Buy-to-Let Calculator | Propreneur

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Financial & quick tools

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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

Offer price (£)

Monthly rent (£)

Finance and operating costs

Monthly mortgage (£)

Insurance (£/month)

Council tax (£/month)

Utilities (£/month)

Management (% of rent)

Maintenance (% of value / year)

Void months / year

Cash invested (for ROI)

Deposit (£)

Legal fees (£)

Survey (£)

Refurb budget (£)

Multi-year hold projection

Hold period (years)

Rent growth (% / year)

Capital growth (% / year)

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

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Optional overrides - mortgage estimate for BTL / commercial

Monthly mortgage preview (£), 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.

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