DIAC Arbitration or Commercial Court Suit for Unpaid Dues?

The short answer first

If your contract has a valid arbitration clause naming DIAC, you're going to arbitration. The other side can make the court send your suit there under Section 8 of the Arbitration and Conciliation Act, 1996. If there's no clause, the route is a commercial suit, unless both of you agree in writing to go to DIAC after the dispute has started. So the first question isn't which forum is better. It's what your contract says.

Sometimes you really can pick. Then weigh it like this. DIAC asks for money early: your share of the arbitrators' fees plus the Centre's administrative charge. In return you get a timeline fixed by statute, and an award that's hard to upset. A suit asks only for a court fee, and the CPC with its strict commercial deadlines governs it. You can use the summary suit procedure if the debt is clear. You can also join people who never signed any arbitration clause. The catch? Whoever loses gets a full first appeal.

Two definitions, briefly. DIAC is the Delhi International Arbitration Centre. The Delhi High Court set it up, and since 2009 it has worked from inside the High Court complex in New Delhi. A Commercial Court is a court notified under the Commercial Courts Act, 2015 to hear commercial disputes worth Rs 3 lakh or more. Win in either place and you get an order you can execute against the debtor's bank accounts and property.

DIAC and a commercial suit, side by side

My contract has an arbitration clause. Can I still sue?

Yes, you can file. But the defendant can get it sent to arbitration. Section 8 says the court must refer the parties if the defendant asks in time, which means no later than its first statement on the substance of the dispute, and attaches the original agreement or a certified copy. The court can refuse only if it sees, prima facie, that there's no valid arbitration agreement. So in a commercial suit, expect the Section 8 application before or with the written statement. In a summary suit it comes with the leave to defend application, or earlier.

Suppose the defendant doesn't apply in time and files a written statement on the merits. It's then treated as having given up the clause, and the suit carries on. Some defendants do this on purpose. They'd rather be in court. Others just miss it. Either way, if you sue despite a clause, you're betting the defendant won't object. Lose that bet and the months spent on mediation and filing are gone. Don't count on getting the court fee back either.

And the clause has to be a real arbitration agreement. Wording like "disputes may be referred to arbitration if both parties agree", or a clause that leaves the choice to future talks, may bind nobody. A clause letting one side appoint the sole arbitrator isn't void as a whole. But that appointment power can't be used that way after Perkins Eastman (2019) and the Constitution Bench in CORE v. ECI-SPIC-SMO-MCML (2024), and the court or DIAC appoints instead. If you're unsure about yours, our guide on the DIAC arbitration clause shows how to read it.

No clause at all. Can you still use DIAC?

Yes, if the other side agrees in writing. An arbitration agreement can be made after the dispute starts, and under Section 7 an exchange of emails or letters is enough. Realistically, though, a debtor who's dodging payment won't agree to much. This works mostly between businesses that want a quick, private decision on an honest disagreement, like a measurement dispute or a quality claim.

Without that agreement, it's court. A commercial suit for recovery begins with Section 12A pre-institution mediation through the Legal Services Authority, unless you're asking for urgent interim relief. After that it goes to the Commercial Court that has jurisdiction over the value and the territory. Fairly simple.

When the other side files first

Say your customer starts a DIAC arbitration before you do, claiming damages for late delivery. Your unpaid price usually belongs in that same arbitration as a counter claim, as long as it comes out of the same contract and is within limitation. File a separate suit for the price and you're inviting a Section 8 application, with one dispute split across two forums. Keep in mind that DIAC assesses fees on claim and counter claim together. Your counter claim adds to the deposit. Budget for it before filing.

Flip it round. A Commercial Court summons reaches you, on a contract that sends disputes to DIAC. If you want arbitration, the Section 8 application goes in before or along with your written statement, and you say nothing on the merits until it's filed. If you're content to stay in court, just defend, and the clause is treated as waived for this dispute. Whichever you pick, the 120-day outer limit for the written statement is running. Make the call in the first few weeks. Leaving it to the last hearing is how defendants lose options.

Which one gets you paid faster

If the debt is clear and the defence is weak, a summary suit usually wins on speed. Order XXXVII gives the defendant 10 days to enter appearance. Once you serve the summons for judgment, it has another 10 days to ask for leave to defend. If leave is refused, or granted on a deposit it can't put up, you get a decree with no trial at all. Nothing like that exists in arbitration. A respondent there defends as of right. However thin its case, the tribunal must hear it out. Our guide on summary suit vs regular suit explains when Order XXXVII fits.

A genuinely disputed claim is different. There, DIAC usually moves quicker than a contested commercial suit. Pleadings must close within six months of the tribunal's appointment (Section 23(4)), and the award is due within 12 months after that (Section 29A). That can be extended by six months by consent, and after that only by the court. A contested commercial suit in Delhi goes through the written statement, admission and denial of documents, a case management hearing, evidence and arguments, and at the trial stage that commonly takes two to four years. These are typical ranges. They aren't promises. Our guide on DIAC arbitration time limits shows how the Section 29A clock runs.

