Is Buy-to-Let Still Worth It? Deal Checklist

A property can look attractive on an estate agent’s particulars and still leave its landlord with very little spare cash. The asking price and monthly rent are only the start. Before committing, you need to understand the total cash required, realistic running costs, tax position and whether the borrowing will work.

So, is buy-to-let still worth it? It can be, but the answer depends on the individual property and your circumstances. A useful starting point is to ask: would this purchase still make sense if the rent was lower, repairs were higher or refinancing cost more than expected?

Start with evidence of achievable rent

Build your assessment around rent that a tenant is likely to pay. Compare similar properties in the same area, taking account of condition, bedrooms, outdoor space, parking and transport links. Asking rents are useful evidence, but they do not prove what a property has actually let for.

Ask local letting agents for a written rental appraisal and recent comparable lettings. Find out how long properties typically take to let and which tenants are looking locally. For an occupied property, review the tenancy documents, rent schedule, payment history, arrears and deposit records with your solicitor and agent.

An advertised rent, or a seller’s promise that it could be increased, should not be treated as money already secured.

Understand the difference between yield and money left over

Gross rental yield = annual rent ÷ purchase price × 100. A £300,000 property renting for £1,500 a month has a gross yield of 6%. That is a comparison tool, but it does not deduct mortgage interest, management, repairs, empty periods, insurance or tax.

Work out the annual cash remaining after borrowing costs, running expenses and realistic reserves. Then compare that with all the cash committed to the purchase. Keep pre-tax cash flow separate from taxable profit: they are different calculations.

Worked example: a 6% yield with a much smaller cash margin

This fictional example is for a standard residential letting in England. It assumes an interest-only mortgage, a full year of scheduled rent and a separate allowance for missed rent. The 5% interest rate is an illustration, not a current mortgage quotation or an indication that finance is available.

Purchase and funding: purchase price £300,000; deposit £75,000; mortgage £225,000 at 75% loan-to-value. At 5% interest, annual mortgage interest is £11,250, or £937.50 a month. The £225,000 capital balance still needs to be repaid at the end of the term.

Illustrative annual budget:
Scheduled rent: £18,000
Mortgage interest: £11,250
Management allowance, assumed at 12% including VAT of scheduled rent: £2,160
Repairs and replacement reserve: £1,500
Void and arrears reserve, equivalent to one month’s rent: £1,500
Insurance and routine compliance allowance: £600
Cash remaining after these costs and reserves, before tax: £990 a year, or £82.50 a month.

These are planning assumptions, not typical cost quotations. Management terms vary; some charge only on collected rent. Repairs and void reserves are money set aside, rather than expenses necessarily incurred in that year. A reserve is not automatically tax deductible. Leasehold service charges, major works, ground rent where applicable, utilities or council tax during empty periods, and exceptional repairs would need adding where relevant.

The initial cash requirement is larger than the deposit: £75,000 deposit + £20,000 higher-rate Stamp Duty Land Tax + an illustrative £5,000 for legal, survey, valuation and mortgage fees + £5,000 for initial works = £105,000. Keep an additional emergency cash buffer available.

The £20,000 SDLT figure assumes a £300,000 purchase subject to standard higher rates in England or Northern Ireland, without reliefs or a non-resident surcharge. Wales and Scotland have different property transaction taxes. Your solicitor should confirm the calculation for your transaction.

On £105,000 committed, the £990 annual cash surplus after reserves represents about 0.94% before tax. This excludes changes in property value, sale costs and the additional cash buffer. It is a cash-flow illustration, not a forecast of total investment return.

Test what happens when the assumptions change

In the same example, a mortgage rate of 6% would increase annual interest by £2,250. Keeping everything else unchanged, the £990 surplus would become a £1,260 annual shortfall before tax. A rate increase would affect payments when applicable under the mortgage terms, such as after a fixed period ends.

A 10% rent reduction would cut scheduled income by £1,800. If management remained 12% and the void reserve remained one month of the reduced rent, the annual result would become a £444 shortfall before tax, assuming other costs stayed unchanged.

