How To Avoid Paying Unnecessary Tax On Rental Income

Most Landlords Overpay Their Tax

Tax on rental income is charged on your profit, not your rent. That sounds obvious until you notice how many landlords quietly treat the two as the same thing, add up everything that landed in the account, and hand over a slice of the lot. Profit is what is left after you take off the costs of running the property, and those costs are almost always larger, and more numerous, than people remember by the time the return is due.

Paying less tax is not about being clever. There is a widespread belief that avoiding tax on rental income involves something offshore, complicated and faintly dodgy. In practice it usually involves a spreadsheet, shoebox or biro, and remembering that landlord insurance is an expense you are allowed to claim. Every legitimate cost you fail to deduct inflates your profit on paper, and you then pay real tax on money you never actually made.

This article is about the deductions landlords miss, the difference between a repair and an improvement (the single most expensive misunderstanding in property tax), the reliefs that quietly get left on the table, and the rules that have changed while everyone was busy chasing rent. It is written for the 2026/27 tax year and applies whether you have one flat or a portfolio. These are the tax tips for landlords that actually move the needle, and the goal is simple: help you protect your rental yields by making sure you never hand over a penny more than you owe.

First, The Rule Everything Hangs On: Wholly And Exclusively

Before any list of what you can claim, there is one rule sitting underneath all of it. To be deductible from your rental income, an expense must be incurred wholly and exclusively for the purposes of the property business. That is the wholly and exclusively rule, and it is the test HMRC applies to everything.

In plain terms, the cost has to exist because you let the property. If it would have happened anyway, it is not allowable. Repairing the boiler in your rental flat passes the test. Repairing the boiler in your own home does not, however much you would like it to.

Where it gets more nuanced is dual-purpose costs, the ones that are part business and part personal. You can claim a cost, or part of a cost, only where a definite part of it is incurred wholly and exclusively for the letting. Phone calls are the everyday example. The calls you make about the property, to tenants, agents and tradesmen, are allowable, but your private calls are not. Buy a vacuum cleaner you also run round your own house and there is no identifiable business part, so none of it can be claimed. Buy cleaning products purely for the rental and the whole cost qualifies.

We go into how to handle these mixed personal and business splits properly in our guide to private use adjustments, which is worth a read if your phone, car or home office does double duty.

SCCS tax clinic note: The wholly and exclusively rule is not there to catch you out. It is there to separate genuine business costs from personal ones. If you can look at an expense and honestly say “I only paid this because I rent the property out,” it is almost certainly allowable. If you have to squint, get advice before you claim it.

What Actually Counts As An Allowable Expense

Plenty. This is where most of the underclaiming happens, because landlords remember the big obvious costs and forget the steady drip of smaller ones that add up over a year. Here are the everyday running costs you can deduct from your rental income:

• Letting agent and property management fees, including tenant-finding, rent collection and inventory costs
• Landlord insurance: buildings, contents, public liability, and rent guarantee or loss-of-rent cover
• Ground rent and service charges on leasehold properties
• Council tax and utilities during void periods, or wherever you as landlord are responsible for them
• Repairs and maintenance that keep the property in its existing condition (much more on this next)
• Accountancy fees for preparing your rental accounts and property tax return
• Advertising and marketing to find tenants
• Legal and professional fees for revenue matters, such as renewing a short lease or dealing with a tenancy dispute. Fees for buying the property are capital, not allowable here
• Direct running costs such as business phone calls and stationery, plus the business proportion of your vehicle running costs

HMRC’s own guidance on working out your rental income sets all of this out, but the guidance is a lot easier to read once you already know what you are looking for.

SCCS tax clinic note: The single most common cause of an inflated tax bill we see is not one enormous missed cost. It is a whole year of small allowable expenses nobody wrote down. A safety certificate here, an advert there, the odd repair paid in cash. Individually forgettable. Collectively, they can be the difference between a tax bill you grumble at and one you resent.

Repairs vs Improvements: The Distinction That Costs The Most

If you learn one thing from this article, make it this. HMRC draws a hard line between a repair and an improvement, and the two are taxed completely differently. This is capital improvements versus repairs, and it catches out more landlords than anything else in property tax.

A repair restores the property to its original condition. Replacing a broken boiler with a modern equivalent, fixing a leaking roof, repainting, swapping a knackered carpet for a similar new one. These are revenue expenses, and you deduct them from your rental income in the year you pay them.

An improvement makes the property better than it was. An extension, a loft conversion or adding an en-suite that was not there before. These are capital expenses. You cannot deduct them from your rental income at all. Instead they get added to the property’s base cost and offset against Capital Gains Tax if and when you sell. Same money out of your pocket, a completely different, and much slower, tax benefit.

