Doctrine of Tacking and Rule in Clayton's Case

The doctrine of tacking and the rule in Clayton's Case are two English equity doctrines that touch the priorities of secured creditors over the same property. Tacking is the rule that allowed a later mortgagee to add (or "tack") a further advance to his original security and so jump over an intermediate mortgagee whose rights were already on the property. Section 93 of the Transfer of Property Act, 1882 abolishes tacking in India. The rule in Clayton's Case — properly Devaynes v Noble (1816) 1 Mer 572 — is the rule of appropriation in current accounts: the first item on the debit side of an account is taken to be discharged by the first item on the credit side. The two doctrines look very different, but the exam joins them because both decide what becomes of an existing security when fresh advances are made on a running account, and the first answers a question about priority while the second answers a question about appropriation.

The two doctrines together govern much of the law of bank overdrafts and floating charges in India. The aspirant who masters them masters the way the law of mortgage under Section 58, the law of accounts under the Indian Contract Act, 1872, and the law of running balances in current accounts mesh into a single working rule of priorities. The same doctrines bear on the way successive charges under Section 100 are ranked when the mortgagor or charger borrows further from the same lender.

Statutory text — Section 93

Section 93 of the Act is the abolition section. It reads: "No mortgagee paying off a prior mortgage, whether with or without notice of an intermediate mortgage, shall thereby acquire any priority in respect of his original security; and, except in the case provided for by section 79, no mortgagee making a subsequent advance to the mortgagor, whether with or without notice of an intermediate mortgage, shall thereby acquire any priority in respect of such subsequent advance."

The section does two things. First, it shuts the door on the English doctrine of tacking by purchase — the rule that allowed a third mortgagee, on paying off the first, to use the first's priority to leapfrog the second. Second, it shuts the door on the English doctrine of tacking by further advances — the rule that allowed the first mortgagee, on making a fresh advance to the mortgagor, to add the fresh advance to his first mortgage and so secure it ahead of the second mortgage. The exception preserved is Section 79, which deals with mortgages to secure uncertain amounts where the maximum is named in the deed.

Tacking — what it was in English law

Tacking was an English equity doctrine that took two forms. The classical form, established in Marsh v Lee (1670) 2 Vent 337 and confirmed in a long line of decisions, was tacking by purchase or the "tabula in naufragio" rule (the plank in the shipwreck). A third mortgagee who took without notice of the second mortgage and afterwards bought up the legal estate of the first mortgagee was allowed to tack the third mortgage to the first and so jump over the second. The doctrine rested on the equitable preference for the legal estate: the third mortgagee, having taken the first's legal estate without notice of the second's equitable estate, could combine the priority of the first with the substance of the third.

The second form was tacking by further advances. The first mortgagee who made a further advance to the mortgagor was allowed to add the further advance to his first mortgage and to enforce both for the same priority, even where an intermediate mortgagee had come on the property between the original advance and the further advance — provided the first mortgagee had no notice of the intermediate mortgage at the date of the further advance. The rule was settled by the House of Lords in Hopkinson v Rolt (1861) 9 HLC 514 in its modern form: notice of the intermediate mortgage stops the first mortgagee from tacking the further advance, but absence of notice allowed the tacking. The decision in Hopkinson v Rolt remains the foundational English authority on the subject and was reasserted on different facts in Bradford Banking Co v Briggs (1886) 12 App Cas 29.

Both forms of tacking produced injustice for the intermediate mortgagee, who lost his priority by the act of two parties (the mortgagor and the first or third mortgagee) to which he was not privy. The Indian legislature, when it enacted the Act in 1882, regarded the doctrine as an unsuitable graft on the Indian property system. Section 93 abolished both forms.

