How to Contact HMRC About Stamp Duty Land Tax
Complete contact directory for SDLT enquiries: phone numbers, postal addresses, and online services. Find the right channel for your situation.
Source: gov.uk/find-hmrc-contacts/stamp-duty-land-tax-general-enquiries - last verified 2026-04-14
In this article
When You Might Need to Contact HMRC About SDLT
Most buyers complete their stamp duty obligations entirely through a solicitor or conveyancer, who handles the SDLT1 return and payment on their behalf. Direct contact with HMRC is less common but sometimes necessary.
Common reasons to contact HMRC's SDLT team directly include:
- Disputing a penalty for late filing or late payment
- Amending a submitted return after discovering an error (you have 12 months from the filing date)
- Applying for a higher-rate refund after selling a previous main residence
- Ordering paper forms such as SDLT1, SDLT2, SDLT3, or SDLT4
- Chasing a certificate (SDLT5) needed to register with HM Land Registry
- General enquiries about how SDLT applies to an unusual transaction
HMRC cannot give legal advice on whether SDLT applies to a specific transaction. For complex or unusual situations, consult a solicitor or chartered tax adviser.
Phone Contact
The SDLT helpline is the fastest route for most enquiries. Have your Unique Transaction Reference Number (UTRN) ready before you call.
0300 200 3510
Calls to 0300 numbers are charged at the same rate as 01 and 02 numbers. Included in most mobile and landline tariff bundles.
+44 1726 209 042
International rates apply. Use this number if you are abroad at the time of your enquiry.
Opening hours
Monday to Friday, 8:30am to 5pm
Closed on bank holidays. Calls outside these hours will not be answered.
Security questions on the phone
HMRC will ask security questions before discussing your tax affairs. These questions are based on personal details held in your HMRC account. You will need:
- Your National Insurance number
- Full name and date of birth
- Current address and postcode
- The UTRN for the transaction you are enquiring about (11 characters: 9 numbers plus 2 letters, for example 123456789MC)
If your personal details in HMRC's systems are out of date, you may be unable to pass security. Update them via your personal tax account before calling.
Postal Addresses
There are three different SDLT postal addresses depending on what you are sending. Using the wrong address may delay processing. None of these addresses require a street name, city, or PO box.
General enquiries and penalty appeals
HM Revenue and Customs
BX9 1HD
United Kingdom
Use this address for: general correspondence, penalty appeals (form SDLT46), and amendment requests. Do not send payments to this address.
Paper SDLT1 return submission
HMRC
BX9 1LT
Use this address when submitting a paper SDLT1 return. Note the different postcode: BX9 1LT, not BX9 1HD. If sending a cheque with a paper return, include the payslip from the back of the form.
Cheque payment for an electronic return
BX5 5BD
Use this address only when sending a cheque for an SDLT return that was filed electronically. Include a payslip or quote your UTRN. Make cheques payable to "HM Revenue and Customs only".
| Postcode | Use for | Do not use for |
|---|---|---|
| BX9 1HD | General correspondence, appeals, amendments | SDLT1 paper returns, payments |
| BX9 1LT | Paper SDLT1 return submissions | Electronic returns, general enquiries |
| BX5 5BD | Cheque payment for electronic return | Paper returns, correspondence |
Courier deliveries use a different address
If you are sending documents by courier rather than Royal Mail, a separate street address applies. Check the gov.uk contact page for the current courier address before arranging delivery.
Online Services
HMRC offers three SDLT-specific online services. These are available through the gov.uk website and, for returns and higher-rate refunds, require sign-in.
Pay SDLT
Pay your stamp duty online via bank transfer, debit card, or CHAPS. This is the fastest and most reliable payment method. Do not send payment to the postal addresses.
Pay nowOrder forms and payslips
Order paper SDLT1 (and supplementary forms SDLT2, SDLT3, SDLT4) and payslips online. Allow up to two weeks for delivery.
Order formsApply for higher-rate refund
If you paid the 5% additional property surcharge and later sold your previous main residence within 36 months, apply for a refund online via your HMRC account.
Claim refundThere is no general email address for SDLT enquiries. HMRC does not accept email contact for SDLT questions. Use the phone line for queries that cannot be resolved online.