After the decision, the two routes look more alike. Against an award, the Section 34 window is three months, with up to 30 days more. Courts generally stay an award only if money is deposited. Against a decree, the first appeal must be filed within 60 days, and a stay there usually needs a deposit too. Executing either one is roughly the same amount of work.

Choosing a route, one step at a time

1. Find the dispute clause

   It may be in the agreement, the purchase order terms, the invoice terms or some general conditions nobody read. Note whether it names DIAC or an ad hoc arbitrator, whether it fixes a seat, and who appoints. Then check whether the invoice terms and the main agreement say different things. They often do.

2. See whether it covers your claim

   Some clauses leave out money claims. Others apply only to technical disputes, or allow court proceedings for recovery. Read the exact words, because a carve-out can open the door to court.

3. List everyone you need to bind

   Maybe your claim is also against a guarantor, a director who gave a personal undertaking, or a group company that took the goods. Check whether each one signed the arbitration clause. Those who didn't can usually be reached only through a suit.

4. Test your paperwork

   A fixed sum on signed invoices, an acknowledgment or a bounced cheque points to a summary suit, if there's no clause. Damages, delay or quality disputes point to a forum that'll hear evidence anyway. That's where DIAC's timeline helps.

5. Weigh cost against value

   Put the court fee for your claim beside the likely DIAC deposit on your claim plus any counter claim. On small claims the arbitration fee can be out of all proportion. On big ones, the court fee can be the larger number.

6. Check limitation and urgency

   If limitation is close, the quickest thing that stops time is a notice invoking arbitration (for DIAC), or filing the suit after mediation. If assets might vanish, get interim protection first. That holds on either route.

Time and money, stage by stage

What each route really costs

In a commercial suit, the big fixed cost is the court fee. In Delhi, Uttar Pradesh and Haryana it's ad valorem, so it goes up with the amount you claim, under each state's own schedule. Our guide on the court fee for a recovery suit in Delhi shows how it's worked out. Pre-institution mediation through the Legal Services Authority costs a modest fee. After that, you're mostly paying for your lawyer's appearances and the days your staff and witnesses lose.

DIAC's bill has three parts. There's a filing charge, an administrative cost, and a deposit towards what the arbitrators will be paid. Each grows with the amount in dispute. Rule 3 of the DIAC (Administrative Costs and Arbitrators' Fees) Rules, 2018 ties them to published schedules, worked out on claim and counter claim added together, and usually each side pays half. Respondents sometimes refuse. When that happens, the Centre can split the assessment so each side funds its own claim, and the Delhi High Court approved this in Samsung India Electronics v. DIAC (March 2026). Our guide on DIAC arbitration fees explains the deposit in detail.

Frankly, on a claim of a few lakh, DIAC's fee can swallow a large share of what you recover. A suit, a legal notice or the MSME Council (for registered micro and small suppliers) may make more sense. Big claims flip the picture. There, the court fee plus years of a contested suit can cost more than a well-run arbitration. Both forums can order the loser to pay costs. Collecting them is another matter.

Freezing assets in a hurry: Section 9, Section 17 and Order XXXVIII

Both routes can freeze assets. They just use different doors. In a suit you ask the Commercial Court for attachment before judgment under Order XXXVIII Rule 5, or an injunction under Order XXXIX, usually in the plaint itself. Asking for urgent interim relief also lets you skip Section 12A mediation.

Arbitration gives you more than one door. Before any tribunal exists, a court can act under Section 9, though you then have 90 days from its order to get the arbitration going. DIAC also has emergency arbitrators. Rule 14 of the 2023 Rules lets you apply to one for an order within 14 days. Once the tribunal is in place, Section 17 lets you ask it directly, and what it orders can be enforced as if a court had ordered it. Our guide on interim relief in a DIAC arbitration explains which forum to approach when. We often go to court under Section 9 for the first freeze. It tends to be quicker. The tribunal then takes it from there.

Which courtroom: Delhi, Noida, Ghaziabad or Gurugram

Two things fix the court for a suit: the value of the claim and the place. In Delhi, anything up to Rs 2 crore is heard by a District Judge (Commercial Court). The district is the one where the defendant lives or does business, or where the cause of action arose. Depending on the facts, that could mean Saket, Tis Hazari, Karkardooma, Rohini, Dwarka or Patiala House. Above Rs 2 crore, you file in the Delhi High Court's Commercial Division. Check the limit at the time you file, because raising it has been under consideration for a while. Outside Delhi it's simpler. Ghaziabad, Gautam Buddh Nagar, Gurugram and Faridabad each have a designated Commercial Court for the district. Our page on which commercial court hears your case sets it out.

