Observe · Regulate · Protect — since 2007. 19th OIMAP General Assembly: Singapore, 10–12 June 2026. Programme
Arbitration

Arbitration costs

Registration fee, administrative costs, arbitrators' fees and financial assistance: understanding and estimating the cost of an arbitration at the TAO.

Updated : October 28, 2026· 3 min read

A foreseeable cost

Coronation of the Virgin, Christoffel Jegher (1632–36)
Coronation of the Virgin, Christoffel Jegher (1632–36)

One of the most frequent fears about arbitration is its cost. The TAO publishes a clear scale, sliding with the amount in dispute, and offers funding assistance to parties of modest means.

The costs consist of three elements: the registration fee, the tribunal's administrative costs and the arbitrators' fees. To these are added the parties' own costs: lawyer, experts, travel.

This page presents the scale, worked examples and ways to reduce expenditure.

  • Costs
  • Scale
  • Assistance

Arbitration costs in figures

€1,500Registration fee
€6,800Administrative costs for €100,000
50%Maximum reduction through assistance
30 daysTime limit to pay the advance

Source: Registry of the OIMAP Arbitral Tribunal.

Breakdown

Arbitrators' fees52%
Administrative costs21%
Experts15%
Hearings and translation12%

Average breakdown of costs.

The scale

The registration fee of €1,500 is paid on filing the request and is not refundable. Administrative costs and fees are calculated as a percentage of the amount in dispute, with a rate decreasing by band: for example 6.8% up to €100,000, 3.4% from €100,000 to €1 million, 1.2% beyond.

A special scale applies to the expedited procedure and to mediation. An online simulator gives an instant estimate from the amount and the number of arbitrators.

The Calumny of Apelles, Giorgio Ghisi (1560)
The Calumny of Apelles, Giorgio Ghisi (1560)
Document Box (Ryōshibako) with Chrysanthemum and Plum (lid) (late 1800s-early 1900s)
Document Box (Ryōshibako) with Chrysanthemum and Plum (lid) (late 1800s-early 1900s)
Sketches in Belgium and Germany, Volume I: Hall of Justice of the Magistrates du Franc, Bruges, Louis Haghe (1840)
Sketches in Belgium and Germany, Volume I: Hall of Justice of the Magistrates du Franc, Bruges, Louis Haghe (1840)

Advances and payment

After the tribunal is constituted, the Registry fixes an advance on costs, shared equally between claimant and respondent. If one does not pay, the other may pay its share so that the procedure continues. The sums paid are then allocated in the award.

Payment is made by transfer or card, in euros. For parties established outside the euro zone, conversion is offered at the day's rate.

Final allocation and assistance

The award decides who bears the costs, taking account of the result and the parties' conduct. The losing party in principle bears most, but the tribunal may allocate them differently if equity requires.

Funding assistance is aimed at individuals and small businesses with limited resources. It may cover up to half the tribunal's costs, according to an income scale. The application is examined by the Registry in five days.

Reducing cost without reducing quality

Several choices reduce expense: opting for a sole arbitrator, accepting the expedited procedure, limiting oneself to one exchange of briefs and a short hearing, using videoconferencing, sharing expert costs. Mediation, when successful, costs less than ten percent of a full arbitration.

The parties may also agree on a procedure on documents, without a hearing, if the dispute rests mainly on documents.

Examples of costs

Four examples
Amount in disputeAdministrative costsSole arbitrator's fees
€50,000€3,400€4,100
€100,000€6,800€8,200
€500,000€19,400€23,000
€2,000,000€42,600€54,000

Milestones

  1. €1,500

    Registration fee.

  2. Advance

    After constitution.

  3. Expert costs

    If necessary.

  4. Breakdown

    Decision on costs.

Request assistance before the request

The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)
The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)
The Antechamber of the Palace of Justice, Paris, Charles Meryon (1855)
The Antechamber of the Palace of Justice, Paris, Charles Meryon (1855)
Teapot with Landscape and Imperial Poem, Chen Hanwen (1762–95)
Teapot with Landscape and Imperial Poem, Chen Hanwen (1762–95)

Cost of arbitration and of a trial

The Judgment of Solomon and Esther before Ahasuerus (pair), Dirk Vellert (c. 1530)

TAO arbitration

Cost known in advance
  • Published scale
  • Short duration
  • No appeal by default

Predictable.

Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439)

State trial

Variable cost
  • Low court fees
  • Long procedures
  • Multiple appeals

Often longer.

Estimating your budget

  1. Quantify

    Amount in dispute.

  2. Simulate

    Use the simulator.

  3. Add

    Lawyer and expert.

  4. Apply

    Possible assistance.

  5. Provision

    Plan the cash flow.

Elements of the budget

A collector

The Victory Banquet: from Battle Scenes of the Quelling of Rebellions in the Western Regions, with Imperial Poems (c. 1765–74; poem dated 1760)
« The simulator gave me a precise cost from the outset. No unpleasant surprises: that is what made up my mind. »
Olivier Sauvage, collector

Vocabulary of costs

Advance
Advance on costs.
Scale
Scale of fees.
Funding assistance
Reduction for parties of modest means.
Fees
Remuneration of arbitrators.

Frequently asked questions

Is the fee refunded?

No.

Who finally pays?

According to the award.

How do I obtain assistance?

Via the Desk with the request.

Where do I file?

Useful documents

Contacts

Architectural Conference (c. 1622)
Architectural Conference (c. 1622)
Registry of the Arbitral Tribunal (TAO)Paris — Head Office+33 1 00 00 04 00greffe.tao@oimap.exampleMonday to Friday, 9 a.m. – 5 p.m.

File the request

Fish or Seal Club (X’ús’) (late 1800s–early 1900s)

Start the process.

Online request
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