Compare two or three
properties you are actually considering.
Put your own numbers in and the comparison does the arithmetic that sales material leaves out: price per square metre, rent per square metre, stamp duty at your own buyer status, and yield after the charges rather than before them.

Short answer
From your own figures for two or three properties, the tool works out price and rent per square metre, stamp duty at your buyer status and net yield: rent after voids, building charges, running costs and the management fee, divided by price plus stamp duty.
It is before tax and mortgage interest and leaves out legal fees, searches, furnishing and currency: it is not a return.
Your property figures stay in this browser
unless you choose to share them.
Everything runs in your browser. Fill in what you know, leave the rest blank, and print the page when you take it to a viewing.
Running costs and voids, the same for all three columns0 weeks with no rent · management 12% of rent collected · insurance, repairs and other £1,000 a year · example figures
These are the example figures the rental yield calculator opens with. Replace each one with your own, and enter 0 where a cost does not apply. A blank line counts as missing, not as zero.
| Property A | Property B | Property C | |
|---|---|---|---|
| Your label for it | Example | ||
| Purchase price (£) | |||
| Internal area (m²) | |||
| Expected monthly rent (£) | |||
| Lease years remaining | |||
| Service charge (£/year) | |||
| Ground rent (£/year) | |||
| Estate charge (£/year) | |||
| Completion | |||
| Calculated | |||
| Price per m² | — | — | — |
| Rent per m² per month | — | — | — |
| Stamp duty | — | — | — |
| Building charges a year | — | — | — |
| Gross yield on price | — | — | — |
| Net operating income, a year | — | — | — |
| Net yield before tax and finance costs | — | — | — |
Net yield here is the same calculation as in our rental yield calculator: the annual rent, less the weeks with no rent, less each column’s service charge, ground rent and estate charge, the running costs above and the letting and management fee on the rent collected, divided by the price plus stamp duty.
It is before tax and before mortgage interest, and it leaves out legal fees, searches, furnishing and currency, so it is not a return: it is a like-for-like ratio for comparing these columns with each other.
For one property in detail, with your own purchase costs, a fee in pounds, mortgage interest and the cash flow after it, use the rental yield calculator. Enter the stamp duty shown here as its purchase costs, and the same figures give the same net yield.
No column is marked best, cheapest or highest-yielding. Which one wins depends on what the money has to do, and that is a question about your plan rather than about the three flats.
It holds no listings,
and that is the point.
- There is no dropdown of developments here. Comparison tools that ship with a property database compare that database, which means they compare what one company is selling.
- Because you supply the figures, you can compare a development we have nothing to do with against one we do. We would rather be useful than be the only option in the list.
- Price lists developers send us are marked confidential, and we never publish their figures. Our project pages (for example Bermondsey Heights or Sterling Place) show only prices the developer publishes on its own website (the starting price and example homes), with the source and the date we checked them. In this tool, you supply every figure.
- Every output is indicative and depends entirely on what you typed. The developer’s written figures, and your solicitor’s, are what govern.
Bring the printout.
We will fill the gaps.
Send us the two or three you are weighing and we will put the missing questions to the developers in writing.
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