Capital Gains Tax on Property: What You Need to Know Before You Sell

Selling a property can feel like a financial win. Especially if prices have risen since you bought it. But before you start calculating the profit, you need to understand how Capital Gains Tax works.

Many homeowners and landlords are surprised by how much tax can be due after a sale. Others assume they will not pay anything at all. Both assumptions can be wrong.

At Eaves & Co, we regularly advise individuals who are planning to sell property. Getting advice before you complete the sale can make a significant difference.

What Is Capital Gains Tax?

Capital Gains Tax is paid on the profit you make when you sell an asset that has increased in value.

It is not based on the sale price alone. It is based on the gain. That means the difference between what you paid for the property and what you sell it for, after allowable deductions.

Capital Gains Tax on residential property is reported to HM Revenue and Customs and, in many cases, must be declared and paid within 60 days of completion.

Do You Pay Capital Gains Tax on Your Main Home?

In many cases, no. If the property you are selling has been your main residence for the entire time you have owned it, you may qualify for Private Residence Relief. This can mean no Capital Gains Tax is due.

However, the position changes if you have rented the property out. You have used part of it for business. You have not lived there for the full ownership period, or It was your second home.

These details matter. Small changes in circumstances can affect the tax calculation.

What About Rental Properties and Buy to Lets?

If you are selling a rental property, Capital Gains Tax will usually apply. The gain is calculated by taking the sale price and deducting:

• The original purchase price.
• Stamp Duty paid when you bought it. 
• Legal fees and estate agent costs.
• Certain improvement costs.

You then deduct your annual Capital Gains Tax allowance. The remaining gain is taxed at the relevant residential property rates.

For higher rate taxpayers, this can be a significant bill.

When Do You Have to Pay?

For UK residential property, the gain must normally be reported within 60 days of completion. The tax due must also be paid within that same period. Missing this deadline can result in penalties and interest.

This catches many people out, particularly landlords who assume it can wait until their Self Assessment return.

How Can You Reduce Capital Gains Tax Legally?

There are legitimate ways to reduce your liability. Making sure all allowable costs are included is essential. Many people forget to claim improvement works or professional fees.

Timing can also matter. If you are married or in a civil partnership, transferring ownership before sale may help utilise both annual allowances.

In some cases, planning the sale around your income position can reduce the rate applied.

Early advice is key. Once the sale has completed, many planning opportunities are lost.

Why Speak to Eaves and Co Before You Sell?

Capital Gains Tax is rarely straightforward. Especially if the property has been rented, inherited, or partially used as a home and business.

We help individuals understand how much tax is likely to be due and when it needs to be paid.
We can also advise  on what can be claimed and how to structure the sale efficiently.

Selling a property is often a major financial event. The tax position should be part of the decision, not an afterthought.

Frequently Asked Questions

Do I pay Capital Gains Tax if I sell my house?
If it has been your main residence for the entire period of ownership, you may not pay any tax. If it has been rented or was a second home, tax may apply.

How much Capital Gains Tax do I pay on property?
The rate depends on your overall income and the size of the gain. Residential property gains are taxed at different rates depending on your tax band.

How long do I have to report Capital Gains Tax on property?
In most cases, you must report and pay within 60 days of completion.

Can I deduct renovation costs from Capital Gains Tax?
Improvement costs that add value to the property can usually be deducted. Routine maintenance and repairs cannot.

What happens if I do not report the gain within 60 days?
Penalties and interest can apply. It is important to act quickly if you miss the deadline.