Free UK landlord calculators
17 free calculators for the decisions landlords and letting agents make every day — yields, returns, cashflow, mortgages, tax, deposits, rent increases and voids. Every calculator comes with a plain-English explanation, a worked example and the rules that apply, updated for the Renters' Rights Act 2025.
Returns
Rental Yield Calculator
Work out gross and net rental yield for any UK property in seconds.
Gross Yield Calculator
The headline yield figure: annual rent as a percentage of property value.
Net Yield Calculator
Yield after the real cost of running the tenancy — the number that matters.
ROI Calculator
Measure annual profit against the cash you actually put into the deal.
Buy-to-Let Profit Calculator
Annual pre-tax and post-tax profit on a mortgaged buy-to-let.
Cashflow Calculator
Monthly money in, money out, and what is left in the bank.
Break Even Calculator
The rent, occupancy and interest rate at which the property stops making money.
HMO Income Calculator
Room-by-room income, bills, licensing and net profit on a house in multiple occupation.
Refurbishment ROI Calculator
Whether a refurbishment pays for itself in added rent and added value.
Rent & tenancy
Deposit Cap Calculator
The maximum deposit and holding deposit you may lawfully take.
Rent Increase Calculator
The new rent, the increase in percentage terms, and the earliest lawful date.
Rental Income Calculator
Annual gross and expected rental income across one or several properties.
Rent Affordability Calculator
Whether an applicant's income supports the rent, using the standard 30x rule.
Costs & tax
Finance
Compliance tools
Numbers are only half the job. Check what paperwork your property legally needs with the free Property Compliance Checker, or use the date tools for gas safety reminders, notice periods and EPC and MEES.