If you’re a landlord, your “accounts” are more than a once-a-year job to get your tax return over the line. They’re what helps you keep more of what you earn, avoid expensive mistakes, and stay confident if HMRC ever asks questions.
The private rented sector is a big part of UK housing — around 19% of UK households are in the PRS — which means HMRC sees landlord returns every day. That’s good news in one sense: the rules are well-established. It’s also why the same problem areas come up again and again.
In this guide, you’ll get a clear, practical run-through of:
- what usually counts as allowable expenses (and what doesn’t)
- how to set up simple record-keeping that doesn’t take over your life
- the most common HMRC issues we see — and how you can avoid them
If you’d rather have it handled properly end-to-end, start with our Services and you’ll see the different ways we support landlords and business owners across the UK.
What HMRC expects from you (in plain English)
HMRC expects you to:
- declare your rental income correctly
- claim the right allowable expenses
- pay the correct tax by the deadline
- keep records that support the figures on your return
If you’re thinking, “I’m only renting out 1 property — surely it’s not that deep,” that’s exactly where trouble starts. Most HMRC enquiries aren’t about complex tax planning. They’re about basic things like missing income, unclear expenses, or claiming a big refurb as “repairs”.
If you’re not sure whether you even need to file, our Tax Return page covers the situations that typically trigger Self Assessment, including rental income.
Allowable expenses: what you can claim (and what catches landlords out)
A good rule of thumb is this: you can normally claim costs that are wholly and exclusively for the rental business, and that are revenue rather than capital in nature.
That last part matters. A lot.
Revenue vs capital: the difference that changes everything
- Revenue expenses are the day-to-day running costs of letting a property (often deductible against rental income).
- Capital expenses are costs that improve the property or add long-term value (usually treated differently for tax, often relevant when you sell, rather than being deducted from annual rental profits).
The most common HMRC arguments happen when landlords try to claim capital work as revenue.
The expenses landlords commonly claim (and how to keep them “HMRC-proof”)
Below are the typical categories. The key isn’t just claiming them — it’s claiming them cleanly, with evidence and sensible descriptions.
1) Letting agent and management fees
These are usually straightforward, and commonly allowable:
- let-only and tenant-find fees
- ongoing management fees
- inventory/check-in/check-out charges
- referencing/admin fees charged by the agent
Top tip: keep the agent statements. They often show income received, fees deducted, and repairs paid on your behalf — which makes your numbers far easier to reconcile.
2) Repairs and maintenance (but not improvements)
This is the big one.
In general:
- repairs keep the property in a rentable condition (often allowable)
- improvements upgrade the property beyond its original condition (often capital)
Examples of repairs that are commonly allowable:
- fixing a leak
- replacing a broken tile
- repairing a boiler
- repainting between tenants
- replacing damaged kitchen unit doors like-for-like
Examples that are more likely to be improvements/capital:
- adding an extension
- converting a loft
- fitting a brand-new kitchen where the old one was removed and the layout/spec is materially upgraded
- installing something new that wasn’t there before (for example, an extra bathroom)
Where landlords get caught out is “bundling” a whole project under one line called “maintenance”. If you’ve done a larger job, split it out properly and keep notes.
If you’re not confident about the repair vs improvement line, this is exactly where Bookkeeping Services can save you money — not just by organising the numbers, but by making sure the categorisation is defensible.
3) Replacement of domestic items (furnished properties)
If your property is furnished, you can often claim for replacing movable domestic items (beds, sofas, fridges, carpets, curtains, etc.) under the replacement of domestic items rules.
The key word is “replacing”. Buying furniture to furnish a previously unfurnished property is different.
To keep this clean:
- keep the receipt for the new item
- keep evidence the old item existed (photos, inventory, or disposal note)
- note if the new item is a reasonable like-for-like replacement (small upgrades happen — that’s fine, but keep it sensible)
4) Insurance
Common allowable insurance costs include:
- buildings insurance (if you pay it)
- landlord insurance
- public liability cover (if relevant)
- contents insurance (if you provide contents)
5) Utilities and council tax (when you pay them)
If you pay bills during void periods, or you include bills in the rent (common with HMOs), those costs may be allowable.
The record-keeping matters here. Mixed personal/rental bills are one of the fastest ways to create questions.
6) Safety, compliance and professional services
Costs like these are often allowable where they relate to the rental business:
- gas safety checks (where required)
- electrical inspection/testing (where required)
- EPCs (where required)
- accountant fees for preparing your rental accounts/tax return
- legal fees for tenancy agreements or routine letting matters
If you want to keep everything tidy and consistent across the year, your accountant can also help you set up a simple reporting routine using Financial Reports so you’re not trying to rebuild the story at year-end.
7) Mortgage interest and finance costs (a common misunderstanding)
This is one of the biggest areas of confusion.
For most individual landlords, mortgage interest doesn’t reduce rental profit in the old “deduct it like any other expense” way. Instead, it’s generally given as a basic rate tax reduction (and the effect depends on your wider income and tax position).
This is why 2 landlords with the same rent and the same mortgage can still end up with very different tax bills.
