St. Gallen Income Tax Service

St. Gallen Income Tax Service – Cross-Border & Private Clients

We support clients resident in the canton of St. Gallen with Swiss income and wealth tax filings. Our services cover a broad range of personal tax situations, including domestic and cross-border matters involving Switzerland, the US, or Germany. This page outlines our St. Gallen-specific service scope and fixed-fee packages.

Free 20-min consult View St. Gallen packages

Service scope for St. Gallen income tax

For clients residing in canton St. Gallen, we handle income and wealth tax returns at cantonal and municipal level, with a clear focus on complex and cross-border profiles. Typical elements of a St. Gallen mandate include:

St. Gallen income tax return (canton & municipality)
Annual wealth tax calculation and reporting under St. Gallen rules
Equity compensation (RSUs, stock options, carried interest, bonus shares)
Investment income, structured products, foreign bank and brokerage accounts
Self-employment, partnership interests and holding/management companies
Coordination with US and/or German returns – foreign tax credits, treaty application and timing

For technical background on St. Gallen income tax and cross-border topics, see the St. Gallen section of our Swiss Income Tax Guide . Wealth tax specifics for canton St. Gallen are covered in the St. Gallen Wealth Tax Hub .

St. Gallen income tax packages & pricing

The packages below describe our work for canton St. Gallen via Sesch TaxRep GmbH. Where US or German returns are required, these are prepared and invoiced separately by Sesch USA LLC and/or Sesch Group GmbH WPG. All Swiss-side fees are in CHF and exclude VAT.

Package	Typical profile	Scope	Fee (CHF)
St. Gallen Swiss Only Income & wealth tax (no foreign filings)	Resident in canton St. Gallen Significant salary/bonus and/or investment income Portfolio, real estate and wealth tax exposure No parallel US or German tax return	St. Gallen income tax return (canton & municipality) Wealth tax calculation and annual return Reporting of pensions, deductions, investment and property income Assessment review and response to straightforward tax office queries	From CHF 1’100 to CHF 1’900 Depending on income level, number of accounts and asset complexity.
St. Gallen–US Cross-Border Swiss + US individual returns	St. Gallen resident with US citizenship/green card Salary/bonus, equity compensation, global portfolios Swiss and foreign bank/brokerage accounts; possible PFIC/FBAR/FATCA issues	All items from the St. Gallen Complex Swiss Only package Swiss-side coordination with US returns (foreign tax credits, treaty positions) Income and asset mapping for US reporting in cooperation with Sesch USA LLC	Swiss side: CHF 1’500 – 2’300 US return prepared and invoiced separately by Sesch USA LLC (typically from USD 1’800).
St. Gallen–Germany Cross-Border Swiss + German individual returns	St. Gallen resident with German tax ties (residence history, income or assets) Employment, pension, investment or business income between Switzerland and Germany	All items from the St. Gallen Complex Swiss Only package Application of the Germany–Switzerland tax treaty on the Swiss side Coordination with the German return on sourcing and double tax relief Joint review with Sesch Group GmbH Wirtschaftsprüfungsgesellschaft	Swiss side: CHF 1’500 – 2’300 German return invoiced separately (typically from EUR 1’500).
St. Gallen Private Client Plus Advanced cross-border / entrepreneur	Entrepreneurs, partners or significant shareholders Holding or management companies in St. Gallen and abroad Multi-jurisdiction income (dividends, carry, partnership income, interest)	Tailored St. Gallen income and wealth tax planning and returns Coordination with corporate, holding or partnership structures Integrated cross-border planning with US/German advisors Extended support for tax audits, rulings and complex authority queries	Swiss side: from CHF 2’600 Custom quote depending on structure, entities and jurisdictions involved.

After an initial consultation and review of your situation, we will confirm the most suitable St.Gallen package and provide a written fixed-fee quote before starting any work.

How the St. Gallen income tax process works

1. Discovery call

A 20-minute call to clarify your residence in canton St. Gallen, your income sources, asset structure and any US or German tax connections.

2. Engagement & onboarding

You receive a joint engagement pack clearly separating:

The St. Gallen income and wealth tax mandate with Sesch TaxRep GmbH
Where applicable, the US mandate with Sesch USA LLC and/or the German mandate with Sesch Group GmbH Wirtschaftsprüfungsgesellschaft
Data protection, information sharing and billing principles

3. Unified intake & secure upload

We use a single intake questionnaire and secure document portal for all jurisdictions. Salary statements, bank and portfolio reports, pension documents, equity compensation data and real estate details are collected once and allocated internally to the Swiss, US and German teams, if required.

4. Draft returns & cross-border alignment

The St. Gallen team prepares draft income and wealth tax returns. The US and/or German teams prepare their filings, if required. We coordinate sourcing, foreign tax credits and treaty positions so that all returns are consistent and defensible.

5. Review, sign-off & filing

We provide you with the completed St. Gallen tax return for your review and approval. You can take the time to review the return and are welcome to raise any questions if something is unclear. Once approved, we file the St. Gallen tax return electronically and monitor assessments and deadlines.

6. Invoicing

Before work begins, we issue an advance invoice for 50% of the applicable package fee. The remaining balance is invoiced after you have approved the completed St. Gallen tax return. Where US or German tax returns are prepared, these services are billed separately by the respective legal entities. Separate invoices are issued by each entity (Swiss, US, German). On request, we can align billing in CHF, USD, or EUR and provide an overview of the total engagement cost.

Who we typically work with in St. Gallen

Executives with international roles and equity compensation packages
US citizens/green card holders or German taxpayers living in canton St. Gallen
Entrepreneurs, partners and significant shareholders with cross-border structures
Families with substantial portfolios, holdings or property and wealth tax exposure

Talk to a St. Gallen income tax specialist

We are happy to discuss the appropriate package and next steps in a complimentary 20-minute discovery call.

Book your free consult