How Is Interest Claimed in a Summary Suit?

Interest in a summary suit: the short answer

Order XXXVII of the CPC lets you bring a summary suit for a debt or liquidated demand 'with or without interest'. So asking for interest isn't the issue. The basis is. Summary suits work because the amount comes from documents the defendant can't easily quarrel with. A rate in a loan agreement, a promissory note, a signed contract or a statute fits that neatly. A rate you picked after the fight started doesn't, and you can expect the defendant to make exactly that point.

In practice there are three periods. Pre-suit interest runs up to the filing date; you calculate it, add it to the principal, and it becomes part of the claim, court fee and all. Then there's interest while the case is pending (lawyers call it pendente lite) and interest after the decree until payment. You ask for both in the prayer. The court fixes the rate under Section 34 of the CPC.

This page is about pleading interest and getting it decided inside an Order 37 suit. For the wider question of what interest a creditor can expect in any recovery case, there's a separate guide on how much interest you can claim on unpaid dues.

The rules that decide interest in an Order 37 suit

Does adding interest stop the claim being a liquidated demand?

No. Defendants try it anyway. Order XXXVII expressly covers a debt or liquidated demand 'with or without interest', so principal plus interest is still a summary suit claim. What matters is whether the interest part is itself fixed, by your documents or by a statute. If it is, the whole claim stays inside Order 37.

Trouble starts when the rate isn't in any paper the defendant signed or accepted. The defence will say your 'interest' is really damages for delay, which a court has to assess, so the claim isn't liquidated. Courts haven't generally thrown out a summary suit on that ground alone where the principal is clearly proved. What tends to happen is that the principal moves ahead the summary way, and the disputed interest is either left to the court's discretion under Section 34 or turns into a triable issue with limited leave to defend on it.

Not fatal. Slower, though. Where a client's interest basis is thin, Advocate B.K. Singh usually advises pleading only what the documents or a statute support, and asking for pendente lite and future interest under Section 34 instead of puffing up the pre-suit figure. Claim 24 percent compound interest on the strength of one WhatsApp message and you've handed the defendant a ready line: the whole claim is exaggerated. That line can colour how the court sees leave to defend on the principal as well.

A rate written into a loan agreement, note or signed contract

Best case. When a loan agreement, an inter-corporate deposit letter, a promissory note or a signed supply contract fixes the rate, interest is part of the liquidated demand. Your plaint sets out the rate, the clause, the period and the working. The summons for judgment can then ask for a decree for principal and interest as specified.

Two things draw fire. First, default interest. Picture a clause that says 12 percent, going up to 24 percent on any default. Under the Explanation to Section 74 of the Indian Contract Act, 1872, a stipulation for higher interest from the date of default may be a penalty, and courts often bring such a rate down to the normal contract rate or to what they see as reasonable compensation. Order 37 doesn't cover penalties. So claim the base rate as your main figure and the higher rate only in the alternative, with a reason why it reflects real loss.

Second, compounding. You can compound where the contract says so, or where a statute like the MSMED Act does. If the agreement just says '18 percent per annum', that's simple interest. We see monthly compounding on a simple-interest clause all the time. It gives the defendant an easy point at the leave stage.

Interest has its own limitation clock too. Article 25 of the Limitation Act gives three years for interest that fell due separately, counted from when each interest instalment became due. Old unpaid interest can expire while the principal is still very much alive. Our guide on the limitation period for a summary suit shows how to count those dates.

The 18% line at the bottom of your invoice: is the buyer bound?

Lots of suppliers print 'interest at 18% p.a. will be charged on bills not paid within 30 days' on every invoice. Does that bind the buyer? Only if the buyer agreed to it. A line printed on a document only you prepared isn't automatically part of the contract. Courts have accepted these clauses where the buyer took invoices carrying the term for a long time and never objected. They've rejected them where the buyer's purchase order said something different, or where the clause first turned up after the dispute began. It turns on the facts every time.

What tips it is usually found outside the invoice. A purchase order or vendor registration form that refers to your standard terms. A signed receipt of the invoice with the clause visible. An earlier occasion when the buyer actually paid interest on a late bill. Or an email where the buyer asked you to waive the interest. That last one is often the best of the lot, since it shows the buyer knew interest was payable.

Show Advocate B.K. Singh an invoice interest clause and the first thing he'll ask for is the buyer's purchase order. There's a reason. In a lot of supply relationships it's the buyer's terms, not yours, that were really accepted, and some buyers' terms exclude interest altogether. With a silent PO and only a short history of dealings, keep the printed rate as a fallback. Rest the main interest claim on the Interest Act notice instead or, for a registered MSME, on the MSMED Act. The principal side of the same problem is in our guide on whether you can file a summary suit on invoices alone.

