Business expenses: flat-rate reimbursement or actual costs — which should you choose?

A restaurant receipt, a train ticket, a few kilometers in a private car: reimbursement seems simple until payroll, the salary certificate, AVS and taxation each require their share of explanations.

For a Swiss employer, the issue is not simply choosing between receipts and a fixed amount. Three mechanisms must first be distinguished: reimbursement of the amount actually paid, a rate per event, such as a meal or kilometer, and a flat-rate allowance paid monthly or annually. They are not treated identically.

For many SMEs, the best solution is a combination: significant expenditure is reimbursed against receipts, frequent travel may use per-event rates, and periodic allowances are reserved for roles that genuinely incur regular expenses.

Which expenses must an employer reimburse?

Article 327a of the Code of Obligations requires employers to reimburse expenses necessary for performing work. Where an employee works away from their usual workplace, necessary subsistence expenses may also be covered. A fixed allowance is permissible if based on a written agreement, standard employment contract or collective agreement and if it actually covers all necessary expenses.

The starting point is therefore the reason for the expense. A journey requested to visit a client, a hotel during an assignment, a meal required by business travel or authorized business use of a private vehicle are typical business expenses. By contrast, ordinary commuting, personal convenience expenditure or a meal taken in normal circumstances do not become business expenses through an internal decision alone.

This distinction protects both parties. An insufficient allowance may leave the employee with a claim against the employer. Conversely, an allowance without corresponding business expenses may be reclassified as taxable salary subject to social contributions.

Three methods, not two

The key distinction is this: an allowance calculated for each expense actually incurred may be treated as actual reimbursement even if the amount follows a rate schedule. An identical allowance paid every month regardless of the number of journeys is a periodic flat-rate expense allowance.

Actual reimbursement: the most robust solution

Reimbursement against evidence links each payment to an expense, date, person and business purpose. It is the preferred method for hotels, air or rail travel, client hospitality and unusual expenditure.

Under the 2026 Salary Certificate Guide, amounts need not be itemized where all stipulated conditions are met. Generally, ticking the box under item 13.1.1 is then sufficient. The main reference points are:

These limits do not remove the need to establish that the journey actually took place and served a business need. Nor are they blanket authorization to pay the maximum automatically. If the conditions are not met and no approved regulations cover the situation, the reimbursed amount must be stated under item 13.1.1 of the salary certificate.

Flat-rate allowances: simpler, but harder to design properly

Monthly or annual allowances are appropriate where certain roles regularly incur small expenses that are difficult to document: senior management, field staff or employees who use their private vehicle very frequently for business.

The amount must remain close to expenses actually borne. For representation expenses, intercantonal recognition guidelines provide that, where the allowance exceeds CHF 6’000 per year, it must not exceed 5% of gross salary including variable remuneration, with an absolute ceiling of CHF 24’000. These are recognition limits, not an automatic entitlement to receive 5% of salary without justification.

The model regulations updated on January 1, 2026 also provide, subject to conditions, for:

• a monthly flat-rate allowance of CHF 50 for necessary business use of private infrastructure, including a computer, telephone, internet connection or office supplies;
• a maximum monthly allowance of CHF 60 for charging an electric company vehicle at home.

These amounts are not tax-free allowances that any company can distribute. They must correspond to a real situation and, to secure their treatment, form part of compliant, approved regulations. Monthly or annual allowances must also be reduced for uninterrupted absences exceeding four weeks for the period beyond that threshold, except holidays under the model regulations.

What does tax approval change?

The approval request is submitted to the tax authority of the canton where the employer has its registered office. Regulations consistent with Swiss Tax Conference models are generally recognized by other cantons. The salary certificate must then state the approving canton and approval date under item 15.

Approval does not make allowances invisible: periodic amounts still appear under item 13.2 of the salary certificate. For AVS purposes, the compensation office may adopt the tax regulations if they comply with AVS law and the amounts are not manifestly excessive. In other words, tax approval is strong protection, but not a magic shield against every social insurance check.

Comparison: which method should you choose?

For a small business with only occasional travel, a monthly allowance often creates more risk than the work it removes. Conversely, asking a sales director working in the field four days a week for a receipt for every minor expense may produce very precise but rather unintelligent administration.

Practical example: a consulting SME

An SA employs twelve people. Eight employees rarely travel: their tickets, hotels and meals are reimbursed at actual cost. Three sales staff sometimes use private vehicles and record their journeys. For 1’200 business kilometers, an allowance at CHF 0.75 totals CHF 900; ten eligible meals at the per-event rate of CHF 30 total CHF 300.

The managing director also incurs recurring small representation expenses. After analyzing a representative period, the company considers an annual allowance of CHF 4’800, restricted to precisely defined expense categories. This amount is defensible only if it matches expected costs, does not duplicate reimbursements against receipts and is correctly included in the regulations and salary certificate.

The chosen solution is therefore mixed: actual expenses for significant expenditure, per-event rates for measurable travel and a targeted periodic allowance solely for management’s incidental representation expenses.

A practical method in seven steps

1. Map expenditure: transport, meals, hotels, representation, private vehicles, remote working and other expenses.
2. Distinguish roles: a uniform allowance for the whole team is rarely coherent where roles do not generate the same costs.
3. Choose the right unit: receipt, kilometer, meal, travel day or monthly/annual period.
4. Measure actual costs: use a representative period before setting a periodic allowance and retain the rationale.
5. Draft the regulations: define covered expenses, exclusions, approvals, supporting evidence and the prohibition on double reimbursement.
6. Obtain approval where necessary: particularly for periodic allowances or arrangements beyond the Guide’s simple framework.
7. Configure and check: accounting entries, payroll, salary certificate items 13.1/13.2/15, extended absences and annual review.

The most common mistakes

• paying a round amount to all employees without a link to costs actually borne;
• confusing business travel with ordinary commuting;
• reimbursing the same expense twice, once through an allowance and once against a receipt;
• omitting periodic allowances from item 13.2 of the salary certificate;
• treating tax approval as automatically binding on AVS;
• setting an allowance so low that it fails to cover necessary expenses imposed on the employee;
• keeping an old allowance after the role, working percentage or travel frequency has changed.

The opposing view: is a flat rate always simpler?

A flat rate reduces daily data entry but shifts the effort upstream: expense analysis, drafting, approval, payroll configuration and periodic checks. For a few expense claims per quarter, that detour is generally not worthwhile.

The tax authority or AVS office will argue that an amount without corresponding expenditure is salary. The employer will rely on its regulations, historical data and the actual roles concerned. The employer’s case is stronger when covered categories are precise, duplicates are blocked and amounts are reassessed as circumstances change.

Frequently asked questions

Official sources

• Code of Obligations, in particular Articles 327a and 327b
• FTA — Salary certificate and expense regulations
• Salary Certificate Guide, valid from January 1, 2026
• Model expense reimbursement regulations, updated on January 1, 2026
• FSIO — Guidelines on salary subject to AVS, AI and APG

Update: the review of September 1, 2026, including the AVS guidelines as at May 1, 2026, identified no material change to the rules set out above.

Last legal review: September 1, 2026.