How to File an SDLT Return: Forms, Deadlines and Payment
A plain-English guide to filing a Stamp Duty Land Tax return. Covers the 14-day deadline, which form to use, all payment methods, penalties for late filing, how to amend a return, and how to appeal a penalty.
In this article
What Is an SDLT Return?
Stamp Duty Land Tax (SDLT) is a self-assessed tax. This means it is your responsibility, or your solicitor's acting on your behalf, to notify HMRC of every land transaction and pay any tax due. You do this by submitting an SDLT return.
The return must be filed within 14 days of the effective date of the transaction. This deadline applies even when no tax is owed: if your purchase price falls below the threshold, you still need to file a return unless the transaction is exempt (see below).
14-day rule
Both the return and the payment must reach HMRC within 14 days of the effective date. Missing either deadline triggers penalties and interest.
When is a return NOT required?
Certain transactions are exempt and do not require a return at all:
- No money or payment changes hands (pure gift, no debt transfer)
- Property left in a will
- Transfer due to divorce or civil partnership dissolution
- Freehold purchase under £40,000
- Leasehold of 7 or more years: premium under £40,000 and annual rent under £1,000
- Leasehold of less than 7 years: consideration below the residential or non-residential nil-rate threshold
If your transaction is not exempt, a return is compulsory regardless of the tax due. File on time to avoid a penalty.
Primary sources: HMRC: SDLT online and paper returns and HMRC: Pay SDLT. Last verified 2026-04-14.
When to File: Effective Date Rules
The 14-day clock starts from the effective date of the transaction, which is normally the completion date. However, a transaction can become effective before completion through a process called substantial performance.
What is substantial performance?
A contract is substantially performed (and the 14-day clock starts) when any of the following first occurs:
90% paid
The buyer pays 90% or more of the total consideration (purchase price or premium) before completion.
Buyer takes possession
The buyer is allowed into the property before the formal completion date (for example, to carry out works).
First rent paid
For leasehold transactions: the first periodic payment of rent is made under the lease before formal completion.
Practical note for most buyers: If you complete and move in on the same day, the effective date is simply that completion date. Substantial performance only becomes relevant in off-plan purchases, leasehold deals, or arrangements where you access the property before exchange completes formally.
Weekends and bank holidays
If the 14-day deadline falls on a weekend or bank holiday, both the return and the payment must reach HMRC by the end of the last working day before that date. Do not assume a Monday deadline gives you the weekend.
Which Form Do You Need?
Most transactions use a single form (SDLT1). Additional supplementary forms are required in specific circumstances. HMRC also issues two forms automatically in certain situations.
| Form | Name | When required |
|---|---|---|
| SDLT1 | Main return | Required for every notifiable transaction. Always filed first. |
| SDLT2 | Additional buyers/sellers | When there are more than 2 buyers or sellers. One SDLT2 per additional pair of parties. |
| SDLT3 | Multiple properties | When more than one property (land parcel) is included in the same transaction. One SDLT3 per additional property. |
| SDLT4 | Complex / commercial | Required for: complex leases, commercial or mixed-use transactions, purchases by a company or other corporate body, and business sales including property. |
| SDLT5 | Certificate of payment | Issued by HMRC after accepting the return. Not filed by the buyer: received from HMRC. Must be sent to HM Land Registry to complete property registration. |
| SDLT8 | Error notification | Sent by HMRC to you if your paper return contains errors that prevent processing. Not filed by the buyer: you receive it and then correct and resubmit. |
What is the SDLT5 certificate?
After HMRC accepts your return, it issues an SDLT5 certificate containing a unique transaction reference number (UTRN). This certificate is your proof of compliance. HM Land Registry will not register the property in your name without it: the SDLT5 must accompany your AP1 registration application and TR1 transfer deed.
Solicitors and conveyancers file electronically and receive the SDLT5 digitally, typically within minutes of submission. Self-filing buyers who use a paper SDLT1 receive a paper SDLT5 by post.
Online vs Paper Returns
Online return (via solicitor)
Solicitors and licensed conveyancers file online through HMRC's Stamp Taxes Online service. This is the standard route for represented buyers.
- SDLT5 certificate returned immediately on acceptance
- Faster turnaround for Land Registry registration
- Lower risk of errors triggering SDLT8
Paper SDLT1 (unrepresented buyer)
Buyers acting without a solicitor must use the paper SDLT1 form. Order forms from HMRC online or by phone. Allow 2 weeks for delivery.
- Allow time for form delivery and postal return
- Errors may trigger SDLT8 and delay your SDLT5
- Suitable if handling your own conveyancing
How to order and submit a paper SDLT1
- 1Order the form
Order form SDLT1 (and any supplementary forms) from HMRC online at gov.uk/guidance/stamp-duty-land-tax-online-and-paper-returns or by calling the SDLT helpline. Allow up to 2 weeks for delivery.
