Professional tax advisory & filing services in Basel for expats
Tax return filing in Basel, made simple.
Want to delegate your Basel tax return to someone you trust — and who speaks your language? With FIN, you get more than just a service: honest support, clear communication, and real value.
Tax advisory in Basel-Stadt — personal, digital, and efficient.
Remember that the deadline for submitting your tax return in the Canton of Basel for individuals is March 31st.
Request deadline extension→Clarity, not complexity.
Our principle is simple: everyone deserves financial clarity and real guidance with their Swiss taxes.
Basel Tax Advisory
Why delegate your Basel tax return?
Thousands in Basel rely on professional support to file their tax return, and for good reason:
- ✓Save time and avoid mistakes with FIN
- ✓Basel tax law changes every year
- ✓We remind you in time for tax-saving opportunities
We handle the process for you — clearly, reliably, and without jargon.
Tax Advisory in Basel – the way it should be.
Thousands in Basel rely on professional support to file their tax return, and for good reason:
We handle the process for you — clearly, reliably, and without jargon.
Basel Tax Return Filing
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For the Canton of Basel. Transparent flat fee and personal support.
From your first contact to secure document upload via Trust FIN Tax Portal — we guide you throughout. We review your final tax assessment and closing invoice. You focus on what matters — we handle the rest.
Individual Tax Planning
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Optimise your situation — whether private or as an expat.
Tax is personal. We know that. That's why we bring deep expertise and clarity to every conversation. With FIN, tax planning becomes an opportunity — not a burden. Start early, stay ahead.
Expat Tax Advisory in Basel
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Clarity around double taxation, withholding tax & reporting obligations.
We know the international context. Whether ESOPs, real estate abroad, or foreign income — FIN is the right partner for your Basel tax return.
Strategic Financial Planning
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Covering retirement, inheritance, investments, and real estate.
By combining tax expertise with financial planning, we help you build long-term strategies aligned with Swiss regulations and your personal goals.
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Delegate your Basel Tax Return, just three steps away
Initial Consultation & Assessment
Step one
Tell us about your situation. In our initial, no-obligation consultation, we take the time to understand your unique needs, completely free of charge. From the very beginning, you'll benefit from full transparency with our clear, fixed rates.
How it works →Document Submission
Step two
Your personalized checklist is automatically created by Trust FIN Tax Portal based on your information. Access and manage your documents securely in the Swiss cloud using our client portal with two-factor authentication.
How it works →Full Review & Optimization
Step three
We don't just fill out the form. We look for ways to optimize – for this year and the next. Because good tax advisory goes beyond paperwork.
How it works →You always know what to expect
Our flat-rate model adjusts to your situation and is made up of transparent components.
Basic Package
Make the most of all available tax deductions.
- Tax return filing
- Deadline extension
- Add-ons based on complexity
Basic Package
- Tax return filing We prepare and file your complete Swiss tax return, optimizing every deduction.
- Deadline extension We handle the formal deadline extension request with your canton.
- Add-ons based on complexity Additional services only when your situation requires them — no hidden costs.
Most appreciated
Premium Package
We fully represent you with the tax authorities & take care of all the tax hassle for you.
- Everything from Basic
- Personal consultation
- Full representation
- Document requests from tax authorities
- Tax objection
Premium Package
- Everything from Basic All Basic services included as your solid foundation.
- Personal consultation One-on-one session to review your financial situation and tax strategy.
- Full representation We communicate directly with tax authorities on your behalf.
- Document requests from tax authorities We handle all information requests and correspondence.
- Tax objection We file formal objections if your tax assessment needs correction.
All Inclusive
Sit back and relax. Your ultimate peace-of-mind package.
- Everything from Premium
- Priority processing
- Ongoing optimizations
- No extra charges
All Inclusive
- Everything from Premium Complete Premium coverage with additional exclusive benefits.
- Priority processing Your case gets fast-tracked through our workflow.
- Ongoing optimizations Proactive multi-year tax planning tailored to your goals.
- No extra charges Flat rate covers everything — no surprises, no add-ons needed.
Additional Services
(e.g. bank accounts; debts) CHF 10 per item
(foreign withholding tax) CHF 200
(within 5 days) CHF 200
Questions about taxes in Basel?
We're here with the answers you need.
Here's what people often want to know before getting started with FIN in Basel.
Do I have to declare foreign income/assets in my Basel tax return?
Yes. If you are domiciled in Switzerland, you must declare global income and assets — including foreign accounts, property and dividends.
