In nearly every recovery suit in Delhi's commercial and civil courts, the principal is only part of the money actually in dispute; years of interest ride on how three questions are answered. What interest ran before the suit was filed? What runs while it is pending? And what runs from decree until payment? Each period has its own legal source — the parties' contract, the Interest Act, 1978, and Section 34 of the Code of Civil Procedure — and pleading them imprecisely is one of the commonest, costliest drafting lapses in money claims.
The three periods mapped
| Period | Governing source | Working rule |
|---|---|---|
| Pre-suit (accrual to filing) | Contract; statute (e.g. MSMED Act); mercantile usage; Interest Act, 1978 on written notice | Claimable as of right under contract/statute; otherwise discretionary under the Interest Act from the date of the demand notice claiming interest |
| Pendente lite (filing to decree) | Section 34(1) CPC — court\'s discretion | Reasonable rate on the principal sum adjudged; contract rate persuasive, penal rates moderated |
| Future (decree to payment) | Section 34(1) CPC with its proviso | Up to 6% p.a.; for commercial transactions, up to the contractual rate or prevailing bank lending rates |
Pre-suit interest: build it or lose it
The strongest pre-suit claim is contractual: a clause fixing rate, rests and the event of default. Invoices bearing an interest stipulation, course-of-dealing acceptance, and trade-association terms can each supply the obligation in the absence of a signed clause, though each invites contest. Statute does the work for eligible MSME suppliers — compound interest at three times the bank rate under Section 16 MSMED Act, which overrides contrary terms. Where none of these exists, the Interest Act, 1978 is the fallback, and its discipline is procedural: a written demand for payment giving notice that interest will be claimed, from which date the court may award simple interest at prevailing rates. The practical rule for creditors is unglamorous — send the interest-bearing demand early, and plead its date in the plaint.
Pendente lite and the conduct premium
Between filing and decree, interest is the court\'s tool as much as the creditor\'s right. Courts calibrate the rate to the transaction\'s character — commercial borrowings near lending rates, personal dealings lower — and to conduct: a defendant who prolonged trial on defences the record contradicted may face the fuller rate, while a plaintiff who inflated the claim or delayed proceedings may see moderation. In commercial suits, the costs regime under Section 35 CPC reinforces the same signals. Compound interest pendente lite is exceptional and needs a clear contractual or statutory basis; courts ordinarily decree simple interest on the principal adjudged.
Future interest and the commercial-transaction gateway
Section 34\'s proviso is the piece most often overlooked in drafting. The six per cent ceiling on post-decree interest gives way, for liabilities arising out of commercial transactions, to the contractual rate or bank commercial lending rates. "Commercial transaction" — one connected with industry, trade or business of the party incurring the liability — should be pleaded in terms, with the facts that make it so. A decree that is silent on future interest still carries a statutory default in execution, but a well-drafted prayer removes the argument entirely.
- Plead each period separately, with rate, basis and computation; annex an interest schedule to the plaint.
- Quantify interest to the date of filing for court-fee and jurisdiction purposes; claims "with interest as the court deems fit" surrender value.
- Send the Interest Act notice where no contract clause exists — before filing, not in the plaint\'s prayer.
- For MSME suppliers, invoke Sections 15–17 MSMED Act expressly; the statutory rate dwarfs ordinary awards.
- In execution, calculate to the date of deposit and claim appropriation first towards interest and costs, then principal, as the law of appropriation allows.
Interest is where recovery litigation\'s economics are actually decided: on a five-year dispute, the difference between six and fourteen per cent, simple and compounded, can exceed the principal. It deserves the same drafting attention as liability — at the first notice, not the last hearing.
Frequently Asked Questions
Can I claim interest if the contract says nothing about it?
Yes, through two routes. The Interest Act, 1978 allows the court to award interest from the date the debt became payable if a written demand for payment with notice of interest was made; and mercantile usage or statute (such as the MSMED Act for eligible suppliers) can supply a rate. Absent all of these, pre-suit interest is vulnerable, which is why the demand notice claiming interest matters so much.
What is the ceiling on future interest under Section 34 CPC?
Section 34 caps further interest — from decree to payment — at six per cent per annum for ordinary claims, but where the liability arises out of a commercial transaction, the rate may go up to the contractual rate, or where there is none, the rate at which moneys are lent by nationalised banks for commercial purposes. The commercial character of the transaction must therefore be pleaded and shown.
Is the court bound by the contractual rate for the pendente lite period?
No. Interest pendente lite is discretionary: the court "may" order interest at a rate it deems reasonable on the principal from the date of the suit to the decree. Contract rates are a strong guide, particularly in commercial transactions, but courts moderate penal or compounding rates and reflect litigation conduct in the award.
How is interest claimed in a commercial suit specifically?
The Commercial Courts Act regime expects precision: the plaint should quantify principal and interest separately up to filing, state the basis (contract clause, statute, usage, or the Interest Act notice), the rate, rests, and the period, and then pray for pendente lite and future interest. Under Section 35 CPC as applied to commercial disputes, costs — which include interest realities — follow conduct as well as the event.