Buy-to-let has been one of the most popular ways to build wealth in the UK for decades. But tax changes, rising costs, and stricter lending rules have made it harder to profit. This guide covers how buy-to-let works, what it really costs, and whether it is still worth it.
How Buy-to-Let Works
A buy-to-let mortgage lets you purchase a property specifically to rent it out. You become a landlord and collect monthly rent from your tenants.
Key Requirements
- Minimum deposit: 25% of the property value (some lenders require 30-40%)
- Interest rates: Higher than residential mortgages — typically 0.5-1.5% more
- Affordability check: Lenders usually require the rent to cover 125-145% of the mortgage payment
- Fees: Arrangement fees of £1,000-£2,500 are common
Mortgage Types for Buy-to-Let
| Type | How It Works | Best For |
|---|---|---|
| Interest-only | You pay only the interest each month. The full loan is repaid at the end. | Maximising monthly cash flow |
| Repayment | You pay interest plus some capital each month. The loan is repaid by the end. | Building equity and paying off the loan |
| Tracker | Follows the Bank of England base rate plus a margin. | Those comfortable with rate changes |
| Fixed rate | Rate stays the same for 2, 3, or 5 years. | Budgeting certainty |
Most buy-to-let landlords use interest-only mortgages to keep monthly costs low and maximise rental profit.
Rental Yield: What You Can Expect
Rental yield is the annual rental income as a percentage of the property value. It shows how much return you get from rent alone.
Calculating Rental Yield
Gross rental yield = (Annual rent / Property value) x 100
Example: A property worth £200,000 renting for £900 per month.
- Annual rent: £900 x 12 = £10,800
- Gross yield: (£10,800 / £200,000) x 100 = 5.4%
Typical Yields by Region
| Region | Average Yield | Example City |
|---|---|---|
| North East | 6-8% | Sunderland, Middlesbrough |
| North West | 5-7% | Liverpool, Manchester |
| Yorkshire | 5-7% | Leeds, Sheffield |
| Midlands | 5-6% | Birmingham, Nottingham |
| Wales | 5-6% | Cardiff, Swansea |
| South West | 4-5% | Bristol, Exeter |
| South East | 3-4.5% | Brighton, Reading |
| London | 2.5-4% | Zones 3-6 |
Higher yields are found in cheaper areas. London has low yields but historically strong capital growth.
Gross Yield vs Net Yield
Gross yield does not account for costs. Net yield subtracts mortgage interest, management fees, maintenance, insurance, and void periods.
Example: 5.4% gross yield minus 2% mortgage interest, 12% management fee, 1% maintenance, and 5% void period = roughly 2.5-3% net yield.
Always calculate net yield — it shows your real return.
The True Cost of Buy-to-Let
The purchase price is just the start. Here are all the costs you need to factor in.
Purchase Costs
| Cost | Amount |
|---|---|
| Deposit | 25-40% of property value |
| Stamp duty surcharge | 3% on top of standard rates |
| Legal fees | £1,000-£2,000 |
| Mortgage arrangement fee | £1,000-£2,500 |
| Survey/valuation | £300-£600 |
| Total purchase costs | Typically 5-7% of property value |
Example: £200,000 Property
| Cost | Amount |
|---|---|
| Deposit (25%) | £50,000 |
| Stamp duty (3% surcharge) | £6,000 |
| Legal fees | £1,500 |
| Mortgage fee | £1,500 |
| Survey | £400 |
| Total upfront cost | £59,400 |
Ongoing Annual Costs
| Cost | Typical Amount |
|---|---|
| Mortgage interest | 2-5% of loan per year |
| Letting agent fees | 10-15% of rent |
| Maintenance/repairs | 1% of property value per year |
| Landlord insurance | £150-£400 per year |
| Void periods | 1-2 months rent per year (5-8%) |
| Gas safety certificate | £60-£100 per year |
| EICR (electrical) | £150-£200 every 5 years |
| Accountant fees | £200-£500 per year |
Hidden Costs People Forget
- Furnishing: If you let furnished, budget £3,000-£8,000 upfront
- Tenant replacement: EPC certificate, cleaning, minor repairs between tenancies
- Legal costs: Evictions can cost £1,000-£5,000
- Council tax: You pay it during void periods
- Income tax: Rental income is taxed (see below)
Tax on Buy-to-Let
Tax rules for landlords have changed significantly since 2020. Here is what you need to know.
Rental Income Tax
Your rental income is added to your other income and taxed at your marginal rate:
- Basic rate (20%): Taxable income up to £50,270
- Higher rate (40%): Taxable income £50,271 to £125,140
- Additional rate (45%): Taxable income over £125,140
Example: If your salary is £45,000 and you earn £10,800 rental income, your total is £55,800. You pay 40% tax on the rental income above the threshold.
Mortgage Interest Relief
You can no longer deduct mortgage interest from your rental income before calculating tax. Instead, you get a 20% tax credit on the interest you pay.
Example:
- Annual mortgage interest: £6,000
- Tax credit at 20%: £1,200
This means higher rate taxpayers pay more tax than before 2020. A 40% taxpayer now effectively gets relief at 20% instead of 40%.