Why Section 93 abolishes tacking

The abolition is the legislative answer to two problems that the English rule produced in the Indian context. First, the Indian Registration Act, 1908 makes registration of mortgages compulsory and gives a public record of priorities; Explanation I to Section 3 of the Act makes registration constructive notice — actual and constructive. Where the priorities are visible on the register, the equity that allowed a third mortgagee to leapfrog by buying the first's legal estate is unnecessary and produces only confusion. Second, the doctrine of tacking by further advances depends on a finely calibrated rule of notice that does not sit well with a register-based system. Section 93 cuts the knot.

The result, in India, is that priorities are determined by the order in which mortgages are made (with the registration date supplying the public marker) and not by any later act of acquisition or further advance. A later mortgagee who pays off a prior mortgage takes the prior mortgage's priority by way of subrogation under Section 92, but he cannot use it to secure his own original loan; the original loan continues to rank where it was. A first mortgagee who makes a further advance secures only the fresh advance against the property, in priority below any intermediate mortgage of which he had notice (or, in fact, irrespective of notice).

The exception — Section 79 and mortgages of maximum amount

Section 93's exception preserves the operation of Section 79. Section 79 deals with the case of a mortgage made to secure future advances up to a maximum sum named in the mortgage deed. Where the deed names a maximum, advances made up to that maximum are secured by the mortgage with the priority of the original mortgage, even as against an intermediate mortgagee who has come on the property between the original mortgage and the further advance. The condition is publicity: the maximum must be named in the registered deed, so that the world is on notice of the cap.

The Section 79 exception is the registration-based equivalent of tacking by further advances. It permits the first mortgagee to make further advances on the security of his original mortgage, with priority against intermediate encumbrancers, but only because the cap is on the public register and any intermediate mortgagee takes with notice of it. Outside the Section 79 case, the rule of Section 93 is absolute: no priority for further advances. The provision sits comfortably with the wider scheme of operation of transfer under Sections 8 to 11, under which interests pass in the order they are created and the public record settles disputes about priority.

Section 93 and the priority rules

Section 93 sits in the same group of provisions as Sections 78, 79, 81 and 82, and is best read with them. Section 78 displaces the prior mortgagee's priority where his fraud, misrepresentation or gross neglect has induced a subsequent mortgagee to advance money — the same gross-negligence test that the doctrine of Lloyds Bank v PE Guzdar & Co AIR 1930 Cal 22 applies to constructive notice, applied here to the question of priority. Section 79 supplies the maximum-amount exception just discussed. Section 81 enacts the doctrine of marshalling — the prior mortgagee with two properties as security must so realise his debt as not to defeat a subsequent mortgagee with only one of those properties. Section 82 enacts the rule of contribution among mortgagors of distinct properties to a common mortgage, examined under marshalling and contribution. Section 93 closes the priority architecture by fixing that mortgages take their place in the order in which they are made, with the corresponding obligations of the mortgagor under Sections 60 to 66 remaining unaffected by the abolition.

The rule in Clayton's Case

The rule in Clayton's Case is a rule of appropriation, not of priority. The case is Devaynes v Noble (1816) 1 Mer 572; the relevant judgment, given by Sir William Grant MR, dealt with the affairs of a banking partnership of which Devaynes had been a partner. After Devaynes' death the surviving partners continued to do business with the firm's customers; the question was whether payments made by the customers after the death discharged the firm's pre-death liabilities to those customers, or whether the customers' withdrawals out of the post-death balance discharged only the post-death liabilities. The Master of the Rolls answered the question by the now-famous rule: in a current account, the first item on the debit side is taken to be discharged by the first item on the credit side, in order of date. The rule is one of presumed appropriation of payments to debts in a running account, applied where the parties have not themselves appropriated.

Clayton's Case in operation

The mechanics are simple. A bank customer, who must himself be competent to transfer under Section 7 in order to give a valid security, has a current account with successive credits (deposits) and debits (withdrawals or borrowings). At any moment, the balance owed by the customer is the algebraic sum of all credits and debits to date. Where the law has to ask whether a particular debit is paid or unpaid — for example, because the bank's security covered only debits up to a certain date, or because a guarantor's liability was for the balance as on a certain date — the rule says that credits are appropriated to debits in chronological order. The earliest debit is paid by the earliest credit; the next debit by the next credit; and so on. The result is that, on a running account, the older debits are progressively wiped out by fresh credits, and a guarantor or security-holder for the older debits may find that the security has been exhausted by the operation of the rule.

