Buy to Let Guide UK — Is It Worth It in 2026?
Buy-to-let has changed dramatically since the tax reforms of 2017–2020. Higher stamp duty, restricted mortgage interest relief, and rising rates have squeezed margins. But for the right property in the right area, it can still be a solid long-term investment. Here is the honest picture.
How Buy to Let Works
You buy a property with a buy-to-let mortgage, find tenants, collect rent, and (hopefully) benefit from long-term capital growth. The rent covers the mortgage and costs, and the property appreciates over time.
In practice, it is a business. You need to understand the numbers before committing.
The Numbers: What You Need
| Requirement | Details |
|---|---|
| Deposit | Minimum 25% (most lenders). Some accept 20% at higher rates. |
| Mortgage rate | Typically 1–1.5% higher than residential. Expect 5–6% for a 2-year fix in 2026. |
| Rental coverage | Rent must be 125–145% of the mortgage payment (lender stress test). |
| Stamp Duty | Standard rates PLUS 3% surcharge on every band. A £250,000 BTL costs £10,000 in stamp duty. |
| Minimum income | Many lenders require £25,000+ personal income alongside the rental income. |
Tax on Buy-to-Let Income
Rental income is taxed as income at your marginal rate (20%, 40%, or 45%). The big change since 2020: you can no longer deduct mortgage interest as an expense. Instead, you get a 20% tax credit on your interest payments. This hits higher-rate taxpayers hardest.
Example: £1,000/month rent, £600/month mortgage interest
Basic rate taxpayer: Tax on £12,000 rent = £2,400. Tax credit (20% of £7,200 interest) = £1,440. Net tax: £960.
Higher rate taxpayer: Tax on £12,000 rent = £4,800. Tax credit (20% of £7,200 interest) = £1,440. Net tax: £3,360. Significantly more than before the rules changed.
You also pay Capital Gains Taxwhen you sell: 18% (basic rate) or 24% (higher rate) on the profit, after your annual CGT allowance (£3,000 in 2026/27).
Understanding Rental Yield
Gross yield= (Annual rent ÷ Property price) × 100. A £200,000 property renting for £900/month has a gross yield of 5.4%.
Net yieldfactors in mortgage payments, insurance, maintenance, void periods, letting agent fees, and tax. The net yield is usually 2–3% lower than gross. If your net yield is below 2%, the investment may not be worth the hassle.
Rule of thumb: Look for gross yields of 5%+ outside London. In London, yields are typically 3–4% but capital growth potential is higher. The best BTL areas in 2026 include parts of the North West, North East, and Midlands where prices are lower and rents are strong relative to purchase price.
Running Costs to Budget For
| Cost | Typical amount |
|---|---|
| Letting agent | 8–15% of rent (full management) |
| Landlord insurance | £200 – £400/year |
| Maintenance | Budget 1% of property value per year |
| Void periods | Budget 1 month per year empty |
| Gas safety certificate | £60 – £90/year |
| EICR (electrical) | £150 – £300 every 5 years |
| EPC certificate | £60 – £120 every 10 years |
Legal Requirements for Landlords
EPC rating of C or above — Required for new tenancies from 2028 (currently E minimum). Plan upgrades now.
Right to Rent checks — You must verify tenants have the legal right to rent in England.
Deposit protection — Deposits must be placed in a government-approved scheme within 30 days.
Gas and electrical safety — Annual gas safety check and EICR every 5 years, both mandatory.
Smoke and CO alarms — Required on every floor. Carbon monoxide alarms in rooms with fuel-burning appliances.
How to Rent guide — You must provide tenants with the latest government “How to Rent” booklet.
Should You Use a Limited Company?
Buying through a limited company means you pay Corporation Tax (25%) instead of income tax, and you CAN still deduct mortgage interest as a business expense. This is more tax-efficient for higher-rate taxpayers and portfolio landlords.
The downsides: mortgage rates for limited companies are typically 0.5–1% higher, accounting costs add up, and extracting profits via dividends triggers additional tax. Speak to a specialist property accountant before deciding.
Is Buy to Let Still Worth It?
It depends on your numbers. BTL still works if: you buy in a high-yield area, you have a 25%+ deposit, you plan to hold long-term (10+ years), and you treat it as a business. It does not work if: you are relying on capital growth alone, your cash flow is negative after all costs, or you do not have reserves for void periods and repairs.
The days of easy BTL profits are over. But disciplined landlords with good properties in strong rental areas can still achieve 5–8% total returns (rental income plus capital growth) over the long term.
Calculate your buy-to-let mortgage costs with our free Mortgage Calculator and check your stamp duty with the Stamp Duty Calculator on CalcPad. Remember to tick the additional property box.
Last updated May 2026. This guide is for general information only. Always seek advice from a qualified financial adviser and property tax specialist.