International arbitration is frequently described as a faster, more efficient alternative to cross-border litigation. That characterization is often accurate — but efficiency has a price. A contested ICC arbitration involving a three-arbitrator panel, a moderately complex dispute, and experienced international counsel on both sides can cost several hundred thousand dollars in arbitration fees and institutional charges before a single lawyer's invoice is paid. Understanding how those costs are structured, how they are allocated between the parties, and how to manage them strategically is essential for any party considering international arbitration.

The Two Categories of Arbitration Costs

Costs in international arbitration fall into two distinct categories, and the distinction matters for how they are treated at the award stage.

Costs of the arbitration — sometimes called "arbitration costs" or "tribunal costs" — include the arbitrators' fees and expenses, the institution's administrative fees, the costs of the hearing venue, and the fees of any tribunal-appointed experts or assistants. These costs are determined by the institution and paid by the parties to the institution, which then disburses the funds to the arbitrators as the proceeding progresses.

Party costs — sometimes called "legal costs" or "costs of representation" — include counsel fees, expert witness fees, fact witness costs, translation and interpretation services, document management costs, and travel. These costs are incurred by each party directly and are documented for potential cost-shifting purposes at the award stage.

The critical difference from U.S. domestic litigation is that in international arbitration, both categories of cost can be shifted to the losing party. Under the American Rule that governs U.S. federal litigation, each party pays its own attorneys' fees regardless of outcome, absent a fee-shifting statute or contractual provision. International arbitration tribunals are not bound by the American Rule. Most institutional rules expressly authorize tribunals to allocate all costs of the arbitration — both tribunal costs and party costs — as part of the final award.

How Institutional Fees Work

Each major institution calculates fees differently, and the differences are meaningful enough to factor into the choice of institutional rules when drafting an arbitration clause.

ICC uses a sliding-scale fee structure based on the amount in dispute. Administrative fees range from approximately 0.35% of the claim value for large disputes to 2.35% for smaller ones, subject to minimum and maximum caps set in the ICC's cost schedule. Arbitrator fees are calculated from the same scale, with the ICC Court setting a range within which the arbitrators' fees fall based on the complexity and duration of the proceedings. The ICC requires both parties to pay an equal advance on costs at the outset — if either party fails to pay its share, the other party may pay the full advance to keep the proceedings going, a strategic dynamic that can be important when a respondent is financially distressed or wishes to obstruct the proceeding through non-payment. The final allocation of costs is determined in the award.

ICDR charges a filing fee based on the amount in dispute, plus a case service fee. Arbitrators under ICDR proceedings are typically compensated at an agreed daily or hourly rate rather than on a percentage-of-claim basis. For complex international disputes, experienced ICDR arbitrators commonly charge between $300 and $500 per hour, with presiding arbitrators in large commercial matters sometimes billing higher. The ICDR's flexibility in arbitrator compensation — particularly its use of hourly rather than percentage-based fees — can make it more cost-efficient for very large disputes where percentage-based fees would produce arbitrator compensation disproportionate to the actual work involved.

JAMS International uses a similar structure, with filing fees and arbitrator compensation at hourly rates. JAMS arbitrators are frequently experienced U.S. commercial litigators and retired federal or state court judges, and their hourly rates reflect the U.S. market for senior legal talent. For U.S.-Latin America disputes where both parties want experienced adjudicators familiar with U.S. legal concepts, JAMS proceedings can offer a practical compromise between full international procedures and the U.S. litigation norms the parties are more accustomed to.

The Loser-Pays Principle in International Arbitration

The default rule in international commercial arbitration is that costs follow the event — meaning that the losing party pays the winning party's reasonable costs. This principle, which operates as the baseline in most civil law jurisdictions and in English court proceedings, stands in sharp contrast to the American Rule governing U.S. federal litigation.

Under ICC Rules Article 38, the final award shall fix the costs of the arbitration and decide which of the parties shall bear them or in what proportion they shall be borne. The ICDR Rules contain similar language. Neither set of rules mandates a strict loser-pays outcome — tribunals have broad discretion to apportion costs based on the outcome and the conduct of the parties — but the general expectation among experienced practitioners is that a party that prevails on the merits will recover a meaningful share of its costs, including counsel fees, from the losing party.

For U.S.-based parties entering international arbitration for the first time, this principle has significant strategic implications. A respondent who loses not only faces an adverse award on the merits but may also face an award requiring it to reimburse the claimant's legal fees and arbitration costs. Conversely, a claimant pursuing a weak claim faces the risk of paying the respondent's costs if the claim fails. The loser-pays principle changes the economics of dispute resolution in ways that are both a risk to manage and a tool to deploy.

Cost Shifting Decisions: What Tribunals Consider

While the loser-pays principle provides the general framework, tribunals exercise genuine discretion in allocating costs, and the outcome of that allocation is not always predictable. In deciding how to apportion costs, tribunals typically consider:

The overall outcome. Which party prevailed on the most significant claims? A party that wins on liability but recovers substantially less in damages than it claimed may not receive a full cost award. A party that prevails on all contested issues is in a stronger position to recover all costs.

