Is it worth renting out a house? What UK landlords need to know

Whether renting out a house is worth it comes down to the net return after costs and tax, not the headline rent. In 2026 that calculation is tighter than it was five years ago, because higher mortgage rates, the Section 24 tax change, and the compliance demands of the Renters’ Rights Act have all raised the cost of being a landlord. For anyone weighing it up, whether you have inherited a house, are moving home and thinking about letting the old one, or are buying specifically to let, the honest test is the same: model the real numbers before you decide, not a back-of-envelope yield.

What rental income can a house earn?

Gross rental income is the easy part to estimate. Compare similar properties in the same area on Rightmove and Zoopla to see the achievable monthly rent, then express it as an annual yield against the property’s value with the August rental yield calculator. Rental demand remains strong across most of the UK, with around a fifth of households in England renting privately, which supports occupancy in areas with genuine tenant demand.

The number that decides whether letting is worth it, though, is net income, not gross rent. The gap between the two is where most first-time landlords are caught out, because the costs that sit between gross rent and take-home profit are larger and less predictable than they expect.

The costs of renting out a house

The costs that erode a headline yield fall into a predictable set, and budgeting for them honestly is the difference between a realistic decision and an optimistic one.

The mortgage is usually the largest. If you are letting a home you currently live in, your lender may grant a short-term consent to let, typically up to around twelve months, but longer-term letting normally requires a buy-to-let mortgage or a remortgage, which is priced higher than a residential loan. Safety and compliance certificates are a legal requirement, not an optional extra: a gas safety certificate is renewed annually (roughly £60 to £120), an EICR is needed every five years (roughly £150 to £300), and an EPC lasts ten years (roughly £60 to £120), with working smoke and carbon monoxide alarms fitted and tested. Specialist landlord insurance, which a standard home policy does not replace, typically runs to £200 to £500 a year. Maintenance and repairs are worth budgeting at 5 to 10 per cent of annual rent, more for an older property or an ageing boiler. Void periods between tenancies are normal, so allow for one to two months of lost rent a year as a conservative figure. Finally, management has a cost whether you pay for it or not: a letting agent charges around 10 to 15 per cent of rent for full management, and self-managing instead takes real time, typically a few hours a month per property with spikes around renewals, inspections, and repairs.

Tax: what catches new landlords out

Rental profit is added to your other income and taxed at your marginal rate, and the rule that most surprises new landlords is Section 24. Mortgage interest is no longer a deductible expense. Instead you are taxed on rental profit before finance costs and then given a 20 per cent tax credit on the interest. For a basic-rate taxpayer the effect is broadly neutral, but for a higher-rate taxpayer it is materially worse than the pre-2017 position, and because the relief is applied after profit is calculated, the higher reported profit can pull some landlords into the higher-rate band who were previously below it.

This is why net yield has to be worked out after tax, not before. Model your realistic after-tax return with the August rental income tax calculator, and for the full picture of bands, allowances, and what you can deduct, see our guide to how rental income is taxed in the UK.

The regulatory reality in 2026

The Renters’ Rights Act came into force on 1 May 2026 and changed the regulatory environment a new landlord is stepping into. Fixed-term assured shorthold tenancies have been abolished and all tenancies are now periodic. Section 21 no-fault evictions are gone, so recovering possession means relying on a statutory Section 8 ground, which involves a court process if the tenant does not leave voluntarily. The ease of exit that many landlords once relied on no longer exists, which matters if you are letting a property you may want back.

Landlords also have to meet the Decent Homes Standard, comply with Awaab’s Law on damp and mould, and register on the Private Rented Sector Database. Energy efficiency rules are tightening too, with reform of EPCs underway and a proposed higher minimum standard for let property, so a home rated below C may need investment to stay lettable. None of this makes letting unviable, but it does add cost and obligation that belong in the decision. Your core legal responsibilities as a landlord are set out on gov.uk.

Renting out a house for the first time

Most first-time landlords arrive at the decision in one of three ways: they have inherited a property, they are moving and considering letting the home they already own, or they are buying specifically to let. The financial test is the same in each case, but the practical starting point differs. If you are letting a former home, the first calls are to your mortgage lender about consent to let or a buy-to-let switch, and to your insurer, because letting without telling either can invalidate your cover. If you are buying to let, the numbers should be run before you offer, not after.

Across the landlords we work with at August, the ones who are glad they let are almost always the ones who ran the after-tax numbers and budgeted for voids and compliance before committing, while the ones who regret it underestimated exactly those costs. The legal and practical to-do list is genuinely manageable for a first letting, and our checklist for accidental landlords sets out the steps in order so nothing compliance-related is missed.

Is it worth being a landlord in 2026?

For a property owned outright, with strong local rental demand and a landlord who takes compliance seriously, renting out a house remains a worthwhile source of income and long-term capital growth. A mortgage-free house earning £13,000 a year in rent against £3,000 of running costs nets a real return that few other assets match for a hands-on investor, and property gives you a tangible asset and direct control over the decisions that drive that return.

For a highly leveraged property in a lower-yield area, held by a higher-rate taxpayer, the arithmetic is genuinely hard. The combination of Section 24 and higher mortgage rates means a number of landlords in this position run a positive gross cash flow but a negative return after tax. The honest dividing lines are leverage, the owner’s tax band, and the local yield, and being a landlord is an active investment rather than passive income, so the time commitment counts too. If the decision is really about whether to keep the property at all, our guide to selling or renting out a property weighs the disposal side, including the capital gains position on a sale.

The compliance burden is the part most new landlords worry about, and it is the part a system handles best. August keeps the certificates, deadlines, and records for each property in one place, so the obligations that make landlording feel heavy become routine rather than a source of risk. You can see how that works in the compliance checklist.

Frequently asked questions

Is renting out a house worth it in 2026? 

It is worth it where the net return after costs and tax compares well against the alternative use of the capital, which is most often the case for mortgage-free or low-leverage properties in areas with strong tenant demand. It is far more marginal for highly leveraged properties held by higher-rate taxpayers, where Section 24 and mortgage costs can turn a gross profit into an after-tax loss.

How much does it cost to rent out a house? 

Beyond any mortgage, budget for landlord insurance (around £200 to £500 a year), compliance certificates (gas, EICR, and EPC), maintenance at 5 to 10 per cent of rent, one to two months of void allowance, and either agent fees of 10 to 15 per cent or your own time to self-manage.

Do I need a buy-to-let mortgage to rent out my house? 

Usually, yes, for anything beyond a short-term arrangement. Lenders may grant a consent to let for around twelve months, but ongoing letting normally requires a buy-to-let mortgage or remortgage, and letting without your lender’s agreement can breach your mortgage terms.

Is it better to sell or rent out my house? 

That depends on whether you value ongoing income and future capital growth over releasing the capital now, and on the capital gains position when you eventually sell. You can start for free and model the rental numbers before you decide either way.

Disclaimer: This article is intended for general informational purposes only and does not constitute legal, financial, or professional advice. Landlord and tenant law is subject to change, and the information in this article reflects the position at the time of writing. You should always seek independent legal or professional advice before taking any action in relation to your property or tenancy.