Stamp Duty in Northern Ireland: Rates, Exemptions and How to Calculate It

How stamp duty works in Northern Ireland

Stamp Duty Land Tax (SDLT) is the tax you pay when you buy a property or land over a certain price in Northern Ireland. NI follows the same stamp duty rules as England (Scotland and Wales have their own systems).

Stamp duty is a tiered tax, which means you only pay the higher rate on the portion of the price that falls within each band, not on the whole amount. This is similar to how income tax works.

Standard stamp duty rates (from April 2025)

These are the rates that apply to most home buyers who already own (or have previously owned) a property:

• Up to £125,000: 0%
• £125,001 to £250,000: 2%
• £250,001 to £925,000: 5%
• £925,001 to £1,500,000: 10%
• Over £1,500,000: 12%

Worked example: home mover buying at £250,000

• First £125,000 at 0% = £0
• Remaining £125,000 at 2% = £2,500
• Total stamp duty: £2,500

Worked example: home mover buying at £350,000

• First £125,000 at 0% = £0
• Next £125,000 at 2% = £2,500
• Remaining £100,000 at 5% = £5,000
• Total stamp duty: £7,500

First-time buyer relief

First-time buyers get a more generous nil-rate band. From April 2025, the rates for first-time buyers purchasing a property costing up to £500,000 are:

• Up to £300,000: 0%
• £300,001 to £500,000: 5%

If the property costs more than £500,000, you cannot use first-time buyer relief and the standard rates apply instead.

Worked example: first-time buyer at £180,000

• Entire amount within the £300,000 nil-rate band
• Total stamp duty: £0

Worked example: first-time buyer at £350,000

• First £300,000 at 0% = £0
• Remaining £50,000 at 5% = £2,500
• Total stamp duty: £2,500

To qualify as a first-time buyer, you must never have owned a property anywhere in the world. This includes inherited property. Both buyers (if purchasing jointly) must be first-time buyers.

Additional property surcharge

If you are buying a second home, a holiday let, or a buy-to-let investment property, you pay a 5% surcharge on top of the standard rates. This surcharge was increased from 3% to 5% in October 2024.

The surcharge applies to the entire purchase price. So for a buy-to-let purchase at £200,000:

• First £125,000 at 0% + 5% = £6,250
• Remaining £75,000 at 2% + 5% = £5,250
• Total stamp duty: £11,500

If you are replacing your main residence (selling one home and buying another), the surcharge does not apply, even if there is an overlap where you technically own two properties.

Non-resident surcharge

Buyers who are not UK resident pay an additional 2% surcharge on top of all other rates. This stacks with the additional property surcharge if applicable.

When do you pay?

Stamp duty must be paid within 14 days of completion. Your solicitor will normally handle this for you, submitting the return and making the payment from the funds held in their client account.

Can you add stamp duty to your mortgage?

Some lenders will allow you to add stamp duty to your mortgage, increasing the amount you borrow. This avoids the need to find the cash upfront, but it means you pay interest on the stamp duty for the life of the mortgage, so it costs more in the long run.

Whether this makes sense depends on your situation. CGR Financial is independent and FCA-regulated, with access to a wide range of products from across the market. They can advise on whether adding stamp duty to your mortgage is right for you.

Key points to remember

• Northern Ireland uses the same SDLT rates as England.
• First-time buyers pay nothing on properties up to £300,000 (purchases up to £500,000).
• The additional property surcharge is 5% from October 2024.
• Stamp duty is a tiered tax; you only pay the higher rate on the portion within each band.
• Your solicitor handles the payment and filing.

For help understanding how stamp duty affects your purchase, or to talk through your buying plans, get in touch with our team or browse our current listings.