it.
- Consider personal guarantee insurance, which can cover part of the liability if it is ever called.
- Understand whether the guarantee is joint and several with any co directors.
We weigh guarantee terms into every recommendation. See lender appetite on the limited company buy to let mortgages page, size the borrowing in the limited company mortgage calculator, and if you are still choosing a structure, read SPV vs trading company.
This guide explains how guarantees generally work, not the terms of any specific one. A personal guarantee is a binding legal commitment, and the wording differs between lenders. Take independent legal advice on the actual document before you sign, and let us help you compare the guarantee terms on offer.
- Personal guarantee
- A director's binding personal promise to repay the company's mortgage debt if the company defaults, giving the lender recourse beyond the property.
- Joint and several liability
- Where several guarantors each can be pursued for the full debt, not just their share, so a lender may recover everything from one director.
- Shortfall
- The debt remaining after a lender sells the property, which is the amount a personal guarantee typically covers.
- Personal guarantee insurance
- Cover a director can buy that pays part of a guarantee liability if it is ever called upon.
Personal Guarantees on Company Mortgages: common questions
Does a personal guarantee affect a mortgage?
Yes. A personal guarantee is a liability that other lenders can take into account, so guaranteeing a company mortgage can affect your capacity to borrow personally elsewhere. It does not usually appear as a debt on your personal credit file while the company pays, but it is a commitment you should disclose when applying for other borrowing, as it represents a contingent liability.
What is a personal guarantee for a limited company?
It is a personal promise by a director to repay the company's borrowing if the company cannot. Because a limited company shields its directors from its debts, lenders take a guarantee to restore recourse to a real person. On a company buy to let mortgage the guarantee typically covers any shortfall after the property is sold, and it is a standard, effectively unavoidable requirement.
Is it difficult to get a mortgage on a limited company?
Not with the right lender. Limited company buy to let is a well established specialist market, and a clean SPV with the correct SIC codes and a director willing to give a personal guarantee is lent to routinely. The guarantee is precisely what makes lenders comfortable. The panel is narrower than personal buy to let and rates are higher, but approval is straightforward for a properly structured case.
Can a director give a personal guarantee?
Yes, and on a company buy to let mortgage they almost always must. Each director typically signs a guarantee, and where there are several directors it is usually joint and several, meaning any one of them can be pursued for the full shortfall. A director should take independent legal advice on the wording, and check the cap, before signing.
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