Tax & finance
expat-services.ch lists 4 hand-checked English-speaking tax advisors in Basel: BC IT, Findea (incl. Taxea), SAS Tax Experts & Accounting and TaXperts.
Besides English, they also work in German, French and Italian. Every profile shows the services, languages and contact details, checked by hand before going live. See also Lawyers and notaries in Basel.
4 providers
Basel firm offering expat tax returns and accounting for private clients, plus help with contracts, authorities and financial planning; serves clients across cantons.
Checked by our editors · not yet confirmed by the business.
Is this your business?Digital fiduciary with offices across Switzerland: accounting, payroll and tax for start-ups and SMEs; its Taxea service files tax returns for individuals and expats.
Checked by our editors · not yet confirmed by the business.
Is this your business?US and Swiss tax preparation, accounting and payroll for individuals and businesses, with a focus on American and English-speaking expats in Switzerland.
Checked by our editors · not yet confirmed by the business.
Is this your business?Boutique firm focused solely on individual taxation: Swiss and US tax returns and global mobility tax support for people living and working in Switzerland.
Checked by our editors · not yet confirmed by the business.
Is this your business?Local facts
Returns for 2025 were due on 31 March 2026, with a free online extension to 30 September 2026; further extensions and reminders cost CHF 40 (Steuerverwaltung BS, checked ). Filing runs through eSteuern.BS and BalTax Online, which need an ePortal login with AGOV; the Steuerverwaltung (Fischmarkt 10) offers personal help with BalTax Online and the AGOV registration through a help point (Steuerverwaltung BS, checked ) (Kanton Basel-Stadt, checked ). The city's tax multiplier is 100% of cantonal tax (2026) (Steuerverwaltung BS, checked ), and the cantonal income tax rate is 21% (2026) (Steuerverwaltung BS, checked ), rising in the upper brackets (Steuerverwaltung BS, checked ). Church tax, 8% of cantonal income tax for members of the recognised churches, has been billed by the Steuerverwaltung since 2021 (Steuerverwaltung BS, checked ).
Foreign employees without a C permit are taxed at source. Above CHF 120,000 of such income a year an ordinary assessment follows; anyone resident can request one by 31 March of the next year, the request cannot be withdrawn, and deductions such as pillar 3a count only in that assessment (Steuerverwaltung BS, checked ). A wrong tariff or gross wage can be corrected with a recalculation request by the same date (Steuerverwaltung BS, checked ). Weekly residents whose main home is in another canton owe no Basel return (Steuerverwaltung BS, checked ).
Newcomers register with the Einwohneramt of Bevölkerungsdienste und Migration at Spiegelgasse 6; from 2 November 2026 its counters work from a temporary building on Schwarzwaldallee, opposite Badischer Bahnhof. The deadline is 14 days (2026) (Einwohneramt BS, checked ): the date of the online booking counts, not the date of the appointment. Registration costs CHF 25 per person (Einwohneramt BS, checked ). The general steps are in registering at your commune.
Read more How to find an English-speaking tax advisor in Switzerland
Checked by the expat-services.ch editorial team