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A single source of truth
Properties, contracts, guests, bank accounts, mortgages and documents live in the same place and talk to each other: a rent payment updates the balance, the forecast and the estimated tax.
Launching soon — iOS and Android
One place for your properties, guests, accounts and taxes.
RENTAX is the platform for people who run holiday rentals and B&Bs and for people who invest in property: bookings, compliance, bank movements, mortgages and tax deadlines together — for individuals and sole traders.
Why RENTAX
Today it takes five tools. One is enough.
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Taxes computed, not guessed
The tax engine knows the rules of your country of residence and of the countries where your properties are, applies them to your real numbers and updates when the law changes.
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Documents that fill themselves in
Upload a lease, a mortgage contract, a payslip or an invoice: RENTAX reads the data and fills in the records for you.
Hosts · holiday rentals, B&Bs, short lets
A host's whole day, in one app.
Operations
- Calendar and bookings from every channel, with availability kept in sync.
- Online guest check-in, automated messages, house guidebook.
- Cleaning and maintenance scheduling with staff notifications.
- Rate plans and tourist taxes per property.
Compliance and money
- Mandatory reports to authorities and statistics portals, prepared from booking data.
- Payouts reconciled against bank account movements.
- Receipts and invoices under each country's tax regime.
- The real margin of each property, net of commissions, costs and taxes.
Investors · owners, landlords, wealth
Every property with its own P&L and tax burden.
Assets and cash flows
- Properties, leases, rents, deadlines and indexation.
- Mortgages with the real amortisation schedule and deductible interest.
- Bank accounts connected through Open Banking: balances and movements in real time.
- 3- and 24-month cash-flow forecasts.
Taxes and decisions
- Annual estimate of income and property taxes, updated with every movement.
- Regime comparison (for example flat-rate vs ordinary taxation on rents) contract by contract.
- Tax calendar with deadlines and expected amounts.
- "What if" simulator: a new purchase, a sale, a change of regime.
Tax engine
Built country by country, from official sources.
RENTAX applies the rules of the user's country of residence and handles cross-border cases (resident in one country, property in another). A country goes live only when its coverage is complete and verified; the rollout starts with Italy and Switzerland and continues across Europe, the United Kingdom, the United Arab Emirates and the United States.
ItalySwitzerlandFranceGermanySpainUnited KingdomNetherlandsLuxembourgUnited Arab EmiratesUnited States
Official sources
Rates, brackets, deductions and deadlines come from each country's official publications and are updated with periodic checks.
Continuous verification
Every calculation is covered by tests against reference cases; a discrepancy blocks the release.
Transparency
For every tax the app shows the step-by-step computation and the rule applied. Estimates do not replace professional advice.
The company
CKM SOFTWARE S.R.L.
CKM SOFTWARE S.R.L. is an innovative start-up based in Trani (Apulia, Italy), registered in the special section of the Italian Business Register. It develops and publishes RENTAX, the property-management and tax platform for hosts and investors. The team combines first-hand experience in managing properties and hospitality businesses with financial software development.
The RENTAX apps for iOS and Android are launching soon; the web version will follow. For information, partnerships or press write to [email protected].
- Legal name
- CKM SOFTWARE S.R.L.
- Registered office
- Via Postumia 9, 76125 Trani (BT), Italy
- VAT / Tax ID
- IT09206340722
- Business Register
- REA BA-679299 — innovative start-up
- Certified email (PEC)
- [email protected]
- [email protected]
- D-U-N-S
- 302778504
Contact