Eight common Swiss VAT mistakes and how to fix them

At a glance

• The ordinary CHF 100,000 threshold is based on relevant turnover, not profit.
• At 8.1%, a CHF 1,000 VAT-inclusive price contains CHF 74.93 of VAT, not CHF 81.
• VAT on purchases is treated differently under the effective method and the net tax rate method.
• A foreign invoice without VAT can create a Swiss reporting obligation, even for a business that is not VAT-registered.
• Correcting your bookkeeping does not automatically correct a return already submitted to the Federal Tax Administration (FTA).

1. Waiting too long to register for Swiss VAT

VAT liability means being subject to VAT. For most businesses, registration becomes compulsory when relevant annual turnover reaches CHF 100,000. The calculation includes qualifying supplies made in Switzerland and abroad; supplies exempt from tax without credit, such as certain medical services, are excluded.

Profit does not determine this threshold. A business invoicing CHF 120,000 in relevant supplies with CHF 130,000 of expenses may therefore need to register despite making a loss. The special CHF 250,000 threshold applies to certain voluntarily managed, non-profit sporting or cultural associations and charitable institutions. It does not apply to every non-profit organisation.

Another trap is waiting for the invoice that takes turnover over CHF 100,000. When starting or expanding an activity, assess whether the threshold will be exceeded over the following twelve months. Signed contracts can help establish this. Articles 10 and 14 of the Swiss VAT Act set out these rules; Article 66 requires notification to the FTA within 30 days of VAT liability beginning.

If you discover late registration, first establish the date liability began. Review sales, purchases and invoices since that date. Whether you can charge customers additional VAT depends in particular on the agreed price: where a VAT-inclusive price was accepted, the business may have to bear the cost.

Our guide to Swiss VAT registration explains the process and when voluntary registration may be useful.

2. Applying the wrong VAT rate

The rate depends on what you sell. It does not change simply because your customer is an individual, small business or association. The current Swiss VAT rates are:

If you provide several types of supplies, check each category in your software. When statutory rates change, the date or period when the supply was made also matters; the invoice printing date alone is not enough.

To correct an error, update the settings and identify invoices already issued at the wrong rate. VAT shown incorrectly or at too high a rate can remain payable until the conditions for correction are met. Article 27 of the VAT Act governs this situation. Changing a number in the software without addressing the invoice sent to the customer may be insufficient.

3. Confusing VAT-exclusive and VAT-inclusive prices

A VAT-exclusive amount is the price before VAT is added. A VAT-inclusive amount already contains the tax. The distinction sounds simple, but it changes both the calculation and the margin you retain.

To extract VAT from a VAT-inclusive price at the standard rate, use VAT-inclusive amount × 8.1 ÷ 108.1. Multiplying the total directly by 8.1% calculates tax on an amount that already includes tax.

Before correcting an invoice, reread the quotation and contract. “Net price” sometimes means the price after a discount, without specifying whether VAT is included. State “excluding VAT” or “including VAT” clearly and make sure your software follows the same convention. Our guide to VAT in Switzerland explains the fundamentals.

4. Claiming input tax you are not entitled to deduct

Input tax is VAT on purchases that a business can deduct when the conditions are met. Under the effective method, it reduces the VAT payable to the FTA. For example, CHF 810 of VAT on sales less CHF 243 of deductible input tax leaves CHF 567 payable, assuming no other transactions or adjustments.

A purchase paid for with a company card is not necessarily a business expense. Consider how it is used. Private expenses do not qualify; purchases used for both business and private purposes require an appropriate adjustment. Deduction is also restricted for purchases used to make supplies exempt without credit where no option to tax has been exercised. These distinctions appear in Articles 28–30 of the VAT Act.

Next, check the evidence: you must be able to establish the supplier, nature of the supply, amount and VAT charged. A formal defect does not necessarily mean the deduction is permanently lost, but you need to prove the transaction. Request a completed invoice when necessary.

Finally, French or German VAT on a foreign invoice cannot be deducted as Swiss VAT. Any refund follows a separate procedure. For a common example of mixed use, see our explanation of private use of a company vehicle and its VAT treatment.

5. Mixing up the effective and net tax rate methods

The two methods calculate the amount payable differently. Under the effective method, you report VAT on sales and deduct eligible input tax on purchases. Under the net tax rate method, you apply the rate authorised by the FTA to taxable turnover including VAT. This rate already allows, on a standardised basis, for the VAT typically incurred on purchases in your industry.

Two mistakes follow from this: applying the net tax rate to turnover excluding VAT, or deducting supplier-invoice VAT a second time. The net tax rate is used to calculate the return. Customer invoices show the statutory rate applicable to the supply, such as 8.1%, rather than your net tax rate.

Before making corrections, identify the method and rates actually authorised for the relevant period. You cannot retrospectively choose whichever method produces the lowest bill. Changes are governed by Article 37 of the VAT Act and can affect input tax on stocks and investments. The FTA explains the rules on changing methods that apply from 2025 (in French).

