Free UK landlord tools & calculators
Hand-built by the LetCompliance team to answer the three questions every UK landlord asks most, and all three can silently cost you thousands if miscalculated. No email gate, no signup, no paywall.
Finance
Rental yield
Gross yield is a vanity metric. See your real net return after mortgage, running costs and tax, then save the scenario to compare properties side by side.
Open calculatorCompliance
Section 21 deadline
Section 21 is being abolished by the Renters Rights Act 2026, but it's still live today. Miss one prerequisite and the notice is invalid, costing you months.
Open calculatorDeposits
Deposit deadline
30 calendar days from receipt, not the tenancy start. Miss it and courts can award tenants 1–3× the deposit and block your Section 21.
Open calculatorFinance
Stamp Duty BTL
SDLT on buy-to-let is complex. Residential rates + 5% additional-property surcharge + 2% non-resident surcharge. Get the exact bill before you offer.
Open calculatorFinance
BTL stress test
Every UK BTL lender stress-tests your rent at 5.5%–7% with ICR of 125% (basic-rate) or 145% (higher-rate). See the maximum loan your rent supports.
Open calculatorFinance
CGT on BTL
Selling a BTL? CGT rates changed in April 2024 and the allowance is now just £3,000. Plus you have 60 days from completion to report and pay. Run the numbers before you accept an offer.
Open calculatorFinance
HMO all-in yield
Gross yield on purchase price flatters bad projects. See true all-in yield on total project cost and cash-on-cash after interest-only mortgage, management and bills.
Open calculatorWhy free, why no signup?
These tools solve a problem in under 30 seconds. If they help and you decide LetCompliance could run your whole portfolio, great. If not, bookmark the page and come back any time. We track zero personal data on these tools.