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For business

Tax should be built, not reconstructed.

OB is the opening balance, line 1 of every set of books. OB1 keeps yours from the first entry, itemised, so nothing is rebuilt at EOFY.

Companies with an ACN

Your books, kept from the first entry.

Australia’s tax automation infrastructure, built for small businesses that want the year already assembled when EOFY arrives.

Opening balance, then every entry

Your file opens with the opening balance on day one. Every entry after it is captured as it happens, not keyed in at month end.

Itemised at the till

SKU level detail comes straight from the terminal, so each line lands in the right account instead of one lump sum per receipt.

A live ledger

Every line is categorised against Australian tax rules and posted to a live ledger, with the receipt attached as evidence.

Reconciliation as you go

Receipts are matched to bank transactions automatically, so reconciliation happens every day instead of in a pile at EOFY.

GST on every line, BAS ready

GST is pulled out of each line item, not estimated from the receipt total. Your BAS figures are ready as the quarter runs.

Your accountant, in the loop

Desktop access to review, adjust and approve the ledger. Less reconstruction. More advisory.

Fin by OB1 Tax

Fin automates preparation. You control approval.

Fin prepares compliant tax submissions for your approval. Every deduction backed by evidence.

Opening balance to EOFY in one continuous, itemised record
BAS figures drawn from the ledger, not rebuilt from statements
Evidence attached to every line for the full record keeping period
Nothing is submitted until you or your accountant approve it
The name

OB is the opening balance. We keep yours from day one.

Line 1 of every set of books is the opening balance, and for most Australian companies the books open on 1 July, the first day of the financial year. OB1 is the record kept from that first entry: itemised, reconciled and BAS ready, so the year is already built when EOFY arrives. Say it O, B, one.

Founding members

Get your company in early.

Take the 3 minute survey and choose Business owner with employees at question 1, so we show you the business features first. Founding members get early beta access before public launch.