Guidance

How to register your client for a tax service as an agent

Find out how to register your client for Self Assessment, Corporation Tax, PAYE, VAT or their trust or estate.

Registering your client for Self Assessment, Corporation Tax or PAYE

If you want to register your client for any of these taxes, you can do so through your HMRC Online Services account.

What you’ll need

You’ll need:

  • your Government Gateway user ID for HMRC Online Services
  • a Self Assessment or Corporation Tax agent code (even if you’re registering for PAYE)

How to register

  1. Sign into your HMRC Online Services account using your Government Gateway user ID.

  2. Select ‘Register for HMRC taxes’ in the left-hand menu.

  3. Select ‘Register for HMRC taxes’ on the right.

  4. Select the first option ‘I want to tell HMRC that my client is in business and needs to register for a new tax or tell HMRC that the company is now active’.

  5. Read the guidance on the following screens and select ‘Next’.

  6. Select the tick box for the tax you want to register for and enter your client’s name or a client reference.

  7. Follow the instructioninstructions on screen and submit.

How to register your client for Self Assessment if you cannot use the online service

You can also use the online form CWF1 or the paper version of form CWF1 to register your client for Self Assessment and National Insurance Contributions.contributions. You’ll need your client’s National Insurance number.

If your client is self-employed

If you want to register:

If your client is not self-employed

If you want to register a client that is not self-employed or a director, use form SA1.

Registering your client’s trust or estate

If you want to register your client’s trust or estate, you can do so through your agent services account.

You can also find out more about how to register your client’s trust online and how to register your client’s estate online.

What you’ll need

You’ll need your Government Gateway user ID for agent services account.

How to register

  1. Sign into your agent services account using your Government Gateway user ID.

  2. Go to ‘Trusts and estates’.

  3. Select either ‘registered the trust’ or ‘estate’.

  4. Follow the instructions on screen.

Registering your client for VAT

To register a client for VAT, you must have either a Government Gateway user ID and password for:for either:

  • agent services account
  • HMRC Online Services

How

If toyou register for VAT using your agentGovernment servicesGateway account

IfID for HMRC Online Services, you registermay be asked for VATdetails usingto theverify Governmentyour Gatewayown useridentity, IDsuch youas:

  • your haveNational forInsurance agentnumber
  • date servicesof account,birth
  • passport youor driving licence

You will not be asked to provide anythis personalinformation details.using your Government Gateway user ID for your agent services account.

What you’ll need

You’ll need your:need:

  • your Government Gateway user ID and password for either agent services account or HMRC Online services
  • your name
  • your phone number
  • your email address
  • your client’s name
  • your client’s date of birth
  • details of client’s turnover and nature of business
  • your client’s bank account details (if available)
  • your client’s National Insurance number
  • a form of ID from your client,client such(such as their passport or driving licencelicence)

How to register

  1. Register your clientclient’s byCorporation signingTax inPayments, withPAYE, yourSelf-Assessment GovernmentReturn, Gatewayrecent IDpayslip foror agentP60 service(whichever account.

    is most appropriate)
  2. OnIf theyou’re screenregistering ‘Whosea businesslimited docompany youclient, wantthey tomust register?’have selecta ‘SomeoneCompany else’s’Registration (unlessNumber you’reand registeringa yourCorporation ownTax agency).

  3. FollowUnique Taxpayer Reference (UTR) to complete the instructionsVAT onregistration screen.process.

How

Individuals toand registerpartnerships usingdo yournot HMRCneed Onlineto Serviceshave account

Ifa youSelf chooseAssessment UTR to register for VATVAT, usingbut yourif Governmentthey Gatewaydo, IDyou formust HMRCsupply Onlinethis. Services,You’ll you may also be asked to provideverify personalthe detailsentity soyou thatare HMRCregistering, cantherefore verifyshould yourknow identity,some includingof your:

  • datethe history of birth
  • passportthe details

Whatbusiness you’llor need

You’llperson needyou’re your:registering.

  • Government Gateway ID for HMRC Online Services
  • name
  • phone number
  • email address
  • National Insurance number
  • date of birth
  • passport or driving licence

How to register

  1. Register your client by signing in with your Government Gateway ID for either agent services account or HMRC Online Services.services.

  2. On the screen ‘Whose business do you want to register?’ select ‘Someone else’s’ (unless you’re registering your own agency).

  3. Follow the instructions on screen.

Published 6 October 2022
Last updated 25 November 2022 + show all updates
  1. Page updated with information on what you'll need when registering your client for VAT, including registering limited company clients and individuals and partnerships.

  2. First published.