Rental Yield Calculator

Rental Yield Guide

What's the difference between Gross and Net Yield?

Two key yield measures: Gross yield = (annual rent / property price) × 100. Simple headline figure. Ignores all costs. Net yield = (annual rent - annual costs) / property price × 100. Accounts for running costs. More realistic. UK gross yield benchmarks (2024): under 4%: low (typical London, South East). 4-6%: moderate (much of England). 6-8%: good (Northern England, Wales, Scotland cities). 8%+: high (some Northern towns, student areas, HMOs). Net yield typically runs 2-3 percentage points below gross yield once costs are factored in.

Why Net Yield Matters More?

Costs that reduce real returns: mortgage interest (biggest cost for leveraged purchases). Letting agent fees (8-15% of rent for full management). Maintenance and repairs (budget 1% of property value/year minimum). Landlord insurance. Gas safety certificates, EICR electrical checks (legal requirements). Service charges/ground rent (leasehold flats). Void periods (no rent between tenancies). Ongoing compliance costs (EPC, deposit protection, Right to Rent checks). Hidden costs people forget: boiler and appliance repairs, garden maintenance if not the tenant's responsibility, and periodic redecoration between tenancies.

What do I need to know about Section 24 Tax Changes?

Major tax change since 2017: Section 24 restricts mortgage interest relief for individual landlords. Old rules (pre-2017): could deduct full mortgage interest from rental income before tax. New rules (fully in force since April 2020): no longer deduct mortgage interest as expense. Instead, get a 20% tax credit on mortgage interest. Impact on higher-rate taxpayers: previously: rent minus all costs (inc. interest) = profit, taxed at 40%. Now: rent minus costs (excluding interest) = higher 'profit' on paper, taxed at 40%, with a 20% tax credit applied afterwards for the mortgage interest — the net effect still raises the tax bill for many higher-rate landlords even though actual cash profit is unchanged.

What do I need to know about Return on Investment (ROI)?

ROI measures return on actual cash you've invested (not the full property value). ROI = annual profit / total cash invested × 100. Total cash invested = deposit + purchase costs (SDLT, legal, survey) + initial works. Why ROI matters: leverage (mortgage) means you control a large asset with relatively little cash. £200,000 property with £50,000 deposit: if it generates £4,000 annual profit, that's 8% ROI on your £50,000 cash (vs 2% yield on the £200,000 property value). Leverage amplifies both returns and risk — the same principle that boosts ROI on a mortgaged property also means a fall in property value or a bad void period hits your cash return proportionally harder.

Gross Yield vs. Net Yield: Why the Gap Matters More Than Either Number Alone

Gross rental yield is simply annual rent divided by property value, giving a quick, easy-to-compare headline figure that ignores every cost of actually running the property. Net yield subtracts the real running costs — letting agent fees, maintenance, insurance, service charges or ground rent where applicable, void periods, and mortgage interest if you want a true cash-on-cash figure — before dividing by property value, giving a far more honest picture of what the property actually returns. Two properties with identical gross yields can have very different net yields if one carries high service charges or sits in a higher-maintenance older building, which is why serious investors treat gross yield as a screening tool only, never as the number to make a final decision on.

Why High-Yield Areas Often Carry Trade-Offs Worth Weighing

Properties and regions advertising unusually high rental yields often carry offsetting risks that the headline percentage doesn't show: weaker long-term capital appreciation prospects, higher tenant turnover and void periods, more demanding property management, or locations more exposed to economic shifts affecting local employment and rental demand. Conversely, areas with strong long-term capital growth prospects frequently show comparatively low yields, because property prices have already risen to reflect that expected future growth, compressing the rent-to-price ratio. Because of this trade-off, experienced investors usually weigh yield alongside expected capital appreciation and risk, rather than chasing the single highest yield figure in isolation.

How Furnished Holiday Lets and HMOs Change the Yield Calculation

Standard buy-to-let yield calculations assume a single tenancy generating one rent figure, but furnished holiday lets (FHLs) and houses in multiple occupation (HMOs) can produce materially higher headline yields while carrying different cost structures and risk. An HMO let room-by-room to multiple tenants typically generates substantially more combined rent than the same property let as a single family home, because total rent is driven by per-room pricing rather than one household's budget, but it also requires licensing in most areas, higher safety and fire compliance costs, more frequent void periods between individual tenants, and more intensive management. Furnished holiday lets can achieve strong nightly rates in popular locations, but occupancy is seasonal and uncertain, cleaning and turnover costs recur with every booking rather than once a year, and furnishing and maintenance costs run higher than a standard let. Both property types can show eye-catching gross yields on a simple annual-rent-over-price calculation, but the gap between gross and net yield tends to be wider than for a conventional single tenancy, so modelling realistic occupancy rates and management costs separately is particularly important before comparing the result against a standard buy-to-let yield.

Worked Example: Gross vs Net Yield on a Rental Property

Suppose a buy-to-let property costs £220,000 and rents for £1,100 a month (£13,200 a year).

This is a dramatic gap — a property advertised at a 6.0% gross yield is actually returning closer to 2.1% once realistic running costs and financing are included. Gross yield is useful for quickly comparing properties at a glance, but net yield is what actually determines whether a rental investment is cash-flow positive after all the costs a landlord genuinely has to pay, which is why experienced investors always ask for (or build) the net figure before committing to a purchase.

Typical Gross Yield Ranges by Property Type

Yields vary considerably by property type and location, generally reflecting a trade-off between yield and capital growth potential or perceived risk.

These patterns are general tendencies, not guarantees, and the gap between high-yield and low-yield areas often reflects genuine trade-offs — tenant demand stability, void periods, maintenance costs, and capital growth prospects — rather than a straightforward 'better deal.' Always calculate net yield for a specific property rather than relying on area-level yield reputations.

Void Periods and Their Effect on Realized Yield

The yield calculations shown so far generally assume the property is rented continuously for 12 months, but void periods — time between tenancies when no rent is coming in — reduce realized income below the figure implied by the advertised monthly rent. A property renting for £1,100 a month that sits empty for one month during a tenant changeover only generates 11 months of income (£12,100) rather than the full £13,200 implied by multiplying the monthly rent by twelve, cutting the effective gross yield from 6.0% to roughly 5.5% on the same £220,000 purchase price. Areas or property types with higher tenant turnover (student lets, short-term furnished lets) typically carry a higher void risk than stable family lets with long-term tenants, which is one reason a higher advertised yield in a higher-turnover category doesn't always translate into a proportionally higher realized return once void periods and the associated re-letting costs (agency fees, cleaning, minor repairs between tenancies) are factored in.

How Mortgage Rates Affect Net Yield and Cash Flow

Gross and net yield calculations typically stop at operating costs, but for a mortgaged buy-to-let, financing cost is often the single biggest line item and it moves with interest rates independently of the property's own performance. A property generating a 6% gross yield can still be cash-flow negative once a mortgage at a higher rate is serviced, even though the yield figure itself looks healthy on paper. As a rough illustration: a GBP 200,000 property on an interest-only mortgage at 75% loan-to-value sees its annual interest cost rise by roughly GBP 1,500 for every 1 percentage point increase in the mortgage rate. On a property earning GBP 12,000 in annual rent, that single percentage-point rate rise can consume an eighth or more of the rental income. This is why landlords increasingly look at yield after financing costs (sometimes called the cash-on-cash return) rather than stopping at net yield, especially in a period where mortgage rates have moved substantially within a few years.