Rental Yield Explained for Northern Ireland Landlords

Rental yield is one of the most important numbers for buy-to-let investors. It tells you how much return you're getting on your property investment — and whether the numbers stack up against your mortgage, costs, and target return.

Gross yield vs net yield

Gross yield is the simplest measure:

Gross yield = (Annual rent ÷ Purchase price) × 100

For a property bought at £150,000 with £750/month rent (£9,000/year):

Gross yield = (£9,000 ÷ £150,000) × 100 = 6.0%

Net yield accounts for running costs:

Net yield = ((Annual rent − Annual costs) ÷ Purchase price) × 100

With £2,000/year in costs:

Net yield = ((£9,000 − £2,000) ÷ £150,000) × 100 = 4.7%

Use our rental yield calculator to work out your figures.

What costs to include

For net yield, include recurring costs:

• Maintenance and repairs
• Landlord insurance
• Letting agent fees (if applicable)
• Void periods (estimate 2–4 weeks per year)
• Ground rent and service charges
• Safety certificate renewals

Do not include mortgage interest in running costs for yield purposes — that is a financing cost, not a property operating cost. Mortgage interest affects your cash flow and tax, but not the property's underlying yield.

Typical yields in Northern Ireland

Yields vary significantly by area and property type:

Net yields are typically 1–2 percentage points lower than gross after costs.

How to use yield in decisions

Yield helps you answer:

• Does the rent cover the mortgage? Compare net yield to your mortgage rate
• Is this better than other investments? Compare to savings rates, stocks, or other properties
• Can I afford void periods? A 4% net yield with a 5% mortgage rate means you're subsidising the property

Remember that yield is only one factor. Capital growth, tax efficiency, and management effort all matter.

Improving your yield

• Review rent annually (within NI rules) — use our rent increase notice checker
• Minimise void periods with good tenant retention
• Keep maintenance costs predictable with regular inspections
• Consider HMO properties for higher yields (with additional compliance requirements)

This guide is for general information only and does not constitute legal advice. Rules and deadlines can change — always check the latest guidance from the Department for Communities, NI Housing Executive, or a qualified solicitor before acting.

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