Free tools

Free property investment calculators

Four calculators for the numbers every UK deal appraisal needs. Each one explains its method, shows the pound figures behind every percentage, and links to the full guide on the topic. When you would rather not do this by hand for every listing, PropDetect runs the lot automatically and gives each deal a verdict.

• Stamp duty calculator (SDLT, LBTT and ADS)

  Banded SDLT and LBTT with the additional-property surcharge and Scottish ADS done properly, band by band.

• Bridging loan calculator

  Total cost of a bridge from monthly rate, term and fees, with the monthly-not-annual quoting explained.

• HMO yield calculator

  Gross and net yield on total money in for a room-let HMO, with bills, management and voids included.

• Flip profit calculator

  Profit and margin on GDV for a flip, contingency included, with a down-valuation sensitivity.

• Rental yield calculator

  Work out gross and net rental yield from purchase price, rent and running costs.

• GDV calculator

  Estimate gross development value from comparable sales, with a price-per-sqft cross-check.

• BRRR calculator

  Model buy, refurbish, rent, refinance: cash left in, cashflow and return on the money still in the deal.

• Property ROI calculator

  Return on investment for a purchase and refurb, on a sale or a rental exit.

• Refurb cost calculator

  Kitchen, bathroom, decorating, flooring and electrics priced by condition level and region, with the 15% contingency built in.