HM Revenue and Customs
The HM Revenue and Customs International Debt (MARD) department assists with international tax debt enquiries. Services include clarifying debt details, arranging payments, and discussing dispute processes. This line is available Monday to Friday, 08:00-18:00 UK time. Common reasons for calling include understanding debt notices, setting up payment plans, and resolving disputes. Wait times can be long, especially during peak tax season. It is advisable to call early in the morning or use online forms for quicker responses. Ensure you have all necessary documents ready before calling to streamline the process.
Updated 15 Dec 2025
Expected outcomes
- Clarify international tax debts
- Arrange payment plans
- Discuss dispute processes
- Verify residency status
- Provide debt details
Call preparation
Assemble everything before you dial. These requirements are verified by our call analysts and updated as organizations change their scripts.
- HMRC reference number
- Unique Taxpayer Reference
- Personal ID details
- Debt correspondence
- Payment plan options
- Dispute documentation
Known issues
Callers often experience long wait times and difficulty reaching a live agent, especially during peak tax season. To mitigate this, try calling early in the morning or outside peak hours. Alternatively, use online forms for quicker responses. Some users also face confusion over the correct contact channel for international versus domestic debt queries. It is essential to refer to official HMRC guidance to ensure you are contacting the appropriate department based on your residency and debt type. This can help avoid unnecessary delays and ensure your query is handled efficiently.
