UK landlords, buy-to-let investors and small portfolio managers comparing properties before making an offer.
Jak działa
- Label the property, for example "12 Mill Lane, LS6".
- Enter the purchase price and the expected monthly rent.
- Choose the region and whether this is an additional dwelling.
- Adjust void weeks, management fee and costs, then read the net yield against gross.
Co zyskujesz
- Calculates the real stamp duty a UK landlord owes — including the additional-dwelling surcharge most gross-yield sums skip — and shows the true net yield against money actually invested.
Zrzut ekranu

Szczegóły techniczne
Jak zaczac i uzywac
- Kup licencje — klucz (lic_...) pojawi sie na stronie zamowienia i w e-mailu.
- Zaloguj sie na app.synoriaai.com kluczem licencji.
- Bez instalacji — produkt dziala w przegladarce, na Twojej izolowanej instancji.
- 1. Enter a label for the property (e.g., '12 Mill Lane, LS6') so you can find it later.
- 2. Fill in the purchase price, expected monthly rent, and select your region (England, Scotland, or Northern Ireland).
- 3. Add annual costs like void weeks or letting agent fees, plus any one-off purchase costs (e.g., legal fees).
- 4. Click 'Calculate' to see your gross and net yield side by side, with stamp duty and surcharges already deducted.
- 5. Save the property by its label; recalculating updates the same entry instead of creating a duplicate.
Najczęstsze pytania
Does the calculator include the additional dwelling surcharge for second homes?
Yes, the surcharge is automatically applied based on the region you select, which is often missed in basic yield calculators.
What data do you store about my property?
Only the label, price, rent, costs, and region you enter. We don't collect personal data or share your entries with third parties.
Does it handle Scotland's LBTT or only England's SDLT?
It supports both: SDLT for England and Northern Ireland, and LBTT for Scotland, using the published residential bands for each.
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