Reasonableness and proportionality of the prevailing party's costs. A winning party that spent $2 million in legal fees on a $3 million dispute may find the tribunal unwilling to award the full amount. Tribunals evaluate whether the costs incurred were proportionate to the stakes and whether the legal strategy was reasonably calibrated to the complexity of the issues.

Conduct of the parties during the proceedings. A party that engaged in obstructive document production tactics, raised meritless procedural objections, or otherwise unreasonably prolonged the proceedings may face a cost penalty even if it prevailed on the merits. Tribunals have increasingly used cost awards to sanction procedural bad faith, and the threat of a cost consequence is a meaningful deterrent against dilatory tactics.

Selective success on claims and defenses. When a claimant prevails on some claims but not others, or a respondent succeeds on some defenses but not all, the tribunal may apportion costs to reflect the partial outcome. A claimant who brought five claims and won two may receive a partial cost award proportionate to its degree of success.

Settlement posture. Some institutional rules and IBA Rules commentary suggest that a party's unreasonable refusal to settle — particularly when its final position is less favorable than a rejected settlement offer — may factor into the cost analysis. Tribunals are not uniformly receptive to this argument, but it is relevant in jurisdictions and under rules where the concept of a sealed settlement offer analogous to a Calderbank offer is recognized.

Security for Costs

A procedural tool that receives insufficient attention from U.S.-based parties is the application for security for costs. When a respondent has reason to believe that a claimant will be unable to satisfy an adverse cost award — or that any such award would be difficult to enforce against the claimant's assets — it may apply to the tribunal for an order requiring the claimant to post security as a condition of continuing the proceeding.

Grounds for security for costs include: evidence that the claimant lacks sufficient assets to cover a potential cost award; the location of the claimant's assets in a jurisdiction where enforcement would be practically difficult or legally uncertain; a demonstrated pattern of asset dissipation or corporate restructuring designed to limit enforcement risk; or a strong prima facie showing that the claim is brought primarily to apply commercial pressure rather than to vindicate legitimate rights.

The threshold for obtaining security for costs is high. Tribunals are reluctant to condition a claimant's access to arbitration on the ability to post a bond — doing so risks denying legitimate claimants their contractual right to have a dispute heard. But in cases involving claimants of uncertain financial standing, offshore-registered special purpose vehicles without discernible assets, or circumstances suggesting the claim is brought for strategic rather than remedial purposes, a well-documented application for security for costs can be a valuable defensive tool. At minimum, it puts the claimant's financial position on the record and creates a factual foundation that can inform the tribunal's later cost allocation decision.

Managing Arbitration Costs as a Party

International arbitration, while potentially more efficient than multi-jurisdictional litigation, is genuinely expensive. A three-arbitrator ICC panel resolving a $10 million commercial dispute — a medium-sized matter by international arbitration standards — can generate $500,000 to $1 million in arbitrator and institutional fees alone, before counsel fees, expert costs, and hearing expenses are counted. A realistic cost budget for a fully contested ICC arbitration of that size often exceeds $2 million in total expenditure on the winning side.

That reality requires deliberate cost management from the moment a dispute arises. Several approaches are worth considering:

Institutional rule selection matters. When drafting an arbitration clause, the choice between ICC percentage-based fees and ICDR or JAMS hourly-rate structures can have a material effect on total costs for large disputes. For a $50 million dispute, ICC arbitrator fees calculated on the percentage scale can exceed those of an ICDR panel billing at market hourly rates for the same proceeding. Counsel drafting clauses for high-value contracts should model the cost implications of each institutional option.

Scope management in the proceedings. The number of issues in dispute, the volume of documentary evidence, and the number of hearing days are the primary drivers of cost once a proceeding is underway. Parties that invest in defining and narrowing the issues at the outset — through focused statements of claim and answer, targeted document requests calibrated to the IBA Rules standards, and disciplined selection of expert witnesses — consistently spend less than parties that approach the proceeding as if it were full-scale U.S.-style litigation.

Procedural tools used efficiently. Jurisdictional objections, bifurcation of liability and damages, and early dispositive motions can all reduce costs if deployed at the right stage. A successful preliminary objection to jurisdiction terminates the proceeding before the merits phase begins. Bifurcation allows a party to test the strength of its liability case before incurring the cost of a full damages expert. Early agreement on which issues are truly disputed versus which can be resolved by stipulation reduces unnecessary hearing time.

Building cost arguments into the relief requested. Parties who intend to seek cost shifting should document their costs throughout the proceeding, submit a detailed cost summary to the tribunal at the appropriate procedural stage, and affirmatively argue — not merely request — that the standard for cost recovery is met. Tribunals award costs to parties that make the case for them; parties that submit a bare cost schedule without argument may receive less than they could have.

International arbitration is worth its cost when the alternative — litigating a cross-border commercial dispute through the court systems of multiple jurisdictions — is considered. But cost discipline from the outset, informed by a clear understanding of how institutional fees and cost-shifting rules operate, is what separates parties that control the economics of their arbitrations from those that are controlled by them.