Let's get you
Airtight.
Ask Bella to draft the BAS, match the bank lines or remind a late payer. She drafts, you approve. Every posted entry leaves a signed receipt.
Debit, credit, receipt — on every posted entry.
The people who keep the books honest.
One platform. One signed ledger underneath. Pick the door that looks like you.
Invoicing, BAS/GST preparation, SMSF records, R&DTI preparation. Ask Bella, review what she drafts, approve.
Payroll, inventory, multi-currency, R&DTI preparation, projects. One ledger for the whole business.
Client roster, engagements and lodgement tracking on the same ledger as the client books. Airtight prepares. You lodge.
Accounting software wasn't
built for the AI age.
Xero still waits for you to code the line. Ask Bella and she drafts it — you approve. And not one of the incumbents has cryptographic proof of a single transaction. We started from the opposite end — what does accounting look like when the ledger itself is the evidence?
See the architectureBuilt for Windows 3.1. Ported to the web. AI added as an afterthought. No cryptographic integrity, no immutable audit trail.
A cloud-native double-entry ledger. Beautiful UI. The architecture is unchanged since 1494. Bolt-on AI can't fix structural limits.
Australian-first, Windows-era desktop DNA. AI is a sidecar, not a spine. Compliance modules are tacked on, not integrated.
Not accounting with AI.
AI-native accounting.
Four architectural pillars no legacy platform has — or can easily retrofit.
A receipt on every posted entry
Every journal entry posted to the ledger gets an Ed25519-signed receipt linked into a SHA-256 hash chain, so a later change to it is detectable. Drafts, bank lines and imports are not receipted until they are posted. The detail is on the Security page.
Debit · Credit · ReceiptBella, your accountant on call
Ask in plain English. Bella pulls numbers from your books and drafts entries, invoices and returns for your approval. She works while you are in Airtight, not overnight. BAS, STP and R&DTI are prepared here and lodged by you or your agent.
Auto · Guarded · OffIsolated by design
Row-level security on every tenant table, so one organisation cannot read another. Employee tax file numbers, bank details and payment-gateway credentials are sealed with per-organisation envelope encryption. The detail is on the Security page.
Row-level security · Envelope encryptionSpecialist modules, one ledger
SMSF register, R&DTI preparation, statutory client trust accounts, AU payroll, scoped auditor access, AFSL records, GCC e-invoice preparation, inventory, projects, assets and leases. One login, one ledger, no bolt-ons.
One ledger · one loginConnect. Ask. She runs the tight stuff.
Bring in your books and your evidence
Connect Xero directly, or upload CSV exports from Xero, QuickBooks and MYOB. Import bank statements as CSV or OFX, or connect Australian banks through open banking where it is enabled. Add R&D evidence (timesheets, lab notes, supplier invoices) as you go.
Airtight prepares the claim
Airtight suggests classifications of eligible expenditure, links evidence, and prepares the R&D Tax Incentive Schedule data and registration details. Suggestions, not decisions. You stay in control.
Your tax agent reviews and lodges
Bring your registered tax agent into Airtight to review and sign off, then lodge through their own ATO Online Services. Don't have one? Browse the partner directory — Airtight takes no fee for listings or introductions.
AI prepares.
Your tax agent approves.
You decide.
Airtight is preparation software. Every R&DTI claim is reviewed and lodged by a registered Australian tax agent under their own Tax Practitioners Board registration — not by us, and not by an algorithm.
Airtight is not a registered tax agent and does not provide tax, legal or financial advice.
You already have a registered tax agent. Invite them in.
Your agent gets a free seat inside Airtight. They review the prepared claim, sign off, and lodge through their own ATO Online Services. You stay the claimant; they stay the agent.
Browse the partner directory — no fee from Airtight.
The partner directory lists registered tax agents that Airtight has reviewed. Contact a firm through its website. Airtight does not receive any fee from your tax agent for a listing or an introduction. Your agent's engagement and fees are independent of Airtight.
Everything accountants
quietly charge you for.
No "enterprise" wall. Every specialist module posts to the same ledger — one schema, one login, one source of truth.
- Chart of accounts
- Journals
- Bank import (CSV, OFX)
- Reconciliation
- FX rates
- Multi-entity consolidation
- Quotes
- Invoices
- Recurring
- Statements
- Payment links (Stripe)
- Overdue reminders
- BAS / GST preparation (AU)
- STP 2 records (you report)
- TPAR file
- R&DTI preparation
- GCC e-invoice preparation
- GCC VAT + Corporate Tax preparation
- SMSF register
- Statutory client trust accounts
- AFSL records
- Leases (AASB 16)
- Inventory
- Fixed assets
- Ask Bella
- Anomaly scans (on demand)
- Cash-flow forecast
- Bank rules
- Approval cards for every change
Airtight vs the ledgers
that started in the 90s.
Every honest head-to-head. No asterisks. You can switch any time — bring your history across from Xero directly or from CSV exports of Xero, QuickBooks and MYOB.
✓ Included · ≈ Partial or paid add-on · — Not available
People who've put
Bella to work.
I ask Bella what I owe, she shows the working, and I approve the BAS draft. I still lodge it myself.
Every posted entry has a receipt I can show my accountant. The audit trail answers the question before it is asked.
One login per client, and the receipt trail sits next to the books. That is what I show a client who asks what changed.
Composite quotes, for illustration.
Pricing you can actually read.
Four tiers. No per-seat multiplier. No "call us". Switch plans any day; we pro-rate.
Sole trader or single-entity SME.
- 1 entity
- Bank import and reconciliation
- BAS/GST preparation
- Signed receipts on posted entries
Multi-entity, payroll, invoicing.
- Up to 3 entities
- Payroll (AU, STP records)
- Invoicing with payment links
- Multi-currency
Firms, funds, trusts, R&DTI, SMSF.
- Up to 10 entities
- SMSF register + statutory trust accounts
- R&DTI claim preparation
- Practice-manager tools
10+ entities, custom SLAs, onboarding.
- 10+ entities
- Custom SLAs
- Dedicated onboarding
- Priority support
Ask Bella.
Review. Approve.
Bella works when you ask. You review and approve. Every posted entry leaves a signed receipt.
SOC 2 + ISO in progress