What Resets the 6-Year Debt Clock: Payment vs Written Acknowledgement

PersonalFinanceClarity.com — How UK personal finance systems actually work.

In the UK, most unsecured debts — credit cards, personal loans, store cards, catalogues, and unpaid invoices — are subject to a limitation period. After this period expires without certain events occurring, the debt becomes what is commonly known as "statute-barred," meaning a creditor can no longer enforce it through the courts.

Two specific actions can reset this limitation clock: making a payment towards the debt, and providing a written acknowledgement of it. These two actions operate under different legal rules and carry different consequences, particularly for joint debts. Understanding the distinction is essential, because a single misstep — even a small payment or a carelessly worded letter — can restart the entire clock.

This guide explains the legal framework governing both triggers across all UK jurisdictions, including the important differences between England and Wales, Northern Ireland, and Scotland.

The standard limitation period for most unsecured debts is six years in England, Wales, and Northern Ireland, and five years in Scotland. Two events can reset this clock:

• Payment — any payment made towards the debt, including a part payment of any amount, restarts the limitation period from the date of that payment. There is no minimum threshold. A payment of interest is also treated as a payment in respect of the principal debt.
• Written acknowledgement — a written, signed admission that the debt exists restarts the limitation period from the date of that acknowledgement. Verbal acknowledgement does not count. The acknowledgement must be unequivocal — it must clearly admit the debt still exists.

There is one critical difference between the two: in a joint debt, a payment by one debtor resets the clock for all co-debtors, but a written acknowledgement by one debtor resets the clock only for the person who made it.

Once a debt has become statute-barred (or "prescribed" in Scotland), neither payment nor acknowledgement can revive it.

The Limitation Period

The limitation period begins when the "cause of action accrues" — in plain terms, when the debt becomes due for payment. For most debts, this is the date of the first missed contractual payment. For credit agreements regulated under the Consumer Credit Act 1974, a default notice must be issued before a creditor can enforce the agreement, but the issuing or expiry of a default notice does not necessarily define when the limitation period begins. The cause of action for limitation purposes generally accrues on the first missed payment, not on the date the default notice expires.

From that date, the creditor has a fixed window in which to bring court proceedings. If no qualifying event interrupts that window, the debt becomes statute-barred.

The governing legislation varies by jurisdiction. In England and Wales, the Limitation Act 1980 applies (Section 5 sets the six-year period). In Northern Ireland, the Limitation (Northern Ireland) Order 1989 governs the equivalent rules. In Scotland, the Prescription and Limitation (Scotland) Act 1973, as amended by the Prescription (Scotland) Act 2018, applies a five-year prescriptive period under Section 6.

A Key Distinction: Limitation vs Prescription

The legal effect of the clock expiring differs between jurisdictions. In England, Wales, and Northern Ireland, limitation acts as a procedural bar — the debt technically still exists, but the creditor loses the right to enforce it through court action. In Scotland, the concept is "prescription," which extinguishes the obligation entirely. After five years of prescription in Scotland, the debt ceases to exist as a legal obligation.

The Two Reset Triggers

Both payment and written acknowledgement restart the clock, but they operate under distinct statutory provisions and have different practical implications.

Payment is governed by Section 29(5) of the Limitation Act 1980 in England and Wales, Article 65 of the Limitation (Northern Ireland) Order 1989, and the Prescription and Limitation (Scotland) Act 1973. In Scotland, payment is not treated under a separate statutory provision; rather, it falls within the concept of "relevant acknowledgement" under Section 10(1), as it constitutes performance towards implement of the obligation. Section 6 establishes the five-year prescriptive period. Any payment — regardless of size — made towards the debt during the existing limitation period triggers a fresh period of six years (or five years in Scotland) running from the date of that payment. Crucially, a payment of interest is treated as a payment in respect of the principal debt under Section 29(6) of the 1980 Act and Article 65(2) of the Northern Ireland Order.

Written acknowledgement is governed by Section 29(5) and Section 30(1) of the Limitation Act 1980, Article 57 and Article 59(1) of the Northern Ireland Order, and Section 10(1) of the Scottish 1973 Act. In England, Wales, and Northern Ireland, the acknowledgement must be "in writing and signed by the person making it." It must constitute an unequivocal admission that the debt exists. Verbal acknowledgement — including over the telephone — does not satisfy this requirement.

