Why stamp duty matters for every SME
In Switzerland, stamp duties operate at two distinct levels. At the federal level, the Federal Act of 27 June 1973 on Stamp Duties (LTB, RS 641.10) provides for three taxes on financial transactions: issuance of equity securities, trading in securities, and insurance premiums. There is no federal tax on security deposits for mortgages, guarantees, or ordinary operating contracts. In some cantons — in particular Ticino, Vaud, Valais, and Geneva — a cantonal stamp duty instead applies to certain contracts executed as private deeds, including loans and sales of movable property.
Confusing the two levels can lead to omissions (where cantonal tax is due) or improper payments (where no obligation exists). Penalties vary: at the federal level, the statute of limitations for the tax claim is five years; in cantons that levy contract stamp duty, fines of up to ten times the tax evaded may apply. For business owners, administrative managers, and fiduciary professionals, knowing the competent authority, calculating the tax correctly, and recording it in accounting remains a matter of tax compliance.
This guide focuses on documents and contracts typical of SMEs — excluding employment and remuneration topics — and explains federal and cantonal rates, payment responsibility, deadlines, and correct accounting in Accountex.
Federal stamp duties: overview
The LTB provides for three distinct taxes, collected by the FTA. For document management in an SME, it is essential to distinguish them from cantonal contract stamp duty:
| Type of tax | Subject matter | Indicative rate | SME relevance |
|---|---|---|---|
| Issuance tax | Capital contributions, issuance of equity securities | 1% on the value exceeding CHF 1'000'000 | Low — significant capital increases |
| Securities transfer tax | Transfer of equity securities and similar proprietary rights | 0.15% (CH) / 0.30% (foreign) | Medium — transfer of GmbH shares or AG shares |
| Insurance premium tax | Insurance premiums (unless exempt) | 5% (non-life) / 2.5% (life, if taxable) | Medium — non-exempt policies |
The remainder of this article examines cantonal contract stamp duty on private deeds — the most common in SME operational relationships in cantons that provide for it — and relevant federal taxes in the case of corporate or insurance transactions.
Which documents and contracts are subject to stamp duty?
The scope of application depends on the regulatory level. At the federal level, the LTB does not subject mortgages, guarantees, invoices, service contracts, or employment contracts to stamp duty. In cantons with cantonal stamp duty (e.g. Ticino, LBol), the list of taxable private-deed contracts is exhaustive: loans, transfer of movable property, construction contracts and real estate brokerage, among others. Here are the most frequent cases in an SME context:
Contracts potentially subject to cantonal stamp duty
- Private-deed loan contracts (shareholder loans, intercompany loans)
- Sale and transfer of movable property
- Construction contracts (subject to exceptions for liberal professions)
- Notarial acts (sureties, mortgage establishment)
- Banking documents listed by cantonal law (fixed amount)
- Non-exempt insurance premiums (federal tax)
Generally exempt documents
- Service supply contracts and professional mandates
- Invoices, purchase orders, and order confirmations
- Real estate lease contracts
- Employment contracts and remuneration agreements
- Transfer of company shares or stock (federal securities transfer tax, if applicable)
- Independent guarantees and letters of patronage (unless in notarial form)
Watch out for mixed transactions: a single contract covering both service provision and a loan must be analysed by component. The portion corresponding to financing remains subject to cantonal stamp duty where provided for. Always verify the applicable cantonal law: rates, deadlines, and procedure vary considerably.
Rates and tax calculation
Rates differ between the federal and cantonal levels. In cantons with contract stamp duty, the standard rate on private-deed contracts is CHF 1 per CHF 1'000 of taxable value (1‰), with cantonal minimum and maximum amounts. Certain categories have specific rates:
| Contract type | Taxable base | Rate / amount |
|---|---|---|
| Private-deed loan (cant.) | Loan amount (principal) | CHF 1 / CHF 1'000 (1‰) |
| Sale of movable property (cant.) | Agreed price | CHF 1 / CHF 1'000 (1‰) |
| Banking document (e.g. Ticino) | Per document | CHF 10 (fixed amount) |
| Notarial surety (cant.) | Guaranteed amount | CHF 1 / CHF 1'000 (1‰) |
| Annual substitute tax (cant.) | Assessed global taxable amount | CHF 0.75 / CHF 1'000 (0.75‰) |
Calculation example
A GmbH in Ticino enters into a private-deed shareholder loan of CHF 150'000. Cantonal stamp duty amounts to CHF 150'000 ÷ 1'000 = CHF 150. If the same amount were disbursed via a standard banking document, the fixed tax of CHF 10 on the banking document would apply. In cantons without cantonal contract stamp duty, no contract stamp duty is due.
Who is liable for payment?
Payment responsibility depends on the type of tax and the canton. For cantonal stamp duty on private-deed contracts, the contracting parties are jointly and severally liable, unless otherwise agreed. For federal issuance tax, the obligor is the issuing company; for securities transfer tax, the securities dealer (as a rule the bank); for insurance premium tax, the insurer or, if foreign, the Swiss policyholder.
For bank loans, the bank often charges the client cantonal stamp duty on the banking document. For private-deed shareholder loans, the parties must arrange stamping at the competent cantonal office, unless the company benefits from the annual substitute tax (global stamp duty assessment).
