Stamp Duty in Northern Ireland: What You Need to Know

Stamp Duty rates in Northern Ireland (current residential bands)

GOV.UK lists the standard SDLT rates for a single property (where, after buying, it’s the only residential property you own):

The key idea (and the bit most people miss)

You don’t pay one flat percentage on the whole price. You pay 0% on the first band, then the next rate only applies to the part of the price within that band.

How much stamp duty will I pay? (worked example)

GOV.UK provides an example for a £295,000 purchase (April 2025 example), calculated as:

• 0% on the first £125,000
• 2% on the next £125,000
• 5% on the remaining £45,000

Total SDLT in that example is £4,750.

If you want a quick estimate for your specific number, use Crawford Mulholland’s Stamp Duty Calculator.

Stamp duty for first‑time buyers in Northern Ireland

If you’re buying your first home, GOV.UK states you can claim first‑time buyer relief if you and anyone you’re buying with are first‑time buyers. You then pay:

• 0% SDLT up to £300,000
• 5% on the portion from £300,001 to £500,000
• If the price is over £500,000, you cannot claim the relief.

GOV.UK also provides an example: a first‑time buyer purchasing at £500,000 pays £10,000 SDLT (0% up to £300k and 5% on the remaining £200k).

If you’re buying your first property and want a plan that’s easy to follow, start here: First-Time Buyer Mortgages.

Buying an additional property (second home / buy‑to‑let)

If buying a new residential property means you’ll own more than one, GOV.UK states you’ll usually pay 5% on top of the standard SDLT rates (higher rates).

This is one of the biggest “budget shocks” we see for:

• landlords buying another property,
• families buying a second home,
• people buying before selling their current main residence.

If your purchase is investment‑led, this hub is the right place to start: Buy-To-Let & Ltd Co Mortgages.

“We’re moving home” — do we pay the higher rates?

Not always.

GOV.UK states you will not pay the extra 5% if both apply:

• the property you’re buying is replacing your main residence, and
• your previous main residence was sold within 36 months of completing your new purchase.

If you haven’t sold your main residence on the day you complete your purchase, GOV.UK notes you’ll have to pay the higher rates (because you own 2 properties), but you may be eligible for a refund if you later sell within the timeframe.

If you’re navigating timing, chain pressure and affordability at the same time, use this as your main hub (new page): Moving Home Mortgages.

Non‑UK resident surcharge (important for expats and overseas buyers)

GOV.UK states that if you’re not present in the UK for at least 183 days during the 12 months before your purchase, you’re treated as “not a UK resident” for SDLT purposes and you’ll usually pay a 2% surcharge when buying residential property in England or Northern Ireland.

This can materially change the cash needed to complete, so it’s worth checking early rather than at the solicitor stage.

When do you pay stamp duty?

GOV.UK guidance states you must submit an SDLT return and pay any duty within 14 days of the “effective” transaction date (usually completion).

In most standard purchases, your solicitor or conveyancer handles filing and payment — but the cost still comes from you, so you need it in the budget.

What affects your stamp duty bill in real life?

These are the factors that most often change the number:

• Purchase price (obvious, but crucial)
• First-time buyer relief eligibility
• Additional property rules (higher rates)
• Timing if you buy before you sell (refund rules may apply)
• Residency status (non‑resident surcharge)
• Certain “special case” rules (e.g., shared ownership, multiple dwellings, corporate bodies) — GOV.UK notes there are different SDLT rules for these situations.