SDLT When Buying Through a Limited Company: What Landlords Must Know

A limited company buying a residential property in England pays the 5% higher rates for additional dwellings on the whole purchase price, with no exemption for a first company purchase. This is the single most important point about stamp duty buy-to-let 2026 planning for landlords who use a corporate structure: the surcharge that individuals only pay on a second property applies to a company from its very first acquisition. Understanding how Stamp Duty Land Tax (SDLT) works through a company helps landlords budget accurately and avoid nasty surprises at completion. Blue Tick Accountants, a Guildford-based UK tax advisory and accountancy practice, advises landlords across the country on structuring property purchases tax-efficiently. This article explains the rates a company pays, how the SDLT landlord surcharge applies, the special 17% rate on high-value dwellings, the reliefs available, and how recent reforms affect your figures.

Key Takeaways

• A limited company buying residential property in England pays the 5% higher rates for additional dwellings on top of standard SDLT rates from its first purchase.
• The additional dwellings surcharge rose from 3% to 5% on 31 October 2024 and remains at 5% for the 2026/27 tax year.
• Standard residential SDLT starts at 0% up to £125,000, so a company's effective bottom rate is 5% on the first £125,000.
• A company purchase of a single dwelling costing more than £500,000 can trigger a flat 17% SDLT rate unless a relief such as property rental business relief applies.
• The SDLT surcharge applies to any company purchase of a dwelling priced above £40,000, regardless of whether the company already owns property.
• SDLT is payable within 14 days of completion, and a return must be filed even when no tax is due.

What SDLT rates does a limited company pay in 2026/27?

A limited company pays the standard residential SDLT rates plus a 5% surcharge on every band when it buys a dwelling. For the 2026/27 tax year, the combined rates for a company purchase are 5% on the portion up to £125,000, 7% from £125,001 to £250,000, 10% from £250,001 to £925,000, 15% from £925,001 to £1.5 million, and 17% above £1.5 million. Because the surcharge starts at the first pound of a qualifying purchase, there is no tax-free band for a company as there would be for an individual buying their only home.

Consider a company buying a buy-to-let flat for £300,000. The SDLT is 5% on the first £125,000 (£6,250), 7% on the next £125,000 (£8,750), and 10% on the remaining £50,000 (£5,000). The total SDLT is £20,000, an effective rate of 6.7%. An individual replacing their main home would pay £5,000 on the same property, which shows the cost of the SDLT landlord surcharge in cash terms.

When does the higher rates for additional dwellings surcharge apply?

The higher rates for additional dwellings surcharge applies to almost every residential purchase made by a limited company where the price exceeds £40,000. Unlike an individual, who only pays the surcharge when they already own another dwelling, a company is treated as buying an additional dwelling by default. This means the 5% surcharge is unavoidable on standard company buy-to-let purchases, and it applies whether the property is the company's first, fifth, or fiftieth.

The £40,000 threshold is measured against the whole consideration, and once it is exceeded the surcharge applies to the entire price, not just the excess. Mixed-use property, such as a shop with a flat above, is taxed at the non-residential rates instead and does not attract the additional dwellings surcharge, which can make genuinely mixed transactions cheaper. Getting the classification right matters, and HMRC scrutinises mixed-use claims closely.

What is the 17% flat SDLT rate for companies?

A flat 17% SDLT rate applies where a company or other non-natural person buys a single dwelling costing more than £500,000, unless a relief removes the charge. This higher-rate charge exists to discourage "enveloping" of expensive homes inside companies for private use. For most landlords running a genuine property rental business, property rental business relief prevents the 17% flat rate from applying, so the transaction falls back to the ordinary residential rates plus the 5% surcharge described above.

To keep the relief, the property must be held for a qualifying commercial purpose, typically letting to unconnected tenants on arm's-length terms, and must not be occupied by anyone connected to the company. If a connected person, such as a director or their family, later moves in within three years, the relief can be withdrawn and the 17% charge clawed back. For a full overview of how these rules fit together, see our guide to stamp duty land tax for landlords.

What reliefs and refunds can reduce a company's SDLT?

Several reliefs can reduce or reshape a company's SDLT bill, and multiple dwellings within one transaction may qualify for non-residential treatment. When a company buys six or more dwellings in a single transaction, it can choose to apply the non-residential SDLT rates, which top out at 5% and do not carry the additional dwellings surcharge. This can produce a materially lower bill for portfolio acquisitions.

A worked comparison shows the effect. A company buying six flats for £900,000 in one transaction pays residential rates plus surcharge of £80,000, but electing the non-residential rates gives SDLT of £34,500, a saving of £45,500. The election is not automatic and must be claimed on the SDLT return, so calculating both bases before completion is essential. Blue Tick reviews each transaction to identify whether multiple dwellings treatment, non-residential rates, or property rental business relief produces the lowest lawful figure.

The stamp duty cost is one input into the wider structural decision covered in our guide to buying and holding property through a company.

Frequently Asked Questions

Does a limited company pay the stamp duty surcharge on its first property?

Yes. A limited company pays the 5% higher rates for additional dwellings surcharge on its first residential purchase costing more than £40,000. Unlike an individual, a company does not get a surcharge-free first property, so the 5% applies from the very first acquisition and on every purchase after it.

How much SDLT does a company pay on a £250,000 buy-to-let?

A company buying a £250,000 buy-to-let in 2026/27 pays £15,000 in SDLT. This is 5% on the first £125,000 (£6,250) plus 7% on the next £125,000 (£8,750). The figure reflects the standard residential rates plus the 5% additional dwellings surcharge that applies to company purchases.

Is buying property through a company cheaper for SDLT than buying personally?

No. SDLT is generally the same or higher through a company because the 5% surcharge always applies, whereas an individual replacing their main residence pays no surcharge. Incorporation can still bring income tax and inheritance tax advantages, but SDLT is rarely the reason to use a company.

When must a company pay SDLT after buying a property?

A company must file its SDLT return and pay the tax due within 14 days of the effective date of the transaction, which is usually completion. A return is required even where no SDLT is payable. Late filing or payment triggers penalties and interest charged by HMRC.

Can a company reclaim the SDLT surcharge later?

A company cannot reclaim the additional dwellings surcharge in the way an individual can when replacing a main home, because the company is not treated as replacing a residence. Refunds are limited to specific situations, such as an overpayment or a successful relief claim, so accurate calculation before completion is the safer route.

How Blue Tick Can Help

Blue Tick Accountants helps landlords calculate SDLT accurately before completion, model the difference between personal and corporate purchases, and claim every relief a transaction qualifies for, including the six-or-more non-residential election and property rental business relief. Getting the figure right before you exchange protects your cash flow and your returns. Head to our website and book a meeting now.

Conclusion

Buying residential property through a limited company almost always means paying the 5% additional dwellings surcharge from the first purchase, so a company's SDLT bill is higher than an individual buying their only home. The reliefs available, from non-residential rates on six or more dwellings to property rental business relief on high-value homes, can significantly change the figure. Calculate SDLT on every available basis before you exchange, and take advice where a portfolio deal or a high-value property is involved.

About the Author

This guide was written by Leon, founder of Blue Tick Accountants, a Guildford-based UK tax advisory and accountancy practice that helps landlords, limited company owners and the self-employed across the UK structure property purchases tax-efficiently. It was last reviewed for the 2026/27 tax year.

This article is intended for general informational purposes only and does not constitute tax, legal, or financial advice. Tax rules are subject to change and their application will depend on your individual circumstances. You should always seek advice from a qualified professional before taking action. Blue Tick Accountants accepts no liability for decisions made on the basis of this content.