Rental Yield Calculator

How to Use the Rental Yield Calculator

Yield is the one number that lets you compare two properties fairly, because it deliberately ignores how each one is financed. Two investors buying the same building with different mortgages get the same yield and completely different cash flow — and the yield is the part that describes the building.

1. Enter the purchase price. The price you would actually pay, not the asking price. If you have already bought, use what you paid rather than today's estimated value, unless you are deciding whether to sell.
2. Enter the annual rent. Twelve months at the full figure. The calculator does not deduct voids here, because void periods belong in the running costs box where you can see them.
3. Enter annual running costs. Management, maintenance, insurance, property tax, ground rent or service charges, and an allowance for empty months. This is the field people leave nearly empty and should not.
4. Add purchase costs if you want the honest version. Fees and transfer taxes are real capital you will never get back, and including them gives the yield on money spent rather than the yield on the headline price.
5. Compare the three yields. Gross flatters, net on price is the usual quoted figure, and net on total outlay is the one that reflects your actual position.

The sensitivity table underneath shows the yield at prices 20% either side of yours. It is the fastest way to see what a negotiation is worth: on the worked example, knocking 10% off the price lifts the net yield from 5.05% to 5.61%.

Rental Yield Formula

Three variants of the same idea. The difference between them is what goes in the denominator and what comes out of the numerator.

The gap between gross and net is the single most useful diagnostic on the page. If your costs are under a quarter of rent, you have probably forgotten something; if they are over 45%, either the property is unusually expensive to run or the rent is too low for the asset.

Example

A $285,000 flat let at $1,800 a month

1. Annual rent: 1,800 × 12 = $21,600.
2. Gross yield: 21,600 ÷ 285,000 × 100 = 7.58%.
3. Running costs: management $1,730, maintenance $2,850, insurance $1,450, ground rent and service charge $1,170 — $7,200 in total.
4. Net rent: 21,600 − 7,200 = $14,400.
5. Net yield: 14,400 ÷ 285,000 × 100 = 5.05%.
6. Costs are 7,200 ÷ 21,600 = 33.3% of rent — right in the middle of the normal range.

Adding the purchase costs

Fees, legal work and transfer taxes on this purchase come to $9,500, so the real outlay is $294,500 rather than $285,000. Net yield on that figure is 14,400 ÷ 294,500 = 4.89%. It is only sixteen basis points lower, but the direction is always the same and the effect is much larger in markets with high transfer taxes — at 5% purchase costs the same property yields 4.81%.

What negotiation is worth

Agreeing $256,500 instead of $285,000 — a 10% reduction — moves the gross yield from 7.58% to 8.42% and the net from 5.05% to 5.61%. Paying 10% over, at $313,500, drops the net to 4.59%. In yield terms, the purchase price is a permanent decision: no amount of good management recovers a fifty-basis-point overpayment.

What Counts as a Good Yield

Here is what the same rent produces at five different purchase prices.

Notice how much faster the net yield falls than the gross. That is because running costs are largely fixed against the building, not against the price. Paying more does not buy you cheaper insurance or a cheaper boiler, so every extra dollar of price lands entirely on the net figure.

What counts as a good yield depends entirely on location. Expensive city-centre property routinely returns 3% to 4% net because buyers are paying for expected capital growth. Regional and secondary markets often return 6% to 8% net because they are not. Neither is better in the abstract — they are different bets, one weighted to income and one to appreciation.

Where yield stops being useful is the moment you introduce a mortgage. A 5.05% net yield with a 6.9% mortgage rate on 75% of the price produces negative leverage: the borrowing costs more than the asset earns. The property investment calculator runs that arithmetic properly and shows the cash flow that results.

Four Ways a Quoted Yield Misleads

Four ways a quoted yield misleads, and how to check.

The rent is aspirational. Agents quote achievable rents. Ask what the current tenant pays, when the lease renews, and how long the property sat empty before it was let. A yield built on a 10% optimistic rent is a 10% optimistic yield.

Costs are omitted or halved. Gross yield is the number in every listing precisely because it is the flattering one. On the worked example the difference between gross and net is 2.53 percentage points — a third of the headline figure evaporates the moment real costs go in.

Service charges on flats can move sharply. A building that needs major works can levy a charge that wipes out a year of net rent. Ask for the last three years of accounts and any planned works before trusting a leasehold yield.

Yield says nothing about capital. A 9% yield in a market where prices have fallen for a decade is not obviously better than a 4% yield where they have not. Yield measures income only; total return is income plus capital, and the second half is invisible here.

Two useful companions. The property tax calculator firms up one of the larger cost lines, and the ROI calculator lets you compare the resulting return against a non-property alternative on the same basis.

One last habit worth adopting: recalculate the yield annually against the property's current value, not the price you paid. A flat bought at $285,000 and now worth $400,000 yields 5.40% gross on today's value. That is the number that tells you whether continuing to hold it is the best use of the capital tied up in it — and it is the calculation almost no landlord runs.