2025 Tax Planning: Every Landlord Deduction You're Missing

From mortgage interest relief to capital allowances, ensure you're claiming everything legally available.

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David Mitchell

Property Expert

16 December 2025
6 min read
2025 Tax Planning: Every Landlord Deduction You're Missing

2025 Tax Planning: Every Landlord Deduction You're Missing

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Maximising Tax Efficiency as a UK Landlord

With Section 24 now fully phased in, tax planning is more important than ever. Here's what you can (and should) be claiming.

Allowable Expenses

100% Deductible:

  • Letting agent fees
  • Legal fees for short leases or tenant disputes
  • Accountant fees
  • Insurance (landlord, buildings, rent guarantee)
  • Ground rent and service charges
  • Council tax (during void periods)
  • Utility bills (if you pay them)
  • Cleaning and gardening services
  • Property maintenance and repairs

Capital Allowances (Furnished Properties):

  • 10% wear and tear (simplified)
  • OR actual replacement cost of furnishings

The Mortgage Interest Trap

Since April 2020, you can only claim a 20% tax credit on mortgage interest, not a deduction from income. This affects higher-rate taxpayers significantly.

Example:

  • Rental income: £15,000
  • Mortgage interest: £8,000
  • Other expenses: £3,000
  • Taxable income: £12,000 (not £4,000!)
  • Tax credit: £8,000 × 20% = £1,600

Limited Company Consideration

For new purchases or large portfolios, a limited company structure may be more tax-efficient:

Pros:

  • Mortgage interest fully deductible
  • Corporation tax (25%) vs. income tax (40-45%)
  • Easier to pass to family

Cons:

  • Higher mortgage rates
  • CGT on transfer of existing properties
  • Additional admin and accounting costs

Often Missed Deductions

  1. Mileage to properties - 45p per mile for first 10,000 miles
  2. Home office costs - If you manage properties from home
  3. Training courses - Property management, tax, compliance
  4. Professional subscriptions - NRLA, landlord associations
  5. Bad debts - Rent owed but irrecoverable

Year-End Actions

Before 5th April:

  • Review all expense receipts
  • Calculate mileage log
  • Confirm mortgage interest statements
  • Consider pension contributions to reduce tax band
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Written by David Mitchell

Property Expert

Expert contributor at roost, providing insights on UK property management, compliance, and investment strategies.

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