If you’ve lent money to a family member — whether to help with a house deposit, bridge a career gap, or fund a business venture — there is a legal time bomb quietly ticking in the background. In England and Wales, the Limitation Act 1980 gives you just six years to enforce most debts through the courts. Miss that window, and your loan may become legally unrecoverable, regardless of how much you lent or how clear the understanding was between you and your borrower. For parents who’ve handed over five or six figures to help a child onto the property ladder, this isn’t an abstract legal curiosity. It’s the difference between getting your money back and watching it evaporate.
How the Six-Year Clock Actually Works
Under section 5 of the Limitation Act 1980, an action to recover a simple contract debt must be brought within six years from the date the cause of action accrued. For a loan repayable on demand — which is how most undocumented family loans are treated — the cause of action accrues the moment the money is transferred. Not when you first ask for it back. Not when the relationship sours. The day it leaves your account.
This catches almost everyone off guard. Most parents assume the clock starts when they formally demand repayment. The courts disagree. In the absence of a written agreement specifying repayment terms, the law treats the debt as immediately due, and the limitation period begins running from day one.
Here’s where it gets worse. If six years pass without a repayment, a written acknowledgement of the debt, or court proceedings, the debt becomes statute-barred. Your borrower can raise the limitation defence, and the court will refuse to enforce the debt — even if everyone involved agrees the money was a loan.
Deed vs Simple Contract: The 12-Year Option Most People Miss
There is a powerful but underused tool that doubles your enforcement window. Under section 8 of the Limitation Act 1980, if the loan agreement is executed as a deed rather than a simple contract, the limitation period extends to twelve years. A deed must be signed, witnessed, and delivered — the formalities are slightly more involved, but for any loan above a few thousand pounds, the additional protection is well worth the modest cost of having a solicitor prepare it.
This distinction matters enormously in property scenarios. If you’ve contributed £50,000 towards a child’s house deposit with the understanding it will be repaid when the property is sold, and that property isn’t sold for eight years, a simple contract loan is already statute-barred. A deed gives you four more years of breathing room. For large, long-term family loans, there is simply no good reason not to use a deed.
Resetting the Clock: Acknowledgement and Part Payment
Sections 29 and 30 of the Limitation Act 1980 provide two mechanisms to restart the limitation period:
- Written acknowledgement: If the borrower signs a document acknowledging the debt, the six-year (or twelve-year) period restarts from the date of that acknowledgement.
- Part payment: Any payment made by the borrower towards the principal or interest restarts the clock from the date of that payment.
Critically, the acknowledgement must be in writing and signed by the borrower. A verbal conversation, a text message where they mention the loan casually, or a WhatsApp exchange may not meet the statutory threshold. If your family loan is undocumented and approaching the six-year mark, get a signed written acknowledgement immediately. Even a simple letter stating “I acknowledge that I owe [parent’s name] £X, being the balance of a loan made on [date]” — signed and dated — can reset the clock and preserve your legal position.
The Divorce and Separation Risk
This is where limitation periods collide with family law in the most damaging way. When a couple divorces, the family court examines all assets and liabilities within the matrimonial pot. A genuine, documented loan from a parent is typically treated as a liability that reduces the net assets available for division. But an undocumented, statute-barred loan? The other spouse’s solicitor will argue — often successfully — that it was a gift, or that it’s unenforceable and should be disregarded.
The result: your £80,000 contribution to your child’s house deposit gets split with their ex-partner. You recover nothing. This isn’t a theoretical risk; it plays out in financial remedy proceedings with depressing regularity. A properly drafted loan agreement, ideally executed as a deed and secured by a legal charge against the property, is the single most effective protection against this outcome.
Property Co-Ownership: Where Limitation Meets TOLATA
Family loans frequently intersect with co-ownership arrangements. If you’ve lent money for a deposit and your name isn’t on the title, you may have a beneficial interest in the property — but only if you can prove it. Under the Trusts of Land and Appointment of Trustees Act 1996 (TOLATA), either party to a property trust dispute can apply to court to determine beneficial interests or force a sale. Without a Declaration of Trust documenting your interest, you’re relying on constructive trust arguments, which are expensive, uncertain, and heavily dependent on evidence that deteriorates over time.
A Declaration of Trust should specify whether your contribution creates a beneficial interest in the property or constitutes a loan repayable on sale. These are fundamentally different legal arrangements with different tax consequences — particularly for Capital Gains Tax and Inheritance Tax — and conflating them is a common and costly mistake.
Tax Implications That Compound the Problem
HMRC doesn’t ignore large family transfers. If a loan is later reclassified as a gift — whether by a court finding it statute-barred or through inadequate documentation — there are immediate Inheritance Tax implications. A gift from a parent that exceeds the annual exemptions becomes a potentially exempt transfer (PET). If the parent dies within seven years, it falls back into the estate for IHT purposes. If the parent intended it as a loan but failed to document it, HMRC may treat it as a gift from the date of transfer, potentially catching the family off guard on a nil-rate band calculation.
For property purchases specifically, remember the Stamp Duty Land Tax surcharge. If either co-buyer already owns residential property anywhere in the world, the 3% higher rate applies to the entire purchase price. Parents who go on the title to “protect” their loan interest can inadvertently trigger thousands of pounds in additional SDLT for their child.
What a Proper Family Loan Agreement Should Contain
A robust family loan agreement — ideally executed as a deed — should address at minimum:
- The principal amount and date of advance
- Whether interest is charged (and if so, at what rate — note that a below-market rate may have IHT implications as a transfer of value)
- A specific repayment schedule, or clear trigger events for repayment (e.g., sale of property, refinance, or a longstop date)
- Security provisions — whether the loan is secured by a legal charge against the property
- What happens on the borrower’s death, bankruptcy, or divorce
- Annual written acknowledgement provisions to prevent limitation issues arising
- A clause confirming the loan is not a gift and is not to be treated as an advance on inheritance
Act Now, Not When It’s Too Late
If you have an existing undocumented family loan, the most important thing you can do today is get a signed, written acknowledgement of the debt from the borrower. Tomorrow, instruct a solicitor to prepare a formal loan agreement — executed as a deed — that replaces any informal arrangement. If the loan relates to property, consider whether a legal charge or a Declaration of Trust is appropriate. These steps cost a few hundred pounds. Failing to take them can cost tens or hundreds of thousands. The limitation clock does not pause for good intentions, and the courts have no power to extend it simply because the parties are family. Treat your generosity with the legal seriousness it deserves.
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.