If you’ve got multiple properties or higher-rate tax exposure, it’s worth getting advice early rather than finding out after you’ve filed.
8) Travel and mileage (often overclaimed)
Travel can be allowable if it’s wholly for the rental business (for example, visiting the property to deal with repairs or inspections). But HMRC can challenge anything that looks like it’s partly personal.
If you do claim mileage:
- log the date, destination, purpose, and miles
- keep it consistent
- don’t claim vague “property visits” without detail
Record-keeping: how to stay organised without drowning in admin
Good records don’t have to be complicated. They just have to be consistent.
What records you should keep (minimum essentials)
For each property, keep:
- tenancy agreements and rent schedules
- letting agent statements
- bank evidence of rent received
- invoices/receipts for expenses
- mortgage interest statements
- insurance documents
- notes for anything unusual (major repairs, disputes, insurance claims, settlement payments)
How long should you keep landlord records?
For Self Assessment, you generally need to keep your records for at least 5 years after the 31 January submission deadline for the relevant tax year. Practically, that means you’re often holding records for closer to 6 years in real life.
A simple folder structure that works
You don’t need fancy software to start. You need a system you’ll actually stick to.
Try:
- a folder per property
- subfolders by tax year (e.g., 2025–26)
- within each year: Income / Agent / Repairs / Insurance / Utilities / Mortgage / Other
If you want a smoother digital setup (including the ability to attach receipts to transactions), our Useful Links page includes common accounting tools that many landlords and small businesses use to keep records tidy.
Making Tax Digital for Income Tax: why landlords should prepare now
Even if you’re not in the first wave, Making Tax Digital is pushing landlords towards:
- digital record-keeping
- more regular reporting
- fewer end-of-year scrambles
The currently announced phased start dates for Making Tax Digital for Income Tax are:
- from 6 April 2026 if your qualifying income is over £50,000
- from 6 April 2027 if your qualifying income is over £30,000
- from 6 April 2028 if your qualifying income is over £20,000
If you want to get ahead of this without overcomplicating it, start with 2 habits:
- keep rental income/expenses separate (even if it’s just a separate bank account)
- update your records monthly (30 minutes a month is better than 8 hours in January)
If you’re already juggling other income (self-employment, a company, PAYE), you’ll find it much easier if your landlord records are clean. Our Who We Help page shows the different client types we support — and plenty of landlords sit in more than 1 category.
Common HMRC issues landlords run into (and how you avoid them)
1) Claiming improvements as repairs
This is the big one.
If you’ve done major works, HMRC will often look at the overall project:
- what was the property like before?
- what changed?
- is it simply being restored, or has it been upgraded?
How you protect yourself:
- keep before/after photos for large works
- keep a short note explaining the problem and what was done
- keep invoices detailed (avoid one-liners like “refurb”)
- split invoices where possible (repairs vs improvements)
2) Missing or misreporting rental income
This happens more than you’d think:
- part-month rent
- arrears paid later
- rent received via the agent net of fees (you still need to record the gross income and the fees)
- insurance settlements that relate to rental activity
- “extras” included in rent (for example, paid bills)
A simple monthly reconciliation (bank + agent statement) solves most of this.
3) Weak evidence for expenses
HMRC doesn’t just want totals. They want a trail.
Cash payments aren’t automatically disallowed, but they’re harder to prove. If you do pay cash:
- get a proper receipt/invoice
- note what work was done and which property it relates to
- ideally pay by bank transfer going forward
4) Overclaiming mixed-use costs
Common examples:
- phone bills used personally and for landlord activity
- travel that’s partly personal
- home office claims that aren’t supported by a sensible basis
If it’s mixed, either don’t claim it or apportion it with a clear method and notes.
5) Late filing and penalty creep
Landlords often leave filing until the deadline because it “feels” like a quick job — and then they discover missing paperwork, unclear expenses, or a question about a refurb.
If you’re already late (or you’re worried you might be), read Late tax returns and penalties so you know how costs can escalate and what to do first.
A simple monthly landlord accounting routine (that actually sticks)
If you want a process you can repeat every month, use this:
- Check rent received (bank + agent statement).
- Save all invoices/receipts for that month (repairs, insurance, agent fees, utilities).
- Categorise expenses (repairs vs improvements is the one to be careful with).
- Write a 1-line note on anything unusual (big repair, void period, tenant issue, insurance claim).
- File everything in your folder system.
Do that monthly and your year-end “accounts” become a tidy review, not a reconstruction job.
If you want support turning this into a clean, compliant setup (especially with MTD in mind), this is exactly what our Small Business Accountants service helps with — even if you’re “just” running a small property portfolio.
When it makes sense to get help (and what we can do for you)
You don’t have to wait for an HMRC letter to take landlord accounting seriously. The cheapest time to fix problems is before you file, not after.
At Asmat & Co, we help landlords:
- get rental income reported correctly
- claim allowable expenses confidently (without risky overclaims)
- keep records in a way that stands up to questions
- stay organised for Making Tax Digital changes
- bring everything together if you also have other income streams
If you want your landlord accounting sorted properly — or you just want someone to review your setup and point out the risk areas — get in touch via Contact Us and we’ll talk you through the best next step.
