Belgian rent indexation, done right
Region-aware calculation (Flanders, Brussels, Wallonia) on the health index. See who is eligible and apply the new rent in one click, with a full audit trail.
Vlaanderen · Brussel · WalloniëThe platform
Everything you need to manage rentals — in one place
Cynsio brings indexation, bank reconciliation, follow-up and reporting together. Built for the Belgian rental market, from 1 to 10,000+ units.
Automatic bank reconciliation
Connect your bank (secure, read-only) and Cynsio matches incoming payments to the right lease automatically — on amount, reference and IBAN.
Always know who paid
A live overview of paid, late, partial and missing rent per tenant, building or your entire portfolio.
Automated reminders & dunning
Friendly reminders before and after the due date, sent automatically, with escalation steps when they are needed.
Payments dashboard & cashflow
Monthly summaries and an annual cashflow projection so you see the money before it lands.
Leases, units, tenants & owners
One source of truth for properties, units, leases and contacts — designed to scale with you.
Letters & documents
Generate and send template letters, and keep EPC labels and key dates tracked per lease.
Compliance & audit built in
User roles, a full audit trail of every action, EU hosting and privacy by design.
On the roadmap
AI assistant · accounting integrations (Yuki, Exact, Octopus) · tax export · document vault · accountant portal · maps
Get started
Stop chasing rent. Start collecting clarity.
Connect your bank, set expected rent, and let Cynsio handle tracking, reminders and indexation — in minutes.
Request early access
We’re inviting an initial group of landlords and property managers to get early access and help shape Cynsio based on real-world workflows.