Last updated: June 2026
Every tax rate, threshold, band and rule used across UK Landlord Tools' calculators is sourced directly from official UK government and regulatory publications - primarily HMRC (income tax, dividend tax, corporation tax, SDLT, CGT and Making Tax Digital thresholds), the Office for National Statistics (ONS) for housing and rental market data referenced in our guides, and the Bank of England for base rate figures used in mortgage and affordability calculations.
All tax rates and thresholds used across the site are maintained in one central, version-controlled file. This means that when a rate changes - at a Budget, a Spring Statement, or when new legislation is announced - it is updated in a single place and immediately reflected consistently across every calculator that uses it. This reduces the risk of one calculator showing an outdated figure while another shows the current one.
Where a change has been announced but not yet taken effect - such as the new 22%/42%/47% property income tax rates due from April 2027, or the phased rollout of Making Tax Digital for Income Tax - we build it into the relevant calculators ahead of time wherever possible, clearly labelled by tax year, so landlords can plan ahead rather than be caught out when the change lands.
Figures are checked against HMRC and other official sources at the time each calculator is built, and reviewed again whenever a Budget, Spring Statement, or relevant legislative change (such as the Renters' Rights Act 2025) is announced. If you spot a figure that looks out of date or incorrect, please let us know - see the contact details below.
Tax and lettings law is complex and depends on individual circumstances that a general calculator cannot fully capture. Our tools are designed to give you a clear, accurate starting point - not a final answer. See our Disclaimer for more on how to use these figures responsibly.
Spotted an outdated or incorrect figure? Email [email protected] and we'll look into it.