Why business interruption threatens more than physical assets
A warehouse fire, a flood that swamps the workshop, an electrical failure that halts production for weeks: for a Swiss SME, material damage is only the visible part of the loss. While building and goods insurance reimburses destroyed assets, a more dangerous gap often remains: no revenue, fixed costs that keep coming due, and customers who in the meantime turn to other suppliers.
Business interruption insurance — in German Betriebsunterbrechungsversicherung, often abbreviated BU — covers precisely this gap. It compensates for lost operating profit (contribution margin) and additional costs incurred to resume operations, within contractual limits. For a business with thin margins or only a few months of liquidity, the difference between having or not having this coverage can determine whether the company survives after a major event.
This guide explains how BU works in the Swiss context, what to check before taking out a policy, which exclusions most often surprise SMEs, and how to link policy, cash budget, and accounting — including with tools such as Accountex — so you do not discover too late that you are underinsured.
What is covered and what is excluded: overview for SMEs
BU policies are not standardised like OASI or VAT: each insurer defines coverage limits, deductibles, and indemnity periods. The summary comparison below helps you navigate the most common clauses on the Swiss market:
| Aspect | Generally covered | Often excluded or limited |
|---|---|---|
| Triggering event | Fire, natural hazards (hail, flood if insured), water damage, theft with structural damage, machinery breakdown (if included) — subject to material damage covered by property insurance | Pandemics, market crises, recession, internal strikes, management errors without material damage |
| Object of compensation | Loss of contribution margin, ongoing fixed costs (rent, non-productive wages, leasing), extra expenses to limit the damage | Loss of net profit, lost future earnings beyond the contractual period, undocumented contractual penalties |
| Duration | Typical indemnity period: 12–24 months from the start of the interruption (after the waiting period), until operations resume or the maximum contractual term is reached | Short interruptions below the waiting period (e.g. first 3–14 days borne by the business) |
| Sum insured | Calculated on an annual basis of the insured margin, with the option of annual adjustment | Exceeding the sum insured: the excess remains the business's responsibility (underinsurance risk) |
| Link | Extension of fire/natural hazards insurance or the business package policy | Interruption without material damage covered by the base policy (e.g. uninsured disruption at a foreign supplier) |
| Tax treatment | Premium deductible as operating expense; BU compensation for lost operating profit generally taxable | Confusion with property insurance payouts for reconstruction (different accounting and tax rules; clarify with your fiduciary) |
How compensation is calculated: margin, period, and waiting period
BU does not reimburse "what you lose in the bank", but an amount derived from parameters agreed at the time the policy is taken out. Understanding them avoids disappointment when a claim occurs:
Insured margin
It usually corresponds to the contribution margin (revenue minus variable costs), known in Swiss insurance as versicherungstechnischer Bruttogewinn, or to a lump-sum amount stated in the policy. For a manufacturing SME, it often includes lost value added; for retail, the trading margin on sales not made.
If revenue grows by 30% after the policy is taken out and the policy is not updated, in the event of a claim the compensation remains tied to the old sum insured — a typical mistake for fast-growing businesses.
Indemnity period and waiting period
The indemnity period (Indemnisationsdauer, in German Haftzeit) defines how long the insurer pays lost earnings from the start of the interruption, net of the waiting period. An SME with long procurement lead times (imported machinery, certifications) should consider at least 18–24 months.
The waiting period (Wartezeit) is the number of initial days not covered — often 3, 7, or 14. During this interval, liquidity must be secured from own reserves or credit lines.
Impact on liquidity: the role of BU in cash flow
For an average Swiss SME, monthly fixed costs — rent, wages, leasing, insurance, loan repayments — can absorb all working capital within a few weeks if revenue drops to zero. BU does not replace careful cash management, but acts as a structured buffer between the day of the claim and the resumption of operations.
Consider a simplified example: a mechanical workshop with CHF 80'000 monthly contribution margin and CHF 55'000 fixed costs. A fire halts production for four months. Without BU, the business must finance CHF 220'000 in fixed costs plus any recovery expenses, while collecting only sporadic work income. With a policy covering lost margin and unavoidable fixed costs, monthly compensation can approach CHF 80'000 — enough to cover wages and rent until the production line is operational again.
| Cash item | Without BU | With adequate BU |
|---|---|---|
| Income during interruption | Almost nil or residual | Compensation from the insurer (often as interim payments during the interruption) |
| Outflows (fixed costs) | Continue unchanged | Largely covered by compensation |
| Credit requirement | Rapid reliance on bank or bridge financing | Reduced; reserves or credit lines as buffer for the waiting period |
| Insolvency risk | High if interruption exceeds 2–3 months | Contained, if sum insured and duration are calibrated correctly |
Treasury and accounting tools such as Accountex let you monitor projected cash balance and compare it with the policy's waiting period: if available liquidity covers less than 30 days of fixed costs, BU becomes even more relevant, but it must be sized using up-to-date data from your management system.