In Scotland, a "relevant acknowledgement" can take one of two forms: performance towards implement of the obligation (which includes making a payment) that clearly indicates the obligation still subsists, or an unequivocal written admission clearly acknowledging the obligation still subsists.

Limitation Periods by Jurisdiction

The standard periods for simple contract debts such as credit cards, personal loans, store cards, catalogues, and utility bills are as follows. In England, Wales, and Northern Ireland, the period is six years from the date the debt became due. In Scotland, the period is five years from the same date.

Requirements for Written Acknowledgement

In England, Wales, and Northern Ireland, a valid acknowledgement must be in writing, signed by the person making it, and must amount to an unequivocal admission that the debt exists. Courts have accepted emails as satisfying the "in writing and signed" requirement, but only where there is a clear intent to authenticate — for example, through a typed name or email signature block. It is not sufficient that the sender is merely identifiable. This remains a matter of interpretation rather than explicit statutory provision.

In Scotland, a written admission must be unequivocal and must clearly acknowledge that the obligation still subsists.

Requirements for Payment

Any payment, including a part payment of any amount, made in respect of the debt during the existing limitation period will reset the clock. There is no minimum amount specified in the legislation. Payment of interest is treated as payment in respect of the principal debt.

The Joint Debt Rule

This is one of the most consequential distinctions between the two triggers. Under Section 31(7) of the Limitation Act 1980 and Article 68(4) of the Northern Ireland Order, a payment by one joint debtor resets the limitation period for all co-debtors. In Scotland, Section 10 of the 1973 Act produces the same practical effect — payment by one obligant constitutes performance that interrupts prescription for the obligation as a whole — although Scottish law conceptualises joint obligations differently from the framework in England, Wales, and Northern Ireland.

However, under Section 31(6) of the 1980 Act and Article 60(4) of the Northern Ireland Order, a written acknowledgement by one joint debtor binds only the person who made it. The clock is not reset for other co-debtors. In Scotland, Section 10(2) of the 1973 Act achieves a comparable result — a written acknowledgement by one obligant does not bind others — though the statutory structure reflects Scotland's distinct approach to joint obligations.

Timing: Must Occur Within the Existing Period

Both payment and acknowledgement must occur within the existing limitation period to have any resetting effect. Under Section 29(7) of the Limitation Act 1980, a right of action once barred cannot be revived by any subsequent acknowledgement or payment. In Scotland, once an obligation has prescribed, it ceases to exist — making revival a logical impossibility.

Special Limitation Periods

Certain debt types carry different limitation periods. [Mortgage shortfall debts](/mortgage-shortfall-debt-how-long-can-a-lender-chase-you) (the principal element) carry a twelve-year limitation period in England, Wales, and Northern Ireland under Section 20 of the Limitation Act 1980 (which governs actions to recover money secured by mortgage), while the interest element is subject to the standard six-year period. In Scotland, obligations constituted by court decree, Summary Warrant, or tribunal order are subject to a twenty-year long-stop prescription period. The Prescription (Scotland) Act 2018 commenced in stages; the changes to the twenty-year long-stop took effect from 28 February 2025, but apply only to obligations not already extinguished at that date. Under the amended rules, this twenty-year period can no longer be interrupted by acknowledgement or claim — it functions as a true long-stop.

HMRC tax debts, including income tax and VAT, have no limitation period in England, Wales, and Northern Ireland. Section 37(2) of the Limitation Act 1980 explicitly excludes proceedings for recovery of tax or duty from the limitation framework. National Insurance Contributions are generally subject to a six-year recovery limit, as NICs are not classified as "tax" for these purposes. However, HMRC also possesses special statutory recovery powers for NICs that differ from the civil limitation framework applicable to private debts.

"I only paid a small amount — surely that doesn't count?" There is no minimum payment threshold in the legislation. Any payment, however small, made towards the debt during the limitation period will reset the clock entirely. A payment of one pound has the same legal effect as a payment of one thousand pounds for these purposes.

