Setting Up a Property Company for Buy-to-Let: A Landlord's Tax Guide

If you're a buy-to-let landlord, you've almost certainly heard fellow landlords talking about transferring their properties into a limited company. Record numbers are doing it — and for good reason. Tax changes over the last decade have made personal ownership significantly less attractive for many landlords, particularly higher and additional rate taxpayers.

But is incorporation the right move for you? It's not a straightforward decision, and getting it wrong can be costly. In this guide, we'll walk through the pros and cons, the tax implications, and the practical steps involved in setting up a property company for buy-to-let.

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Why Are Landlords Moving to Limited Companies?

The catalyst for this shift was the phased removal of buy-to-let mortgage interest tax relief.

Before April 2017, landlords could deduct their full mortgage interest costs from their rental income before calculating their tax bill. That changed with the government's rollout of Section 24 restrictions, which were fully in effect from April 2020.

Under the current rules, individual landlords can no longer deduct mortgage interest as an expense. Instead, they receive a basic-rate 20% tax credit on their mortgage interest payments.

This hits higher and additional rate taxpayers hardest. They previously received 40% or 45% relief on mortgage interest — now they only get 20%. For many landlords, particularly those with large mortgages, this has resulted in significantly higher tax bills — even where their actual profits haven't changed.

Limited companies, on the other hand, are not affected by Section 24. A property company can still deduct mortgage interest in full as a legitimate business expense before calculating its corporation tax liability.

This single difference is the primary reason so many landlords have incorporated.

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How Does a Buy-to-Let Limited Company Work?

When you own rental property personally, the rental income is yours and you pay income tax on it.

When you own through a limited company, the property — and the rental income — belongs to the company, not to you personally. You become a shareholder in your own company.

To extract money from the company, you typically have two options:

• Salary: Pay yourself a salary through PAYE. This is an allowable expense for the company, reducing its corporation tax bill, though it's subject to income tax and National Insurance on your side.
• Dividends: Take profits as dividends. The first £500 of dividend income is tax-free (the dividend allowance), with rates of 8.75%, 33.75%, and 39.35% on amounts above that, depending on your tax band.

Many landlords use a combination of both — taking a small salary up to the National Insurance threshold to minimise personal tax, and the remainder as dividends.

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Corporation Tax vs Income Tax: The Numbers

Let's look at the headline rates:

Individual Ownership — Income Tax

• 20% on rental income between £12,571 and £50,270 (basic rate)
• 40% on income between £50,271 and £125,140 (higher rate)
• 45% on income above £125,141 (additional rate)

Limited Company Ownership — Corporation Tax

• 19% on annual profits up to £50,000
• Between 19% and 25% on profits between £50,000 and £250,000 (tapered)
• 25% on profits above £250,000

At first glance, the corporation tax rates look attractive — particularly for higher-rate taxpayers. But the comparison isn't as simple as it looks, because you also need to factor in the cost of extracting money from the company (salary and dividend tax).

The real benefit of incorporation comes when you reinvest profits to grow your portfolio. If you leave the money in the company to fund future property purchases, you avoid the personal tax hit on extraction entirely — and your reinvested funds grow at the lower corporation tax rate.

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The Pros of Setting Up a Property Company

1. Mortgage Interest Relief Restored

As discussed, limited companies can deduct mortgage interest in full. For landlords with significant borrowing, this is the single biggest tax saving.

2. Lower Headline Tax Rate

Corporation tax (19–25%) is lower than higher and additional rate income tax (40–45%). If you're reinvesting profits rather than extracting them, the difference compounds over time.

3. Inheritance Tax Planning

A property portfolio held in a limited company may qualify for Business Property Relief (BPR), potentially allowing you to pass the business to your family with up to 100% relief from inheritance tax. Personally held property doesn't enjoy the same advantage.

4. Limited Liability Protection

A limited company structure provides a degree of legal protection. If something goes wrong — a tenant dispute, a contractual issue — your personal assets are generally shielded because liability is limited to the company.

5. Portfolio Growth

Keeping profits within the company allows you to build a deposit for your next purchase without first paying personal tax on the income. This can significantly accelerate portfolio growth.

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The Cons and Costs of Incorporation

1. The Cost of Transferring Existing Properties

If you already own properties personally and want to transfer them to a company, you're effectively selling them from yourself to your company. This triggers:

• Capital Gains Tax (CGT): You'll pay CGT on any gain in value since you bought the property, at residential property rates of 18% (basic) or 24% (higher). There's no automatic relief for transferring to your own company.
• Stamp Duty Land Tax (SDLT): Your company must pay SDLT on the market value of the property being transferred, including the 5% additional property surcharge.

