Standard House Transaction SDLT
How stamp duty land tax applies to freehold house purchases — from exchange to completion, worked examples, and chain transactions.
Key Takeaways
- SDLT on a freehold house purchase is calculated on the purchase price using the same progressive rate bands as leasehold — there is no difference for standard purchases
- The effective date (when SDLT becomes due) is completion day, not exchange — exchange commits you legally but does not trigger tax
- Substantial performance can bring the effective date forward: paying 90%+ of the price or taking possession triggers SDLT even before formal completion
- In a property chain, each transaction is independent — your SDLT is calculated only on your own purchase price
- The 14-day filing deadline runs from the effective date; your solicitor handles payment but you remain legally responsible for accuracy
- A standard buyer purchasing a £400,000 freehold house pays £10,000 SDLT; a first-time buyer on the same property pays £5,000
- If the purchase falls through before completion or substantial performance, no SDLT is due and any early payment can be reclaimed
- Additional dwelling surcharge of 5% applies at all price bands if you already own another property on completion day
In this article
Freehold vs Leasehold: SDLT Differences
When you buy a freehold house, you own both the building and the land outright. A leasehold purchase means you own the property for a defined period under a lease. For the purposes of standard property purchase SDLT, the rate bands are identical — there is no freehold premium or leasehold discount.
The key distinction emerges only when a brand-new lease is created. In that situation, SDLT may also apply to the Net Present Value of ground rent payments. This does not affect freehold houses or assignments of existing leases at all. See our leasehold flat purchase guide for a detailed explanation of the NPV calculation.
Freehold House Purchase: SDLT Simplified
For the vast majority of freehold house purchases, SDLT is calculated on the purchase price alone using the standard rate bands. No NPV calculation, no lease premium analysis — just the price you paid applied to the relevant bands.
How SDLT Applies to a House Purchase
Stamp Duty Land Tax (SDLT) is a progressive tax, meaning each band is taxed at its own rate rather than the entire purchase price at the rate corresponding to the total. Use our stamp duty calculator to get an instant figure for your specific purchase price.
Your SDLT liability depends on three things: the purchase price, your buyer status (first-time buyer, standard, or additional property), and your residency status. The current England SDLT rates show the full band structure.
SDLT is self-assessed — you (via your solicitor) calculate and declare what you owe. HMRC does not send you a bill. Missing the deadline or underpaying incurs automatic penalties and interest.
Exchange vs Completion: The Critical Difference
Many buyers confuse the two key milestones of a house purchase. Understanding when each occurs — and which one triggers SDLT — is essential for planning your finances.
Exchange of Contracts
Both parties sign and swap contracts simultaneously. The sale becomes legally binding and you pay a deposit (typically 10%). If you pull out after exchange, you forfeit the deposit. However, exchange does not trigger SDLT — no tax is due at this point.
Completion
The balance of the purchase price is transferred, legal ownership passes to you, and you receive the keys. This is the effective date for SDLT purposes — the 14-day filing clock starts here. Your solicitor pays HMRC from your completion funds within 14 days.
Why This Matters for Budgeting
Exchange and completion can be simultaneous (same-day) or months apart. SDLT is only due at completion. If you exchange in December but complete in March, your SDLT is due in March. Budget your funds accordingly — the SDLT must come from your own resources, not the mortgage.
Learn more about when stamp duty must be paid and what happens if you miss the deadline.
Substantial Performance Explained
The concept of substantial performance is a lesser-known but important SDLT trigger. It means the effective date for SDLT can be brought forward before formal legal completion if certain thresholds are crossed.
Substantial performance occurs when either:
- The buyer pays 90% or more of the purchase price (or other consideration)
- The buyer takes possession of the property — whether as owner or tenant — before completion
When substantial performance happens, the SDLT effective date moves to that point, starting the 14-day filing clock immediately. This most commonly arises in arrangements where a buyer moves in early on a licence to occupy, or when a large deposit or payment is made before formal completion.
Practical Example of Substantial Performance
If you pay a 95% deposit before completion (unusual but possible in some transactions) or your seller allows you to move in before completion day, SDLT becomes due at that earlier point — not at the later formal completion. Your solicitor must file the SDLT return within 14 days of substantial performance.
