If you are in the UK on a temporary basis, you have an allowance of £2,000 for foreign income. You are allowed not to disclose your foreign income to HMRC if it’s less than £2,000. If foreign income is above that limit and you choose to file your tax return on arising basis, it will become taxable in the UK. When using the remittance basis for taxation, there are no limitations on income earned abroad. Tax is calculated on money remitted to the UK, or you have used foreign resources, i.e., credit card, bank card, or sold any assets to fund your stay in the UK or buy any asset in the UK. Tax calculation on a remittance basis is complex. You can call our tax advisor to discuss your options.