Main Residence: Stamp Duty Definition
Your main residence is your primary home for stamp duty purposes. It determines whether the higher rates surcharge applies when you buy a new property — and whether you can claim a refund after selling your old home.
Last verified: April 2026 | Source: GOV.UK
Key Takeaways
- •Main residence is determined by a facts-based test — there is no single statutory definition.
- •A married couple or civil partnership can only have one main residence between them for SDLT purposes.
- •If you sell your old main residence within 36 months of buying a new one, you can claim a higher rates refund.
- •If your old home sells before you complete your new purchase, higher rates do not apply at all.
- •The order of sale and completion matters — buying first then selling triggers higher rates temporarily.
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What Is Main Residence
For SDLT purposes, your main residence is the property where you live as your primary and only home. It is sometimes referred to as your "only or main residence" or "principal residence."
There is no statutory definition — HMRC applies a facts-based test, looking at the totality of how and where you live. If you own only one property, it is your main residence by default.
Indicators of Main Residence
HMRC considers a range of factors when determining which property is your main residence. These include:
- •Where you sleep most nights
- •Where your post and correspondence is sent
- •Where you are registered with a GP
- •Where your children go to school
- •Where you work
- •Where you are registered to vote
No single indicator is decisive. HMRC weighs the overall picture. If you own two properties but only use one regularly as a home, that is typically your main residence. A rarely-visited second home or investment property would not qualify.
Connection to Higher Rates
The main residence concept is central to the higher rates surcharge. The key question at completion is: are you replacing your main residence, or are you acquiring an additional property?
- •No higher rates: you are buying a property to replace your only or main residence, and you have already sold (or sell on the same day) your previous main residence
- •Higher rates apply initially: you buy before selling your old main residence — you temporarily own two properties
- •Higher rates always apply: you are buying a genuine additional property (second home, buy-to-let) with no intention of it replacing your main residence
Replacing Your Main Residence
If you are buying a property to use as your new main residence, higher rates do not apply provided your previous main residence has already been sold before or on the same day as completion.
The 3-year rule also provides a window: if you sold a previous main residence within the last 3 years and are now buying a new one, higher rates do not apply — you are treated as still "replacing" your former main residence.
Selling After Buying: The Refund
If you complete your new main residence purchase before selling your old one, you will own two properties at completion and the higher rates will apply. However, if you sell your previous main residence within 36 months, you can claim a refund of the higher rate portion.
Decision flowchart
Buying a new home?
Do you own another residential property at completion?
Yes
Higher rates apply
Is the other property your old main residence — sold within 36 months?
Yes
Claim a refund within 12 months of selling the old home
The refund must be claimed from HMRC within 12 months of the date of the sale of your previous main home (or within 12 months of the filing date of the original SDLT return, if later).
Married Couples and Civil Partners
For SDLT purposes, married couples and civil partners are treated as a single unit for the higher rates test. They can only have one main residence between them.
If one spouse is replacing their main residence but the other still owns a separate property, the couple's overall position is assessed together. This means the couple will pay higher rates until the old main residence is sold (and then claim a refund), even if only one spouse owns the additional property.
Official Government Source
For official HMRC guidance on main residence and the higher rates:
Frequently Asked Questions
What counts as your main residence for stamp duty?
For SDLT purposes, your main residence is the property where you live as your primary home. HMRC applies a facts-based test: indicators include where you sleep, work, have your post sent, where your children go to school, and where you are registered with a GP. There is no single statutory definition.
Why does main residence matter for stamp duty?
Your main residence status is central to the higher rates surcharge. If you are buying a replacement main residence (your previous home was sold before or within 36 months of the new purchase), you do not pay the higher rates. If you buy before selling, you temporarily own two properties and must pay higher rates — but can claim a refund once you sell the old one within 3 years.
Can married couples have two main residences?
No. For SDLT purposes, a married couple or civil partnership is treated as a unit and can only have one main residence between them. If one spouse is replacing their main residence but the other still owns another property, the couple's position is assessed together.
In this article
Emma Richardson, MRICS
Chartered Surveyor & Property Tax Specialist
Emma Richardson is a RICS-qualified Chartered Surveyor with over 12 years of experience in UK property taxation. She founded Calculate My Stamp Duty UK to help buyers understand the complex world of property transaction taxes.