Every year, the Bank of Mum and Dad lends or gifts billions of pounds to help the next generation onto the property ladder or through a financial rough patch. Yet for every family loan that works out smoothly, another quietly corrodes trust, creates legal exposure, or blows apart at the seams during a divorce, a death, or a simple disagreement about what was actually agreed. The uncomfortable truth is this: if you lend money to your child without a proper written agreement, English law may treat the transfer as a gift — and you may never see a penny back, regardless of what was “understood” around the kitchen table.
Why Verbal Promises Are Worth Nothing
Family loans occupy an awkward legal space. Courts recognise that parents routinely give money to their children with no expectation of repayment. So when a dispute arises and there is no written agreement, a judge must decide: was this a loan or a gift? The burden of proof falls on the parent claiming it was a loan, and without documentation, the evidence is often just one person’s word against another’s — sometimes complicated by grief, divorce proceedings, or insolvency. In Arif v Anwar [2015], the Court of Appeal emphasised that the quality and contemporaneity of documentary evidence is decisive in resolving these disputes. A WhatsApp message sent three years after the transfer saying “when are you paying me back?” is weak evidence compared with a formal agreement signed at the time the money changed hands.
What a Family Loan Agreement Must Cover
A robust family loan agreement is not a template you download and sign in five minutes. It needs to be tailored to your circumstances, ideally prepared or reviewed by a solicitor, and executed as a deed rather than a simple contract. Why? Because a deed carries a 12-year limitation period for enforcement, compared with just 6 years for a standard contract. That difference matters enormously when repayment is deferred or stretched over a long period.
At a minimum, the agreement should address:
- Loan amount and purpose — specifying whether the funds are for a property deposit, renovation, or general use.
- Interest rate — even a nominal rate (or an explicit statement of 0%) removes ambiguity and has tax implications.
- Repayment schedule — fixed monthly amounts, lump sum on sale of a property, or repayment on demand.
- Security — whether you will register a legal charge (second charge) over the property, giving you priority over unsecured creditors.
- Default provisions — what happens if payments are missed, including acceleration clauses.
- Death of either party — does the loan survive into the borrower’s estate, and what happens if the lender dies before repayment?
- Relationship breakdown — an express term confirming the loan is not a gift protects your position in your child’s divorce or dissolution proceedings.
The Mortgage Lender Angle Most People Miss
If your child is using your money as part of a property purchase, their mortgage lender will almost certainly ask where the deposit came from. Most mainstream lenders require a gifted deposit letter — a signed declaration that the money is a gift with no expectation of repayment. If you sign that letter but simultaneously hold a private loan agreement expecting repayment, you have a serious problem. You are effectively making a false declaration to the lender, which could constitute fraud. The lender relied on your statement when assessing affordability, and discovering a hidden obligation could trigger a mortgage recall.
The honest route is harder but legally sound: declare the arrangement as a loan upfront. Some lenders will accept this, particularly if the loan is from a family member, though it will be factored into the borrower’s affordability assessment. Others will refuse. Either way, transparency is non-negotiable.
Tax Consequences You Cannot Afford to Ignore
Income Tax on Interest
If you charge interest on the loan, that interest is taxable income for you. You must declare it on your Self Assessment return, even if the borrower is your child. HMRC does not carve out a family exemption.
Inheritance Tax
An outstanding loan is an asset in your estate. If you die before the loan is repaid, its value forms part of your estate for IHT purposes. Conversely, if you forgive the debt during your lifetime, the forgiveness is a potentially exempt transfer (PET). If you die within seven years of forgiving it, IHT may be payable on the forgiven amount.
Capital Gains Tax
The loan itself does not trigger CGT, but if you lend money to help purchase a property and later acquire a beneficial interest in that property (intentionally or inadvertently through poor drafting), a disposal could create a CGT liability. Keep loan agreements and property ownership entirely separate unless you have taken specific advice.
SDLT Surcharge
This catches families off guard. If a parent takes a legal interest in the child’s property as security — or worse, is named on the title — and the parent already owns their own home, the 3% SDLT higher rate for additional dwellings applies to the entire purchase price. Even if the parent’s involvement is purely to facilitate the loan, HMRC does not care about intent. Structure matters.
When Your Child Has a Partner
This is where family loans most frequently implode. Your child’s partner may have no legal obligation under the loan agreement unless they are a named party. If the relationship breaks down, a family court has wide discretion to divide matrimonial assets — and a judge may treat your “loan” as a soft debt or even a gift if the agreement is informal. The leading case of Parfitt v Lawless [2016] and similar authorities confirm that family courts scrutinise intrafamily loans with considerable scepticism.
Practical steps to protect your position:
- Ensure your child’s partner acknowledges the loan in writing, ideally as a co-signatory or through a separate acknowledgement of debt.
- If your child and their partner are buying together, insist on a Declaration of Trust that explicitly records your loan as a liability of the property, to be repaid from sale proceeds before any equity split.
- Consider registering a restriction on the title at HM Land Registry, preventing a sale or remortgage without your consent.
Securing the Loan Against Property
Taking a second legal charge over the property is the gold standard of protection. It means that if the property is sold — voluntarily or through repossession — your debt is repaid after the first-charge mortgage lender but ahead of unsecured creditors. Crucially, most first-charge lenders must consent to a second charge being registered, so this needs to be arranged during the conveyancing process, not as an afterthought.
A registered charge also protects you if your child is made bankrupt. Without it, you are an unsecured creditor standing at the back of a very long queue, likely recovering pennies in the pound.
The Emotional Dimension Is Real — But Not a Substitute for Paperwork
Parents frequently resist formalising loans because it “feels wrong” to treat their child like a commercial borrower. This instinct is understandable but misguided. A clear agreement protects the relationship far more effectively than a vague promise. It eliminates the festering resentment that builds when one party remembers the terms differently, or when siblings perceive unfairness. If you have multiple children, consider whether the loan should be offset against the borrower’s inheritance to maintain equity among your heirs — and document that decision explicitly in both the loan agreement and your will.
What to Do Right Now
If you are about to lend money to your child, or if you already have and lack proper documentation, take these steps immediately. First, instruct a solicitor experienced in family financial arrangements to draft or review a loan agreement executed as a deed. Second, ensure the agreement is disclosed to any mortgage lender involved — do not sign a gifted deposit letter if the money is a loan. Third, take independent tax advice on income tax, IHT, and SDLT implications before any money changes hands. Fourth, if property is involved, register a second charge or at minimum a restriction on the title. Finally, have an honest conversation with your child and their partner about what happens if things go wrong — because the time to negotiate exit terms is before anyone is angry, broke, or heartbroken.
Disclaimer: The information provided in this article is for informational purposes only and should not be considered financial or legal advice. Property and lending laws in the United Kingdom vary and may change over time. We always recommend consulting with a qualified solicitor and mortgage broker before entering into a property purchase or financial arrangement with another party.
