UK buy-to-let calculator

Model a buy-to-let property using purchase price, rent, mortgage assumptions, refurbishment, acquisition costs and ongoing property costs. DealStack shows the capital required and the monthly economics behind the headline yield.

Analyse a property free

Monthly cash flow after operating costs

Use DealStack's detailed underwriting inputs and calculation breakdowns to see how this part of the deal affects the overall result.

Gross and net rental yield

Use DealStack's detailed underwriting inputs and calculation breakdowns to see how this part of the deal affects the overall result.

Cash-on-cash return and capital required

Use DealStack's detailed underwriting inputs and calculation breakdowns to see how this part of the deal affects the overall result.

LTV, ICR and downside stress

Use DealStack's detailed underwriting inputs and calculation breakdowns to see how this part of the deal affects the overall result.

Why use DealStack?

Many property calculators stop at gross yield. DealStack is designed for deeper underwriting: purchase costs, finance, operating expenses, stress scenarios, professional constraints, saved deals and exportable reports. You can start with manual inputs and move into paid reporting or live property-data lookup only when you need it.

How it works

Choose a property you are already considering.
Enter or retrieve the purchase, income, cost and finance assumptions.
Review the calculated outcomes and open any result card to see the underlying calculation.
Stress-test the deal and compare it with your investment criteria.
Save the analysis or export a professional report when required.

Frequently asked questions

What does the BTL calculator include?

It includes purchase price, transaction and acquisition costs, refurbishment, mortgage finance, management, maintenance, voids and itemised ongoing property costs.

Can I model a cash purchase?

Yes. Cash purchase mode removes mortgage debt service and mortgage-specific acquisition costs from the underwriting.

Does it include UK tax advice?

No. Transaction-tax estimates are modelling inputs and outputs; personal tax, legal and financial advice remain outside the calculator.