Sideways Interest Rate Movement 2026 – Why Your Annual Budget is Now a Dangerous Tool

The budget for 2026 was approved in most companies in the autumn of the previous year. It is based on assumptions and targets that seemed plausible at the time. However, the current economic situation paints a different picture. Despite stable key interest rates, uncertainty prevails. This discrepancy makes rigid budgeting a danger to company management. An effective cash flow forecast for an SME in Switzerland today requires more than just an annual plan. It demands a method adapted to budgeting uncertainty in 2026, considering factors like the need for a rolling forecast for interest rates.

The Deceptive Stability of the Annual Budget

A budget is a central management tool. It translates corporate strategy into financial targets and serves as a benchmark for performance measurement. It sets budgets for departments and controls expenditure. This function is undisputed and important. However, a budget is not a forecasting tool. It represents a plan based on a set of assumptions at a specific point in time.

In phases of stable economic growth and predictable market conditions, this approach works well. Deviations from the plan are usually minor and can be corrected through operational measures. Annual budgeting provides a clear framework and creates commitment within the organisation. The finance department can focus on monitoring budget compliance.

The current environment is not stable. Economic sentiment among Swiss SMEs fell to its lowest level since 2021 in 2026 (Unternehmen NZZ 2026). Geopolitical risks, uncertain trade policy and administrative hurdles are weighing on the outlook. The full extent of these factors was hardly foreseeable when the 2026 budget was prepared. As a result, the budget becomes obsolete more quickly than usual. A growing gap emerges between the planned and actual development.

Sideways Movement: Why Stable Interest Rates Don't Mean the All-Clear

The Swiss National Bank is keeping its key interest rate stable. For many finance managers, this may seem like a reassuring signal. Stable financing costs make it easier to calculate and plan investments. However, this stability in itself is not an indicator of a secure economic development. Rather, it is a reaction to a complex and fragile equilibrium.

The OECD forecasts a low inflation rate of 0.6% for Switzerland in both 2026 and 2027 (Moneycab 2026). This points to low inflationary pressure. At the same time, it makes the economy vulnerable to external price shocks, for instance in energy or raw materials. Such unforeseen events can hit a company's cost base quickly and significantly. The margins set out in the budget come under pressure.

The combination of low growth, external risks and subdued sentiment among SMEs (Unternehmen NZZ 2026) creates a dangerous sideways movement. The major indicators are barely moving, but the risks are increasing beneath the surface. A static annual budget can only inadequately reflect this dynamic. It becomes a rear-view mirror, suggesting a security that can be deceptive in this environment. Important decisions on liquidity management are thus based on outdated data.

From Annual Budget to Rolling Cash Flow Forecast

The solution is not to abandon planning altogether. It lies in supplementing the static budget with a dynamic process. A rolling forecast is such a tool. It does not look at a fixed calendar year, but at a constant time horizon into the future — for example, the next 12, 18 or 24 months.

This forecast is updated at regular intervals, typically monthly or quarterly. With each update, the forecast period is extended back to its full length. The process prompts the finance department and management to continuously review the original budget assumptions. These assumptions are adjusted based on the latest available actual figures and market assessments.

A rolling forecast can help to close the gap between strategic annual planning and day-to-day operations. It makes the chain from ERP export to analysis to management report more flexible. The key differences to the traditional budget can be summarised as follows:

• Time horizon: The budget has a fixed end point, usually 31 December. The forecast maintains a constant time horizon, for example, the next 18 months.
• Updates: The budget is created once a year. The forecast is updated periodically, for example monthly, with the latest actual figures and expectations.
• Focus: The budget concentrates on resource allocation and cost control. The forecast focuses on predicting liquidity and the early detection of deviations.
• Level of detail: The budget is often very detailed at the account level. A forecast can work at a more aggregated level to remain agile and clear.

Practical Steps for Implementing a Rolling Forecast

Introducing a rolling forecast does not mean replacing existing systems like the ERP. The process builds on the data already available in the company. In many SMEs, the data processing chain is mapped out in Excel. A forecast model can also be built in Excel without immediately requiring large investments in new software.

The first step is to identify the key drivers. Which few, but crucial, factors determine revenue, costs and thus cash flow? These could be incoming orders, production capacity utilisation, raw material prices or customer payment behaviour. Concentrating on these drivers keeps the model lean and understandable.

The second step is to define a clear and simple process. Who provides the information for the drivers? Who is responsible for updating the model? At what frequency is the forecast created and discussed with management? Commitment and regularity are essential for success.

The goal is not to predict the future with pinpoint accuracy. That is impossible. The goal is an improved basis for business decisions. A good forecast identifies potential liquidity bottlenecks or surpluses at an early stage. It enables management to act proactively instead of just reacting to events that have already occurred.

What You Can Do This Month

You do not have to change the entire budgeting process immediately. Start with a simple but effective tool: a short-term cash flow plan. This method is also known as a 13-week cash flow forecast.

Take your current cash and cash equivalents as a starting point. List the main expected cash inflows for the coming 13 weeks. Take into account outstanding receivables and average payment terms. Contrast these with the expected cash outflows, such as wages, rent, supplier invoices and taxes.

Update this simple overview weekly. Compare the previous week's forecast figures with the actual cash flows that occurred. This variance analysis is valuable. It sharpens your understanding of your company's cash flow dynamics and can improve forecast quality over time.

This process creates a solid, data-driven basis. It puts you in a position to have well-founded discussions with the executive management, the board of directors or the banks. You can show where action is needed at an early stage and initiate measures before a problem becomes critical.

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