For contracts concluded abroad but perfected in a canton with cantonal stamp duty, the obligation arises if the last signature that perfects the contract is affixed in the canton — for example, a loan signed in Ticino by both parties.
Deadlines, declaration, and payment
Deadlines vary by level and canton. For cantonal stamp duty on private-deed contracts, the taxpayer must submit the instrument to the competent cantonal office within 60 days of execution (e.g. Art. 11 LBol in Ticino). For federal taxes, issuance tax and securities transfer tax generally fall due within 30 days of the tax claim arising; insurance premium tax within 30 days of the end of the quarter.
1. Verification
Upon contract execution, verify whether it falls within cantonal or federal taxable instruments and calculate the tax due.
2. Declaration
Submit the contract to the cantonal stamp duty office or, for federal taxes, to the FTA via the ePortal portal, stating the parties, amount, and calculated tax.
3. Payment
Transfer the amount to the competent authority within the cantonal or federal deadline. Retain a copy of the contract, the declaration, and proof of payment for at least five years (federal) or according to cantonal deadlines.
In case of omission or insufficient payment, the competent authority may claim back taxes with fines and default interest. Periodic internal review of financial contracts and active guarantees significantly reduces the risk of late assessments.
Accounting entries in Accountex
Contract stamp duty is a tax-deductible expense (except in particular cases linked to tax-exempt transactions). It must be recorded in the fiscal year in which the contract is concluded and the tax is paid or accrued.
| Transaction | Debit account | Credit account | Amount |
|---|---|---|---|
| Cantonal stamp duty payment on bank loan | 6300 Taxes and duties / 6570 Bank charges | 1020 Bank | Stamp duty amount |
| Stamp duty on shareholder loan (borne by company) | 6300 Taxes and duties | 1020 Bank | Stamp duty amount |
| Stamp duty charged by bank on statement | 6570 Bank charges | 1020 Bank | Amount charged |
| Issuance tax on capital increase | 6300 Taxes and duties | 1020 Bank | Stamp duty amount |
In Accountex, record each payment with the date, contract reference (loan number, execution date), and attach the stamping receipt or declaration as supporting documentation. If the chart of accounts distinguishes direct from indirect taxes, classify contract stamp duty under "Taxes and duties" rather than "Financial expenses", unless internal convention dictates otherwise.
For multi-year loans, cantonal tax is calculated on the full principal at conclusion of the private-deed contract, not on individual repayments. Contract amendments that increase the loan amount may trigger supplementary tax on the difference.
Creating a control entry in the contract register (loans, guarantees, leasing) with a "Stamp duty paid yes/no" field facilitates year-end checks and the auditor's work.
Practical scenarios for SMEs
Bridge loan from founding shareholder
An SME in Ticino receives CHF 80'000 from a shareholder interest-free, under a written loan contract. Cantonal stamp duty amounts to CHF 80 (1‰). The company submits the contract to the cantonal office within 60 days and records the amount to account 6300. In cantons without contract stamp duty, no payment is due. The absence of interest does not exempt from cantonal stamp duty where provided for.
Bank guarantee for office lease
The bank issues a rental guarantee of CHF 20'000 in favour of the landlord via a banking document. Cantonal tax on the banking document is CHF 10 (Ticino). An independent guarantee by private deed, not falling within the cantonal exhaustive list, is as a rule not subject to contract stamp duty. Verify whether the bank handles payment or whether the SME must do so.
Share transfer to new partner
A partner transfers GmbH shares for CHF 250'000 to a buyer via a bank. Federal securities transfer tax is calculated at 0.15% on the value (CHF 375 total, split between the parties). Cantonal private-deed contract stamp duty does not apply, as the transfer of participations falls under federal LTB. The bank generally handles payment to the FTA.
Common mistakes and how to avoid them
- ✕Confusing federal stamp duty and cantonal tax: federal taxes (LTB) apply to issuance, securities trading, and insurance. Cantonal stamp duty on private-deed contracts is a distinct institution, in force only in certain cantons — it does not replace and does not accumulate with a non-existent federal obligation on loans and guarantees.
- ✕Assuming the bank always handles everything: for private-deed shareholder loans and non-banking contracts, the stamping obligation often falls directly on the company, unless the annual substitute tax applies.
- ✕Applying incorrect rates or deadlines: the standard cantonal rate is 1‰ (not 0.5%), and the submission deadline is 60 days in cantons that provide for it (not 30). Always verify the applicable cantonal law.
- ✕Omitting accounting entries: even modest amounts (CHF 10–150) must be recorded for consistency of the income statement and audit traceability.
- ✓Best practice: integrate a "stamp duty" check into the contract approval workflow, with a checklist for loans, guarantees, and corporate transactions, and an automatic reminder at 45 days from execution.
Operational summary
Stamp duty on business contracts and documents in Switzerland operates on two levels: the three federal taxes (issuance, securities transfer, insurance) and, in certain cantons, cantonal tax on private-deed contracts — loans, sales of movable property, and construction contracts. The standard cantonal rate of 1‰ generates generally modest amounts, but the obligation must be verified canton by canton. Payment is due within 60 days of execution (cantonal) or according to LTB deadlines (federal), to the competent authority.
In accounting, treat stamp duty as a deductible expense under taxes and duties, document each payment, and link it to the corresponding contract. With Accountex and a structured contract register, compliance becomes a repeatable process that protects the SME from penalties and simplifies the work of the fiduciary and the auditor.