Interest on a bounced cheque or a promissory note

Section 80 of the Negotiable Instruments Act puts interest at 18 percent a year where the instrument names no rate. On a cheque that usually means interest from the day it ought to have been paid, which in practice gets argued as the date of presentation or of dishonour. Courts have applied the 18 percent rate in suits on dishonoured instruments. For the period after filing, the rate is still the court's call under Section 34.

Notes are simpler. A stated rate governs. A demand note with none falls back on Section 80. And Section 3(3) of the Interest Act confirms that it doesn't touch the NI Act's rules on interest and compensation for dishonoured instruments. So a cheque creditor needn't bother with the Interest Act notice route at all.

If you're running a Section 138 case as well, be careful. Any compensation the magistrate gives you gets adjusted in the civil suit on the same matter, under Section 395 of the Bharatiya Nagarik Suraksha Sanhita, 2023 (formerly Section 357 of the Code of Criminal Procedure). Keep a running note of every amount, interim compensation included. Give credit for it in your interest schedule.

No rate was ever agreed: the Interest Act route

With no agreed rate and no negotiable instrument, pre-suit interest depends on Section 3 of the Interest Act, 1978. If the debt was payable at a certain time under a written instrument, interest can run from the due date. Otherwise it runs only from the date given in a written notice saying interest will be claimed. That's why a properly drafted recovery notice says, in plain words, that interest will be claimed from a stated date. Leave that sentence out and months of interest can go.

The rate is the 'current rate of interest', linked to what scheduled banks pay on deposits. It's low. Lower than any business loan. Still worth claiming, especially on a big principal that's been stuck two or three years. And after filing, Section 34 gives the court more room in commercial transactions, so a creditor without an agreed rate isn't held to deposit rates forever.

It's discretionary, too. It sits less comfortably with the summary procedure than contractual or statutory interest. Plead it as a separate head with its own working. If the court won't allow it the summary way, your principal isn't affected.

MSME suppliers: interest the statute gives you

Registered micro and small enterprises are in a strong spot. The MSMED Act hands you interest at three times the RBI bank rate, with monthly compounding, starting the day after the Section 15 deadline passes. It's set by statute. It's a formula. So it fits the 'enactment' limb of Order 37 better than most discretionary claims, and Section 24 of the MSMED Act gives these provisions overriding effect.

You'll need to show three things clearly. That you were registered (these days through Udyam) when you supplied. The date each supply was accepted or deemed accepted. And the calculation. Supplies made before registration are a regular fight, and courts look hard at the registration date. Build the schedule invoice by invoice, using the bank rate in force in each period, and annex the Udyam certificate.

Plenty of MSME suppliers skip the civil court and go to the MSME Facilitation Council under Section 18. The council has its own advantages, including the rule that a buyer challenging the council's award has to deposit 75 percent of the amount first. Which route suits you depends on where the buyer sits, what it owns and how big the claim is. Our comparison of DIAC arbitration and the MSME Facilitation Council sets out the trade-offs.

Interest while the suit runs and after the decree

Interest from filing to decree, and from decree to payment, is for the court to decide under Section 34 CPC. Your prayer clause has to ask for both. You can leave the rate open, but it's better to propose one and say why: the contract rate, the MSMED rate, or the commercial lending rate. In commercial matters Section 34 lets the court go above 6 percent for the period after the decree. Not above the contract rate, where there is one.

Then there's the defendant who simply never turns up. For that case, Order XXXVII Rule 2(3) gives you a decree for the summons amount plus interest 'at the rate specified, if any, up to the date of the decree'. Judges read those words as holding a default decree to whatever rate you'd specified. The Delhi High Court has gone a step further and confined the restriction on post-decree interest to such default decrees; it doesn't reach a defendant who appeared and asked for leave. The practical point is the same. Write the rate, and why, into both the plaint and the summons. Then nobody argues. That stage is covered in detail in our guide on what happens if the defendant does not appear.

Interest doesn't stop at the decree. It runs at the decree rate until you're paid. In execution, you work out interest up to the date of the execution application and claim it with the principal. The executing court can't change the rate. It only applies it.

Pleading interest in an Order 37 plaint, one step at a time

Defendants often go for the interest schedule first. Get it right at the start and most of those attacks fall flat.

1. Pin down the basis for each head

   For every invoice, loan tranche, note or cheque, note whether interest rests on a contract clause, the instrument, the MSMED Act, the Interest Act or the court's discretion. One suit can have different bases for different heads.

2. Fix each start date

   Use the contract due date, the date of the instrument, the day after the MSMED payment deadline, or the date in your interest notice. Every item gets its own.

3. Calculate up to a fixed date

   Work out simple interest to a stated date close to filing, unless compounding is agreed or given by statute. Keep the working in a spreadsheet you can print as an annexure.

4. Credit every payment

   Apply part payments, TDS, credit notes and any compensation from the criminal case in the order the contract says or, if it's silent, in an order you can explain. Arithmetic you can't explain is a gift to the other side.

5. Plead the Order VII Rule 2A details

   Give the basis, rate, start date, end date, total interest and the daily rate after the calculation date. Then repeat the same figures in the prayer clause.