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Which Channel to Use
Choosing the right contact channel saves time. Use this guide to find the fastest route for your situation.
| Your situation | Best channel | Notes |
|---|---|---|
| Pay your SDLT | Online | Instant via bank transfer; do not post payments |
| Order a paper SDLT1 form | Online | Allow 2 weeks for delivery |
| Submit a paper SDLT1 return | Post (BX9 1LT) | Do not use BX9 1HD for returns |
| Apply for higher-rate refund | Online | Must be within 36 months of previous home sale |
| Query a penalty notice | Phone or Post | Phone first; use form SDLT46 or a letter to BX9 1HD to appeal |
| Amend a submitted return | Phone or Post | Minor errors by phone; substantial errors write to BX9 1HD with UTRN and contract copy |
| General SDLT enquiry | Phone | 0300 200 3510, Mon-Fri 8:30am-5pm |
| Chase an SDLT5 certificate | Phone | Have your UTRN and effective date ready |
Before You Contact HMRC
Preparing the right information before calling or writing reduces the chance of being put on hold or asked to call back with more details.
Information to have ready
- +UTRN for the transaction (11 characters)
- +Effective date of the transaction (usually completion date)
- +Property address including postcode
- +National Insurance number and date of birth
- +Purchase price and any additional consideration
- +Details of any relief claimed (FTB, charity, right to buy)
What HMRC cannot help with
- -Legal advice on whether SDLT applies to your transaction
- -Solicitor disputes about who should have paid or filed
- -Calculations for future transactions you haven't entered into yet
- -LBTT or LTT queries (Scotland and Wales respectively)
- -Land Registry queries about registration or title
Personal tax account: Before calling, check your personal tax account at gov.uk/personal-tax-account. It shows your SDLT payment history and may contain the information you need without a phone call. It also lets you update your personal details, which HMRC uses for phone security checks.
Frequently Asked Questions
Can I email HMRC about stamp duty?
No. HMRC does not accept email contact for SDLT enquiries. There is no public email address for the SDLT helpline. You must use the phone (0300 200 3510), post (BX9 1HD for general correspondence), or the online services for paying, ordering forms, or claiming refunds.
What is the difference between BX9 1HD and BX9 1LT?
Both are HMRC SDLT postal addresses but they serve different purposes. BX9 1HD is for general correspondence: enquiries, penalty appeals (form SDLT46), and amendment requests. BX9 1LT is specifically for submitting paper SDLT1 returns. Using the wrong postcode may delay processing or misdirect your documents.
What hours can I call the SDLT helpline?
The SDLT helpline is open Monday to Friday, 8:30am to 5pm. It is closed on bank holidays. If you call outside these hours, you will not be connected to an adviser. The line can be busy during peak periods (particularly around Budget announcements or tax deadline periods), so calling early in the morning often results in shorter wait times.
How do I send a payment by cheque to HMRC for stamp duty?
The address depends on how you filed your return. If you filed a paper SDLT1 return, send the cheque with your payslip to: BT Stamp Duty Land Tax, HMRC, BX9 1LT. If you filed electronically, send the cheque with a payslip or your UTRN to: HMRC Direct, BX5 5BD. Make the cheque payable to "HM Revenue and Customs only". Allow 3 working days for a cheque to clear. The faster option is to pay online.
Is the Welsh Revenue Authority's phone line the same as HMRC?
No. The Welsh Revenue Authority (WRA) is a separate organisation that administers Land Transaction Tax (LTT) in Wales. Their number is 03000 254 000 and their opening hours are notably shorter: Monday to Friday, 10am to 3pm only. HMRC's SDLT line does not handle Welsh LTT enquiries, and the WRA line does not handle English SDLT enquiries.
Will HMRC advise me whether stamp duty applies to my transaction?
HMRC can provide general information about SDLT rules but cannot give legal advice on whether a specific transaction is chargeable. For complex cases (such as unusual reliefs, company purchases, or linked transactions), you should consult a solicitor or a chartered tax adviser who specialises in property transactions. HMRC's published guidance at gov.uk is authoritative for standard situations.
Emma Richardson, MRICS
Chartered Surveyor & Property Tax Specialist
Emma Richardson is a RICS-qualified Chartered Surveyor with over 12 years of experience in UK property taxation. She founded Calculate My Stamp Duty UK to help buyers understand the complex world of property transaction taxes.
Need to Calculate Your Stamp Duty First?
Before contacting HMRC, use our free calculator to check what you should owe. Having the correct figure ready will help your enquiry.