Property Portfolio Stamp Duty Strategy: Multi-Property Planning
Every additional property you purchase attracts a 5% SDLT surcharge. With MDR abolished and corporate rates changing, strategic timing and structure planning can save tens of thousands across a growing portfolio.
Key Takeaways
- •Every property after the first attracts the 5% surcharge (from 31 Oct 2024)
- •Multiple Dwellings Relief abolished 1 June 2024, with no discount for bulk purchases
- •Corporate 17% flat rate applies to companies buying residential over £500k (from 31 Oct 2024)
- •Buying 6+ residential properties in one transaction may qualify for non-residential rates
- •Commercial property purchases never attract the residential surcharge
- •Sequencing, specifically when you buy and in what order, materially affects your total SDLT bill
The 5% Surcharge on Every Additional Property
From 31 October 2024, the additional dwelling surcharge is 5% of the full purchase price (applied on top of standard rates). This applies from the second residential property onwards, whether you are buying BTL, a holiday home, or a second main home.
For a portfolio investor buying at £250,000 per property: the first property costs £3,750 in SDLT (standard rate). Every subsequent property costs £18,750, a surcharge cost of £15,000 per additional property compared to the standard rate.
| Property # | SDLT at £200k | SDLT at £250k | SDLT at £350k | SDLT at £500k |
|---|---|---|---|---|
| 1st (main home rate) | £1,500 | £2,500 | £7,500 | £15,000 |
| 2nd (+ 5% surcharge) | £11,500 | £15,000 | £25,000 | £40,000 |
| 3rd (+ 5% surcharge) | £11,500 | £15,000 | £25,000 | £40,000 |
| 4th (+ 5% surcharge) | £11,500 | £15,000 | £25,000 | £40,000 |
| 5th (+ 5% surcharge) | £11,500 | £15,000 | £25,000 | £40,000 |
| Total (5 properties) | £47,500 | £62,500 | £107,500 | £175,000 |
Portfolio SDLT Planner
Estimate the total SDLT bill across your portfolio and see how much of it is attributable to the surcharge.
Portfolio SDLT Planner
Total SDLT (portfolio)
£32,500
Of which: surcharge
£25,000
Avg SDLT per property
£10,833
Assumes first property at main-home rate, all subsequent at +5% surcharge. Post April 2025 bands.
Timing Strategies
Replace your main residence before buying investments
If you are upsizing your main home at the same time as building your portfolio, always complete the main home purchase first. You pay standard SDLT on the main home. If you buy the investment property first, you own two properties when you subsequently buy your new main home, which triggers the 5% surcharge on that purchase too.
The 36-month refund window
If you buy a new main home before selling the old one, you pay the 5% surcharge at completion. You have 36 months from completion to sell the previous main home and claim a full refund of the surcharge. This applies only to main residence replacement. BTL purchases are never eligible for refund.
Spacing purchases across tax years
While SDLT itself has no annual limit, spacing purchases helps manage income tax on rental profits and CGT on disposals. Higher-rate taxpayers benefit from keeping total income in a single year below the threshold for the 45% additional rate. Holding income-generating properties in an SPV or spreading purchases can achieve this.
Six-or-more dwelling rule
If you buy six or more residential properties in a single transaction, section 116(7) of the Finance Act 2003 treats them as non-residential automatically, so the 0%/2%/5% rates apply with no surcharge. There is no election. On six properties at £200,000 each (£1.2m total), non-residential SDLT is £49,500, against £63,750 at standard residential rates or £123,750 with the 5% surcharge. It requires a genuine single transaction, not six separate purchases. The rule came under scrutiny in September 2026 over the six-dwelling rule and the Providence House sale.
When to Switch to a Limited Company
The company route is commonly considered from 4+ properties for higher-rate taxpayers. The key tax advantages are deductible mortgage interest and corporation tax rates (19 to 25%) versus personal rates up to 45%. However, the SDLT position for companies changed significantly on 31 October 2024.
| Purchase Price | Personal (5% surcharge) | Company (<£500k: same) | Company (>£500k: 17%) |
|---|---|---|---|
| £250,000 | £18,750 | £18,750 | N/A |
| £400,000 | £30,000 | £30,000 | N/A |
| £500,000 | £40,000 | £40,000 | £85,000 |
| £600,000 | £52,500 | £52,500 | £102,000 |
| £750,000 | £68,750 | £68,750 | £127,500 |
| £1,000,000 | £93,750 | £93,750 | £170,000 |
Buying through a company? The rates are different
Companies pay the 5% surcharge on homes, and a flat 17% above £500,000 unless a relief applies.
