Live · document-level The till and the ledger,
one system.
OneBooks and LithosPOS are built to run together. Connect once over OAuth and every sale, payment and return becomes a real accounting document — Tax-ready on every line, tenders in the right accounts, books ready when the shift ends.
Real documents
every sale is an invoice, every refund a credit note
Free, forever
OneBooks is $0 for LithosPOS customers
One OAuth
authorize in a minute, revoke any time
From counter to ledger in three steps.
Connect
Authorize OneBooks from LithosPOS over OAuth 2.0 — no keys to paste, nothing to rotate.
Map
Point sales categories at income accounts and tenders at cash or bank — cash to cash, card to bank.
Trade
Sales, payments and returns post as they happen; the day close ties out to the ledger automatically.
Real documents, not a lump at day end.
Each LithosPOS transaction becomes the same kind of accounting document you would have created by hand — which means the reports, aging and Tax-ready return are all simply right.
LithosPOS · Day close
Posted automatically- ✓ Sales become invoices — with line items, Tax-ready per line and the customer where one is known.
- ✓ Tenders become payments — cash, card and split tenders land in the cash or bank account you mapped.
- ✓ Returns become credit notes — revenue and Tax-ready reverse correctly, and the refund tender is checked against the return before anything posts.
- ✓ Replay-proof — every session and document carries an idempotency key, so a retried push can never post twice.
- ✓ Period-safe — closed or locked accounting periods reject late postings instead of silently accepting them.
Books that are done when the shift is.
No end-of-day export, no re-keying, no month-end surprise. The accountant sees the same live ledger the manager does.
- ✓ Live reports — P&L, cash and Tax-ready position reflect today's trading before you've locked the door.
- ✓ Bank reconciliation that works — card settlements land in the bank account, so statement lines match.
- ✓ The Tax-ready return is complete — output tax from the till flows into the same tax reports as your manual invoices.
- ✓ Free plan included — the full OneBooks product, forever, for LithosPOS customers.
LithosPOS integration — common questions
What does it cost?
Nothing. OneBooks is free forever for LithosPOS customers — the full product, no feature cuts. The Free plan applies automatically once the connection is authorized.
Does it post summaries or individual sales?
Individual documents: each sale is an invoice, each tender a payment, each return a credit note. That is what keeps aging, reconciliation and tax reports exact.
How are refunds handled?
A return posts a credit note that reverses revenue and Tax-ready correctly, and the refund tender is validated against the return total before anything is written.
Can a retry double my revenue?
No. Every push carries an idempotency key; a replayed or overlapping request is recognized and rejected instead of posting twice.
Connect it this afternoon.
Start free, connect the till, and stop re-keying sales into your books forever.