# Octobooks

> Octobooks is a double entry accounting ledger for small companies and freelancers in the UK, Germany and Austria, run through the customer's own AI. It connects to Claude and any other MCP client; the AI keeps the books (bookings, bank lines, receipts, invoices, VAT return figures, month close) and the owner sets the switches for what it may release alone. You start free, with no card needed; prices are on the pricing page.

## Product

- [Home (English)](https://octobooks.ai/): what Octobooks is and how it works
- [Home (Deutsch)](https://octobooks.ai/de/): Octobooks auf Deutsch
- [Pricing](https://octobooks.ai/pricing.html): plans and prices
- [Connector documentation](https://octobooks.ai/docs/connector.html): the MCP connector, its address and its tools

## Questions and answers

- [Accounting with AI: questions and answers](https://octobooks.ai/questions/): can Claude or ChatGPT keep the books, what an AI needs for it, safety, VAT, bank reconciliation, month end
- [Buchhaltung mit KI: Fragen und Antworten](https://octobooks.ai/de/fragen/): dieselben Fragen für Deutschland und Österreich

## Guides

- [Guides (UK)](https://octobooks.ai/guides/): CT600, Making Tax Digital for Income Tax, Companies House filing
- [Ratgeber (DE, AT)](https://octobooks.ai/de/ratgeber/): E-Rechnung empfangen, E-Rechnungspflicht 2027, XRechnung, ZUGFeRD, Buchhaltung mit KI, UVA U30, GoBD
- [Österreich](https://octobooks.ai/at/): E/A-Rechnung, UVA über FinanzOnline, Kleinunternehmer, SVS-Beiträge 2026, E-Rechnung an den Bund, ebInterface
- [Kleinunternehmer- und SVS-Rechner 2026](https://octobooks.ai/at/tools/kleinunternehmer-svs-rechner.html): kostenloser Rechner für Österreich, Grenze, SVS und was vor Einkommensteuer bleibt
- [Do I need MTD?](https://octobooks.ai/tools/mtd-checker.html): free UK checker for the MTD for Income Tax start date, with a deadline calendar to download
- [UK Amazon and Shopify fee and VAT calculator](https://octobooks.ai/tools/uk-seller-fees-vat.html): free calculator, what is left per unit before and after VAT registration, with official rates and worked examples
- [What MTD software must do](https://octobooks.ai/guides/mtd-what-software-must-do.html): eight tests for a product and one worked year of quarterly updates
- [AI bookkeeping in the UK](https://octobooks.ai/guides/ai-bookkeeping.html): run one month, five checks and a scorecard
- [Amazon seller accounting UK](https://octobooks.ai/guides/amazon-seller-accounting.html), [Shopify payouts](https://octobooks.ai/guides/shopify-payouts-accounting.html), [VAT for UK online sellers](https://octobooks.ai/guides/online-seller-vat.html): worked entries with figures
- [E-Rechnungspflicht-Check](https://octobooks.ai/de/tools/e-rechnungspflicht-check.html): kostenloser Check je Rechnung für 2027 und 2028
- [Kleinunternehmer-Check](https://octobooks.ai/de/tools/kleinunternehmer-grenze-check.html): kostenloser Check der Grenzen 25.000 und 100.000 Euro für 2026 und 2027
- [Ratgeber UStVA](https://octobooks.ai/de/ratgeber/umsatzsteuer-voranmeldung.html), [EÜR](https://octobooks.ai/de/ratgeber/einnahmenueberschussrechnung.html), [DATEV-Export](https://octobooks.ai/de/ratgeber/datev-export.html): Regeln mit Rechenbeispielen

## Comparisons and templates

- [Compare](https://octobooks.ai/compare/): Octobooks with Xero, with prices from the vendor's own page and when the other product fits better
- [Vergleich](https://octobooks.ai/de/vergleich/): Octobooks mit Lexware Office, sevDesk und FreeFinance, Preise von den Seiten der Anbieter
- [Templates](https://octobooks.ai/templates/): free Excel invoice template for the UK
- [Vorlagen](https://octobooks.ai/de/vorlagen/): kostenlose Rechnungsvorlagen für Deutschland und Österreich, E/A-Rechnung in Excel