The English foundation — Devaynes v Noble and Deeley v Lloyds Bank

The rule has been confirmed and refined in successive English decisions. Deeley v Lloyds Bank [1912] AC 756 is the leading modern English application. The bank held an equitable mortgage from a customer to secure his overdraft; afterwards a second mortgagee gave notice to the bank of his second mortgage. The bank continued the customer's running account, allowing further withdrawals and accepting fresh deposits. The House of Lords held that the rule in Clayton's Case applied: the deposits made after the bank had notice of the second mortgage were appropriated to the older debits, with the result that the bank's security for the older debits was progressively reduced and the second mortgagee's priority was correspondingly enlarged. The case is the textbook illustration of how Clayton's Case operates in a banking context.

Excluding Clayton's Case — the standard banking practice

The rule in Clayton's Case is a rule of presumption only. It applies where the parties have not themselves appropriated payments. Modern banking practice in India almost always excludes the rule by an express term in the account-opening documents or in the security documents: the bank reserves the right to appropriate any credit to any debit at its discretion, or stipulates that the security covers all sums due at any time. Where the exclusion is effective, Clayton's Case is displaced and the bank's older security is preserved against the consequences the rule would otherwise produce. The aspirant should therefore read the security documents before applying the rule mechanically; the rule is the default, not the result.

Clayton's Case in India — survival as appropriation rule

Section 93 of the Act abolishes tacking but says nothing about appropriation in current accounts. The rule in Clayton's Case survives in India as a rule of appropriation, applicable to bank overdrafts, to running accounts of any kind, and to the relations between guarantors and the principal debtor where there is a running account. The Supreme Court in State Bank of India v Indexport Registered (1992) 3 SCC 159 and the line of cases dealing with bank overdraft accounts confirm that, in the absence of express appropriation, the rule applies; the older Indian authority is reflected in the Privy Council's reasoning in cases on guarantors' liability and the Calcutta High Court's application in cases on continuing guarantees. The same principle bears on a bank that holds a Section 100 charge on the customer's property to secure a running balance.

The rule is most often met in practice in two situations. The first is the case of the surety for a current account. A guarantee for the balance of a running account, where the surety revokes the guarantee or the relationship terminates by death or insolvency, is fixed at the balance on the date of revocation; subsequent credits are appropriated by the rule to the older (guaranteed) debits and so progressively reduce the surety's liability. The second is the case of the mortgagee who learns of a second mortgage and must decide whether to continue the running account. Where he continues without ruling off the account, the rule in Clayton's Case works against him as it did against the bank in Deeley v Lloyds Bank; where he rules off the account on receipt of notice, fresh advances are kept distinct from the old security and the priority of the original mortgage is preserved.

Why bankers rule off accounts

The practice of "ruling off" the account on receipt of notice of a second mortgage is the working response to Deeley v Lloyds Bank. The first mortgagee, on receiving notice of a second mortgage of property capable of being transferred under Section 6, opens a fresh account for further dealings with the customer. The old account is closed at the balance then due; subsequent credits are credited to the new account; subsequent debits are debited to the new account. The result is that the rule in Clayton's Case applies only within each account and not across the two; the old account's balance is not reduced by the new account's credits, and the first mortgagee's security for the old account is preserved at the figure on the date of notice. The practice is now standard in Indian banking and is reflected in standard form security documents.

Tacking and Clayton's Case — joined for the exam

The two doctrines look at the same factual situation — successive advances on the same security — from two different angles. Tacking asks whether the further advance can be added to the original security with priority over an intermediate mortgagee; Section 93 says no. Clayton's Case asks whether subsequent credits in a running account discharge the older debits or the newer ones; the rule says they discharge the older. Both rules together regulate what happens when a running account is run on a security: the further advance has its own priority (as a fresh, junior mortgage); the older balance is progressively discharged by the credits unless the rule is excluded or the account is ruled off.

