Landlord Tax Guide 2026: What Maintenance Costs Can You Claim?
As a landlord in Crawley, Horsham, Redhill, Reigate, Horley, East Grinstead, Haywards Heath, Burgess Hill, Brighton, Epsom, or anywhere across West Sussex and Surrey, understanding what property maintenance costs you can claim against your rental income is essential for maximizing your returns and staying compliant with HMRC.
This comprehensive guide covers the tax rules for 2026, what plumbing and heating expenses are allowable, and how to keep proper records. Note: This is general guidance only—always consult a qualified accountant for advice specific to your situation.
What Counts as an Allowable Repair?
Work that restores the property to its original condition or replaces like-for-like is generally allowable against your rental income:
Examples of Allowable Repairs
- Fixing a broken boiler
- Repairing a leaking pipe
- Replacing a broken tap with equivalent
- Fixing a faulty radiator
- Unblocking drains
- Repairing burst pipes
- Boiler replacement (like-for-like)
- Fixing roof leaks
Plumbing & Heating Costs You CAN Typically Claim
The following plumbing and heating expenses are generally allowable as deductions against your rental income:
Boiler & Heating
- Annual boiler servicing - Essential maintenance (from £105)
- Boiler repairs - Fixing faults, replacing parts
- Boiler replacement - Like-for-like replacement when old one fails
- Radiator repairs - Fixing leaks, replacing valves
- Powerflush - System cleaning and maintenance
- Bleeding radiators - Part of professional service
- Thermostat replacement - Like-for-like replacement
- Pump repairs/replacement - Circulation pump fixes
Plumbing
- Leak repairs - Fixing pipes, joints, connections
- Tap repairs/replacement - Like-for-like
- Toilet repairs - Cistern mechanisms, seals, etc.
- Unblocking drains - Clearing blockages
- Pipe repairs - Fixing burst or leaking pipes
- Stopcock replacement - Essential maintenance
- Shower repairs - Fixing existing shower units
- Cylinder repairs - Hot water cylinder fixes
Safety & Compliance
- Gas Safety Certificate (CP12) - Annual legal requirement
- Electrical safety inspection (EICR) - Required every 5 years
- Legionella risk assessment - Recommended for landlords
- Carbon monoxide detector installation - Now required by law
- Smoke alarm installation - Legal requirement
The Replacement Domestic Items Relief
Since April 2016, landlords can claim relief when replacing "domestic items" in a rental property. This includes:
Covered Items:
- Movable furniture
- Furnishings (carpets, curtains)
- Household appliances
- Kitchenware
- Boilers (integral to building - different rules)
Key Conditions:
- Must be replacing an existing item
- For sole use of tenant
- Can only claim cost of equivalent item
- Must deduct any proceeds from selling old item
Need Professional Invoices for Tax Purposes?
We provide detailed, professional invoices for all work—perfect for your tax records
Essential Record-Keeping for Landlords
HMRC requires you to keep records for at least 5 years after the submission deadline for the relevant tax year. For landlords, we recommend keeping records indefinitely for capital improvements.
What to Keep:
- Invoices - Detailed invoices showing work done, date, and cost
- Receipts - Proof of payment
- Bank statements - Showing payments to contractors
- Before/after photos - Especially for major work
- Correspondence - Emails or letters about work needed
- Gas safety certificates - Annual CP12 records
- Service records - Boiler service history
Common Mistakes Landlords Make
❌ Not Keeping Receipts
Without proper documentation, you can't claim expenses. Request itemized invoices for all work and file them immediately.
❌ Claiming Improvements as Repairs
HMRC can investigate and impose penalties if you incorrectly claim capital improvements as revenue expenses.
❌ Using Cash-in-Hand Workers
No invoice means no proof for tax purposes. Always use registered tradespeople who provide proper documentation.
❌ Missing Annual Compliance Costs
Gas safety certificates, EICRs, and other compliance costs are allowable but often forgotten when filing tax returns.
❌ Not Separating Personal and Rental Expenses
Keep rental property expenses completely separate from personal expenses with dedicated accounts or clear categorization.
Working with a Trusted Maintenance Provider
Using the same plumber and Gas Safe engineer for all your properties offers significant advantages for tax purposes:
Consistent Documentation
Same invoice format, easy to file and reference. Clear audit trail for HMRC if ever needed.
Complete Service History
Your plumber maintains records of all work done, providing backup documentation if you lose receipts.
Accurate Categorization
A regular provider understands what counts as repair vs improvement and can help categorize work correctly.
Annual Service Reminders
Never miss allowable annual expenses like boiler services and gas safety certificates.
At Mend Your Home, we work with many landlords across Crawley, Horsham, Redhill, Reigate, Horley, East Grinstead, Haywards Heath, Burgess Hill, Brighton, Epsom, and throughout West Sussex and Surrey. We understand landlord requirements and provide detailed invoices perfect for tax records.
Hidden Savings: How a New Boiler Reduces Your Costs
Beyond tax deductions, smart landlords are discovering significant ongoing savings by investing in a new boiler installation. Here's how upgrading your heating system can reduce your overall costs:
Landlord Insurance Savings
Manufacturer Warranty Protection
New boilers come with manufacturer warranties of up to 10+ years. This means fewer claims on your landlord insurance, which insurers reward with lower premiums. Many landlords find their policy costs drop significantly after installing a new, warrantied boiler.
Remove Loft Tanks = Lower Risk
Switching from an old gravity system to a modern combi boiler eliminates the cold water tank in the loft. For insurers, this removes one of the biggest leak risks in a property. No loft tank means no frozen tank disasters, no overflow leaks, and significantly reduced water damage risk. Many insurers offer better rates for properties without loft tanks.
Less to Go Wrong
Modern combi boilers have fewer components than old gravity systems with separate tanks, cylinders, and pumps. Fewer components = fewer potential failure points = lower risk for insurers = better premiums for you.
Say Goodbye to Boiler Cover
Many landlords pay £150-£300+ per year for boiler breakdown cover on each property. With a new boiler installation, you may be able to:
- Cancel boiler cover entirely - Manufacturer warranties often cover parts AND labour for 5-10+ years, making separate boiler cover redundant
- Reduce existing cover costs - If you prefer to keep cover, premiums for new boilers are significantly lower than for aging systems
- Eliminate emergency call-out worries - Warranty repairs are typically covered at no extra cost
Benefits Summary: New Boiler for Landlords
Financial Benefits
- Lower landlord insurance premiums
- Eliminate or reduce boiler cover costs
- Lower energy bills (better efficiency)
- Fewer emergency repair costs
- Potential EPC improvement (better rental value)
Risk Reduction
- No loft tank leak disasters
- Fewer breakdown callouts
- Happier tenants (reliable heating)
- Longer warranty protection
- Modern safety features
Quick Reference: 2026 Allowable Expenses Checklist
✓ Generally Allowable Expenses
- Boiler servicing & repairs
- Gas Safety Certificates (CP12)
- EICR electrical testing
- Plumbing repairs
- Leak detection & repair
- Drain unblocking
- Powerflush services
- Like-for-like replacements
- Emergency call-outs
- Landlord insurance
- Letting agent fees
- Ground rent & service charges
- Property management fees
- Accountancy fees (for rental accounts)
Getting Professional Tax Advice
This guide provides general information, but tax situations vary. We strongly recommend:
- Consulting a qualified accountant familiar with property taxation
- Keeping up-to-date with HMRC guidance changes
- Using property tax specialists if you have multiple properties
- Reviewing your situation annually, especially after major work
Landlord Services Across West Sussex & Surrey
Professional plumbing, heating, and gas safety services with detailed invoices for your records