HMRC Agent Dedicated Line

How long is the hold on the HMRC Agent Dedicated Line?

Typical hold times are 10 to 45 minutes. Our most recent verified live call held for 39 minutes before an adviser answered.

What is the HMRC Agent Dedicated Line?

The Agent Dedicated Line (ADL) is a separate HMRC telephone service reserved exclusively for registered tax agents and accountants. The number is 0300 200 3311. It handles Self Assessment and PAYE queries for agents acting on behalf of their clients.

The ADL is distinct from the public Self Assessment helpline (0300 200 3310), which is available to taxpayers calling about their own affairs. The public line typically has longer queues; HMRC advises agents never to use it for client matters, and an agent calling the public line may not receive the same level of service.

Who can use the ADL?

The ADL is for UK tax agents registered with HMRC. To use it you must:

• Hold a valid HMRC agent code (Self Assessment agent code or PAYE agent code as appropriate)
• Be authorised to act for the client you are calling about — either via a 64-8 paper form or an online authorisation through the Agent Services Account
• Be calling during line hours: 8am to 6pm, Monday to Friday

Members of the public, bookkeepers acting without an agent code, and payroll bureaus that have not completed agent registration cannot use the ADL.

What happens when you call?

When you dial 0300 200 3311 you reach an automated IVR (interactive voice response) system. It presents a short menu:

1. Press 1 for Self Assessment
2. Press 2 for PAYE and employer queries

After your selection you are placed in a hold queue. You hear hold music and periodic announcements. When a live adviser becomes available, they answer and immediately run a security check.

The security check

The adviser will verify your identity as an agent and your authority to discuss the client. They typically ask for:

• Your agent reference number
• The client's Unique Taxpayer Reference (UTR) or National Insurance number
• The client's date of birth or postcode

Have these to hand before the call. If you cannot pass the security check, HMRC will not discuss the client's affairs.

Practical tips to reduce your wait

• Call at 8am sharp. The queue is shortest in the first 30 minutes after the line opens. Set a reminder, dial at 7:59, and be in the queue before the rush.
• Avoid Mondays. Monday mornings carry the highest call volumes, as queries accumulate over the weekend. Tuesday to Thursday mornings are consistently quieter.
• Avoid post-bank-holiday days. The first working day after a bank holiday sees a surge in calls. If possible, hold non-urgent queries until the day after.
• Have client details ready. Fumbling for a UTR mid-call while on hold wastes time. Prepare a brief — UTR, NI number, date of birth, tax year in question — before you dial.
• Use the ADL, not the public line. If you call 0300 200 3310 by mistake, hang up and redial 0300 200 3311. Wait times on the public line can exceed an hour.

Frequently asked questions

Does HMRC publish live wait times for the ADL?

No. HMRC does not publish real-time or historical queue statistics for the Agent Dedicated Line. The figures on this page come from calls placed by the holdNavigator team and user reports.

Can holdNavigator dial the ADL on my behalf?

Yes. holdNavigator dials 0300 200 3311, navigates the IVR menu, and holds in the queue. When an adviser answers, it calls your phone and connects you. You are connected before the security check so you answer it yourself — we never hear client details or interact with the adviser.

What if HMRC hangs up before answering?

HMRC occasionally terminates calls that have been holding for a long time. If the line disconnects before an adviser answers, the call does not use a holdNavigator credit.

Is the ADL number free to call?

Calls to 0300 numbers cost the same as a call to a standard UK landline. They are included in most mobile and landline call packages. You are not charged by HMRC for the call itself.