Sector risk profiles: who needs it most
Not all SMEs face the same interruption exposure. Risk increases when the business depends on few physical assets, a single location, or machinery that is not easily replaced:
Retail and hospitality
Immediate interruption of revenue; customers easily lost. Pay attention to seasonality when calculating the insured margin and to costs for storing perishable stock.
Manufacturing and crafts
Long machinery replacement times and staff retraining. Consider extensions for machinery breakdown and extended indemnity periods.
Services and professional firms
Lower risk if work can continue remotely, but severe interruption if the sole premises are unusable. Insured margin based on hourly billing and team fixed costs.
BU, accounting, and taxation: what to record and when
The annual BU premium is recorded as an operating expense (account 6xx insurance) and is deductible from the taxable income of the company or sole proprietorship, as a justified business expense. The amount varies by sector, sum insured, and period chosen: for an SME with CHF 500'000 insured margin, the premium can typically range from CHF 1'500 to CHF 4'000 per year — figures to verify with your local broker.
In the event of a claim, compensation received must be booked with careful attention to its economic nature. If it replaces lost revenue or operating margins, it is generally taxable for income and profit tax purposes. If it comes from property insurance and covers reconstruction of an asset, it may flow into assets without immediate taxation. The fiduciary must distinguish between the portion that replaces lost revenue and that allocated to investments.
To speed up claim settlement, the insurer requires precise documentation: income statements for the last 3 financial years, budgets, list of fixed costs, proof of interruption (fire brigade reports, expert assessments, cancelled orders). Keeping this data organised in accounting software reduces waiting time for compensation — critical precisely when cash is tight.
Five common mistakes by Swiss SMEs
Confusing property insurance and BU
Covering the building and machinery without a BU extension leaves the most serious cost exposed: months without revenue while wages still have to be paid.
Underinsurance on the sum insured
Policy taken out years ago with revenue 40% lower. In the event of a claim, the underinsurance rule (Unterversicherung, Art. 51a ICA/VVG) reduces compensation proportionally.
Indemnity period too short
Twelve months may not be enough if cantonal building permit timelines and machinery delivery lead times exceed one year.
Ignoring the waiting period
Not provisioning liquidity for the first uncovered days means turning to credit precisely when rates are least favourable.
Assuming pandemic coverage
After COVID-19, many policies explicitly exclude epidemics. Ask your broker for written confirmation before relying on generic clauses.
Checklist before signing or renewing the policy
Use this list with your insurer or fiduciary to calibrate coverage to your business's real numbers:
- ✓Calculate the average monthly contribution margin over the last 12 months (not revenue alone)
- ✓List fixed costs that would continue during a total production shutdown
- ✓Estimate realistic time to resume operations, including cantonal permits and supplier lead times
- ✓Verify that the same natural hazard risks (flood, earthquake) are covered on both property and BU
- ✓Compare the waiting period with available liquidity reserves (cash alert threshold in your management system)
- ✓Plan an annual adjustment of the sum insured linked to revenue growth
- ✓Archive in accounting the documents needed for claim settlement (income statement, budget, leasing contracts)
Integrating BU into day-to-day financial management
Business interruption insurance is not an optional extra reserved for large industrial companies. For a Swiss SME with significant fixed costs and limited liquidity, it is the natural complement to fire insurance and the most concrete defence of cash flow when an unforeseen event halts operations.
The policy only makes sense if sized on up-to-date accounting data: sum insured, duration, and waiting period must align with the cash budget and fixed-cost plan. Reviewing it at least once a year — preferably alongside the budget or interim closing — avoids paying an inadequate premium or, worse, finding yourself uncovered when you need it most.
With orderly accounting and tools that show revenue, outflows, and liquidity thresholds in real time, the business owner can turn BU from an abstract insurance line into a measurable component of their operational continuity plan.