6. Value the suit and pay court fee

   Add pre-suit interest to the principal for valuation and court fee. Leave pendente lite and future interest out of the valuation; they go in the prayer.

7. Match the summons to the plaint

   Check that the summons in the summary form states the amount and rate you're claiming. A default decree follows the summons.

Interest stage by stage: who decides it, how long, what it costs

Papers that prove an interest claim

Where you file, and how interest pushes up the value

Creditors rarely think of this. Interest can change your court. Section 12 of the Commercial Courts Act, 2015 values a money claim at what you're asking for, counting interest calculated to the date of filing. So a principal of Rs 2.6 lakh plus Rs 50,000 of pre-suit interest goes over the Rs 3 lakh specified value. Now it's a commercial suit, and Section 12A mediation and the commercial rules come with it. In Delhi, a claim that goes past Rs 2 crore once interest is added belongs in the Commercial Division of the Delhi High Court, not the district Commercial Court at Saket or Tis Hazari. Check the current pecuniary limit before you file.

It pushes up the court fee as well, because the fee is worked out on the full claim. Another reason not to inflate. Our guide on how a commercial suit is valued when you claim interest and damages runs through valuation with figures. For Delhi, see our note on the court fee for a recovery suit in Delhi.

On territory, you file where the defendant carries on business or where the cause of action arose, such as where payment was due. In Noida, Ghaziabad, Gurugram and Faridabad, it's the court designated as the district's Commercial Court.

Interest, leave to defend and conditional deposits

At the leave stage the court asks whether the defendant has a substantial defence, a plausible one, or nothing, applying the tests the Supreme Court laid down in IDBI Trusteeship v. Hubtown (2016). A defendant with no answer on the principal will often go looking for a triable issue in the interest. Was the invoice clause ever agreed? Is the default rate a penalty? Those are the usual ones.

Courts can split the two, and they often do. If the principal is admitted or plainly due, the defendant may have to deposit it as a condition of leave while the interest dispute goes to trial or is left to Section 34. Order XXXVII Rule 3(5) says that where part of the claim is admitted, leave can't be granted unless that admitted amount is deposited. Sometimes the deposit ordered is the principal alone. Sometimes it's principal plus some interest. What courts weigh is explained in our guide on conditional leave to defend and how much deposit a court can ask.

For a defendant, it's the mirror image. A fair objection to inflated interest can justify limited leave. It almost never shields the principal. Offering early to deposit the undisputed principal often shortens the case, and it cuts the interest that keeps piling up.

How interest claims look for different creditors

• Business lenders. The rate in the loan document usually decides it. Watch default-rate clauses, which invite the penalty argument, and old interest instalments that may already be time-barred.
• Suppliers of goods. The fight is nearly always over whether the buyer accepted the invoice clause. Purchase orders, vendor registration terms and past conduct settle it.
• Service firms and IT vendors. Master service agreements often fix late-payment interest. Read yours for a cap on interest, or a rule that interest only starts after written demand.
• Registered micro and small suppliers. MSMED Act interest is statutory and compounds. You still have to prove registration and acceptance dates, invoice by invoice.
• Cheque holders. Section 80 of the NI Act gives you 18 percent where no rate is written. Credit anything you get from a criminal case.
• Big companies suing small ones. A very high rate claimed against a small trader can look oppressive, and courts cut rates they find excessive. A measured claim usually holds up better.

Interest mistakes that slow a summary suit down

• Compounding with nothing to back it. Unless the contract or a statute provides for compounding, it's simple interest.
• Claiming the default rate as the only rate. Because of the penalty argument, plead the base rate first and the higher rate only as an alternative.
• No interest notice when no rate was agreed. Without a written notice saying interest will be claimed, Interest Act interest may not start until you file.
• Forgetting to give credit. TDS, credit notes, part payments and criminal-case compensation all come off, with dates.
• Rate in the plaint, missing from the summons. A default decree follows the summons. The two have to match.
• Forgetting what interest does to jurisdiction. Pre-suit interest can shift the suit to another court, or take it over the Rs 3 lakh commercial line.

What to do this week

Start with paper. Pull out anything that says a word about interest, from the loan agreement or note and the contract to the PO, the vendor form, the invoices and that old email about late payment. Then match each part of the debt to its basis. If no rate was ever agreed, send a legal notice now saying interest will be claimed from a fixed date. Under the Interest Act, that date matters.

Then build an interest schedule up to a fixed date, invoice by invoice, crediting every payment. Our summary suit page takes you from filing to decree. Once you've got a decree, our guide on executing a summary suit decree covers collecting principal and interest. And if the claim fits Order 37, drafting starts with our Order 37 summary suit service.

If you'd like your loan papers, invoices and interest working checked before you send a notice or file, get in touch with Advocate B.K. Singh's team through the contact page. We can advise on your papers or keep you updated on the law.