The exam question is usually a fact pattern in which a bank holds an equitable mortgage from a customer for the customer's overdraft, learns of a second mortgage, continues the account without ruling off, and then sues to enforce its security. The aspirant should answer in two stages. First, by Section 93, the bank cannot tack the further advances made after notice to the original security; the further advances rank below the second mortgage. Second, by the rule in Clayton's Case, the credits made after notice are appropriated to the older debits — the debits the bank was entitled to assert against the second mortgagee — so that the original balance is progressively reduced and the bank's enforceable security against the second mortgagee shrinks accordingly. The two operate together, and the bank's failure to rule off the account is the source of its loss.

Conditions and limits of the rule in Clayton's Case

1. There must be a single running account between the parties — separate accounts are not aggregated under the rule.
2. The parties must not themselves have appropriated payments to particular debits — express appropriation by either party at the time of payment displaces the rule.
3. The rule does not apply where the credit is given for a specific purpose other than payment of the running balance.
4. The rule does not operate to discharge debits that are themselves not part of the running account — for example, a separate term loan from the same lender is not affected by credits on the current account unless the parties have so agreed.
5. The rule may be excluded by express agreement; standard banking documents almost always do exclude it.

Conditions and limits of the abolition under Section 93

1. Section 93 applies to mortgages governed by the Act — mortgages of immovable property as defined in the Section 3 definitions of immovable property; movable-property securities are governed by other statutes.
2. The abolition extends to both forms of tacking — by purchase and by further advances.
3. The Section 79 exception preserves the priority of further advances up to a maximum amount named in the registered deed.
4. The rule does not affect the doctrine of subrogation — a redeeming creditor still takes the prior mortgagee's priority by Section 92, but cannot use it to leapfrog with his own original loan.
5. The rule does not affect appropriation under Clayton's Case — the two doctrines occupy different fields.

Worked illustrations

Illustration 1 — tacking by purchase abolished. A mortgages his land first to B for 5 lakh, then to C for 3 lakh, then to D for 2 lakh. D, without notice of C's mortgage, pays off B's mortgage and obtains an assignment of B's legal estate. In English law before Section 93, D could have tacked his 2-lakh mortgage to B's 5-lakh first mortgage and ranked first to the extent of 7 lakh, leaving C in the cold. By Section 93, D acquires no priority for his original 2-lakh advance; he is subrogated to B's 5-lakh first mortgage by Section 92, but his own 2-lakh advance continues to rank where it was — third, behind C.

Illustration 2 — tacking by further advances abolished. A mortgages to B for 5 lakh; C then takes a second mortgage for 3 lakh; B, with notice of C's mortgage, makes a further advance to A of 2 lakh. In English law, the notice would prevent tacking and B's further advance would rank below C's mortgage; in Indian law, even without notice, B's further advance ranks below C's mortgage, by force of Section 93. The exception is Section 79 — if B's original mortgage named a maximum of 7 lakh, the further advance would secure ahead of C's mortgage, but only because the cap was on the register from the outset.

Illustration 3 — Clayton's Case in a bank overdraft. A customer has an overdraft account with a bank, secured by an equitable mortgage of the customer's house, with a balance due of 10 lakh. A second mortgagee gives notice to the bank of his second mortgage. The bank does not rule off the account; the customer pays in 4 lakh and draws out 4 lakh over the next month. By the rule in Clayton's Case, the 4 lakh credits are appropriated to the oldest 4 lakh of debits; the bank's security for the original 10-lakh balance is reduced to 6 lakh, and the second mortgagee gains correspondingly. The result of Deeley v Lloyds Bank would be the same in India.

