Fair cost sharing
Define ownership, usage, staircase or heating shares for each building. Every expense is split by the right table, automatically.
QuickMastro Dominius
Dominius is professional software for condominium, HOA and co-ownership administrators. Split costs by ownership share, issue instalments, match bank payments automatically and close the year with confidence — with your data safe on your own computer.
Full version during the trial · No credit card · Windows 10 and 11

From the budget to the owners' statements, Dominius follows the way community accounts really work.
Define ownership, usage, staircase or heating shares for each building. Every expense is split by the right table, automatically.
Generate budget instalments on the schedule you choose. Each instalment carries its own payment code.
Owners quote the code in their transfer and Dominius matches your bank statement lines to the right instalments.
Every operation posts to a chart of accounts you can customise, with ledgers, trial balance and automatic balance checks.
Close the year, carry the balances forward and reopen a closed year if you must correct something — everything is logged.
Plan major works over several years with their own bank account, fund and payment plan, and charge each year only its share.
Prepare the agenda, calculate attendance and quorum by ownership share and produce clear minutes.
Send payment requests, statements and reminders by email or SMS, and print professional documents in a click.
Download the installer and run it on a Windows computer. You work from your browser, locally or across your office network.
Enter your buildings, owners, units and ownership shares, or start from the opening balances of the previous administrator.
Budgets, instalments, payments, accounts and reports are all in one place, ready for your owners and your meetings.
A clear, fast interface designed for people who work with accounts every day.




Accounting rules are checked by more than 500 automated tests, and balances are verified at every step.
Archives live on your computer or your own server. Passwords, bank details and signatures are stored encrypted.
Write to us and you get a clear reply from the team that builds the software — no ticket maze, no call centre.
Choose the number of buildings and workstations you need. Every licence includes all features.
€0
30 days, all features
€50
per accounting year · Prices include all taxes. No extra charges.
€100
per accounting year · Prices include all taxes. No extra charges.
€200
per accounting year · Prices include all taxes. No extra charges.
A licence covers one accounting year. Previous years always remain accessible.
Yes. The trial lasts 30 days, includes every feature and needs no payment details. Your archives stay on your computer and unlock when you enter your licence key.
A licence covers one accounting year. Previous years stay accessible. Units and owners are unlimited in each building; the limit is the number of buildings you manage and the number of workstations.
On your own computer or server. Internet is only needed for email and SMS. Passwords, bank details and signatures are stored encrypted.
Yes. On a local network, other computers in your office use the same archive from the browser, with users, roles and permissions per building.
The application interface is available in English and Italian, and you can choose the currency used in amounts and printouts. This website is available in several languages.
Dominius focuses on community administration and accounting: shares, budgets, instalments, payments, ledgers and reports. It does not prepare national tax returns.
Condominiums, homeowner associations, co-ownerships, cooperatives and any shared-ownership community where costs are split by shares.
Yes. Enter the opening balances handed over to you, check that they balance, and continue. Each new year carries forward the closing balances of the previous one.
Download the free 30-day trial and set up your first building today.