## Company

- [Imprint](https://octobooks.ai/imprint.html), [Privacy](https://octobooks.ai/privacy.html), [Terms](https://octobooks.ai/terms.html)

## Making Tax Digital for Income Tax (UK sole traders and landlords)
- [What is Making Tax Digital for Income Tax (MTD ITSA)?](https://octobooks.ai/questions/what-is-making-tax-digital-for-income-tax.html): MTD for Income Tax (MTD ITSA) means digital records and quarterly updates to HMRC for sole traders and landlords over £30,000 from April 2027.
- [Do I need Making Tax Digital from April 2027?](https://octobooks.ai/questions/do-i-need-making-tax-digital-from-april-2027.html): Sole traders and landlords with qualifying income over £30,000 in 2025 to 2026 must use MTD for Income Tax from 6 April 2027. How to check and prepare.
- [What is qualifying income for Making Tax Digital?](https://octobooks.ai/questions/what-is-qualifying-income-for-making-tax-digital.html): Qualifying income for MTD is your self-employment and property turnover before expenses. What counts, what does not, and HMRC's worked examples.
- [What are MTD quarterly updates, and when are they due?](https://octobooks.ai/questions/what-are-making-tax-digital-quarterly-updates.html): MTD quarterly updates are cumulative totals sent to HMRC by 7 August, 7 November, 7 February and 7 May. Periods, nil updates, corrections, penalties.
- [Which accounting software works for Making Tax Digital for Income Tax?](https://octobooks.ai/questions/which-software-works-for-making-tax-digital-for-income-tax.html): Any product on HMRC's list of MTD for Income Tax compatible software. How to choose: record keeping or bridging software, free products, landlords, agents.
- [Can AI do Making Tax Digital for Income Tax for me?](https://octobooks.ai/questions/can-ai-do-making-tax-digital-for-income-tax.html): AI can keep your MTD digital records, sort them into HMRC categories and prepare quarterly updates. The sending runs through HMRC compatible software.
- [Can Claude do Making Tax Digital?](https://octobooks.ai/questions/can-claude-do-making-tax-digital.html): Claude can keep MTD digital records and prepare quarterly figures through a connector to your ledger. Sending to HMRC runs through compatible software.
- [Making Tax Digital for landlords: what changes in April 2027?](https://octobooks.ai/questions/making-tax-digital-for-landlords.html): Landlords whose rent plus any self-employment passed £30,000 join MTD for Income Tax in April 2027. Joint ownership, joint lets, foreign property, SA105.
- [Can I use a spreadsheet for Making Tax Digital for Income Tax?](https://octobooks.ai/questions/can-i-use-a-spreadsheet-for-making-tax-digital.html): Yes, with bridging software that links your spreadsheet to HMRC for quarterly updates and the tax return. What to watch, and when a ledger is easier.
- [What are the penalties for Making Tax Digital for Income Tax?](https://octobooks.ai/questions/what-are-the-penalties-for-making-tax-digital-for-income-tax.html): MTD uses penalty points: one per late quarterly update, £200 at 4 points. No points for late updates in 2026 to 2027. Late returns still count.
- [Who is exempt from Making Tax Digital for Income Tax?](https://octobooks.ai/questions/who-is-exempt-from-making-tax-digital-for-income-tax.html): Automatic MTD exemptions (£20,000 or less, no NI number, some reliefs) and the digitally excluded application, with the reasons HMRC will not accept.
- [Under MTD, what happens to my tax return and the final declaration?](https://octobooks.ai/questions/what-happens-to-my-tax-return-under-making-tax-digital.html): Under MTD for Income Tax you still send a tax return for the year, through your software, by 31 January. What the final declaration and EOPS are.