The line is not always obvious. HMRC accepts that replacing something with the nearest modern equivalent is still a repair, even if the new version is technically better, as long as the improvement is incidental. Swapping a single-glazed window for a double-glazed one is the textbook example. You are not obliged to hunt down a 1970s window to keep it a repair.

This is the distinction landlords get wrong most often, and it costs money in both directions. Treat an improvement as a repair and you underpay your tax now, which HMRC will notice. Miss the capital cost altogether and you overpay Capital Gains Tax when you sell.

A £6,700 Lesson In Keeping Your Receipts

We had a client who had run a Victorian terrace in Stourbridge as a rental for the best part of twenty years and prided himself on managing the lot himself, on a handshake and a roll of cash. Over that time he added a rear kitchen extension, converted the loft into a bedroom, replaced the single-glazed windows with double glazing, and swapped out a dead boiler. Every contractor was paid in cash, and every invoice vanished into a drawer, if it survived at all.

He had bought the place for £150,000 back in 2007, and when he decided to sell he found a buyer at £250,000. A tidy £100,000 gain, he reckoned, with a move to Spain to spend it on. He came to us to file the Capital Gains Tax return and the problems surfaced quickly.

The extension and the loft conversion were genuinely capital costs, worth around £28,000 between them, and should have come straight off his gain. But capital spending has to be proved, and ‘I definitely paid someone cash for that’ is not a figure you can put on a tax return. With no invoices, HMRC would not allow a penny.

The windows and the boiler were a separate problem. Those were revenue repairs, worn parts swapped for their modern equivalents, and should have been claimed against his rental income year by year to cut his Income Tax. According to his wife, he had never once put the window replacement through on a tax return, and by the time he reached us those years were well gone.

There was nothing we could do that long after the event. He paid roughly £6,700 more in Capital Gains Tax than he needed to if he had just kept receipts. Spain happened. Just with a smaller budget than planned.

SCCS tax clinic note: Two habits keep you out of this situation. Claim your repairs against rental income in the year you pay for them, while the relief is still there to take. And keep every invoice for capital work somewhere you can still find it in ten years, because when you sell, those costs only cut your Capital Gains Tax if you can prove them. A builder’s word down the pub twenty years later is not evidence HMRC accepts.

The Deductions Landlords Routinely Leave Behind

Beyond the obvious, these are the ones that quietly go unclaimed year after year.

Landlord insurance. All of it. Not just buildings cover, but contents, public liability, and rent guarantee policies too. If it is a genuine landlord policy, the premium is allowable.

Licensing fees. If your property sits in a selective or additional licensing scheme, which several councils across the West Midlands now operate, the licence fee is a fully deductible revenue expense. Statutory licensing costs are exactly the kind of thing landlords pay, sigh about, and then forget to claim.

Professional subscriptions. Membership of a recognised landlord association, where it genuinely supports your letting business, is allowable.

Use of home. If you run your property business from a desk at home, a reasonable proportion of your household costs can be claimed. It is rarely a fortune, but it is rarely nothing either.

Pre-letting costs. Some expenses incurred before your first tenant moved in can be claimed, within limits, provided they would have been allowable during the letting. Worth checking if you have recently brought a property to market.

SCCS tax clinic note: We have taken on landlords who had been letting for years and had never once claimed their insurance, their licensing fees, or the mileage they racked up driving back and forth to the property, simply because nobody had told them they could. There is often little to be done about years already filed and out of time, but there is everything to be done about this year and next. Reliefs are only worth having if you actually claim them.

Whatever Happened To The Wear And Tear Allowance?

It left. This one still trips people up.

The old wear and tear allowance, which let landlords of furnished properties deduct a flat 10% of rent, was abolished back in April 2016. It was quietly retired the best part of a decade ago, and yet landlords still cite it with the confidence of someone convinced Woolworths is about to reopen.

What replaced it is the “replacement of domestic items” relief, and it works differently. Instead of a flat percentage, you claim the actual cost of replacing domestic items provided for your tenants: sofas, beds, carpets, curtains, white goods, crockery and the like. The catches are worth knowing. It has to be a replacement, not the initial purchase when you first furnish the property. It has to be broadly like-for-like, so if you upgrade to something fancier, relief is limited to the cost of an equivalent item. And it applies whether the property is furnished, part-furnished or unfurnished, which surprises a lot of landlords.

Don’t Forget The Miles

Running a rental property means driving to it. Inspections, repairs, meeting the agent, trips to the merchant for materials, the drive to hand over keys. Those business miles are claimable, and they add up faster than landlords expect.

