Many taxpayers only look at the net cash that arrived in the account. That is where avoidable mistakes start. Swiss tax returns usually require the year-end value of the asset, the gross income it produced during the year and the withholding taxes applied in Switzerland or abroad.
This article covers Swiss and foreign bank accounts, shares, bonds, ETFs, distributing and accumulating funds, foreign withholding tax, DA-1, crypto holdings, staking and the difference between private investing and professional trading. If you first need the broader filing process, our guide on how to file a tax return in Switzerland is the right starting point.
Separate wealth, investment income and capital gains first
Before entering anything into the return, split the position into three categories.
- Wealth: the value of the asset at 31 December or at the end of your Swiss tax liability
- Investment income: interest, dividends, fund distributions, staking rewards or similar yields
- Capital gains: profit or loss on sale, which is often treated differently from recurring income
In Switzerland, cantons and municipalities generally levy wealth tax, while investment income is usually relevant for income tax. Private capital gains on movable private assets are often tax-free, but that does not mean the underlying asset disappears from the wealth tax side.
Bank accounts in Switzerland still need to be declared
Ordinary tax returns generally include current accounts, savings accounts, foreign-currency accounts, deposits and even low-balance accounts. A bank account with no interest can still be taxable wealth if it had a balance at year-end.
In practical terms, you usually need the bank name, account identifier, account holder, balance at 31 December, gross interest and any Swiss withholding tax retained. Do not declare only the net interest that was credited after the deduction.
If you are missing the broader filing sequence behind those figures, Liora Finance explains it step by step in our guide on how to file a tax return in Switzerland and can also review the final numbers through our consultation process.
Foreign bank accounts and brokers are not outside the Swiss return
Swiss tax residency generally means foreign accounts, foreign brokers, digital banks, multi-currency platforms and inactive accounts may still need to be declared. The location of the platform does not remove the Swiss reporting obligation.
Foreign balances and income usually have to be converted into Swiss francs using the relevant official rate. Depending on the item, that may mean year-end rates for wealth and payment-date or officially accepted rates for specific income items.
If your case involves foreign investments, foreign dividends or foreign property as well, our article on double taxation in Switzerland with foreign income or assets helps with the cross-border side.
Shares, bonds, ETFs and funds need correct identification
Securities should usually be entered with the correct asset name, identification number or ISIN, number of units, relevant purchase or sale dates, year-end tax value, gross income and withholding taxes. In many standard cases, ICTax provides recognised tax values and taxable yields for listed products and many investment funds.
For wealth tax, the historical purchase price is often not the relevant figure. The tax value at the end of the year is usually more important. Still, acquisition cost should be kept in your records because it may matter later for complex products, business assets or a review of whether the activity still qualifies as private.
Accumulating funds can still create taxable income
Many investors assume only cash distributions matter. That is too simplistic. An accumulating fund may reinvest internally and still have a recognised taxable yield that needs to be declared even if no cash reached your current account.
That is why relying only on bank movements is risky. The more robust approach is to check the tax statement, ICTax data or other recognised product documentation before filing.
Dividends and interest are usually declared gross, not net
Swiss-source dividends and certain interest payments may be subject to the 35% Swiss withholding tax, the Verrechnungssteuer. That deduction does not replace the ordinary declaration. The normal approach is still to declare the gross income and claim the withholding side separately through the correct tax procedure.
The same logic applies to many foreign dividends and interest payments. If a broker paid you CHF 1,700 after a CHF 300 foreign withholding deduction on a CHF 2,000 gross dividend, the gross CHF 2,000 is usually the starting point for the income side. The withholding element is then reviewed separately.
Swiss withholding tax recovery depends on correct reporting
If the asset or the corresponding income is not properly declared, you may lose the right to recover Swiss withholding tax. That can be expensive because the ordinary income and wealth tax exposure may still remain while the 35% deduction is no longer recoverable.
This is one of the most common avoidable errors Liora Finance sees in investment reporting: taxpayers focus on the tax withheld but forget that full declaration is what preserves the right to reclaim it.
