Why does SDLT make buy-to-let so expensive in 2026?

Since October 2024, the additional property SDLT surcharge in England was raised from 3% to 5%, adding it to every standard band. On a £300,000 property, a buy-to-let investor now pays approximately £20,000 in SDLT - versus £5,000 for a standard residential buyer. Non-UK residents pay an additional 2% surcharge on top. This upfront friction cost significantly raises the breakeven appreciation needed to beat an ETF.

What is Section 24 and how does it affect higher-rate taxpayer landlords?

Section 24 of the Finance Act 2015, fully phased in since April 2020, removed the ability to deduct mortgage interest as a business expense. Instead, all landlords receive a 20% tax credit on finance costs - equal to what a basic-rate taxpayer would have received anyway. For higher-rate (40%) and additional-rate (45%) taxpayers, this means they now pay tax on profit calculated before interest, making highly leveraged properties loss-making after tax even with positive cash flow before tax.

Which UK cities have the best buy-to-let yields in 2026?

Northern English cities lead gross yield rankings: Newcastle upon Tyne (9.7%), Leeds (9.6%), Liverpool (7.0%), Birmingham (6.0-6.7%), and Manchester (6.0%). By contrast, London gross yields have fallen to 4-5% in most zones, making the capital extremely difficult to justify purely on yield grounds for buy-to-let investors. The North-South yield gap reflects lower entry prices in the North, with comparable or even higher rental demand from a younger, renting demographic.

Should a Gulf-based UK expat return to buy property?

A Gulf-based UK expat buying UK property faces the worst of all worlds: they pay the 2% non-UK resident SDLT surcharge on purchase, are taxed on UK rental income (which counts toward their UK income for tax purposes), and face a higher CGT rate on disposal (18% or 24% from October 2024) with no access to letting relief. Before committing, compare the after-tax cash-on-cash return from this calculator against the ETF comparison line - for higher-rate taxpayers in high-yield Northern cities, the numbers may justify it, but for London properties they rarely do.

UK Buy-to-Let Calculator - Does Property Beat a 7% ETF

Total Cash Required at Completion

Gross Yield

Market gross: rent / price

Net Yield

After all running costs (pre-tax)

After-Tax Cash-on-Cash

Net CF / cash invested

// 01. Region & Buyer Type

Region

Property Status

Buyer Residency

Stamp Duty
Additional properties (buy-to-let, second homes) pay standard residential bands PLUS a 5% surcharge on every band (raised from 3% in October 2024). Effective rates: 5% (£0-£125k), 7% (£125k-£250k), 10% (£250k-£925k), 15% (£925k-£1.5M), 17% above.

CGT on disposal (2026):
Residential property: 18% (gains within basic-rate band) / 24% (above). No letting relief unless you lived in the property. SDLT, legal fees, survey costs, and selling costs are all deductible from the taxable gain - this calculator applies them. Non-UK residents must file a 60-day CGT return after completion.

// 02. Purchase & Finance

Property Price (£)

Mortgage financing

Total Cash Required at Completion

Deposit + Stamp Duty + legal + survey

// 03. Rental & Tax

Monthly Rent (£)

Income Tax Band

Management Fee: 12%

Maintenance Reserve: 12%

Void Rate: 8%

ETF Comparison Rate: 7.0%

Hold Period: 10 years

Taxable Income Before Gain (£)

For basic-rate: 18% on gains within basic band, 24% above. Leave 0 to assume all gains taxed at higher CGT rate.

// Property total wealth vs ETF at 7% p.a. - 10yr hold - four growth scenarios

ETF at 7% p.a. Property: no growth (0%) Property: UK 20yr avg (3.4%) Property: above average (5%) Property: 7% (2x UK avg)

Sale price required to beat ETF (after exit costs)

Enter your figures above to see the breakeven sale price and required annual appreciation.

Gross Yield (market)

Net Yield (pre-tax)

After-Tax COC Return

Annual Tax Bill

// What-if Scenarios

Four property price growth scenarios compared against your ETF alternative. Each shows total wealth at end of hold period: sale proceeds (net of CGT and 2% exit costs) plus all rental cash flow. CGT is calculated on the taxable gain after deducting SDLT, legal fees, survey costs, and selling costs. For basic-rate taxpayers, CGT is blended: 18% on gains within the basic-rate band, 24% above.

Scenario	Property value	Total wealth	Return on cash	vs ETF
Enter figures above

// Acquisition Costs

Item	Amount
Enter figures above

// Annual Running Costs

Item	Per Year
Enter figures above

// Analysis

Enter your figures above to generate a personalised buy-to-let analysis.