Also test a longer empty period, a substantial repair and a lower valuation at refinancing. Run some scenarios together. An investment that needs the highest rent, uninterrupted occupation and cheaper future borrowing has little room for error.

Check how much a lender will actually advance

Having a deposit does not guarantee that you can borrow the remainder. Buy-to-let lenders assess rental affordability, often using an interest coverage ratio and a stress interest rate. Their assessment may use a higher rate than your initial mortgage payment.

For illustration only, if a lender required 145% rental cover at a 5.5% stress rate, a £225,000 loan would need approximately £1,495 a month in rent: £225,000 × 5.5% ÷ 12 × 145%. Actual criteria depend on the lender, product, ownership structure and application.

The lender’s accepted rental valuation may differ from an agent’s estimate. Your existing portfolio, experience, credit history, property type and other commitments can also affect options. Passing a lender’s test does not establish that the investment meets your own return requirements.

Assess tax and ownership before choosing a mortgage

For individual residential landlords, mortgage interest generally does not reduce taxable rental profit in the same way as ordinary allowable running expenses. Relief for qualifying residential finance costs is restricted to a basic-rate tax reduction, subject to the relevant rules and limits.

Companies are outside that particular individual-landlord restriction, but a company is not automatically the best ownership route. Consider borrowing costs, administration, corporation tax, taking money out of the company and eventual sale. Moving an existing property into a company can itself create tax and transaction costs.

Ask your accountant to model the after-tax outcome for your circumstances and the relevant tax year, including any announced changes taking effect during your planned ownership. TLA can discuss mortgage options alongside that work; this article does not provide tax advice.

Price the property’s obligations into the deal

Check the survey, title, lease terms where relevant, planning position, permitted use and any licensing requirements. Ask about upcoming major works and whether the property can be let lawfully in its current condition. Budget for applicable safety checks, certificates and energy efficiency requirements.

In England, the main Renters’ Rights Act tenancy reforms took effect on 1 May 2026. They changed the assured tenancy framework, rent increase procedures and possession rules. Do not assume that an older tenancy template or a plan to obtain vacant possession will work unchanged. Have your agent or solicitor check the arrangements. Rules differ across the UK.

Would an HMO, multi-unit property or refurbishment improve the deal?

Potentially, but higher advertised rent can come with higher expenditure and more complex funding. Houses in multiple occupation can involve licensing, planning, fire safety, bills and additional management. Multi-unit freehold blocks and mixed-use buildings need lenders comfortable with their title and configuration.

If refurbishment is needed, confirm whether the property qualifies for a standard mortgage before relying on one. Bridging or refurbishment finance can sometimes be appropriate, but include all interest, arrangement and exit costs, a works contingency and a realistic repayment strategy. A future remortgage depends on the completed property, valuation and lender criteria; it is not guaranteed.

Your checklist before committing

1. Rental evidence: Is the rent supported by comparable lettings and local demand?
2. Total cash: Have you included deposit, purchase tax, professional fees, finance fees and initial works?
3. Running budget: Have you allowed for management, repairs, voids, insurance, compliance and property-specific charges?
4. After-tax outcome: Has your accountant reviewed the ownership structure and tax calculation?
5. Borrowing: Has a broker checked likely lender appetite and rental affordability?
6. Resilience: Can you fund a shortfall, major repair or longer empty period?
7. Exit: Can you repay the mortgage, refinance or sell without relying on optimistic assumptions?

Discuss the funding before you commit

If you are considering a buy-to-let purchase, send TLA Finance the property details, asking price, expected rent, deposit available, proposed ownership structure and any planned works. For an existing portfolio, include a schedule of properties and borrowing.

Our team can review potential funding routes and explain where lender criteria could affect your plans, including standard buy-to-let, limited company borrowing and more complex property types. Contact TLA Finance about your proposed purchase.

Your property may be repossessed if you do not keep up repayments on your mortgage or other borrowing secured on it. Most buy-to-let mortgages are not regulated by the Financial Conduct Authority.

General information checked on 9 November 2026. Figures are illustrative and exclude personal tax calculations. Lending is subject to status, valuation and lender criteria. Property values and rental income can fall.