Enter the purchase price and the monthly rent to see the gross yield. Add your buying costs, empty months and running costs for the net yield and, if you like, your Income Tax rate for an estimate after tax at 2026 to 2027 rates. Amounts are rounded to the nearest penny and yields to two decimal places.
Gross yield
The rent for a year divided by the purchase price. It is quick for comparing listings, but it ignores buying costs, empty months and running costs, so it always flatters a property.
Net yield
It starts from the rent you actually collect after empty months, takes off the costs you pay as the landlord (letting agent’s fees, service charge and ground rent, insurance, repairs and maintenance) and divides what is left by the total cost of the purchase: the price, buying costs such as Stamp Duty Land Tax and legal fees, and any works before the first let.
After tax
Choose the Income Tax rate your rental profit falls in. The calculator deducts your running costs, or the £1,000 property allowance when that is larger, because you can claim one or the other but not both. It uses the 2026 to 2027 rates: 20%, 40% and 45% in England, Wales and Northern Ireland, and the Scottish rates from 19% to 48% for Scottish taxpayers.
What it leaves out
The calculation is for a property bought outright. It does not include mortgage interest, losses brought forward from earlier years, replacement of domestic items relief, or the way the rent can push part of your income into a higher band. The tax shown is an estimate at one marginal rate, not a tax return.
Gross yield = monthly rent × 12 ÷ purchase price × 100.
Net yield = (rent collected − running costs) ÷ (price + buying costs + works) × 100.
Net yield after tax = (net income − Income Tax) ÷ total cost × 100.
Example: a flat bought for £200,000 and let at £1,000 a month
A year’s rent is £12,000.00, a gross yield of 6%. With about two weeks empty (0.5 months), a 12% agent’s fee, £1,200 of service charge and ground rent, £300 of landlord insurance and £600 of repairs, the running costs come to £3,480.00 out of £11,500.00 of rent collected, leaving a net income of £8,020.00. Against a total cost of £213,000.00 (the price, £11,500 of Stamp Duty Land Tax at the higher rates for an additional property in England, and £1,500 of legal fees), the net yield is 3.77%. At the basic rate of 20%, Income Tax of £1,604.00 brings the yield after tax to 3.01%.