Run the maths on any deal.
13 calculators, one place. Each one's free, no sign-in for one-off use, save unlimited scenarios on Pro.
Investment inputs
Standard rental on an Assured Shorthold Tenancy. Single household, market rent, paid monthly direct to landlord (or via agent).
Deal
Mortgage
Stress + tax
Rent + costs
Outputs · BTL
- Cash needed
- £49,398
- Gross yield
- 7.60%
- Net yield on cash
- -0.22%
- Tax (annual)
- £1,989
- Monthly cashflow
- -£9
Other tools in this hub12 more
SDLTPopular
UK Stamp Duty (SDLT), Scottish LBTT, Welsh LTT — first-time buyer relief and 5% additional-property surcharge.
Tax year 2026/27Affordability
Income → max mortgage → max purchase price. DTI ratio, +2% stress test, and matching properties.
MortgagePopular
Monthly payments, affordability, full amortisation schedules — residential and buy-to-let with IO toggle.
AffordabilityOverpaymentPopular
Overpay your mortgage monthly or with a lump sum — see how many years sooner it clears, the interest saved, and the 10% ERC allowance.
NewBRRRR
Buy, Refurbish, Rent, Refinance, Repeat — bridging cycle, refi cash recycled, cash-left-in projection.
StrategyRental YieldPopular
Gross and net rental yields with full operating expense breakdown and yield ratings.
Capital Gains Tax
CGT on property sales — Private Residence Relief, Letting Relief, and exemptions for the current tax year.
Tax year 2026/27Heat MapPopular
Visualise UK property investment opportunities — yield data, Article 4 areas, and market metrics.
Compare scenarios
Compare multiple saved scenarios side-by-side across calculators. Diff highlighting on every field.
Market data
City-level yields, medians, momentum — live metrics from Dwelfy's UK property database.
Rent vs Buy
Year-by-year cost comparison: should you buy now or keep renting? Includes SDLT, mortgage interest, opportunity cost of deposit.
Rent Affordability
What rent can you actually afford? Net income → housing budget with the 30/30/3 rule of thumb baked in.
Suggest a tool
What's missing? Tell us — we add what investors need.