Illustration 4 — exclusion of Clayton's Case. Same facts as Illustration 3, but the bank's account-opening documents reserve the right to appropriate any credit to any debit at the bank's discretion, and the security document stipulates that the mortgage covers all sums due at any time. The rule in Clayton's Case is excluded; the credits are not automatically appropriated to the oldest debits, and the bank's security for the original balance is preserved up to its current level. The aspirant should always check whether the exclusion is in the documents.

Distinctions for the exam

Tacking versus subrogation

Tacking would have allowed the third mortgagee to take the priority of the first for his own advance; subrogation under Section 92 allows him to take the priority of the first only for the discharge of the first. Tacking is abolished by Section 93; subrogation is preserved by Section 92. The two are opposite sides of the same factual situation.

Tacking versus Clayton's Case

Tacking is a rule of priority — does the further advance rank with the original security against the intermediate mortgagee? Clayton's Case is a rule of appropriation — which debits are paid by the credits in a running account? The first decides the order in which mortgages rank; the second decides how much of the senior mortgage is still alive after a course of dealing on the running account.

Section 79 versus Section 93

Section 79 is the exception to Section 93 — it permits priority for further advances up to a maximum named in the registered mortgage deed. Section 93 is the general rule of abolition. The aspirant should always check whether the original mortgage deed names a maximum; if it does, Section 79 governs and the further advance has priority within the cap; if it does not, Section 93 governs and the further advance has no priority for its own amount.

Clayton's Case versus express appropriation

Clayton's Case is the default rule of appropriation in current accounts. Express appropriation by either party at the time of payment, or a standing term in the documents allowing the creditor to appropriate at his discretion, displaces the rule. The exam fact pattern almost always turns on whether the bank had effective exclusion language in its standard documents.

Modern relevance — bank overdrafts and floating charges

The two doctrines remain alive in the modern context of bank overdrafts and corporate floating charges. A bank that lends on a current-account overdraft and takes an equitable mortgage of the customer's property must, on receiving notice of a second mortgage or a floating charge in favour of another creditor, rule off the account or risk the operation of Clayton's Case against it. A first mortgagee who proposes to make a further advance must check the registered deed for a maximum-amount clause under Section 79; if there is none, the further advance will rank below any intermediate mortgage of which the world had notice. The aspirant who can run these checks on a fact pattern will answer most exam questions on the topic in the right framework.

The same doctrines bear on the relations between successive secured creditors of a company, where the company law statutes (Companies Act, 2013, Sections 77–87) supply the registration regime and the priorities are policed by a combination of the company-law rules and the general rules of the Act. A floating charge crystallises on default or on the appointment of a receiver; once crystallised, it ranks as a fixed charge and the rules of Sections 78, 79, 81, 82 and 93 of the Act apply to its priority against other secured creditors of the company. A transfer of company property pendente lite of an enforcement suit will be governed by the doctrine of lis pendens under Section 52, which works alongside the priority architecture rather than displacing it.

Why Section 93 and Clayton's Case matter

Section 93 closes off a doctrine that the Indian legislature regarded as inconsistent with a register-based property system; the rule in Clayton's Case remains in operation as a rule of appropriation in current accounts that no statute has displaced. Together they police the boundary between the law of priorities (governed by registration and the order of mortgages) and the law of appropriation (governed by the parties' agreement, with the rule in Clayton's Case as the residual default). The aspirant who has the two doctrines in clear separation can answer the priority question and the appropriation question without confusion.

The working method on a Section 93 / Clayton's Case problem should be: identify the parties (mortgagor, first mortgagee, intermediate mortgagee, third mortgagee or subsequent advance); identify the act that is said to disturb the priority (a redemption, a further advance, a course of dealing on a current account); apply Section 93 to the priority question; apply Clayton's Case to the appropriation question; check the documents for any express exclusion or for the Section 79 maximum-amount clause; and read the result against the surrounding rules of rights and liabilities of the mortgagee and the priority architecture of the Act.

Frequently asked questions

What is the doctrine of tacking and is it recognised in Indian law?

