P propCALC.uk
Get Propreneur free
propcalc.uk by Propreneur Free UK calculators · no sign-up
Compare tools

Deal strategies

Strategy R2R SA BTL HMO BRR Flip BMV Commercial Development

Financial & quick tools

NPV / IRR DSCR Multiples CoC / ROE LTV Breakeven SDLT Bridging Mortgage Yield BTL ROI Void Skip CGT Affordability Refurb Snagging

About this calculator

Classic buy-to-let underwriting with gross/net yield, cashflow, ROI, stress test, and optional 5-year hold projection.

Related tools

Did you know?

Additional-property SDLT surcharge applies to most investor purchases in England and NI. Section 24 limits mortgage interest relief for individual landlords.

UK context

Standard buy-to-let: BTL mortgage to 75% LTV, additional-property SDLT surcharge applies, Section 24 caps interest relief at the basic rate.

Calculator

Buy-to-Let

Model gross yield, net cashflow, ROI, and illustrative stress using purchase price, rent, and optional mortgage payment.

Inputs

Property and income

Finance and operating costs

Cash invested (for ROI)

Multi-year hold projection

Projects net cashflow and property value uplift over the hold period (interest-only mortgage).

Run calculator

Runs against the live API. Nothing is stored. Use Sign up to save results.

Sensitivity scenarios

Sign up to save deals

Create a free Propreneur account to save these numbers against a property.

Optional overrides - mortgage estimate for BTL / commercial

Uses offer price, monthly rent, and monthly expenses (x12 as annual opex) from the form above.

Show working

See every formula, your numbers plugged in step by step, and where each cost comes from. No other UK property calculator shows its maths like this.

Save your numbers and get the next step

Email yourself this run so you do not have to rebuild it later. We will include the result, the assumptions, and the next Propreneur step for saving deals and tracking follow-up.

Run the calculator first. The email uses your latest numbers.

Phone is optional and only for direct follow-up. You can keep calculating without submitting this form.

Saved - check your inbox shortly.

Create a free Propreneur account to keep calculators, deal notes, follow-ups, and portfolio tracking in one workspace.