How to Use the Rental Yield Calculator
The Rental Yield Calculator computes both gross and net rental yield for any buy-to-let investment property, factoring in all the costs that affect your actual return: mortgage payments, agent fees, insurance, maintenance, void periods, and letting management costs.
Enter the property value (or purchase price), monthly rent, and running costs. The calculator shows gross yield (rent ÷ property value × 100), net yield after costs, and — if you have a mortgage — the return on your cash equity rather than the total property value.
A crucial nuance is the difference between gross and net yield. A 7% gross yield sounds impressive but after mortgage interest, void periods (budget 4–6 weeks/year), agent fees (8–15%), maintenance (1% of property value/year), insurance, and property management, the net yield is often 3–4%. Always model net yield before investing.
📊 Worked Example
£250,000 property, £1,050/month rent, 25% deposit, 5% mortgage rate:
- Gross yield: 5.04% (£12,600/year ÷ £250,000)
- Annual costs (mortgage, fees, maintenance): £10,950
- Net income: £1,650/year
- Net yield on deposit (£62,500): 2.6%
- Total return with 3% capital growth: ~5.6%
Common Use Cases
- ✅ Evaluating whether a property investment makes financial sense
- ✅ Comparing rental yields across different properties and locations
- ✅ Calculating net yield after all costs including mortgage payments
- ✅ Assessing the return on your cash equity vs alternatives
- ✅ Understanding the impact of void periods on annual yield
- ✅ Comparing buy-to-let yield vs stocks and shares or savings rates
Frequently Asked Questions
What is a good rental yield in the UK?
A gross yield of 5–8% is generally considered good in the UK. Yields above 8% may indicate either a bargain or higher risk (economically deprived areas, higher void rates, or maintenance costs). London typically yields 3–4% gross; regional cities like Manchester, Liverpool, and Birmingham often yield 5–7%. Always calculate net yield for fair comparison.
What is the difference between gross and net rental yield?
Gross yield = (Annual Rent ÷ Property Value) × 100. Net yield deducts all costs (mortgage interest, agent fees, insurance, maintenance, void periods) before dividing by property value. Net yields are typically 2–3 percentage points lower than gross. Net yield is the metric that matters for your actual return.
How do void periods affect my yield?
A void period is when the property is empty with no rental income. Even one month void reduces your annual income by 8.3%. Budget for 4–6 weeks of voids per year (7.7–11.5% of rental income). Areas with high tenant demand and low supply have shorter typical voids.
How does Section 24 affect buy-to-let profitability?
Since 2020, landlords can no longer deduct mortgage interest from rental income before paying tax. Instead, they receive a 20% basic rate tax credit. This is neutral for basic rate taxpayers but severely negative for higher rate taxpayers, who now pay tax on rental income before accounting for the full mortgage interest cost.
What is leveraged yield?
Leveraged yield measures your return on the cash you've actually invested (your deposit), not the total property value. If you've put in £60,000 and make £3,000 net profit after all costs including mortgage, your leveraged yield is 5% — even if the yield on the full property value is only 2%. Leverage magnifies both returns and risks.