"I admitted the debt over the phone — has the clock reset?" In England, Wales, and Northern Ireland, only written and signed acknowledgement resets the limitation period. A verbal admission — whether by telephone, in person, or otherwise — does not satisfy the statutory requirements under Section 30(1) of the Limitation Act 1980 or Article 59(1) of the Northern Ireland Order.

"The debt is statute-barred, but the creditor is still contacting me." In England, Wales, and Northern Ireland, a statute-barred debt still technically exists — the limitation period prevents court enforcement, not the existence of the debt itself. A creditor may still contact a debtor about a statute-barred debt. However, FCA-regulated firms are bound by conduct rules under CONC 7.15 of the FCA Handbook. CONC 7.15.4R restricts firms from pursuing payment where the firm knows or reasonably believes the debt is statute-barred and there has been no payment or acknowledgement during the limitation period. CONC 7.15.8R requires firms to cease demands when a customer states that the debt is statute-barred.

In Scotland, the position is different: once an obligation has prescribed, it is extinguished. It no longer exists as a legal obligation.

"My ex-partner acknowledged a joint debt — does that affect me?" Written acknowledgement by one joint debtor resets the clock only for the person who made the acknowledgement. It does not affect co-debtors. However, if one joint debtor makes a payment rather than a written acknowledgement, that payment resets the clock for all joint debtors.

"Limitation" vs "Prescription" — aren't they the same thing? They produce different legal outcomes. Limitation (in England, Wales, and Northern Ireland) bars the creditor's remedy but leaves the underlying debt intact. Prescription (in Scotland) extinguishes the obligation itself. This distinction matters because, in England, Wales, and Northern Ireland, a creditor can still pursue non-court recovery methods for a statute-barred debt (subject to FCA rules), whereas in Scotland, the obligation simply no longer exists.

• Scotland: Bills of Exchange and Promissory Notes Under Section 6(1) of the Prescription and Limitation (Scotland) Act 1973, there is a specific proviso for bills of exchange and promissory notes. For these instruments, written acknowledgement by the debtor cannot interrupt prescription — the subsection applies as if the acknowledgement provision were omitted. However, payment can still interrupt prescription, because payment is treated as performance towards implement of the obligation, which is a separate ground under Section 10(1).

• Scotland: Council Tax Arrears Following the 2018 Act amendments to Schedule 1 of the 1973 Act, council tax arrears in Scotland are now subject to the five-year prescriptive period. They were previously excluded. However, where a Summary Warrant has been obtained, the twenty-year prescriptive period may apply instead.

• Scotland: Standstill Agreements Under Section 13A of the 1973 Act (inserted by the 2018 Act), a creditor and debtor in Scotland may agree in writing to a standstill that extends the prescriptive period by a maximum of one year. This can only be agreed once per obligation and must be agreed after the prescriptive period has begun but before it expires. The agreement is binding only on its parties.

• Scotland: Burden of Proof Under the 2018 Act amendments, the burden of proof rests on the creditor to demonstrate that the obligation has not prescribed. Where ambiguity exists, there is a presumption that the obligation has been extinguished.

• Payment of Rent or Interest Under Section 29(6) of the Limitation Act 1980, payment of part of rent or interest due does not extend the limitation period for claiming the remainder of rent or interest then due. However, any payment of interest does restart the limitation period for the principal debt itself, because interest payments are treated as payments in respect of the principal.

• Post-Expiry Actions Cannot Revive the Clock Section 29(7) of the Limitation Act 1980 is explicit: "a right of action, once barred by this Act, shall not be revived by any subsequent acknowledgement or payment." This is a firm statutory rule. In Scotland, the position is even clearer — prescription extinguishes the obligation, so there is nothing left to revive.

The practical distinction between payment and written acknowledgement centres on three areas: the formality required, the scope of impact on joint debtors, and the ease with which the clock can be inadvertently reset.

Payment carries no formality requirement and no minimum amount. Any transfer of money towards the debt, no matter how small, resets the clock. This makes it the easier trigger to activate unintentionally. Written acknowledgement, by contrast, requires a deliberate, written, signed statement that unequivocally admits the debt exists. It is harder to trigger by accident, but it can be triggered by written correspondence that was not intended as a formal acknowledgement — provided it meets the statutory requirements.

