How it connects
You connect Renttix to Xero through Xero's standard OAuth flow — click Connect in Renttix, approve the organisation you want to link, and you are done. No API keys are copied by hand and no password is ever stored in Renttix. Access tokens refresh themselves in the background, and refreshes are serialised per tenant so two simultaneous payments can never collide and invalidate each other's token. If you ever want out, Disconnect revokes the link immediately. Once connected, you choose what flows across. Customers push from Renttix to Xero as contacts. Tax types are pulled from your Xero organisation so hire lines are coded to the rates you actually use rather than a guess. Payment terms sync so a Renttix invoice inherits the same due-date behaviour it would have if you had raised it in Xero. Suppliers move in both directions — push the ones you hold in Renttix, or pull your existing Xero supplier list in rather than typing it twice. The part that saves the most time is the one you never see. When an invoice is marked paid in Renttix, the matching invoice is settled in Xero against your nominated bank account. The reconciliation that normally waits for someone's Friday afternoon simply does not accumulate.
Why it matters
Hire businesses generate a lot of invoices for their size. Weekly hire runs, part-period charges, damage recharges, extensions agreed on the phone — a modest fleet can produce more invoice lines in a month than a much larger business selling one thing once. When those lines are typed into an accounting package a second time, two things happen: the finance team spends its week on data entry, and the two systems quietly drift apart. That drift is expensive in a specific way. Your rental system says an order is paid; your accounts say it is outstanding. Someone chases a customer who already paid. A credit control report is built on numbers nobody trusts. And at year end the reconciliation work is not a task, it is a project. Keeping Renttix and Xero in step removes the re-keying and the drift together. Your accountant works in the system they know, your operations team works in the one they know, and neither has to reconcile the other's version of the truth. The numbers are the same numbers because they only ever came from one place.
Key workflows
Invoices and paid-back reconciliation
Hire invoices raised in Renttix carry across with the right tax coding and payment terms. When one is marked paid, Renttix settles the matching invoice in Xero against your default bank account automatically — so your aged debtors report reflects reality without anyone reconciling it by hand.
Customers, suppliers and tax
Customer records push to Xero as contacts, and suppliers move in either direction — push from Renttix or pull your existing Xero list in. Tax types and payment terms are read from your Xero organisation, so hire lines are coded to the rates and terms you actually use rather than a default that needs correcting later.
Payroll timesheets (UK)
For UK payroll, costed timesheet hours push into Xero Payroll as draft timesheets — per-day regular and overtime lines, already break-deducted and rounded by Renttix. You preview before anything is sent, and the push only proceeds when you explicitly confirm it.
Xero is one of several accounting connections Renttix supports alongside QuickBooks, Sage, Zoho and MYOB — the same invoice, customer and tax plumbing sits behind each, so the way you work does not change if your accountant does. Renttix stays the system of record for hire: availability, contracts, delivery, damage and utilisation. Xero stays the system of record for your books. The integration exists so neither has to pretend to be the other.
Xero integration FAQ
No — it pushes hours, never money. Renttix sends per-day regular and overtime lines from its costed timesheet engine into Xero Payroll as draft timesheets. Xero remains responsible for pay rates, tax, National Insurance, RTI submissions and payslips. Nothing is filed or paid from Renttix. Xero Payroll support is UK-only; in other regions, payroll hours leave Renttix as a CSV or Sage-format export.
No. A push is blocked if a completed or partial push already covers an overlapping period, because Xero does not de-duplicate timesheet creation and a double push would mean double hours. You always see a preview first — which writes nothing and calls Xero not at all — and the push itself requires an explicit confirmation. Everything is re-derived on the server rather than trusted from the browser.
Existing Xero invoices are left alone. The integration takes effect from the point you connect: new invoices carry across, and paid-back settlement applies to invoices Renttix knows about. Connecting Xero does not rewrite your accounting history.
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