Skip to main content
Tools

Run the maths on any deal.

12 calculators, one place. Each one's free, no sign-in for one-off use, save unlimited scenarios on Pro.

Investment inputs

Standard rental

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 · Standard rental

Cash needed
£49,398
Return before costs
7.60%
Return after costs on cash
-0.22%
Tax (annual)
£1,989
Monthly profit
-£9
Rent-covers-mortgage check 1.30 · stress 7.5% · Below target

Other tools in this hub11 more

Stamp dutyPopular

UK Stamp Duty (SDLT), Scottish LBTT, Welsh LTT — first-time buyer relief and 5% additional-property surcharge.

Tax year 2026/27

Affordability

Income → max mortgage → max purchase price. DTI ratio, +2% stress test, and matching properties.

MortgagePopular

Monthly payments, affordability, full Loan paid down over time schedules — residential and buy-to-let with IO toggle.

Affordability

OverpaymentPopular

Overpay your mortgage monthly or with a lump sum — see how many years sooner it clears, the interest saved, and the 10% Early-exit mortgage fee allowance.

New

Do it up, then remortgage

Buy, Refurbish, Rent, Refinance, Repeat — bridging cycle, refi cash recycled, cash-left-in projection.

Strategy

Rental YieldPopular

Gross and net rental returns with full operating expense breakdown and Annual return ratings.

Capital Gains Tax

CGT on property sales — Private Residence Relief, Letting Relief, and exemptions for the current tax year.

Tax year 2026/27

Heat MapPopular

Visualise UK property investment opportunities — Annual return data, Council planning restriction areas, and market metrics.

Compare scenarios

Compare multiple saved scenarios side-by-side across calculators. Diff highlighting on every field.

Commercial Property

Net initial yield on a shop, office or unit — non-residential SDLT, FRI vs IRI, empty rates on a void, and the valuation the income supports.

UK commercial

Market data

City-level Annual returns, medians, momentum — live metrics from Dwelfy's UK property database.

Suggest a tool

What's missing? Tell us — we add what investors need.