Arbitration doesn't care where you're based. Hearings happen at the Centre in New Delhi or on video. The seat is normally New Delhi, and that decides which court supervises. Any Section 9 or Section 34 petition goes to a Delhi court, with Section 10 of the Commercial Courts Act doing the sorting: claims above Rs 2 crore to the High Court's Commercial Division, smaller ones to the district Commercial Court. A Section 37 appeal lands before the Commercial Appellate Division. Noida clients are often surprised by this. If your company is in a DIAC arbitration, everything connected with it runs through Delhi. Surajpur doesn't come into it.

Challenging the result: Section 34 or a full appeal

Legally, this is where the two differ most. Lose a commercial suit and you can appeal on facts and law, within 60 days, under Section 13 of the Commercial Courts Act. The appeal court is free to weigh the evidence again. An award gets no such second look. Section 34 lets a court set it aside only for listed reasons: a party's incapacity, an invalid arbitration agreement, no proper notice, the tribunal deciding things outside the reference, a tribunal formed the wrong way, a dispute that can't be arbitrated, conflict with public policy and, in domestic awards, patent illegality on the face of the award. Re-examining the merits is off limits (Ssangyong Engineering v. NHAI, 2019).

Since Gayatri Balasamy v. ISG Novasoft (Constitution Bench, 2025), courts have a limited power to modify an award. They can sever an invalid part, for instance, or correct post-award interest. They still can't re-decide the case. If you hold a sound award, that narrow window is a real advantage. If you fear a wrong finding on facts, it's a real risk. Our guide on challenging a DIAC award covers the grounds and the time limit.

Papers that decide the route

• The signed agreement, every annexure, and whatever general terms and conditions it refers to
• Purchase orders and invoice terms. These sometimes carry a dispute clause of their own
• Any email or letter, sent after the dispute began, agreeing to arbitration or a change of forum
• Guarantees, undertakings and letters of comfort, and the names of whoever signed them
• Invoices, proof of delivery or completion, and the ledger
• Any acknowledgment of the debt or part payment, with its date, because limitation turns on these
• Bounced cheques and the bank's return memos, if you have them
• Earlier notices and replies, and any notice invoking arbitration you've already sent
• A board resolution or authority letter for whoever will sign the pleadings and the statement of truth
• A certificate under Section 63 of the Bharatiya Sakshya Adhiniyam for emails and other electronic records

Suppliers, service firms, lenders and startups don't face the same choice

Goods suppliers working off purchase orders rarely negotiate a clause. At most there's small print on the back of the buyer's PO. Small print still binds if it's valid. If the supplier is a registered micro or small enterprise, there's a third forum, the MSME Facilitation Council under Section 18 of the MSMED Act, and it overrides private clauses. Our guide on DIAC vs the MSME Council puts them side by side. Service and IT firms are different. They usually sign negotiated agreements with DIAC or ad hoc clauses, and they fight over scope and sign-off. For that sort of dispute, an arbitrator who'll sit through technical evidence is useful.

Lenders are a mixed case. An inter-corporate deposit or trade advance usually comes with a loan agreement that has an arbitration clause, and a cheque or guarantee that doesn't. You can arbitrate against the borrower and, at the same time, file a summary suit on the cheque or the guarantee. For startups and small firms, cost decides a lot. Half of DIAC's fee on a modest claim, swollen by a counter claim, can hurt cash flow. Big companies lean towards arbitration because it's private. Section 42A keeps the proceedings confidential. No public judgment ends up naming their client.

When Advocate B.K. Singh is asked to pick between the two routes, he usually opens with one question. Apart from the contracting company, who can actually pay? If the money sits with a guarantor or a group company outside the clause, court has to be part of the plan.

Mistakes we keep seeing

• Filing a summary suit and hoping the clause won't matter. The defendant applies under Section 8, the suit goes off to arbitration, and months of mediation and pleading are wasted.
• Arguing the merits before raising the clause. File your written statement without a Section 8 application and you've usually lost the right to arbitrate.
• Dragging non-signatories into arbitration. Guarantors and directors are usually outside the clause, and an award against them is open to challenge.
• Fighting about the forum while limitation runs out. A notice invoking arbitration under Section 21 stops limitation for the arbitration. A suit has to be filed, after mediation, within time.
• Budgeting too little for DIAC. Fees are assessed on claim plus counter claim and paid in advance. If the respondent won't pay its half, you can end up paying both.
• Picking arbitration to avoid an appeal, then losing. The narrow Section 34 review protects bad awards just as firmly as good ones.

What to do this week

Get the agreement out and find the dispute clause. If it clearly names DIAC or arbitration and covers money claims, prepare a notice invoking arbitration and set money aside for the DIAC deposit. If there's no clause, or a muddled one, and your paperwork is strong, get ready for Section 12A mediation and a summary or regular suit. If someone outside the clause is liable too, plan for both. In this choice, your papers decide more than your preference does.

Check limitation on the oldest invoice. If assets might disappear, decide this week whether you need a Section 9 order or attachment before judgment. Our DIAC arbitration lawyer page explains how we handle DIAC claims and defences.

If you'd like your contract and invoices read before you pick between DIAC and the Commercial Court, send them to Advocate B.K. Singh's team through the contact page.