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

Payment of contributions

Dates, means of payment, reminders and instalment plans: how a State pays its annual contribution before 31 March.

Updated : October 28, 2026· 4 min read

Paying your contribution

Seal Color Box (1662–1722)
Seal Color Box (1662–1722)

Each State's annual contribution falls due before 31 March. Payment may be made by transfer or by direct debit. The contribution notice is sent in January to the focal point and to the ministry responsible for finance, with all the information needed for settlement.

This page describes the calendar, the means of payment and the facilities offered to States experiencing difficulties. The amount due depends on the scale.

Prolonged delay has consequences described on the suspension page.

  • Payment
  • Contributions
  • Calendar

Payment of contributions in figures

31 MarchDeadline
2Means of payment
24 monthsDelay before suspension
48 hAcknowledgement of receipt time (indicative)

Source: Member States Relations Directorate.

Distribution

Bank transfer60% (indicative)
Direct debit40% (indicative)

Indicative share of the means of payment used.

The contribution notice

The notice is issued in January. It specifies the amount due, the scale band, the reference to quote on the payment and the Organization's bank details. It is sent through the member area and by email to the focal point.

If the State has not received its notice by the end of January, it is for the State to inform the Member States Relations Directorate, which resends it without delay.

Portrait of John VIII Palaeologus, Emperor of Constantinople, 1424-1428 (obverse), Pisanello (c. 1438–1439)
Portrait of John VIII Palaeologus, Emperor of Constantinople, 1424-1428 (obverse), Pisanello (c. 1438–1439)
Teapot, Louis Rorimer (c. 1910)
Teapot, Louis Rorimer (c. 1910)
Provincial Coin: Head of Antoninus Pius (obverse); Apollo Sauroktonos (reverse) (138–161 CE)
Provincial Coin: Head of Antoninus Pius (obverse); Apollo Sauroktonos (reverse) (138–161 CE)

Payment by transfer

Transfer is the most common means. It must state the notice reference so that the Secretariat can allocate it without error. Bank charges are borne by the remitting State, so that the sum received matches the amount due.

Payment is deemed made on the date it is credited to the Organization's account. It is therefore prudent to authorize the transfer several days before the deadline.

Payment by direct debit

Direct debit avoids oversights. The State signs a mandate, valid until revoked, authorizing the Organization to collect the sum on a fixed date, before 31 March. It receives advance notice fifteen days before each debit.

The State may revoke its mandate at any time, in writing. Direct debit is appreciated by administrations that wish to simplify their management.

Reminders and instalment plans

If no payment has been received by 31 March, a first reminder is sent in April, then a second in June. They are addressed to the focal point and to the State's financial authority. The reminders are courteous and recall the options available.

A State may request a payment plan in several monthly instalments, without penalty as long as the plan is respected. The plan is validated by the Directorate and recorded in writing.

Payment calendar

A financial year in four dates
DateEventState action
JanuaryContribution noticeCheck the amount
Before 31 MarchDeadlineSettle
AprilFirst reminderRegularize
JuneSecond reminderRequest an instalment plan

Milestones

  1. Notice

    Sent to focal points.

  2. Deadline

    Closing date for payment.

  3. Reminder

    First reminder.

  4. Second reminder

    Last reminder before review of the situation.

Quote the reference

Plaque (1500s–1600s)
Plaque (1500s–1600s)
Medal: Loïe Fuller (obverse), Pierre Roche (1900)
Medal: Loïe Fuller (obverse), Pierre Roche (1900)
Sugar Bowl, Louis Rorimer (c. 1910)
Sugar Bowl, Louis Rorimer (c. 1910)

Single payment or instalment plan

Half Tremissis of Justinian I (527–565)

Single payment

Payment before 31 March
  • Simple
  • No follow-up
  • Ideal if cash flow allows

General case.

Chemin de fer de Toulouse à Bayonne. Pont de l'Aran (en trois arches de 17m d'ouverture chacune). Situation des travaux au 21 juillet 1861, Édouard Baldus (1861)

Payment schedule

Several monthly instalments
  • Prior agreement
  • No penalty if respected
  • Monitored by the Directorate

Case of temporary difficulty.

Paying in five steps

  1. Read

    The contribution notice.

  2. Choose

    Bank transfer or direct debit.

  3. Authorize

    The payment.

  4. State

    The reference.

  5. File

    The acknowledgement of receipt.

Public accountant's checklist

A government accountant

Coin of Kushan King Vasudeva I (c. 142/145+)
« Direct debit took an administrative burden off us. We no longer had to watch the deadline. »
Isabelle Kowalczyk-Dumas, public accountant (example)

Payment vocabulary

Contribution notice
Annual payment request.
Mandate
Direct debit authorization.
Payment schedule
Staggered payment plan.
Allocation
Allocation of a payment.

Receipt and supporting documents

Each payment gives rise to an acknowledgement of receipt sent within forty-eight working hours (indicative time). It certifies the payment and states the financial year concerned. A tax or accounting receipt may be issued on request for the purposes of public accounting.

At the end of the financial year, the focal point receives a statement of its position: contribution due, sums paid and any balance. This statement makes it possible to reconcile entries with those of the Organization.

Frequently Asked Questions

What is the deadline?

31 March.

Can payment be made in instalments?

Yes, on request for a payment schedule.

What happens in case of delay?

Useful Documents

Contacts

The Grotto of Posillipo, Hubert Robert (c. 1769)
The Grotto of Posillipo, Hubert Robert (c. 1769)
Member States Relations DirectorateParis — Headquarters+33 1 00 00 08 00membres@oimap.exampleMonday to Friday, 9 a.m.–5 p.m.

Read the financial report

Beaker (c. late 600s–early 700s)

Revenue, expenditure and audit.

Financial report
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