6. Assuming a foreign invoice without VAT needs no action

Your business buys consultancy or an advertising campaign from a foreign supplier. The invoice contains no Swiss VAT. That does not always mean there is nothing to report: for certain services, the Swiss recipient must calculate and report acquisition tax, often described as reverse-charge VAT.

Distinguish two situations. A business already subject to Swiss VAT reports qualifying acquisitions without a CHF 10,000 exemption threshold. Under the effective method, an input tax deduction may be available if the conditions are met. A business that is not VAT-registered becomes liable for acquisition tax when it purchases more than CHF 10,000 of qualifying supplies in a calendar year.

Test the threshold across all qualifying supplies, not separately for each supplier. A person liable only for acquisition tax must notify the FTA and report the acquisitions within 60 days after the calendar year ends, under Article 66(3) of the VAT Act.

Do not apply this rule indiscriminately to all foreign invoices. Imported goods fall under import VAT rules, while certain IT and telecommunications services supplied to recipients not subject to VAT have special rules. Check the type of supply, place of taxation and supplier status using the FTA’s acquisition tax guidance. Conversely, a foreign customer address alone does not justify omitting Swiss VAT from a sales invoice.

7. Reporting in the wrong period or using the wrong correction

An invoice issued in December and paid in January is not necessarily reported in January. It depends on the accounting basis. Under the agreed consideration basis, VAT on sales is generally reported when invoiced. Under the received consideration basis, it is reported on payment. The latter requires FTA authorisation; it is not a choice made invoice by invoice.

Deposits and advance payments also deserve special attention. Before moving an amount between periods, check the applicable rule in Articles 39 and 40 of the VAT Act, rather than relying solely on the bank statement.

If an error affects a return already submitted, the correction procedure depends on the circumstances:

Annual reconciliation checks consistency with the accounts; annual reporting is a filing frequency. They are different things. A business filing annually may still need a correction return or annual reconciliation.

Do not simply include an old error in the current return. Use the VAT return correction or annual reconciliation procedure as appropriate. Keep track of adjustments already submitted to avoid reporting them twice.

8. Overlooking deadlines and supporting records

The return and payment are generally due within 60 days after the reporting period ends. Businesses must act without being prompted: waiting for an invoice or reminder from the FTA can cause a missed deadline. Annual reporting also involves instalment deadlines during the year.

Check filing and payment deadlines separately. If cash flow is tight, the FTA offers extensions or payment arrangements in certain circumstances. An extension does not necessarily eliminate interest. The late-payment interest rate is 4% in 2026 (in French); it can change from year to year.

At year-end, compare the accounts with the returns submitted. Article 72 of the VAT Act requires identified errors to be corrected. Under FTA instructions, without a correction within 240 days after the financial year ends, the tax period is considered finalised. That does not make an error immune from correction or prevent a subsequent audit. If reconciliation reveals no differences, no corrective annual reconciliation form is required. Review other accounting mistakes too: a VAT reconciliation may reveal duplicate expenses, missing documents or incorrectly recorded private purchases.

Keep invoices, returns, submission confirmations and adjustment calculations so that each figure can be traced from its supporting document to the return. Accounting records are normally retained for ten years; certain property-related documents must be retained for twenty years under Article 70 of the VAT Act.

How do you correct VAT mistakes without creating new ones?

Start by establishing the scope of the error. A single invoice and an incorrect rate used for six months require different corrections. Export the relevant entries and gather supporting documents before changing figures.

1. Identify the periods and invoices. For each one, record the amount reported, the correct amount and the difference, with supporting evidence.
2. Fix the cause. Adjust the VAT code or settings responsible, then review invoices that need correcting with customers or suppliers.
3. Submit the appropriate correction to the FTA. An internal accounting entry does not amend a return already filed. Choose a period correction or annual reconciliation according to the circumstances.
4. Reconcile the outcome and payment. Check any additional amount payable or credit expected, then archive the submission confirmation and calculation.

If the problem recurs, review responsibilities too: who checks new expense categories, foreign suppliers and changes in business activity? A few targeted checks before each submission can prevent the same discrepancy reappearing at year-end.

To understand the principles before your next return, explore the lessons in our free Swiss VAT course (in French).

Sources and last review

References checked on 2 November 2026. English versions are linked where available; French-language sources are marked.

• Federal Value Added Tax Act: in particular Articles 10 and 14 (liability), 26–30 (invoices and input tax), 37, 39 and 40 (returns), 45 and 66 (acquisitions), 70–72 (records and corrections) and 86–90 (payment).
• FTA: VAT rates in Switzerland.
• FTA: net tax rate method from 2025 (in French).
• FTA: acquisition tax.
• FTA: correction returns and annual reconciliation.
• FTA: annual reporting conditions and instalments.
• FTA: VAT payments and payment arrangements.
• FTA: interest rates for 2026 (in French).