// UK BTL Market Intelligence - 2026

Long-Run Price Growth

~4-5% per annum national average (Halifax HPI 40yr). London has led historically but Northern cities now show stronger rental yields with lower entry prices.

Best BTL Yields (Gross)

Newcastle 9.7% - Leeds 9.6% - Liverpool 7.0% - Birmingham 6.0-6.7% - Manchester 6.0%. London typically 4-5% gross - rarely viable for income-focused BTL after Section 24.

Market Liquidity

Higher than GCC - typical completion 8-12 weeks. Autumn and spring are peak transaction periods. Scotland's conveyancing system differs; LBTT return due within 30 days of settlement.

Key Risk

Section 24 mortgage interest restriction hits higher-rate taxpayers hardest. A 40% taxpayer with a 75% LTV mortgage on a low-yield property may show negative post-tax cash flow even with 6% gross yield.

Watch Point

Renters Reform Act (2025): no-fault evictions abolished in England. Longer void periods possible while repossession goes via court. Scotland already has similar protections under Housing (Scotland) Act 2014.

Non-UK Expat Note

Gulf-based UK expats: +2% SDLT surcharge on purchase. UK rental income taxable via self-assessment. CGT return within 60 days of sale. Consider whether Non-Resident Landlord Scheme (NRLS) applies.

Stamp Duty

Since October 2024, the additional dwelling surcharge in England was raised from 3% to 5%. On a £350,000 property, a buy-to-let buyer now pays approximately £25,000 in stamp duty - nearly five times what a first-time buyer would pay. Non-UK residents add another 2% on top of every band.

This calculator computes stamp duty precisely using the tiered band structure, then adds it to your total acquisition cost. Scotland uses LBTT (Land and Buildings Transaction Tax) plus ADS (Additional Dwelling Supplement) at 8% of the full purchase price.

Section 24 and the tax trap

Before April 2020, landlords could deduct mortgage interest in full as a business expense. Section 24 abolished this, replacing it with a flat 20% tax credit on finance costs - regardless of your marginal rate. A 40% taxpayer effectively pays an extra 20% tax on their interest cost.

This calculator models tax correctly: rental income minus deductible expenses (management, maintenance, insurance, void allowance) equals taxable profit - mortgage interest is NOT deducted here, but you receive a 20% credit after computing your tax bill. For highly leveraged higher-rate taxpayers, the after-tax cash-on-cash return can be sharply negative even with healthy gross yields.

Note: This is a simplified Section 24 estimate. HMRC's full calculation limits the 20% credit to the lower of finance costs, property business profits, and adjusted total income. It cannot create a refund, and unused finance costs may carry forward. For edge cases (very low profit or very high interest), this calculator may overstate the tax credit.

How the ETF comparison works

Your total cash invested at year zero - deposit plus all acquisition costs for a mortgage purchase, or full price plus friction for cash - is placed into both scenarios simultaneously. The ETF line grows at the rate you choose, compounding annually (7% reflects VWRA's long-run expectation net of 0.22% TER).

The property line tracks your equity at zero price appreciation: equity = (purchase price minus outstanding loan) plus cumulative after-tax net cash flow. If property equity cannot match the ETF portfolio even at zero growth, the property needs price appreciation to justify the commitment - and the verdict panel tells you exactly how much.

ETF comparison note: The ETF line and property chart lines are shown pre-CGT for a like-for-like comparison. The verdict and what-if tables deduct property CGT but leave the ETF CGT-free, as if the ETF were held in an ISA or SIPP wrapper. For a taxable GIA comparison, ETF CGT would also reduce the ETF terminal value.

Understanding breakeven appreciation

The verdict panel solves for the sale price that makes your property portfolio exactly as large as the ETF portfolio at your chosen hold period - after deducting CGT (calculated on the gain net of SDLT, legal fees, survey costs, and selling costs) and 2% estate agent and legal exit costs.

If that price requires 5% annual appreciation or less, the property is arguably viable - UK national prices have compounded at ~4-5% per annum over 40 years. Requiring 7-8%+ means the property is betting on above-average regional outperformance, which concentrates risk in a single illiquid asset versus a globally diversified ETF.

Does UK buy-to-let beat
a 7% ETF?

How the numbers work

Stamp Duty

Section 24 and the tax trap

How the ETF comparison works

Understanding breakeven appreciation

Frequently Asked Questions

Why does SDLT make buy-to-let so expensive in 2026?

What is Section 24 and how does it affect higher-rate taxpayer landlords?

Which UK cities offer the best buy-to-let yields in 2026?

Should a Gulf-based UK expat return to buy buy-to-let property?