All Calculators
19 free tools covering the full UK property-investor lifecycle. Section 24 baked into every relevant calc — calculations run in your browser.
Tier 1 · Table-stakes
Stamp Duty / LBTT / LTT
Unified SDLT, LBTT, LTT with all surcharges
Rental Yield & ROI
Gross, net & true net-of-tax yield
BTL Mortgage Stress Test
Multi-lender ICR matrix + top-slicing
Mortgage Comparison
Up to 4 scenarios with cliff modelling
Residential Affordability
Income multiples + lender stress test
Tier 2 · The moat (UK-specific)
Section 24 Multi-Year
The cash-vs-tax wedge over 10+ years
Personal vs Limited Company
Structure decision with crossover year
Portfolio Incorporation Cost
SDLT + CGT + refi break-even
Full BTL Investment Model
25-yr after-tax with optimal exit
CGT + Optimal Sale Year
Reliefs, band split, year-by-year optimiser
BRRRR Calculator
Buy, Rehab, Rent, Refinance, Repeat (UK)
Rental Property Comparison
Up to 4 properties side-by-side after-tax
Tier 3 · Visionary / brand-defining
HMO Deal Analyser
Room-by-room with bills + compliance
Portfolio Stress Dashboard
Whole-portfolio Section 24 + rate-shock
Rent-to-Rent / SA
Nightly rates, occupancy, VAT trap
Making Tax Digital Readiness
Mandation date + quarterly cash aside
Rate Shock / Refinance Cliff
+1/+2/+3pp shocks + ICR re-test
Buy vs Rent (Lifetime)
Net-worth crossover under both paths
Expat Mortgage
FX haircut, country tier, non-resident SDLT