The company stays taxed in the UK
Moving abroad does not turn your company into an offshore entity. A company incorporated in the UK is automatically UK tax resident under the incorporation rule, so it continues to file a CT600 and pay corporation tax at 19% or 25% (with marginal relief between £50,000 and £250,000 of profit) whether you live in London or Lisbon. Every Companies House obligation also continues, including annual accounts and the confirmation statement, and penalties for missed deadlines apply regardless of where the director sits.
The trap: your new country's claim on the company
The bigger risk runs the other way. If you make the company's key decisions from where you now live, that country may treat the company as tax resident there under its own management-and-control rules, and a home office or habitually concluding contracts locally can create a permanent establishment whose profits it can tax. Modern treaty tie-breakers no longer resolve dual residence automatically: under many treaties the two tax authorities must agree a single residence, and treaty benefits can be withheld until they do. Our guide to running a UK company from abroad covers these rules in depth.
What to do before you move
Take advice before you leave, because these problems are far cheaper to design out than to unwind. Map where the company's decisions will really be made, check the tax treaty between the UK and your destination, and plan how you will pay yourself: dividends carry no UK withholding tax, while salary is taxed where the duties are physically performed, and directorship duties carried out in the UK can still trigger PAYE. If you are settling abroad permanently with mainly local clients, compare keeping the UK company against incorporating locally or closing the UK company.