When is the tax return deadline in Basel?
Your Basel tax return must be submitted by March 31st following the tax year. You can request an extension online via the Basel-Stadt Tax Administration.
When is filing required in Basel?
Earning more than CHF 120,000/year always requires filing. Lower income may still require or benefit from filing due to assets, securities or properties.
What if I pay withholding tax in Basel?
If you earn more than CHF 120,000/year, you must file a tax return. Below that, you may still benefit from a refund via the subsequent ordinary assessment (NOV) process to claim deductions such as pillar 3a.
I work across the border — do I need special advice?
Yes, cross-border commuters (Grenzgänger) between Basel, Germany and France face specific tax rules. FIN specialises in these cases and ensures correct handling.
Can I file the Basel tax return online?
Yes. You can use BalTax Online (Basel-Stadt) or e-Tax BL (Baselland) — or upload everything securely via Trust FIN Tax Portal.
Missed your tax return deadline in Basel?
We help with extensions — book our express service if needed. Without an extension, you may face fines or estimated assessments.
Do you support expats, self-employed individuals or students filing in Basel?
Yes — especially in complex cases, professional support pays off. We guide expats, cross-border workers, freelancers and students.
Joint account, unmarried — how to declare?
Each holder must declare their share (typically 50/50) correctly in their own return — both for capital balances and for income earned.
Are gifts and inheritance taxable in Basel?
Gifts must be declared with full details on giver, amount and date.
How much does a Basel tax return cost?
We offer fair flat rates, customised for your needs: starting at CHF 280; fixed package personalised by complexity.
Can I submit my Basel tax information online?
Yes. We support you digitally — all digital uploads, communication and advice are secure via Trust FIN Tax Portal with 2FA.
What happens with my tax return if I move to a different canton during the year?
Your tax return is filed in the canton where you are officially registered on December 31st of the tax year.
Is the initial consultation free of charge?
Yes, your first consultation with us is completely free and without obligation. This allows you to get to know us and discuss your needs before making any commitments.
Why should I choose independent financial advice?
Independent financial advice ensures that recommendations are made in your best interest, free from conflicts of interest or product sales pressure. Our only goal is to help you achieve your financial objectives.
How is an independent advisor different from a bank consultant?
Unlike bank consultants, who may be tied to specific products or services, independent advisors offer unbiased guidance and access to a wider range of solutions tailored to your individual situation.
How do you get compensated for your services?
Our compensation is transparent. We typically work on a fee basis, which we discuss and agree upon with you in advance. This ensures our advice remains objective and in your best interest.
Am I entering into a long-term commitment?
No, you are not required to enter into a long-term contract. Our services are flexible, and you decide how long you wish to work with us.
How often do we review my financial situation?
We recommend reviewing your financial situation at least once a year or whenever there are significant changes in your life. We tailor the frequency to your preferences.
Do you also help with budgeting and financial organisation?
Yes, we assist you with budgeting, financial organisation and developing strategies to manage your finances more effectively.
Is online submission possible?
Yes. You can file digitally via BalTax Online (Basel-Stadt) or e-Tax BL (Baselland), or upload everything securely via Trust FIN Tax Portal with two-factor authentication.
What happens if I miss the deadline?
Without an extension, you may face fines or estimated assessments — usually to your disadvantage. Act early.
Can FIN help if I'm late with my Basel tax return?
Absolutely. We can file for an extension or offer express service.
Can I handle everything online with FIN?
Yes. From checklists to final submission — digital and personal.
What about joint accounts if we're not married?
Typically split 50/50. Each holder must declare their share of capital and returns.
Are gifts and inheritance taxable in Basel?
They must be declared — with full details of giver, amount and date.
How much does it cost?
We offer flat rates tailored to your needs — with full transparency, starting at CHF 280.
Do you offer independent investment advice?
Yes, we provide independent investment advice based on your goals, risk tolerance and financial situation, without promoting specific products.
What types of investments do you recommend?
We recommend a broad range of investment options, including funds, ETFs and other diversified instruments, always tailored to your individual needs and preferences.
Do you manage investments or only advise?
We do not manage assets or engage in daily trading. Instead, we help you decide whether to delegate asset management or manage your investments yourself. We act as your sparring partner, supporting you with strategy and decision-making.
Can you review my existing investment portfolio?
Yes, we can review your current investment portfolio, assess its suitability and suggest improvements to better align with your goals.