Foreign withholding tax and DA-1 need their own review
Foreign withholding tax is not one single issue. Some of it may need to be reclaimed from the foreign country. Some of it may potentially be creditable in Switzerland under the applicable treaty framework. In many personal tax cases, the Swiss side involves reviewing whether a DA-1 claim is available and supported by the right bank documentation.
The exact result depends on the country, treaty rate, product, evidence and cantonal process. If deadlines are at risk, use our tax deadlines page and our related post on Swiss tax return deadlines by canton to keep the filing and claim timing under control.
Private investor or professional trader is a critical distinction
Private capital gains on movable private assets are generally treated more favourably than professional trading income. But the private label is not automatic just because you invest through an app.
A preliminary review often looks at factors such as holding periods, transaction volume, economic dependence on trading gains, debt financing and derivatives use. Failing one indicator does not automatically make you a professional trader, but it often means the case deserves closer analysis.
This becomes especially relevant when trading activity is systematic, highly leveraged or part of a broader self-employed setup. If that overlap exists in your case, see our guide on starting self-employed in Switzerland and our article on self-employed and freelancer taxes.
Crypto is part of the declaration, not a separate universe
Crypto holdings generally still need to be declared as assets at year-end. That includes exchange balances, self-custody wallets and other digital holdings that belong to you economically.
In many cases you need the name of the token, quantity held, year-end value, exchange or wallet evidence and any related taxable yield. When official tax values are not available, the valuation often needs to rely on a relevant market price or another documented method accepted in practice.
Staking, lending and token rewards may be taxable income
Not every crypto profit is a capital gain. Staking rewards, lending income, yield-farming receipts, airdrops or similar token-based inflows may need to be analysed as taxable income when received or when the enforceable right to receive them arises.
That means the crypto wallet view alone is not enough. You also need a timeline of receipts, a CHF valuation method and supporting records for transfers between your own wallets so ordinary movements are not confused with hidden disposals.
Mining and payments in crypto can create a different tax profile
Mining, business payments in tokens or salary paid in crypto should not be treated as ordinary private capital gains by default. Depending on the facts, they may instead be employment income, self-employed income or business income and therefore fall under a different tax and social-security analysis.
For taxpayers with a B permit or withholding-tax background, investments can also trigger additional filing questions when income or wealth crosses cantonal thresholds. Our guide on taxes for foreigners in Switzerland explains that framework in more detail.
A practical filing checklist
- Collect tax statements, bank certificates, broker reports, crypto exports and foreign withholding documents.
- List every account and asset, including small balances and foreign positions.
- Calculate the year-end wealth value using recognised tax values or documented market values.
- Separate gross income from Swiss withholding, foreign withholding and net cash received.
- Review trades, holding periods, leverage and derivatives use for private versus professional risk.
- Check whether foreign withholding needs a foreign reclaim, a DA-1 claim or both.
- Keep evidence for wallet movements, token receipts and exchange balances.
- File before the deadline and retain the working papers in case the tax office asks for support later.
Common mistakes investors make
- declaring only the net amount received instead of the gross dividend or interest
- forgetting low-balance or inactive bank accounts
- omitting foreign brokers because they are outside Switzerland
- assuming accumulating funds have no taxable income
- treating the 35% Swiss withholding deduction as final tax
- missing the time window to recover withholding tax
- deducting private capital losses as if they were ordinary expenses
- assuming all share or crypto gains are tax-free without reviewing trading behaviour
- reporting only Bitcoin and ignoring altcoins, stablecoins or wallet balances
- failing to document staking, lending or transfers between own wallets
How Liora Finance can help
Liora Finance helps clients organise bank accounts, broker positions, ETF and fund reporting, crypto records, withholding-tax recovery logic, DA-1 preparation and the private-versus-professional review before filing becomes a costly correction exercise.
If you want a practical review of your investment tax reporting, you can explore our services, contact us directly or book a first discussion through our free consultation page. You can also continue with our guides on tax deductions in Switzerland and how to file a tax return in Switzerland.