- 2Complete the return
Fill in SDLT1 in black ink. Include supplementary forms SDLT2, SDLT3, or SDLT4 if required. Attach a payslip (from the back of the form) if paying by cheque.
- 3Post the return
Send to: BT Stamp Duty Land Tax, HM Revenue and Customs, BX9 1LT. No street, town or county is needed. Royal Mail will deliver to this address without them.
- 4Wait for your SDLT5
HMRC will post your SDLT5 certificate once the return is accepted. If there are errors, you will receive an SDLT8 explaining what needs correcting.
Timing warning: Paper processing takes time. If you are filing close to the 14-day deadline, allow at least 3 working days for first-class post and remember that HMRC needs to receive (not just postmark) the return in time. Consider using recorded delivery as proof of posting.
How to Pay SDLT
Your Unique Transaction Reference Number (UTRN)
Every SDLT transaction is assigned a UTRN. You must quote this reference on all payments so HMRC can match the money to the correct return.
Format: 11 characters total: 9 numbers followed by 2 letters.
123456789MC
Found on: your paper SDLT1 return, or on the electronic SDLT5 certificate issued after acceptance. One UTRN per transaction. Do not reuse across multiple returns.
Payment methods
| Method | Timing | Notes |
|---|---|---|
| Online banking approval | Instant (up to 2 hours) | Sign in to your bank and approve a payment to HMRC. Fastest option. |
| Debit or corporate credit card | Same day | Personal credit cards are NOT accepted. A non-refundable fee applies to corporate credit cards. |
| CHAPS / Faster Payments | Same or next working day | Use the HMRC Shipley bank details below. Quote UTRN as payment reference. |
| Bacs | 3 working days | Allow the full 3 days. Initiate well before the deadline if using Bacs. |
| Cheque | 3 working days | Made payable to "HM Revenue and Customs only". Address depends on how you filed (see below). |
Personal credit cards not accepted. HMRC does not accept payments by personal credit card for SDLT. Use a debit card, corporate credit card, or bank transfer instead.
HMRC bank details (CHAPS, Faster Payments, Bacs)
| Detail | Value |
|---|---|
| Account name | HMRC Shipley |
| Sort code | 08 32 10 |
| Account number | 12001020 |
| IBAN (overseas) | GB03 BARC 2011 4783 9776 92 |
| BIC / SWIFT (overseas) | BARCGB22 |
| Bank | Barclays Bank Plc, 1 Churchill Place, London E14 5HP |
All payments must be in pound sterling. Quote your UTRN as the payment reference.
Cheque postal addresses
There are two different addresses for cheque payments depending on how you filed your return:
If you filed a paper return
BT Stamp Duty Land Tax
HM Revenue and Customs
BX9 1LT
Include the payslip from the back of your SDLT1 form.
If you filed electronically
HMRC Direct
BX5 5BD
Include a payslip or quote your UTRN on the back of the cheque.
Weekend and bank holiday rule: If the 14-day deadline falls on a weekend or bank holiday, payment must reach HMRC by the end of the previous working day. Bacs and cheque (3 working days) are particularly vulnerable here: start early.
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Penalties and Interest
Filing or paying late triggers automatic penalties. These apply even if no tax is owed. The return itself must be filed on time.
Fixed penalties
| How late | Penalty | Notes |
|---|---|---|
| Up to 3 months late | £100 | Fixed charge. Applies from day 1 after the deadline. |
| More than 3 months late | £200 | Second fixed charge. Replaces (does not add to) the £100 penalty. |
| 12 months or more late | Tax-based penalty | Up to the full amount of tax due, depending on behaviour (careless or deliberate). Stacks on top of the fixed penalties. |
Interest on unpaid tax
In addition to the fixed penalties above, HMRC charges interest on any unpaid tax from the day after the 14-day deadline. Interest accrues daily until the full amount is paid. This is separate from the filing penalty: even if you filed on time, unpaid tax still attracts interest.
Summary: costs of late filing
- Day 1 to 3 months late: £100 fixed penalty
- Over 3 months late: penalty increases to £200
- 12 months or more: additional tax-based penalty (up to 100% of tax)
- Interest on unpaid tax: charged from day 15 until paid in full
Amending a Return and Claiming Refunds
Amendment window
You have 12 months from the original filing date to amend an SDLT return. After that, HMRC will not accept amendments through the standard process (overpayment relief may still be available in limited circumstances).
How you amend depends on the type of error:
Minor errors
Call the SDLT helpline on 0300 200 3510 (Monday to Friday, 8:30am to 5pm). Have your UTRN ready. Minor corrections (wrong date, small numerical error) can often be resolved by phone.
Substantial errors
Write to HMRC with your UTRN and a copy of the original contract. Substantial errors include changes to the purchase price, buyer type, or property details that affect the tax calculation.