You can claim the business proportion of your motoring using HMRC’s simplified mileage rate, which increased from 45p to 55p per mile for the first 10,000 business miles from 6 April 2026, the first rise in 15 years. Take a landlord with a couple of terraces in Dudley and a flat in Wolverhampton, forever criss-crossing the Black Country to deal with tenants and tradesmen. Those journeys, properly logged, turn into a genuine deduction.

We covered the new 55p rate, and exactly what a mileage log needs to survive an HMRC question, in our breakdown of the mileage rate increase. The same record-keeping discipline applies to property travel: date, journey, purpose, miles.

SCCS tax clinic note: A quick word of caution. If you claim the flat mileage rate, you cannot also claim actual running costs like fuel, servicing and insurance for the same vehicle, and you cannot claim capital allowances on it. It is one method or the other. For most landlords the simplified rate is easier and often the better deal, but it is worth a five-minute check rather than an assumption.

Mortgage Interest: The Deduction That Isn’t Any More

This is the big one, and the source of more overpaid and misunderstood tax than almost anything else in property.

If you own your rental property personally, you can no longer deduct your mortgage interest from your rental income. For years, landlords deducted their interest, filed their return and slept soundly. Then Section 24 arrived, phased itself in between 2017 and 2020 with all the fanfare of a software update nobody asked for, and quietly rewrote the maths for every mortgaged landlord in the country.

Here is how it works now. Instead of deducting interest as an expense, individual landlords get a tax reduction worth 20% of their finance costs. For a basic-rate taxpayer, that broadly lands in the same place as the old system. For a higher-rate taxpayer, it does not, and the tax bill can be noticeably heavier than it once was.

One important exception: this restriction does not apply to properties held in a limited company. Companies can still deduct their mortgage interest in full against rental profits. That is one reason some landlords look at incorporating, though it is a decision with Stamp Duty, Capital Gains Tax and running-cost consequences of its own.

SCCS tax clinic note: Incorporating a property portfolio is not a magic bullet, and it is not right for everyone. The interest relief looks attractive on paper, but moving properties into a company can trigger Stamp Duty Land Tax and a Capital Gains Tax charge on the way in, on top of ongoing company costs. Sometimes it is the right move. Sometimes it is an expensive one. This is firmly a “get proper advice before you do anything” decision.

And Now It’s Quarterly: Making Tax Digital

A change that is live right now, so it earns a mention.

From 6 April 2026, Making Tax Digital for Income Tax applies to landlords whose gross income from property and self-employment combined was over £50,000 in the 2024/25 tax year. HMRC, it seems, has decided that once a year is no longer sufficient quality time together. If you are in scope, the annual tax return gives way to keeping digital records and sending HMRC quarterly updates, followed by a final declaration.

The threshold drops to £30,000 from April 2027 and £20,000 from April 2028, so even if this year’s figure keeps you out, it is worth getting your record-keeping in order now. Properties held in a limited company sit outside Making Tax Digital for Income Tax entirely.

There is a silver lining. Landlords who keep proper digital records tend to claim more, because the expenses that used to vanish into a shoebox now get captured as they happen. Good records are not just a compliance chore. They are how you stop overpaying.

Common Mistakes To Avoid

The rules reward attention and punish assumptions. Here are the ones that catch landlords out most often.

Confusing repairs with improvements. The big one. A new kitchen of similar standard is a repair. A brand new extension is capital. Mix the two up and your tax is wrong in one direction or the other.

Still believing in the wear and tear allowance. It has been gone since 2016. If your figures still quietly include a 10% flat deduction, they are out of date.

Deducting the full mortgage payment. If you own personally, you cannot deduct mortgage interest as an expense, and you never could deduct the capital repayment. Both are common errors.

Forgetting the small stuff. Insurance, licensing fees, accountancy, mileage, advertising. None of them individually will change your life. Together, unclaimed, they inflate your tax bill every single year.

Keeping records that would not survive a question. “Repairs, roughly £2,000” is not a record. HMRC expects dates, amounts and evidence, and expects you to keep it for at least five years after the filing deadline.

SCCS tax clinic note: A pattern we see a lot: a landlord who does everything right during the year, keeps every receipt, then treats a capital improvement as a repair because it felt like one at the time. Knocking two rooms into one is not the same as replacing a broken cupboard door. When a job is large, or changes the character of the property, that is the moment to check which side of the line it falls on, before you file.

