Non-Resident Landlord Allowable Expenses and Deductions

Your letting agent's quarterly NRLQ calculation starts with the gross rent they collected, subtracts the expenses they actually paid out on your behalf during the quarter, and applies the 20% withholding rate to whatever's left. But the expenses your agent can deduct before calculating withholding aren't the same as the expenses you can claim on your annual Self Assessment return. That mismatch catches non-resident landlords year after year.

Two Layers of Expense Deduction

There are two separate stages where expenses reduce your tax:

At source (agent withholding). Your letting agent deducts expenses they've physically paid during the quarter before calculating 20% tax. These must be revenue expenses incurred "wholly and exclusively" for the property letting business under standard ITTOIA 2005 rules. Typical agent-deductible expenses include their own management fees, property maintenance and repairs, statutory safety certifications (gas safety, EICR, legionella), advertising for tenants, insurance premiums, and landlord-paid council tax or utility rates during void periods.

On your tax return (Self Assessment). You declare total rental income and then claim all allowable expenses — including ones the agent couldn't deduct at source. The tax you actually owe is calculated on the resulting net profit, and any tax already withheld by the agent (shown on your Form NRL6 certificate) is credited against your liability.

What Your Agent Cannot Deduct at Source

Certain costs are genuine allowable expenses for tax purposes but cannot be deducted by the agent when calculating quarterly withholding:

Mortgage interest. Since April 2020, mortgage interest on residential lets is no longer deductible as a property expense. Eligible individual landlords instead receive a basic-rate tax reduction for qualifying finance costs, calculated on their Self Assessment return. Your agent has no mechanism to apply this — it's a personal tax computation, not a property expense.

Capital expenditure. Replacing a kitchen or bathroom, structural alterations, or buying new furnishings for a previously unfurnished property are capital costs. They may qualify for replacement domestic items relief or be reflected in your capital gains computation if you sell, but they're not deductible in the quarterly NRLQ calculation.

Legal fees for purchase or sale. Conveyancing costs, stamp duty, and survey fees relate to acquisition or disposal, not to the property business's running costs.

Personal expenses. Your flights to visit the property, meals during inspection trips, and clothing are not allowable. HMRC draws the line strictly at costs incurred wholly and exclusively for the letting.

Common Allowable Revenue Expenses

These are deductible both at source (if the agent paid them) and on your return:

• Letting agent management fees (typically 8–15% of rent)
• Repairs and maintenance (fixing a boiler, repainting, replacing broken fixtures)
• Annual gas safety certificate (CP12), EICR electrical inspection
• Buildings insurance
• Ground rent and service charges (leasehold properties)
• Accountancy fees for preparing your rental accounts
• Water rates and council tax during vacant periods
• Advertising costs for finding tenants
• Legal fees for tenancy agreements, rent collection, or eviction proceedings
• Travel to the property for management purposes (but not commuting or personal visits)

The Mortgage Interest Tax Reduction

Since the full restriction took effect in April 2020, mortgage interest on residential lettings is handled as a basic-rate tax reduction rather than a deductible expense. For 2026–27, the reduction is calculated at 20% of qualifying finance costs (mortgage interest, loan arrangement fees, overdraft interest used for the property), subject to statutory limits.

On your Self Assessment, you enter the total finance costs on the SA105 UK Property pages. The system calculates the reduction and applies it against your tax bill, subject to statutory limits. For basic-rate taxpayers with enough property profit and taxable income to use the reduction, the net effect is broadly the same as the old deduction system. For higher-rate taxpayers, the change means an effective increase in the tax rate on rental profits financed by borrowing.

Where your property income falls in the basic-rate band, the reduction broadly matches the old deduction system. From 6 April 2027, the finance-cost reduction will be calculated at the property basic rate of 22%, rather than 20%. For landlords paying the property higher or additional rate, the reduction remains below their marginal property-income rate.

Getting the Numbers Right

The gap between what your agent deducts at source and what you claim on your return creates a mismatch every year. If your allowable Self Assessment expenses exceed what the agent deducted, you'll owe less tax than was withheld — and you claim the difference as a refund through your return. The Form NRL6 your agent issues by 5 July each year is the document that bridges the two.

Our Non-Resident Landlord Scheme guide includes a quarterly tax tracker template that logs both agent-deductible expenses and the additional items you'll claim on your SA105, so everything lines up when you file. It also covers the mortgage interest tax reduction calculation with worked examples for the current 20% basic rate and the incoming 22% property rate from April 2027.

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