Claiming a refund
Apply for a refund online at gov.uk/stamp-duty-land-tax/refunds. The time limits vary by refund type:
| Refund type | Time limit |
|---|---|
| Higher rate (additional property surcharge): sold previous home | 12 months from date of sale of previous property, OR 12 months from the original filing date, whichever is later. Must be within 3 years of purchase. |
| Non-UK resident surcharge: subsequently met residence tests | Within 2 years of the date of purchase. |
Higher rate refund example: You completed on a second property in March 2026 and paid the 5% surcharge. You sell your previous main home in January 2027. You then have until January 2028 (12 months from the sale) to claim the surcharge refund, as long as this falls within 3 years of the original purchase.
Appealing a Penalty
If you believe a penalty was issued incorrectly, or if you have a reasonable excuse for the late filing, you can appeal. The process is straightforward but has a strict deadline.
- 1Obtain form SDLT46
Download or order form SDLT46 from HMRC. Read the SD7 guidance notes before completing it. They explain what constitutes a reasonable excuse.
- 2Submit within 30 days
Your appeal must reach HMRC within 30 days of the date on the original penalty notice. Missing this deadline means the penalty becomes final.
- 3Post to the correct address
Send SDLT46 to: HMRC, BT - Stamp Duty Land Tax, BX9 1HD, United Kingdom
- 4Pay the penalty in the meantime
You must pay the penalty while your appeal is being considered. If you win, HMRC will repay the amount with interest.
What counts as a reasonable excuse?
HMRC accepts
- Return posted in good time but lost or delayed in post (e.g. flooding, postal strike)
- Your adviser suffered a serious illness preventing them from managing affairs (e.g. heart attack, stroke)
- Your adviser died
HMRC rejects
- The return was too difficult or complex to complete
- Work pressure stopped you dealing with it
- Your adviser was waiting for you to pay the SDLT first
- Waiting for a valuation (use your best estimate and amend later)
- The seller's adviser caused the delay
- You were abroad and could not sign (arrange power of attorney)
Escalation: If your appeal is not settled by agreement with HMRC, you can escalate to the independent Tax Tribunal. The tribunal is independent of HMRC and can overturn penalty decisions.
Source: HMRC: SDLT appeal against a penalty. Last verified 2026-04-14.
Frequently Asked Questions
Do I need to file an SDLT return if no tax is due?
Usually yes. If your transaction is notifiable (meaning the consideration meets or exceeds the filing threshold), you must still file a return even if the tax calculation produces zero. The only exceptions are fully exempt transactions (such as a pure gift with no debt transfer, or a property left in a will). When in doubt, file: the penalty for not filing is the same whether or not any tax was due.
Can I file my own SDLT return without a solicitor?
Yes. If you are buying a property without legal representation, you can file a paper SDLT1 return yourself. Order the form from HMRC (allow 2 weeks for delivery), complete it in black ink, and post it to BT Stamp Duty Land Tax, HM Revenue and Customs, BX9 1LT. That said, self-filing carries more risk of errors, which can delay your SDLT5 certificate and therefore your Land Registry registration. Most buyers use a solicitor precisely to handle the return.
What happens after HMRC accepts my SDLT return?
HMRC issues an SDLT5 certificate containing your Unique Transaction Reference Number (UTRN). This certificate is your proof that SDLT has been dealt with. Your solicitor then sends the SDLT5 to HM Land Registry along with the registration application (form AP1) and transfer deed (form TR1). Without the SDLT5, Land Registry will not register you as the new owner. For electronic returns the SDLT5 arrives within minutes; for paper returns it arrives by post.
I missed the 14-day deadline. What should I do?
File and pay as soon as possible. The longer you wait, the larger the penalty. A fixed £100 penalty applies for the first 3 months of delay; this rises to £200 after 3 months, and a tax-based penalty can be added if the return is 12 months or more late. Interest on any unpaid tax runs from day 15 onwards. Once you have filed, you can appeal the fixed penalty using form SDLT46 if you have a genuine reasonable excuse.
Where can I find my UTRN?
Your UTRN is the 11-character reference (9 numbers followed by 2 letters, for example 123456789MC) that HMRC assigns to your transaction. If you used a solicitor, it appears on your SDLT5 certificate and your completion statement. If you filed a paper return yourself, it is printed on the SDLT5 HMRC posts back to you. You need the UTRN to make bank-transfer payments to HMRC and to quote if you contact the helpline about the return.
Can I amend an SDLT return after submitting it?
Yes, within 12 months of the original filing date. Minor corrections (such as a date or small numerical error) can often be resolved by calling the SDLT helpline on 0300 200 3510. More substantial changes, such as a revised purchase price or a change in buyer type, should be submitted in writing with your UTRN and a copy of the relevant contract. If the amendment increases the tax, you will need to pay the difference; if it reduces the tax, HMRC will refund the overpayment.
Calculate your stamp duty before you file
Use our free calculator to confirm the SDLT amount before completing your return. It covers all buyer types and shows a band-by-band breakdown.
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.
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