These costs can be substantial — sometimes running into tens of thousands of pounds — and need to be weighed against the future tax savings.

3. Extraction Costs

When you want to use the rental income personally, you'll pay tax on it through salary or dividends. The effective rate can approach — and sometimes exceed — the income tax rate you'd have paid as an individual landlord, once dividend tax is factored in.

4. More Admin and Compliance

Running a limited company means:

• Filing annual accounts with Companies House
• Filing a corporation tax return with HMRC
• Maintaining proper accounting records
• Filing a confirmation statement each year
• Registering for and operating PAYE if you pay yourself a salary

Many landlords outsource this to an accountant, which adds to the ongoing cost.

5. Mortgage Availability

Limited company buy-to-let mortgages (often called "special purpose vehicle" or SPV mortgages) are widely available, but they typically come with slightly higher interest rates and arrangement fees than personal buy-to-let mortgages. The market has improved significantly in recent years, but the cost differential remains.

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How to Set Up a Buy-to-Let Limited Company

If you decide incorporation is right for you, the process involves five key steps:

1. Register with Companies House — The standard fee starts at £12. You'll need to choose a company name and provide a registered office address.
2. Define the business activity — Your company's Standard Industrial Classification (SIC) code should reflect property letting (typically 68209 — "Letting and operating of own or leased real estate").
3. Appoint directors and shareholders — You'll typically be both director and shareholder. Decide on the share structure — including whether to include spouses or family members as shareholders for income-splitting purposes.
4. Set up a business bank account — Lenders will expect to see the company's finances properly ring-fenced from your personal accounts.
5. Register for corporation tax — This is done automatically when you incorporate, but you must also keep records and file returns.

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Should You Incorporate? Key Factors to Consider

There's no one-size-fits-all answer. The decision depends on your individual circumstances. Here are the key questions to ask:

What Tax Band Are You In?

Incorporation generally benefits higher and additional rate taxpayers most. If you're a basic rate taxpayer, the savings may be minimal — or even negative once extraction costs are factored in.

Are You Reinvesting or Extracting?

If you plan to reinvest rental profits to grow your portfolio, incorporation is highly attractive — the company pays a lower tax rate and you defer personal tax until you extract funds. If you need all the rental income to live on, the benefit diminishes significantly.

How Many Properties Do You Have?

For a single property, the costs and admin of incorporation often outweigh the benefits. For a portfolio of multiple properties, the savings can be considerable.

How Big Is Your Mortgage?

The larger your mortgage interest bill, the more you stand to benefit from the full mortgage interest relief available to companies.

Will You Be Transferring Existing Properties?

If you're transferring properties you already own, factor in the CGT and SDLT costs. You may need to hold the properties within the company for several years before the tax savings outweigh the transfer costs.

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Capital Gains Tax: Company vs Individual

When you sell a personally held property, you pay CGT on the gain above the annual exempt amount (currently £3,000). Residential property CGT rates are 18% (basic rate) and 24% (higher rate).

When a limited company sells a property, it doesn't pay CGT. Instead, the profit is added to the company's annual income and taxed as part of its overall profits at corporation tax rates (19–25%).

This can be advantageous — but remember that if you then want to extract that profit from the company, you'll pay dividend tax on top.

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The Bottom Line

Setting up a property company for buy-to-let can deliver real tax savings — but it's not a magic bullet. The structure that works best depends on your tax band, portfolio size, mortgage levels, and whether you're reinvesting or extracting income.

For higher-rate taxpayers with significant mortgage interest costs and plans to reinvest, incorporation is often the clear winner. For basic-rate taxpayers with a single property and a small mortgage, the admin and costs may not be justified.

The most expensive mistake is making this decision without proper advice. Getting it wrong — or getting it right but implementing it badly — can leave you worse off.

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How Newshams Tax Advisers Can Help

At Newshams, we specialise in helping landlords and property investors navigate the complexities of UK property taxation. We can:

• Review your current portfolio and personal tax position to determine whether incorporation makes sense for you
• Calculate the CGT and SDLT costs of transferring existing properties
• Structure your limited company optimally for tax efficiency
• Advise on salary vs dividend strategies
• Handle the incorporation and ongoing compliance
• Provide Stamp Duty Land Tax (SDLT) advice on property acquisitions and transfers

If you'd like tailored advice on whether a buy-to-let limited company is right for you, arrange a consultation with Simon Newsham CTA — a Chartered Tax Adviser with over 30 years' experience in UK property taxation.

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This article is for general information only and does not constitute tax advice. Tax rules change frequently, and the information above reflects the position as at July 2026. You should not act or refrain from acting on the basis of this information without taking professional advice tailored to your specific circumstances.