Selling a property should feel like a win. Yet many owners hand over thousands more in tax than they need to. If you have a portfolio or even a single rental, the way you sell can make a big difference to your final number. Let’s walk through what capital gains tax is, why it bites, and three practical ways to legally reduce it. I will keep it simple and actionable, so you can decide what to do next with confidence.
First things first: what is capital gains tax
Capital gains tax, or CGT, is a tax on the profit you make when you sell an asset that has gone up in value. In this context the asset is a property. You buy it, you hold it, it appreciates, then you sell. The gain is the sale price minus your allowable costs. Your main residence usually has its own relief for the time it has been your home, which can make a sale tax free for that period. Additional properties are different. They are likely to be taxable when sold, whether you own them in your own name or through a limited company.
Why the way you own property matters
Many business owners start as accidental landlords. You inherit a property or keep a former home as a rental. Then you add a couple more over the years. Before you know it, your rentals sit alongside your salary, dividends, and interest on your self assessment. That congestion can push your overall income higher, which is important because CGT is charged at your top slice of income. The higher your income, the more of your gain is taxed at the higher CGT rate for residential property. This is one reason so many people end up paying more than they expected.
Strategy 1: Stop selling as an individual by default
If your properties sit in your personal name, their income and gains flow through your self assessment alongside everything else you earn from your business. That can push you into higher rates for both income tax and CGT, and you also miss out on full mortgage interest relief at higher rates. In contrast, a limited company pays corporation tax on profits at company rates, and you have more levers such as pension contributions paid by the company that can reduce the effective tax. The key point is not that a company is always better. It is that selling in your own name by default is often the costliest path. Run the numbers. If most of your wealth building is happening inside your business already, a ring fenced property company can keep things cleaner and more tax efficient in the long run.
Action ideas
Map where each property currently lives and model a sale in your own name versus inside a company
If you plan to keep investing, consider whether future purchases should be inside a dedicated property company
Factor in lending terms, running costs, extraction of profits, and your personal income mix
Strategy 2: Use incorporation relief to move a genuine property business into a company
If you have built a real property business with multiple rentals and ongoing activity, you may be able to transfer that business into a limited company and roll over your gains. Incorporation relief, where conditions are met, allows the gain to be held over into the shares of the company so there is no immediate personal CGT when you move across. The income then stays in the company going forward rather than landing on your personal tax return. Do keep an eye on stamp duty on the transfer. Rules have changed and some reliefs are not available now, so stamp duty can be a real cost. You also want to ensure you have enough scale and evidence of business activity to qualify. Done properly, incorporation can reset your structure and give you a cleaner base for the next phase.
Action ideas
Gather evidence that you run a business, not a passive investment: number of properties, active management, records, systems
Model the stamp duty cost of transferring properties and weigh it against the CGT and income tax savings over time
Take advice on timing and the mechanics so the hold over works as intended
Strategy 3: Use your CGT allowance and bank your capital losses
Your annual CGT allowance has been squeezed in recent years, but it still exists. Many owners forget to use it, which is like leaving money on the table. If you are planning multiple sales, pace them across tax years so you capture the allowance in each year where possible. Also check your history for capital losses. A loss from years ago can still be set against gains now as long as it was claimed properly. Unearthing an old loss can reduce today’s CGT bill in a very satisfying way. Keep good records and make sure you are not missing relief that is already yours.
Action ideas
List planned disposals and consider spreading them across tax years to use multiple allowances
Review past returns for unutilised capital losses and bring them forward where available
Keep a tidy log of purchase costs, sale costs, and improvement costs so you claim the right base cost
A quick note on main residence relief
If you are selling a property that has been your only or main residence for a period, relief can reduce or remove CGT for that qualifying time. Keep records of dates you lived there and any periods where you let the property, then confirm how the rules apply to your timeline. It is an easy win when the facts support it, and it can save a meaningful amount.
Putting it together: a simple checklist
Decide if your next sale belongs inside a company or in your own name
If you have a genuine business, explore a move into a company using incorporation relief and weigh stamp duty carefully
Use this year’s CGT allowance and plan around next year’s where timing allows
Hunt down historic losses and set them off against today’s gains
Document everything so your numbers stand up if HMRC ever asks
Final thought
Tax should never be the only driver, but it is a big part of your return. A clearer structure, smarter timing, and proper use of reliefs can keep more profit in your pocket. If you want a friendly second pair of eyes on your plan, book a call and we will walk through your options. There will be no pushy sales pitch. And if you like to do your own digging, grab a copy of our free guide, Seventy Five Ways To Pay Less Tax. It is full of ideas you can apply straight away.
