What is the difference between gross rental yield and net rental yield?

Full answer

Rental yield is one of the most commonly quoted figures when comparing buy-to-let investment opportunities, but the difference between the gross and net versions can make properties that look similarly attractive on a gross basis produce very different actual returns once real costs are accounted for. **How gross rental yield is calculated** Gross rental yield is calculated as: (Annual rental income ÷ Property value) × 100. This is a quick, simple calculation widely used for initial comparison between properties, but it deliberately ignores ALL costs of actually owning and letting the property -- mortgage interest, letting agent fees, maintenance and repairs, insurance, ground rent and service charges (for leasehold flats), landlord licensing costs, and periods when the property sits empty between tenants (void periods). **How net rental yield is calculated** Net rental yield instead calculates: ((Annual rental income − Annual running costs) ÷ Property value) × 100, deducting the REAL costs of running the investment before calculating the percentage return. This produces a genuinely more accurate picture of the actual return a landlord can expect to keep, though it requires realistic estimates of costs that can be harder to pin down precisely in advance than the simple gross calculation. **Why the gap between gross and net can be substantial** For a mortgaged buy-to-let property, mortgage interest alone can absorb a very significant proportion of the gross rental income, particularly at higher interest rates or higher loan-to-value ratios -- combined with typical annual costs for letting agent management fees (often 10-15% of rent if using a full management service), routine maintenance, landlord insurance, and periodic void periods between tenancies, the net yield can end up meaningfully lower than the headline gross yield figure that initially attracted the investor's attention. **Why gross yield is still commonly used for initial comparison** Despite its limitations, gross yield remains widely used in property listings and initial investment screening because it is quick and simple to calculate using just two easily available figures (rent and price), allowing investors to rapidly compare many potential properties before doing the more detailed net yield analysis on their genuine shortlist of serious candidates. **Section 24 and its effect on true net returns for higher-rate taxpayers** For individually-owned (rather than limited company) buy-to-let properties, Section 24 restricts mortgage interest relief to a 20% tax credit rather than allowing full deduction against rental income before tax -- this means that for higher and additional-rate taxpaying landlords in particular, the TRUE after-tax net return can be meaningfully lower again than even a carefully calculated pre-tax net yield figure suggests, since a significant portion of the mortgage interest cost effectively cannot be fully offset against tax at the landlord's higher marginal rate. **Worked example** A buy-to-let flat is purchased for £200,000, generating £12,000 a year in rent -- a gross yield of 6% (£12,000 ÷ £200,000). After deducting £5,000 a year in mortgage interest, £1,200 in letting agent management fees (10% of rent), £600 in landlord insurance, £800 in typical annual maintenance and repair costs, and an estimated £400 equivalent cost from an average of 2 weeks void period a year, total annual costs come to £8,000, leaving £4,000 net rental profit before tax -- a net yield of just 2% (£4,000 ÷ £200,000), dramatically lower than the initially attractive 6% gross yield figure. **Practical tip** Use gross yield only for a quick initial screening comparison between potential properties, but always calculate a realistic net yield (including a sensible allowance for void periods and maintenance, not just the most obvious costs like the mortgage) before making an actual investment decision, since the gap between gross and net yield can be the difference between a genuinely profitable investment and one that barely breaks even once real running costs are properly accounted for.

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