MDR Abolished: What It Means for Portfolio Buyers
Multiple Dwellings Relief (MDR) allowed buyers purchasing two or more residential properties in a single transaction to average the SDLT across all properties and apply the minimum 1% rate. It was a significant relief for bulk portfolio purchases.
MDR was abolished for transactions with an effective date on or after 1 June 2024. Contracts exchanged on or before 6 March 2024 could still claim MDR transitionally, regardless of when they completed, provided the contract was not varied and the rights under it were not assigned after that date. Contracts exchanged after 6 March 2024 kept MDR only where the transaction completed or was substantially performed before 1 June 2024.
The practical impact: buying two £300,000 properties in the same bargain (£600,000 total) previously attracted SDLT calculated on the average price of £300,000 under MDR, giving £20,000 per dwelling and £40,000 in total. Without MDR the linked transaction rules apply instead, so the rate is set by the combined £600,000 and then apportioned. That produces a bill of £50,000, not two separate £20,000 charges.
Commercial vs Residential Diversification
Adding commercial property to a residential portfolio has a significant SDLT advantage: no 5% additional dwelling surcharge. Commercial SDLT uses non-residential rates: 0% on the first £150,000, 2% on £150,001 to £250,000, and 5% above £250,000, with no surcharge regardless of how many residential properties you already own.
| Price | Residential BTL (5%) | Commercial | Saving |
|---|---|---|---|
| £200,000 | £13,500 | £3,500 | £10,000 |
| £300,000 | £20,000 | £7,500 | £12,500 |
| £500,000 | £40,000 | £14,500 | £25,500 |
| £750,000 | £68,750 | £27,000 | £41,750 |
Commercial SDLT: 0% to £150k, 2% £150k-£250k, 5% above £250k. No surcharge. SDLT leases attract additional SDLT on net present value of rent.
Refinancing and Portfolio Restructuring
Refinancing an existing property (replacing one mortgage with another on the same property) does not trigger SDLT. You only pay SDLT on acquisition (transfer of title). Releasing equity through remortgage to fund a new purchase is therefore SDLT-neutral on the existing property, though the new purchase will attract SDLT normally.
Transferring existing personally-owned properties into a limited company does trigger SDLT if there is any consideration, and the company is a connected party, so market value rules apply. The company will pay SDLT at residential rates (plus 5% surcharge or 17% flat rate over £500k) on the deemed market value. See our company vs personal comparison page for full analysis.
Frequently Asked Questions
Is there a stamp duty discount for buying multiple properties?
Multiple Dwellings Relief was abolished for transactions with an effective date on or after 1 June 2024, and only contracts exchanged on or before 6 March 2024 still qualify. There is no longer a discount for buying multiple residential properties simultaneously. The only exception is the six-or-more dwelling rule, which applies non-residential SDLT rates (no surcharge) automatically when six or more residential properties are bought in a single transaction.
Does the order I buy properties in affect my total SDLT?
Yes, significantly. If your main home is the first property you buy, you pay standard rates on it. All subsequent investment properties pay 5% surcharge. If you buy an investment property first and are already a homeowner, you pay the 5% surcharge on the second home too. The sequencing of your main home purchase relative to investment purchases materially affects the total bill.
Can I avoid SDLT by gifting properties to family members?
Gifting a property to an adult family member (e.g., child) avoids SDLT if there is no consideration (no money paid and no mortgage assumed). However, if the property has an outstanding mortgage and the recipient takes it on, SDLT applies on the mortgage value assumed. Gifts to family members also have CGT implications for the donor (treated as disposal at market value) and potential IHT implications if within 7 years of death.
Reviewed by
Julie White
ACASDLT Expert since 1999Stamp Duty Land Tax Specialist
ACA and Tax Adviser with a career spanning nearly four decades, specialising in SDLT planning and advisory work since 1999.