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OneSixth
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OneSixth

Simplify margin VAT, TOMS and partial exemption across Xero, QuickBooks Online, Sage and FreeAgent. Built for UK accounting professionals.

Product

  • How It Works
  • Features
  • Pricing
  • Join the beta
  • Changelog

Solutions

  • VAT margin schemes
  • Tour Operators' Margin Scheme
  • Partial exemption
  • Free guides

Resources

  • Help centre
  • Plans & pricing policy
  • de minimis blog
  • Free guides
  • Support
  • Changelog

Trust

  • Trust Centre
  • Security
  • Sub-processors
  • DPA

Legal

  • Privacy Policy
  • Terms & Conditions
  • Cookie Policy
  • Terms of Use

OneSixth is a trading name of Option To VAT Limited, a company registered in England & Wales (company number 15668306). Registered office: One Express C/O Beever And Struthers, 1 George Leigh Street, Manchester, M4 5DL, United Kingdom. VAT registration number 523 3658 94 (effective 1 August 2026). Registered with the UK Information Commissioner's Office, registration number ZC197273. Contact: support@onesixth.app.

Not tax advice. OneSixth provides VAT margin scheme, partial exemption and TOMS calculations from data you and your connected accounting platform supply. It is a software tool — not tax, legal or accounting advice. You remain responsible for reviewing every calculation and journal before submission to HMRC. For advice specific to your circumstances, consult a qualified tax adviser.

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© 2026 Option To VAT Limited. All rights reserved.

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