Effective method or flat tax rate? Which VAT method fits your company

The basic difference: not just workload, but system logic

In Switzerland, businesses are generally subject to VAT from revenue from taxable supplies of at least CHF 100,000 per year. Anyone subject to VAT must not only register, but also decide which VAT method should be used for reporting.^1,3

For most SMEs, two models come into consideration: the effective method and the flat tax rate method.

• The effective method is the ordinary VAT logic: you declare the tax due on revenue and deduct the input tax actually incurred separately.
• The flat tax rate method simplifies reporting by multiplying taxable gross revenue by a sector-specific rate approved by the FTA; separate determination of input tax is not required.^3,4

This is exactly where the real decision lies: do you want to claim input tax precisely and in full on the basis of your actual expenses and investments, or is the flat simplification economically and administratively more appropriate for your company?^3,4

When the effective method is stronger

The effective method is particularly suitable if your company regularly incurs significant input taxes. This includes, for example, trading companies with high goods purchases, businesses with larger investments, companies with many third-party services, IT or consulting firms with high external project costs or SMEs with ongoing infrastructure expenses.^3,4

The advantage is clear: input tax is not settled on a flat basis, but deducted effectively. This can be economically significant if your company bears above-average costs subject to input tax. The downside is the greater bookkeeping and control effort, because output tax, input tax, corrections and allocations must be kept accurately.^3,4

The effective method also often fits a bookkeeping setup with clean receivables and payables logic. The SME Portal states that most taxable businesses report quarterly on the basis of agreed consideration because this system is based on their receivables and payables bookkeeping.³

The effective method is therefore usually the more robust choice if your company provides differentiated services, invests regularly or already has well-kept financial bookkeeping. In that case, the greater precision is often more important than simplification.^3,4

When the flat tax rate can make sense

The flat tax rate method is intended for small and medium-sized businesses that want to simplify their VAT reporting. Currently, taxable annual revenue including tax must not exceed CHF 5.024 million; in addition, the tax due per year must not exceed CHF 108,000.⁴

The practical advantage lies in the lower administrative workload: instead of recording and deducting input taxes individually, you account for total taxable revenue using the approved flat tax rate. The FTA expressly states that input taxes do not have to be determined, which makes reporting significantly easier.^3,4

This can be useful, especially for SMEs with a simple cost structure, few investments and manageable input taxes. Economically, the method is often a better fit where the simplified mechanism is closer to the actual input tax burden and bookkeeping should not become unnecessarily complex.^3,4

It is important, however, not to confuse the simplification with a blanket saving. The flat tax rate is not a discount on VAT, but a simplified reporting technique. Whether it is cheaper or more expensive than the effective method depends on the specific relationship between revenue, cost structure, investments and input tax.^3,4

Since 1 January 2025, the following stricter rule applies to multiple activities: for each activity whose share of total taxable revenue exceeds 10%, the respective applicable flat tax rate must be used. This means that more than two flat tax rates are now possible. For mixed business models, this partly makes the method less simple than before.⁵

The flat tax rate method must not be confused with the lump-sum tax rate method. The latter is intended for public bodies and certain related areas and is generally not the relevant model for typical private SMEs.⁴

Clearly separate reporting basis and reporting frequency

A typical practical misunderstanding is to mix up the method, the reporting basis and the reporting period. These are three different levels of VAT logic.^3,6

First, the method: effective or flat tax rate.^3,4

Second, the reporting basis: on agreed consideration or on received consideration. Under agreed consideration, you report based on issued invoices. Under received consideration, you report based on payments received. According to the SME Portal, reporting on received consideration is mainly suitable for very small businesses without proper receivables bookkeeping; it requires approval by the FTA.^3,7

Third, the reporting period: as a standard, the effective method is reported quarterly and the flat tax rate method generally half-yearly. Since 1 January 2025, companies with annual revenue of up to CHF 5,005,000 may, upon request, also report annually. This is a separate simplification and is not automatically an argument for or against a particular method.^4,6

Anyone choosing annual reporting must also observe the rules on instalment payments: under the effective method, three instalments are due, and under the flat tax rate method one instalment is due.

Annual reporting therefore reduces the number of returns, but does not change the fact that the choice of method must be assessed separately from an economic perspective.⁶

Since 1 January 2025, VAT-registered businesses must submit their returns in the FTA portal. Applications for reporting on received consideration or adjustments to the reporting setup also run via the official FTA channels.⁷