For joint debts, the distinction is particularly significant. A payment by one party resets the clock for everyone on the debt. A written acknowledgement by one party affects only that individual. This asymmetry is grounded in statute and applies consistently across all UK jurisdictions.

The FCA's conduct rules add a regulatory layer. Under CONC 7.15, regulated firms face specific restrictions on pursuing statute-barred debts, including obligations to cease demands when a customer asserts that the debt is statute-barred. These rules apply to the firm's conduct, not to the underlying legal status of the debt.

What types of debt does the six-year limitation period apply to?

In England, Wales, and Northern Ireland, the six-year period applies to simple contract debts. This includes credit cards, personal loans, store cards, catalogues, utility bills, and unpaid invoices.

Is the limitation period different in Scotland?

Yes. Scotland applies a five-year prescriptive period under the Prescription and Limitation (Scotland) Act 1973. The legal effect is also different: prescription extinguishes the debt entirely, rather than merely barring court enforcement.

Does a verbal acknowledgement reset the clock?

No. In England, Wales, and Northern Ireland, the acknowledgement must be in writing and signed by the person making it. Verbal admissions, including those made by telephone, do not meet the statutory requirement.

Can an email count as written acknowledgement?

Courts have accepted emails as satisfying the "in writing and signed" requirement, but only where there is a clear intent to authenticate — for example, through a typed name or email signature block. It is not sufficient that the sender is merely identifiable. This remains an area of interpretation rather than settled statutory provision.

Is there a minimum payment that resets the clock?

No. The legislation specifies no minimum amount. Any payment made towards the debt during the limitation period, regardless of size, will reset the clock.

Does paying interest reset the clock for the main debt?

Yes. Under Section 29(6) of the Limitation Act 1980 and Article 65(2) of the Northern Ireland Order, any payment of interest is treated as a payment in respect of the principal debt.

What happens with joint debts?

Payment by one joint debtor resets the clock for all co-debtors. Written acknowledgement by one joint debtor resets the clock only for the person who made it. This distinction is consistent across all UK jurisdictions.

Can a statute-barred debt be revived?

No. Section 29(7) of the Limitation Act 1980 explicitly provides that a right of action, once barred, cannot be revived by any subsequent acknowledgement or payment. In Scotland, once an obligation has prescribed, it ceases to exist.

Do HMRC debts become statute-barred?

HMRC tax debts (income tax, VAT) have no limitation period in England, Wales, and Northern Ireland — they are explicitly excluded by Section 37(2) of the Limitation Act 1980. National Insurance Contributions are generally subject to a six-year recovery limit, as they are not classified as "tax" for these purposes, though HMRC also possesses special statutory recovery powers for NICs that differ from the civil limitation framework applicable to private debts.

What are the FCA rules on collecting statute-barred debts?

CONC 7.15 of the FCA Handbook establishes conduct rules for regulated firms. CONC 7.15.4R restricts firms from pursuing payment where the firm knows or reasonably believes the debt is statute-barred and there has been no payment or acknowledgement during the limitation period. CONC 7.15.8R requires firms to cease demands when a customer states that the debt is statute-barred.

• The limitation period for most unsecured debts is six years in England, Wales, and Northern Ireland, and five years in Scotland, running from when the debt became due for payment.
• Two actions reset this clock: any payment towards the debt (no minimum amount), and a written, signed, unequivocal acknowledgement of the debt. Verbal acknowledgement does not count.
• In joint debts, payment by one party resets the clock for everyone. Written acknowledgement resets it only for the person who made it.
• In England, Wales, and Northern Ireland, an expired limitation period bars court enforcement but does not erase the debt. In Scotland, prescription extinguishes the obligation entirely.
• Once a debt is statute-barred or prescribed, it cannot be revived by any subsequent payment or acknowledgement.
• Both payment and acknowledgement must occur during the existing limitation period to have any effect. The clock cannot be restarted after it has already expired.
• FCA-regulated firms are bound by CONC 7.15, which restricts recovery activity on statute-barred debts and requires firms to cease demands when a customer asserts the debt is statute-barred.

Related: The UK 6-Year Debt Rule | Scotland's 5-Year Rule | Replying About Statute-Barred Debt.