Loan Agreement UK: Key Terms & How They Work

What this document is

A Loan Agreement is a written contract between a lender and a borrower that records the amount being lent, how and when it has to be repaid, and the rules that both sides agree to follow while the loan is outstanding. In legal terms it creates a debt obligation, and once signed it's enforceable in the same way as any other commercial contract in England and Wales.

People use them across a wide range of situations: parents lending a deposit to an adult child, company directors putting money into their own business, one business extending credit to another, or private individuals making an informal investment in a venture they believe in. The document doesn't have to be long, but it does need to be clear.

The core purpose is to remove ambiguity, so that six months or six years down the line, nobody is arguing about whether the money was a loan or a gift, or whether interest was ever meant to be charged. Written properly, it protects the lender's right to recover the money and gives the borrower certainty about what they owe.

How to use this document

1. Agree the commercial terms first. Before anyone drafts anything, both sides need to settle the headline numbers: the amount, the interest rate (if any), the repayment schedule, and the final date for repayment. Getting this nailed down in conversation first saves a lot of back-and-forth once the drafting begins and avoids awkward renegotiation later.
2. Decide whether the loan is secured or unsecured. A secured loan gives the lender the right to recover a specific asset if the borrower defaults, which usually means registering a charge over property or other valuable assets. An unsecured loan relies purely on the borrower's promise to pay. Security changes the risk profile significantly and often influences the interest rate that feels fair.
3. Consider whether a guarantor is needed. If the borrower's financial position is uncertain, or if you're lending to a company with limited trading history, a personal guarantee from a director or third party can give the lender meaningful extra comfort. The guarantor has to sign the agreement themselves and should understand exactly what they're taking on.
4. Draft the agreement in writing and cover the edge cases. Good Loan Agreements don't just describe the happy path. They also set out what happens if the borrower misses a payment, wants to repay early, falls into insolvency, or wants to transfer the debt. Including default provisions, prepayment rights, and dispute resolution clauses now is far cheaper than arguing about them later.
5. Sign, date, and keep copies safe. Both parties should sign the final version, date it clearly, and each retain an original. If the loan is secured against property or registrable assets, there may be additional formalities to complete, such as registering the charge at Companies House within the statutory deadline where the borrower is a company.

Common questions