When To Speak To An Accountant

A lot of rental tax is manageable on your own. Log the income, claim the obvious costs, file the return. For plenty of landlords with a single property, that genuinely is the job.

But property tax has a habit of hiding its complexity. The repairs-versus-improvements line, the interest restriction, the replacement of domestic items relief, the mileage method, whether incorporation makes sense, and now quarterly reporting under Making Tax Digital. Any one of these, handled wrong, can quietly cost you more than a year of accountancy fees.

Good accounting for property is not about finding loopholes. It is about making sure every legitimate deduction is claimed, every capital cost is recorded for the day you sell, and nothing that should reduce your bill gets left behind. When people ask how to find a good accountant, the honest answer is: find one who knows property specifically, and who tells you about a relief before you have spent three years not claiming it.

If you own rental property in the West Midlands, or anywhere else, and you are not completely sure your position is as clean as it could be, speak to us. We will tell you in plain English what you are claiming, what you are missing, and what, if anything, needs fixing. Get in touch with SCCS Accountants and we will take a proper look.

Your Action Checklist

• Work out your taxable profit as rental income minus allowable expenses, not just the rent you banked
• List every allowable running cost: management fees, landlord insurance, licensing, ground rent, service charges, repairs, accountancy, advertising
• Separate genuine repairs from capital improvements, and file the improvement invoices safely for the day you sell
• Claim the replacement of domestic items relief on like-for-like replacements, and stop applying the old wear and tear allowance
• Log your business mileage and claim it at the new 55p rate
• Check how your mortgage interest is being treated: a 20% tax reduction if you own personally, a full deduction if held in a company
• If your gross property and self-employment income tops £50,000, get ready for quarterly Making Tax Digital reporting
• Keep every receipt, invoice and record for at least five years after the filing deadline
• If any of this raises a question you would rather not guess at, speak to SCCS Accountants

FAQs On Rental Income Tax

How do I avoid paying tax on rental income?

Legally, you cannot avoid tax on genuine rental profit, but you can absolutely stop overpaying. Rental tax is charged on profit, not rent, so the way to reduce your bill is to claim every allowable expense you are entitled to: management fees, landlord insurance, repairs, licensing, accountancy, mileage and more. Most landlords who overpay do so by missing deductions, not by anything they did wrong.

Can I deduct my mortgage payments from my rental income?

Not in the way you might expect. If you own the property personally, you cannot deduct mortgage interest as an expense. Instead you get a tax reduction worth 20% of your finance costs. You have never been able to deduct the capital repayment part of the mortgage. Properties held in a limited company are treated differently and can still deduct interest in full.

Is a new kitchen a repair or an improvement?

It depends. Replacing a kitchen with one of a similar standard is usually a repair, and deductible from your rental income. Ripping out a basic kitchen and fitting a significantly higher-spec, luxury one is an improvement, which is capital and set against Capital Gains Tax when you sell instead. The standard and character of the work is what matters, not simply the cost.

Do I still get the wear and tear allowance?

No. The wear and tear allowance was abolished in April 2016. It has been replaced by the replacement of domestic items relief, which lets you claim the actual cost of replacing furniture, appliances and similar items provided for your tenants, on a like-for-like basis.

Can I claim mileage for visiting my rental property?

Yes. Trips to your property for inspections, repairs, agent meetings and similar business reasons are claimable. From 6 April 2026 the simplified rate is 55p per mile for the first 10,000 business miles. Keep a proper log of dates, journeys, purpose and miles.

What expenses can landlords claim?

The everyday running costs of letting: letting and property management fees, landlord insurance, ground rent and service charges, repairs and maintenance, accountancy fees, advertising, licensing fees, professional subscriptions, business phone calls, and your business mileage. The test is always whether the cost was incurred wholly and exclusively for the letting.

Do I need to worry about Making Tax Digital?

If your combined gross income from property and self-employment was over £50,000 in 2024/25, then yes, Making Tax Digital for Income Tax applies to you from 6 April 2026, meaning digital records and quarterly updates. The threshold falls to £30,000 in 2027 and £20,000 in 2028. Properties held through a limited company are outside these rules.

How do I find a good accountant for property tax?

Look for one who understands property specifically, not just general tax. A good accountant for landlords keeps on top of changes like the interest restriction and Making Tax Digital, makes sure you claim every allowable expense, and records your capital costs for the day you sell. If you would like that from SCCS Accountants, we are happy to review your position.

Disclaimer

This article is for general information only and does not constitute tax, accounting or financial advice. Tax rules can change and the correct treatment depends on your circumstances. Always seek tailored advice before making decisions or changing how your business processes expenses.

SCCS Accountants Ltd