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+41 (0) 44 533 34 25

welcome@onetreuhand.ch

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Zwei Fachleute beraten sich in einem modernen Büro der Treuhand über Steuerberatung mit Blick auf eine Stadtansicht.
Zwei Fachleute besprechen Finanzdokumente im Treuhandbüro, was präzise Steuerberatung gewährleistet.

Personal, accurate and stress-free

Tax Return Services in Zurich

  • Save time: No paperwork, no deadline pressure
  • Optimised deductions: More than just standard filing
  • Confidence: Handled by certified tax experts
  • Personal support: One dedicated contact person

We take care of your personal tax return – professionally prepared, carefully reviewed and tailored to your individual situation. So you save time, avoid mistakes and gain peace of mind.

Specialized tax consulting for private individuals

Preparing a personal tax return takes time, attention and can easily lead to costly mistakes if deductions are overlooked or information is declared incorrectly. This is exactly where we support you:
We handle the complete preparation of your tax return – structured, precise and tailored to your individual situation.

Our expertise in personal tax consulting ensures that your tax return is not only correct, but also optimised within the legal framework. We always consider the full picture – from income and assets to pension planning, property ownership or international tax matters.

You have income from cryptocurrencies? No problem – we specialize in the correct tax treatment of crypto assets, trading gains and staking income.

 

Rodolfo Intaglietta – eidg. diplomierter Treuhandexperte

Get to know us

You benefit from clear processes, professional accuracy and personal support you can rely on.

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You deserve this!

Private tax consulting at a glance

We support you with all tax-related questions, plan your personal tax strategy, and assist you with objections, negotiations, and special taxes.
This gives you clarity, saves time, and sustainably reduces your tax burden.

  • Individual tax consulting: Personal consulting on all private tax matters
  • Tax return: Preparation, review, and analysis of tax returns for private individuals
  • Tax planning: Development and planning of individual tax strategies
  • Tax optimization: Optimization and reduction of the tax burden within the legal framework
  • National & international tax law: Consulting on Swiss and cross-border tax law
  • Withholding tax: Consulting, calculation, and correct setup of withholding tax
  • Objections: Consulting and preparation of objections against tax assessments
  • Negotiations: Preparation and conduct of negotiations with tax authorities
  • Tax assessment: Analysis and assessment of personal tax burden
  • Inheritance, gift & real estate capital gains tax: Consulting and support with special taxes
  • Tax invoice: Review, explanation, and processing of tax invoices
  • Pension provision & taxes: Consulting on pillar 3a, pension funds, and tax‑optimized pension strategies
  • Life events & taxes: Tax consulting for marriage, divorce, property purchases, retirement, or inheritances
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Save time

Significant time savings
No complicated software, no collecting receipts, no losing nerves.

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Leave nothing behind

Clear structure, better refunds.
Targeted optimization instead of leaving money unused.

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Secure implementation

Correct implementation without errors.
Federally certified and personally responsible tax advisors.

Digital, simple, effective – this is how our trust app works

With our trust app, private individuals can upload all tax-relevant documents digitally – anytime and without paperwork.

Whether salary statements, capital gains from trading or cryptocurrencies, rental income, pension documents or any other relevant records: everything can be submitted easily via app or upload.

We professionally process and structure your data, ensure correct tax allocation and take care of the complete preparation of your tax return.

  • Upload tax documents digitally – no paper, no administration
  • Salary, investments, property & crypto clearly structured
  • Real-time access to all relevant data and documents
  • No tax knowledge required – we take care of everything
  • Secure data transmission according to Swiss standards

I want this

No commitment, no risk – see for yourself how much time you save!

 

 

Customer feedback

Our digital fiduciary services are used by more than 300 clients in Zurich, across Switzerland and internationally – reliably managed, clearly structured, and personally supported.

Portrait von Loreen, einer privaten Treuhand-Kundin

„ONE! Treuhand reviewed my personal tax situation thoroughly and explained everything clearly. I finally have clarity and make financial decisions with confidence.“

Loreen

Portrait von Urs, einem Kunden der seine Steuerklärung hat ausfüllen lassen

„I simply upload my documents and everything is taken care of. My tax return is accurate, on time, and saves me a lot of effort every year.“

Urs

Portrait von Tim, einem Kunden mit dem Fokus auf Krypto-Trading

„My crypto transactions were prepared correctly and declared properly. What I appreciated most was the clear explanation of what is tax-relevant and what is not.“

Tim

4 SIMPLE STEPS

How to get started with your private tax consulting

Many people want less effort, more clarity, and noticeable relief when it comes to their taxes. Our structured process ensures that you always know what is happening.

1

Initial consultation & tax analysis

We review your current tax situation: income, deductions, pension provision, assets, real estate, life events, and possible optimization potential. You receive a clear assessment of where you can save money and avoid risks.

2

Individual tax strategy & document collection

Together, we define your personal tax strategy. We show which documents are required, which deductions are relevant, and how you can optimize your tax burden in the long term.

3

Preparation & optimization of the tax return

We take over the complete preparation, review, and optimization of your tax return. Deductions, pension provision, special cases, and tax opportunities are correctly taken into account – for the best possible result.

4

Submission, review & ongoing support

We submit your tax return, review the assessment, support you with inquiries from the tax authorities, and assist you with objections or negotiations. This ensures that you remain on the safe side at all times from a tax perspective.

Private tax consulting from Zurich for everyone who doesn’t want to leave anything behind

Schedule a free initial consultation

Guarantee & freedom from risk

You remain flexible: There is no minimum term and no notice period. If you ever find that we are not the right fit for you, simply end the collaboration – uncomplicated and at any time.

With us, there is no long back and forth, but fair, clear conditions. It is important to us that you are truly convinced. We want to give you security so that you can fully focus on what matters most: your business.