Current SDLT Rate Bands (Post-April 2025)
These are the standard SDLT rates for residential property purchases in England and Northern Ireland. Scotland and Wales have their own separate taxes (LBTT and LTT respectively).
Standard Buyer Rates
| Property Price Band | Standard Rate | FTB Rate | Additional Dwelling |
|---|---|---|---|
| Up to £125,000 | 0% | 0% | 5% |
| £125,001 to £250,000 | 2% | 0%* | 7% |
| £250,001 to £300,000 | 5% | 0%* | 10% |
| £300,001 to £500,000 | 5% | 5%* | 10% |
| £500,001 to £925,000 | 5% | 5% | 10% |
| £925,001 to £1,500,000 | 10% | 10% | 15% |
| Above £1,500,000 | 12% | 12% | 17% |
*FTB relief: 0% up to £300,000; 5% on £300,001-£500,000. Only available on properties up to £500,000. FTB rates above £500,000 are the same as standard rates.
Worked Examples
Example 1: £250,000 Freehold House
| Band | Rate | Amount in Band | Tax |
|---|---|---|---|
| £0 – £125,000 | 0% | £125,000 | £0 |
| £125,001 – £250,000 | 2% | £125,000 | £2,500 |
| Total SDLT (standard buyer) | £2,500 | ||
First-time buyer on £250,000 pays £0 (nil rate up to £300,000). Additional dwelling buyer pays £12,500 (£250,000 × 5%).
Example 2: £400,000 Freehold House
| Band | Rate | Amount in Band | Tax |
|---|---|---|---|
| £0 – £125,000 | 0% | £125,000 | £0 |
| £125,001 – £250,000 | 2% | £125,000 | £2,500 |
| £250,001 – £400,000 | 5% | £150,000 | £7,500 |
| Total SDLT (standard buyer) | £10,000 | ||
First-time buyer on £400,000 pays £5,000 (0% up to £300k, 5% on £300,001-£400,000 = £5,000). Additional dwelling buyer pays £30,000 (full 5% surcharge at all bands).
Example 3: £750,000 Freehold House
| Band | Rate | Amount in Band | Tax |
|---|---|---|---|
| £0 – £125,000 | 0% | £125,000 | £0 |
| £125,001 – £250,000 | 2% | £125,000 | £2,500 |
| £250,001 – £750,000 | 5% | £500,000 | £25,000 |
| Total SDLT (standard buyer) | £27,500 | ||
This buyer pays an effective rate of 3.67% on the £750,000 purchase price. An additional dwelling buyer pays £65,000 (adding 5% at every band).
Property Chains and SDLT
Most freehold house purchases in England form part of a property chain: the seller is buying somewhere else, the people they are buying from are also buying, and so on. This affects the practical timing of your SDLT payment but not the calculation method.
Each Transaction is Independent
Your SDLT is calculated only on the price you pay for your property. Your seller's purchase is entirely separate. If the chain involves five households, five independent SDLT calculations apply — one per transaction, based on each property's individual purchase price.
Chain Breaks and Your SDLT
If a chain collapses and a transaction does not complete, SDLT is only due on those transactions that did complete. If your purchase completed before learning another part of the chain broke, your SDLT is still due within 14 days of your own completion.
Simultaneous Exchange and Completion
In chain transactions, all parties typically exchange and complete on the same day to avoid anyone being legally committed without the chain working. This means the SDLT effective date is the same for all parties, and your 14-day clock starts on that shared completion day.
The Additional Dwelling Surcharge in Chains
If you are selling your current home and buying a new one, the additional dwelling surcharge (5%) does not apply — provided your sale completes on the same day or before your purchase. If your purchase completes before your sale, the surcharge applies but can be reclaimed once you sell within three years. See our guide to the additional dwelling surcharge for the reclaim process.
Your Solicitor's Role in SDLT
In almost every freehold house purchase, your conveyancing solicitor manages the entire SDLT process. You will not need to contact HMRC directly.
- Completion statement: Your solicitor prepares a financial statement before completion showing the purchase price, your deposit, mortgage advance, SDLT due, and their fees. You transfer the balance to your solicitor, including the SDLT amount.
- SDLT1 return: Your solicitor files the SDLT return (form SDLT1) electronically with HMRC within 14 days of completion, declaring the transaction details and tax due.
