Buy-to-Let (BTL)
The UK's most popular property investment strategy — buy and hold for rental income.
What is it?
Buy-to-let means purchasing a residential property and renting it out to generate monthly income. You're effectively becoming a landlord. Most investors use a specialist BTL mortgage (75% LTV, meaning a 25% deposit), and the rent must comfortably cover the mortgage plus running costs.
Who is it for?
BTL suits investors who want steady, predictable income rather than quick capital gains. It's best for those comfortable with being a landlord or paying a letting agent, and who have a 5+ year horizon.
Pros
- ✓Monthly rental income provides predictable cashflow
- ✓Long-term capital growth tends to outperform inflation
- ✓Leverage amplifies returns on invested capital
- ✓Lettable assets can be refinanced to release equity over time
- ✓Well-understood by lenders — many BTL mortgage products available
Cons
- ✗Section 24 tax changes hit higher-rate taxpayers holding property personally
- ✗Stamp duty surcharge adds 5% to purchase costs
- ✗Void periods and maintenance can erode returns significantly
- ✗EPC regulations (C rating required from 2028) may require costly upgrades
- ✗Rising mortgage rates have squeezed cashflow across the board
Numbers that matter
Annual rent ÷ purchase price. Below 5% is usually hard to make work with today's mortgage rates.
Rent must cover 125% of mortgage at 7% stress rate. This is the lender's key test.
After management (10%), voids (5%), maintenance (5%), insurance. Gross minus ~25% is a rough guide.
Rent minus mortgage, management, insurance, maintenance. Negative cashflow properties need strong growth to compensate.
Common pitfalls
- !Buying in a low-yield area because 'it's a nice place' — yields drive cashflow, sentiment doesn't
- !Underestimating void periods — budget for 1–2 months per year minimum
- !Ignoring EPC ratings — a D or E property bought today may be unlettable by 2028
- !Holding in your own name when you're a higher-rate taxpayer (Section 24 makes this painful)
- !Not stress-testing at 7% mortgage rates — many deals only work at sub-4% rates
UK-specific notes
- 5% SDLT surcharge on all investment property purchases (3% for properties under £40,000)
- Section 24 means mortgage interest is only a 20% tax credit for personal ownership — limited company structures are increasingly popular
- Mandatory EPC C target for rented property from 2028 (new tenancies first)
- Section 21 'no-fault eviction' has been abolished — understand the Renters Reform implications
- Scotland and Wales have devolved tenancy laws — different deposit and eviction rules apply
How PropScout helps
PropScout scores every listing on BTL potential — calculating gross yield, DSCR at 3.91% and 7% stress, monthly cashflow, and MEES risk. Filter the deal feed to show only BTL deals and sort by yield to find the best opportunities across the UK.
See BTL deals →PropScout provides educational content only. Nothing here constitutes financial, tax, or legal advice. Always consult a qualified professional before making investment decisions.