Capital Gains Tax (CGT) on Sale
When you sell a buy-to-let property, you may owe CGT on the profit:
- CGT allowance: £3,000 per year (2025-26)
- Basic rate: 18%
- Higher rate: 24%
Example: Bought for £200,000, sold for £280,000. Profit: £80,000. After £3,000 allowance, CGT at 24% (higher rate) = £18,720.
Council Tax
- You pay council tax during void periods
- Some councils charge extra for empty properties after 12 months
Pros of Buy-to-Let
Leverage
You control a £200,000 asset with a £50,000 deposit. If the property grows 5% in a year, that is £10,000 gain on your £50,000 investment — a 20% return. No other mainstream investment gives you this kind of leverage.
Tangible Asset
Property is a physical asset you can see and touch. Unlike shares, it does not disappear if a company goes bust. You can improve it to increase its value.
Rental Income
Monthly rent provides a regular income stream. In retirement, this can supplement your pension.
Capital Growth
UK property has historically grown in value over the long term. While there have been crashes (2008, early 1990s), prices have generally recovered and exceeded previous peaks.
Inflation Hedge
Rents and property values tend to rise with inflation. As the cost of living increases, so does your rental income and property value.
Cons of Buy-to-Let
Illiquid
You cannot sell a property quickly. It can take months to find a buyer and complete a sale. Your money is locked up.
Management Hassle
Being a landlord means dealing with tenants, repairs, vacancies, and regulations. Even with a letting agent, it takes time and effort. A bad tenant can cost thousands.
Tax Changes
The removal of mortgage interest relief (replaced with a 20% tax credit) hit higher rate taxpayers hard. Many landlords have seen their tax bills increase significantly.
Void Periods
Properties are not always occupied. A void period of 1-2 months per year is common. During this time, you still pay the mortgage, insurance, and council tax.
Rising Costs
Maintenance, insurance, and regulatory compliance costs have all increased. Energy efficiency requirements (minimum EPC rating of C by 2028 for new tenancies) may require expensive upgrades.
Concentration Risk
Most buy-to-let landlords own just one or two properties. If that property is in an area that declines, or sits empty for months, your entire investment is affected.
Is Buy-to-Let Still Worth It?
When It Works
- You have a large deposit. With 25-40% down, your mortgage costs are lower and you build equity faster.
- You buy in a high-yield area. Northern cities and university towns offer yields of 5-7%+.
- You plan to hold long term. 10-20+ years lets you ride out market cycles and benefit from capital growth.
- You are a basic rate taxpayer. The tax changes hurt higher rate taxpayers more.
- You enjoy being a landlord. Or you are willing to pay a letting agent to handle it.
When It Does Not Work
- You are stretching financially. If the mortgage is your biggest expense and you rely on rent to pay it, one void period or unexpected repair can cause problems.
- You are a higher rate taxpayer. The tax changes have significantly reduced profitability for higher earners.
- You want quick, liquid returns. Property is not an investment you can cash out quickly.
- You are buying in London or the South East. Yields of 2-3% barely cover costs after tax and fees.
Alternatives to Buy-to-Let
If you want property exposure without the hassle of being a landlord, consider these options.
REITs (Real Estate Investment Trusts)
REITs are companies that own and manage portfolios of properties — offices, shops, warehouses, flats. You buy shares in the REIT and receive dividends from rental income.
- Liquidity: Buy and sell like any stock
- Minimum investment: As little as £50
- Diversification: Exposure to many properties at once
- Tax: Dividends are taxed as income (use an ISA to hold them tax-free)
- No management: No tenants, repairs, or void periods
UK REITs include British Land, Land Securities, and Hammerson. You can buy them through a stocks and shares ISA or a general investment account.
Property Funds
Property funds pool investor money to buy a portfolio of UK or international properties.
- Examples: L&G UK Property Fund, Schroder Real Estate
- Minimum investment: Usually £100-£500
- Risk: Fund value fluctuates with property prices
- Fees: Typically 0.5-1.5% per year
Property Crowdfunding
Platforms like Property Partner and Crowdestate let you invest in individual properties with other investors.
- Minimum investment: Varies (£50-£10,000+)
- Returns: Rental income plus capital growth
- Risk: Less liquid, platform risk
Comparison
| Option | Hassle Level | Minimum Investment | Liquidity | Tax Efficiency |
|---|---|---|---|---|
| Buy-to-let | High | £50,000+ | Low | Low (post-2020 rules) |
| REITs | None | £50 | High | High (in ISA) |
| Property funds | None | £100-500 | Medium | Medium |
| Crowdfunding | Low | £50-10,000 | Low-medium | Varies |
Summary
- Buy-to-let can build wealth through leverage, rental income, and capital growth — but it is not the passive investment many assume.
- Budget for all costs: Stamp duty surcharge (3%), letting agent fees (10-15%), maintenance (1% per year), void periods (5-8%), and tax on rental income.
- Tax rules have changed: You cannot deduct mortgage interest from rental income. You get a 20% tax credit instead — this hurts higher rate taxpayers.
- REITs and property funds offer property exposure without the hassle, tenants, or management costs. Use an ISA for tax-free returns.
- Do the maths on net yield. A 5% gross yield can drop to 2-3% after costs and tax. Make sure the numbers work before committing.
- Consider your goals. If you want hands-on control and are prepared for the work, buy-to-let can pay off. If you want exposure to property without the hassle, REITs are the simpler choice.