Post Complete - Professional SDLT Review Service
Specialist SDLT review service for conveyancing law firms. PI-backed, fully managed, from £50 per personal transaction.
SDLT Support for Conveyancers & Solicitors
Stamp duty calculations have become increasingly complex. With mandatory HMRC tax adviser registration from 18 May 2026, accurate SDLT advice has never been more important for your practice.
Key Statistics
- £17.1bn SDLT collected 2023/24 (HMRC)
- 1.1m Transactions filed annually
- 5% Additional property surcharge (from October 2024)
- £42m+ In SDLT penalties issued 2023/24
The SDLT Challenges Conveyancers Face
- Complex Surcharge Rules: The 5% additional property surcharge (increased from 3% in October 2024) requires careful assessment of worldwide property holdings, trust interests, and replacement residence rules.
- Time Pressure at Completion: SDLT calculations often happen under time pressure with clients pushing for exchange.
- Documentation Requirements: HMRC enquiries can come up to 4 years after filing - or 20 years for suspected deliberate underpayment.
- Regulatory Expectations Rising: Mandatory HMRC tax adviser registration from 18 May 2026 means firms filing SDLT returns must register.
Frequently Asked Questions
- Do I need to register as a tax adviser to submit SDLT returns?
- From 18 May 2026, yes. The Finance (No. 2) Bill requires professionals who submit SDLT returns on behalf of clients to register with HMRC as tax advisers.
- What happens if I calculate SDLT incorrectly for a client?
- Incorrect SDLT calculations can result in HMRC enquiries, penalties for underpayment (typically 30-100% of the underpaid tax), interest charges, and potential professional negligence claims.
- How does the 5% additional property surcharge work?
- The surcharge applies when a purchaser will own two or more residential properties after completion, unless they're replacing their main residence within 36 months.
SDLT Support for Mortgage Brokers
Property tax affects every mortgage transaction. Understanding SDLT implications helps you serve clients better and identify potential issues early in the process.
Key Information
- 5% Additional property surcharge affects buy-to-let purchases (from October 2024)
- £125,000 Nil-rate band for standard residential purchases
- £425,000 First-time buyer relief threshold
- Non-resident buyers pay an additional 2% surcharge
SDLT Support for Estate Agents
Help your clients understand the true cost of their property purchase. SDLT can add tens of thousands to transaction costs.
Why SDLT Matters for Estate Agents
- Buyers need accurate cost calculations to make informed decisions
- Additional property surcharge (5% from October 2024) affects investors and second-home buyers
- First-time buyer relief can save clients up to £6,250
- Mixed-use properties may qualify for lower non-residential rates
SDLT Support for Financial Advisers
Property taxation is increasingly complex. Support your clients with accurate SDLT guidance as part of comprehensive financial planning.
Key Considerations
- Buy-to-let investors: 5% additional property surcharge applies from October 2024
- Portfolio landlords: Multiple property purchases may be linked transactions
- Non-UK residents: Additional 2% surcharge on residential purchases
- Company purchases: 15% rate applies to properties over £500,000
SDLT Support for Property Auctions
Auction purchases require fast, accurate SDLT calculations. We provide same-day assessments to meet tight completion deadlines.
Auction-Specific Considerations
- 28-day completion deadlines require rapid SDLT assessment
- Mixed-use lots may qualify for lower non-residential rates
- Multiple lot purchases may be treated as linked transactions
- Commercial properties have different SDLT thresholds and rates
Stamp Duty Land Tax (SDLT) - England & Northern Ireland
SDLT applies to property purchases in England and Northern Ireland. Rates changed significantly in October 2024 with the additional property surcharge increasing from 3% to 5%.
Current SDLT Rates (Residential)
- Up to £250,000: 0% (standard) | 5% (additional property)
- £250,001 to £925,000: 5% | 10% (additional property)
- £925,001 to £1.5m: 10% | 15% (additional property)
- Over £1.5m: 12% | 17% (additional property)
First-Time Buyer Relief
First-time buyers benefit from a £425,000 nil-rate band on properties up to £625,000, providing savings of up to £6,250.
Additional Property Surcharge
The 5% surcharge applies when you already own residential property and are buying another. You may reclaim it if you sell your previous main residence within 36 months.
Land and Buildings Transaction Tax (LBTT) - Scotland
LBTT is Scotland's property tax, administered by Revenue Scotland since 2015. With a 6% Additional Dwelling Supplement - the highest in the UK - getting the calculation right matters.
Current LBTT Rates (Residential)
- Up to £145,000: 0% | 6% (with ADS)
- £145,001 to £250,000: 2% | 8% (with ADS)
- £250,001 to £325,000: 5% | 11% (with ADS)
- £325,001 to £750,000: 10% | 16% (with ADS)
- Over £750,000: 12% | 18% (with ADS)
Key Differences from SDLT
- 6% Additional Dwelling Supplement (higher than England's 5%)
- 30-day filing window (vs 14 days for SDLT)
- 18-month ADS reclaim window (vs 36 months for SDLT)
- First-time buyer relief raises nil-rate to £175,000 (max saving £600)
Land Transaction Tax (LTT) - Wales
LTT is the Welsh property tax, administered by the Welsh Revenue Authority. Notably, Wales is the only UK nation without first-time buyer relief on residential property.
Current LTT Rates (Residential)
- Up to £225,000: 0% | 4% (higher rates)
- £225,001 to £400,000: 6% | 10% (higher rates)
- £400,001 to £750,000: 7.5% | 11.5% (higher rates)
- £750,001 to £1.5m: 10% | 14% (higher rates)
- Over £1.5m: 12% | 16% (higher rates)
Key Differences from SDLT
- No first-time buyer relief - All purchasers pay the same rates
- 4% higher rates surcharge (lower than England's 5% and Scotland's 6%)
- Higher starting threshold (£225,000) but steeper subsequent rates
- 30-day filing deadline with Welsh Revenue Authority