Stamp Duty Penalties and Appeals

When you buy shares, you need to pay Stamp Duty within a strict 30-day deadline. Miss this deadline and you'll face penalties and interest charges that add to your bill. This guide explains how penalties are calculated, when HMRC might cancel them, and what to do if you disagree with a charge.

The 30-day deadline

You must get your share transfer documents stamped by HMRC within 30 days of when they were signed and dated (known as 'executed'). If the documents were signed abroad, the 30-day clock starts when you first receive them in the UK—you'll need to confirm the receipt date in writing to HMRC.

Missing this deadline triggers automatic penalties and interest charges, even if you eventually pay the Stamp Duty itself.

How late submission penalties work

Penalties are charged separately for each document you submit late. The amount depends on how long you've delayed:

Up to 12 months late: 10% of the Stamp Duty owed, capped at £300
12 to 24 months late: 20% of the Stamp Duty owed
More than 24 months late: 30% of the Stamp Duty owed

HMRC won't charge any penalty less than £20, and all penalties are rounded down to the nearest £5.

For example, if you paid £20,000 for shares, the Stamp Duty would be £100 (charged at 0.5% on shares). If you submitted the transfer form 13 months late, you'd pay a penalty of £20 (20% of £100).

You must pay both the penalty and the original Stamp Duty amount. The penalty rates apply to documents submitted late from 1 October 2014 onwards.

If HMRC finds evidence that you deliberately delayed submitting documents for 12 months or more, the penalty rate can be increased beyond the standard percentages.

Interest charges on late payment

If you don't pay Stamp Duty on time, you'll be charged daily interest from the deadline until the day you actually pay. This is separate from any late submission penalty.

Interest is calculated using the official rate set by HM Treasury. The amount depends on how much duty you owe and how long the payment is overdue.

If the total interest comes to less than £25 per document, HMRC won't charge it. Once HMRC notifies you of the interest amount, you have 14 days to pay. You cannot appeal against interest charges—they're a commercial charge for HMRC not receiving money when it was due, not a penalty.

When HMRC will cancel a penalty

HMRC will only cancel a late submission penalty if you have a "reasonable excuse". Each case is considered on its merits, but examples of reasonable excuses include:

You posted your documents in good time but they were lost or delayed due to industrial action at the Post Office or courier service
The original document was destroyed by fire, flood, or another natural disaster at your solicitor's office
Your solicitor suffered a serious illness that prevented them from managing their business affairs
Your solicitor died

Excuses HMRC won't accept

HMRC will not accept the following as reasonable excuses:

Your solicitor was waiting for you to pay the Stamp Duty, or another solicitor was meant to pay it
You were waiting for a valuation (you should submit documents while the valuation is being decided)
The delay was caused by the vendor's solicitor
There was a disagreement between solicitors
You were abroad and couldn't sign (you should arrange a Power of Attorney)
Documents were held by another government department, such as the Land Registry

Personal reasons won't be accepted as reasonable if they didn't prevent you from managing your other affairs.

What happens if you don't pay

HMRC will only stamp your documents once you've paid the full amount of Stamp Duty, plus any penalty and interest. An unstamped document cannot be used for any legal purpose.

If you don't pay the full amount, HMRC will write to tell you how much more you need to pay. They'll either return your documents unstamped along with any duty you've already paid, or keep them until you pay in full. If documents are returned to you, remember to re-send them with your payment.

Pay the amount stated in HMRC's letter within the time given, or you'll face additional interest charges.

Requesting an informal opinion

If you're submitting documents late and unsure how much penalty and interest to pay, you can request an "informal opinion" from HMRC. Email the HMRC Stamp Office with the subject line "Stamp Duty informal opinion", stating clearly what you want their view on and quoting any reference numbers you have. Include scanned copies of relevant documents like stock transfer forms to speed up the process.

HMRC can tell you:

How much Stamp Duty is chargeable on a specific transfer
Whether any penalties are due
How much interest you owe for late payment
Whether you can claim Stamp Duty relief or if your transfer is exempt

Most queries are resolved through this informal opinion process.

Requesting a formal opinion

If you have strong grounds for disagreeing with HMRC's informal opinion, you can request a formal opinion (known as "adjudication"). HMRC will only issue formal opinions in rare cases of ongoing disagreement, so make sure you have solid reasons before requesting one.

Contact HMRC to explain why you disagree and send copies of any relevant documents. You can also phone the Stamp Taxes Helpline to discuss your concerns before requesting a formal opinion.

Appealing a penalty

You have the right to appeal any Stamp Duty penalty you disagree with. You must appeal in writing within 30 days of receiving the formal adjudication notice.

Mark your letter "Stamp Duty", include any reference numbers, and send it to HMRC Birmingham Stamp Office.

Most appeals are settled by agreement with HMRC. If you can't reach a settlement, you can ask HMRC to review their decision or request an independent tribunal to consider your appeal.

Challenging interest charges

You cannot formally appeal interest charges, but if you believe you shouldn't be charged interest or have been charged too much, write to the Finance Team at Birmingham Stamp Office explaining why. Mark your letter "Stamp Duty" and include any reference numbers.

Sources

This article provides general guidance based on current HMRC rules. For advice specific to your situation, speak to your accountant.