Tacking was an English equity doctrine under which a later mortgagee could add a further advance, or the priority of a paid-off prior mortgage, to his own security and so leapfrog over an intermediate mortgagee. It took two forms: tacking by purchase (Marsh v Lee), under which a third mortgagee who took without notice of the second and bought up the first's legal estate could rank first for his own advance; and tacking by further advances (Hopkinson v Rolt), under which a first mortgagee who made a further advance without notice of an intermediate mortgage could rank the further advance with the original security. Section 93 of the Transfer of Property Act, 1882 abolishes both forms in India. The only exception preserved is Section 79, which permits priority for further advances up to a maximum amount named in the registered mortgage deed.

What is the rule in Clayton's Case and what does it actually decide?

The rule in Clayton's Case — properly Devaynes v Noble (1816) 1 Mer 572 — is a rule of appropriation in current accounts, given by Sir William Grant MR. In a running account between two parties, the first item on the debit side is taken to be discharged by the first item on the credit side, in order of date. The credits are appropriated to debits chronologically, so that the older debits are progressively wiped out by fresh credits unless the parties themselves appropriate or have agreed to displace the rule. The doctrine is one of presumed appropriation only and is excluded in modern Indian banking practice by standard form security documents that reserve the bank's right to appropriate any credit to any debit at its discretion.

How does Clayton's Case operate in a bank overdraft when the bank receives notice of a second mortgage?

Where the bank holds an equitable mortgage to secure the customer's running overdraft and receives notice of a second mortgage, the bank must rule off the account to preserve its security for the existing balance. If the bank does not rule off, the rule in Clayton's Case appropriates subsequent credits to the older (pre-notice) debits, which progressively reduces the security the bank can assert against the second mortgagee. The leading English application is Deeley v Lloyds Bank [1912] AC 756, where the House of Lords held that the bank's failure to rule off the account, after notice of the second mortgage, allowed the rule to operate and reduced the bank's enforceable security correspondingly. Indian banks now routinely rule off accounts on receipt of notice for exactly this reason.

What is the exception to Section 93 under Section 79 of the Transfer of Property Act?

Section 79 preserves the priority of further advances where the original mortgage deed names a maximum sum to be secured. Where the maximum is named in the registered deed, advances made up to that maximum rank with the original mortgage in priority over any intermediate mortgagee, even where the intermediate mortgage was created between the original advance and the further advance. The condition is publicity — the maximum must be on the public register, so that any intermediate mortgagee takes with notice of it. Section 79 is the registration-based equivalent of tacking by further advances; outside its operation, Section 93's general rule of abolition applies and a further advance has no priority for its own amount.

How does Section 93 differ from the doctrine of subrogation under Section 92?

Section 93 prevents a later mortgagee from acquiring any priority in respect of his own original security by paying off a prior mortgage; tacking is abolished. Section 92 allows the same redeeming creditor to be subrogated to the rights of the prior mortgagee — that is, to take the prior mortgagee's priority for the discharge of the prior mortgage. The two rules occupy different fields: Section 93 closes off the possibility of leapfrogging with one's own loan; Section 92 preserves the priority of the discharged senior debt in the redeemer's hand. A puisne mortgagee who pays off a prior mortgage takes the prior mortgagee's priority for the amount paid, but his own original loan continues to rank where it was.

Can the rule in Clayton's Case be excluded by agreement, and how do Indian banks do so?

Yes. The rule in Clayton's Case is a rule of presumed appropriation only, applicable where the parties have not themselves appropriated. The rule may be excluded by express agreement, and modern Indian banking practice almost always does so. The standard exclusion language in account-opening documents reserves the bank's right to appropriate any credit to any debit at the bank's sole discretion; the security documents stipulate that the mortgage covers all sums due at any time. Where the exclusion is effective, the rule does not operate, and the bank's security for the older debits is preserved against the consequences the rule would otherwise produce. The aspirant facing a fact pattern on Clayton's Case should always check whether the documents contain an effective exclusion before applying the rule mechanically.