Our quality promise

We are a member of TreuhandSuisse – the leading professional association for trustees in Switzerland. Membership is only possible with sound professional training and guarantees that you will always work with professionals.

We consistently invest in further training

Every year we complete mandatory training courses and workshops – this is strictly monitored by TreuhandSuisse. This ensures we are always up-to-date in taxation, accounting, business consulting, and much more.

Real security through professional liability insurance

We have comprehensive professional liability insurance (mandatory for members of TreuhandSuisse). Should an error occur that causes damage, you, as our client, are protected without financial disadvantage.

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Tax knowledge in our Knowledge Base

We have summarized the most important knowledge about Swiss tax law for you in valuable articles. Clearly and understandably prepared, so you know what you want to know.

 

FAQs about private tax consulting

Social insurance, special levies, or procedures. Here you will find explanations of what clients want to know — based on the concerns we hear daily from Clients in Zurich and throughout Switzerland.

 

When is a natural person subject to tax in Switzerland?

In Switzerland, natural persons are subject to tax as soon as they have their tax domicile or residence in Switzerland.
A natural person is a human being, regardless of age, gender, etc., in their role as a legal subject, i.e. as a bearer of rights and obligations.
With regard to the tax liability of natural persons, further aspects must be considered, such as the scope of tax liability (unlimited or limited), the duration of tax liability (beginning and end), the consequences of a change of residence from one canton to another, tax succession, and the taxation of families.

Which taxes apply to natural persons in Switzerland?

The most important direct taxes for natural persons in Switzerland are income tax and wealth tax.

Income consists of income from self-employed or employed activity, secondary income, insurance daily allowances, as well as returns on movable and immovable assets.

Wealth tax is a supplementary tax to income tax and is levied regardless of the level of income. It covers total net assets, i.e. all assets minus liabilities and debts, as of December 31. Assets include movable assets (securities, cryptocurrencies, jewelry, gold, cash, …) and immovable assets (real estate in Switzerland and abroad).

In addition, there are other taxes such as poll tax, real estate capital gains tax, property tax, real estate transfer tax, inheritance tax, gift tax, and church tax.

What happens if the Swiss tax return is submitted late or not at all?

If the tax return is not submitted on time, the tax office will issue a reminder. If the obligation is still not fulfilled, the tax office will assess the tax at its own discretion. In addition, a fine will be imposed.

If a taxpayer is assessed too low, a subsequent tax and penalty procedure due to tax evasion may even be initiated. Our experience shows that no one escapes the tax authorities. Save yourself the trouble and entrust us with your tax return.

Can I apply for a deadline extension as a natural person?

In Switzerland, a natural person must apply for a deadline extension before the submission deadline for the tax return expires. The extension can be requested online or in writing.

What happens if incorrect information is provided in my personal tax return?

The principle applies that the tax return must be completed fully and truthfully.
The tax authority expects the taxpayer to complete the tax return correctly.

The taxpayer must make all necessary clarifications. If questions remain despite guidelines and information from the tax authority, a specialist such as ONE! Treuhand GmbH can be consulted.

Anyone who avoids this effort takes a risk: if incorrect information is discovered, the tax authority may accuse the taxpayer of intentional or at least conditional intent.

If incorrect information is not discovered, underpaid taxes may later be reclaimed with interest, possibly with a fine for tax evasion.

If discovered during assessment, the tax return will be adjusted ex officio. Fines may also apply, especially in cases of intent. Avoid penalty proceedings and engage us – we know exactly what we are doing.

Can I still submit the tax return in paper form?

The tax return can be completed and submitted either online or in paper form. Some cantons, such as Zurich, currently require the digital version to be printed and signed. Always check the specific canton to see how the tax return should ideally be submitted.

What is a tax advisor and which tax services do they provide?

A tax advisor is a qualified expert who advises and supports private individuals and companies on tax matters. They help maximize tax benefits and ensure the correct fulfillment of tax obligations – often with services specifically tailored to natural persons.

Services include financial consulting, preparation of tax returns, development of tax concepts, and support during tax filings.

Are there additional ways to manage income and assets in a tax-efficient manner?

Yes, there are various ways to manage income and assets tax-efficiently. For example, you can invest in financial products, set up savings plans, open private bank accounts, or invest in real estate. Tax-advantaged investment products such as funds, investment accounts, or insurance solutions can also be helpful.

Who can help me with submitting the tax return or obtaining tax refunds?

For questions regarding tax returns or refunds, you can contact the cantonal tax administration or the relevant municipal tax office. Alternatively, you can contact a qualified tax advisor who can assist you with completing and submitting the tax return and obtaining refunds.

How does the tax return process work?

A tax period usually runs from January through December of a calendar year. Tax returns are sent out annually at the beginning of the year by the Swiss tax authorities. You must report your income and assets using a special form provided free of charge by the canton or municipal tax office.

After the deadline in March of the same year, the tax return must be signed and submitted so that taxes for the previous year can be calculated. If a taxpayer fails to submit the tax return on time, a penalty fee may apply. With a deadline extension, however, it is possible to extend the deadline until September of the same year.

Get your tax return done – without stress

Personal, digital and reliable. We take care of your taxes so you can focus on what matters.

  • Professional tax return preparation – accurate and on time
  • Clear guidance instead of uncertainty around deductions and income
  • Expertise in crypto, investments and property income
  • One dedicated advisor – no hotlines, no back-and-forth

 

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Rodolfo Intaglietta | CEO

Eidg. diplomierter Treuhandexperte &

Diplomierter Experte in Rechnungslegung und Controlling

Standort: Zürich-Glattbrugg

Mail: welcome@onetreuhand.ch

Phone: +41 (0) 44 533 34 25

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