5 Best Tax Services in London (2026)

TaxSimba Group Limited is a London accountancy and chartered accountant practice built around self-assessment tax returns, filed HMRC-ready and supported end to end. The firm operates from Bloomsbury Square with regular Monday-to-Friday hours, working with individuals and small businesses on annual filings. Its website leads with the promise 'Tax return? Done,' and the reviews back that up: clients describe fast turnarounds, even people filing from outside London.

WLH Tax is a specialist tax investigation practice on Maddox Street, built specifically around HMRC enquiries: tax fraud and evasion cases, VAT investigations, and the serious end of the system under Code of Practice 8 and 9. Rather than handling everyday returns, the firm's whole service is structured around defending clients through HMRC's compliance and fraud investigation processes, with a free initial meeting offered before anything is engaged.

PwC's Embankment office operates as an accountant practice on the north bank of the Thames near Villiers Street, a five-minute walk from Charing Cross and Embankment stations. Google's review set for this listing leans heavily on visitor and office impressions rather than tax-return specifics: people describe the building, the views from upper floors, and in one case a walk-in CV drop-off rather than commissioned tax work.

Perrys Chartered Accountants runs a Strand branch as part of a seven-office network, offering chartered accountancy, bookkeeping and tax advisory work led by audit compliance partner Declan McCusker alongside Jamie Russell, Scott Jiggins and colleagues. The firm positions itself against the larger City firms on price, aiming for the same standard of advice at lower fees, and offers a free initial consultation to new clients.

TaxYork is a specialist US expat tax practice on Noel Street, built specifically around the IRS Streamlined Filing Program for Americans living abroad who have fallen behind on US returns. Beyond streamlined filings, the firm handles annual US tax returns, FBAR and FATCA reporting, and double taxation relief through UK-US tax treaties. It's a narrow niche, but a real one: dual citizens and accidental Americans in London have few local options for this exact problem.