- Payment to HMRC: Your solicitor transfers the SDLT payment to HMRC from your funds.
- SDLT5 certificate: HMRC issues an SDLT5 certificate confirming payment. Your solicitor then submits this to the Land Registry as part of registering your ownership.
You Remain Legally Responsible
Although your solicitor handles the filing, the legal responsibility for the accuracy of the SDLT return rests with you as the buyer. Ensure you tell your solicitor accurately whether you already own any other residential property anywhere in the world — this affects whether the additional dwelling surcharge applies.
If the Purchase Falls Through
SDLT is only due when a transaction reaches completion or substantial performance. If your purchase collapses at any earlier stage, no tax is payable.
Before exchange
No SDLT, no deposit loss, no legal penalty — just aborted costs (survey, searches, solicitor fees).
After exchange, before completion
No SDLT, but you forfeit your deposit (typically 10%) and may face a damages claim from the seller. If the seller pulls out, you can pursue them for breach of contract.
After completion
SDLT is due and cannot be avoided even if the transaction subsequently unwinds. The 14-day clock runs from the completion date.
SDLT Planning Tips for House Buyers
Understanding SDLT in advance helps you negotiate better, budget accurately, and avoid expensive mistakes.
- Calculate before you offer: Know your SDLT bill before agreeing a purchase price. Our stamp duty calculator gives an instant estimate. Factor this into your total budget alongside the deposit, legal fees, survey, and moving costs.
- First-time buyer status: Confirm whether you (and any joint buyers) qualify for first-time buyer relief before exchanging. If any joint buyer has previously owned property, relief does not apply to the full purchase — even if the other buyer is a genuine FTB.
- Selling simultaneously: If selling your current home, coordinate exchange and completion carefully to avoid the additional dwelling surcharge. Work with your solicitor to confirm the sequence of transactions.
- Budget separately from the mortgage: Lenders do not include SDLT in mortgage calculations. The tax must come from your own funds. On a £400,000 purchase, this is £10,000 you need in addition to your deposit.
- Check the effective date carefully: If there is any risk of substantial performance before formal completion, discuss with your solicitor to ensure the SDLT return is filed within 14 days of that earlier date.
Calculate Your Stamp Duty
Use our calculator to work out the exact stamp duty for your property purchase.
Your Results
Stamp Duty to Pay
£5,000
Effective tax rate: 1.67%
Tax Breakdown
| Band | Rate | Tax |
|---|---|---|
| £0 - £125,000 | 0% | £0 |
| £125,001 - £250,000 | 2% | £2,500 |
| £250,001 - £300,000 | 5% | £2,500 |
| Total | £5,000 | |
£0 - £125,000
0%
£0
£125,001 - £250,000
2%
£2,500
£250,001 - £300,000
5%
£2,500
Total
£5,000
Tax by Band
Added to 25-Year Mortgage
£29/month
Based on 5% interest rate, added to loan amount
Frequently Asked Questions
When does stamp duty become due on a freehold house purchase?
SDLT becomes due at the effective date, normally completion day. However, substantial performance (paying 90%+ of the price or taking possession) can trigger an earlier effective date before formal completion, starting the 14-day clock from that point.
Is stamp duty different for freehold vs leasehold?
Standard rate bands are identical. The difference arises only on new lease grants, where SDLT may also apply to the net present value of ground rent. For a freehold house, only the purchase price determines your SDLT.
What happens to stamp duty if my property chain collapses?
If your own transaction does not complete, no SDLT is due. SDLT only applies when your purchase completes. Chain breaks affecting other parties do not affect your SDLT obligation if your own purchase has already completed.
Can I include stamp duty in my mortgage?
No. Mortgage lenders only lend against the property value, not transaction costs. SDLT must be paid from your own funds. Budget for it separately alongside your deposit, legal fees, and survey costs.
Does the additional dwelling surcharge apply if I'm selling my current home?
If your old home sells on the same day or before your new purchase completes, the 5% surcharge does not apply. If your new purchase completes first, the surcharge applies but you can reclaim it once you sell your previous main residence within three years.
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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 Stamp Duty Calculator to help buyers understand the complex world of property transaction taxes.