Rhombus Accounting is a UK-based accountancy firm specialising in businesses operating under the VAT Margin Scheme, particularly in sectors such as watch dealing, jewellery and used car sales. Founded in November 2022, it is registered in Goole, East Riding of Yorkshire. The firm offers a subscription-based model with tiered packages (Silver, Gold, Diamond) that cover services from statutory accounts, corporation tax, payroll and bookkeeping to management information, funding support and business strategy. They operate a secure client portal (available via web and mobile apps) for uploading documents, viewing services and interacting with the team. Rhombus positions itself as more than a compliance provider — its aim is to help clients retain profit, reduce tax liabilities, and gain clarity over financial performance so they can focus on growing their business.