In many SMEs, risk does not appear when the company is already “losing money”, but before: when sales drop to a level where the cost structure can no longer support itself. For this reason, the break-even point and the margin of safety are two simple, yet especially useful tools to distinguish between an acceptable drop in sales and a truly dangerous situation.
The break-even point represents the sales level at which the company stops losing money in its ordinary activity. In simple terms, it is the minimum volume you need to invoice to cover fixed costs with the margin generated by sales.
Here it is important to properly differentiate the concepts. Fixed costs are those that remain even if sales decrease: rent, structural salaries, insurance, or certain basic services. On the other hand, the contribution margin is the part of each euro sold that remains available after covering variable costs, such as raw materials, subcontracting linked to production, commissions, or variable transport. This margin is what ultimately allows fixed costs to be absorbed.
The calculation of the break-even point consists of dividing fixed costs by the contribution margin on sales. It is not necessary to have a perfect analytical accounting system to calculate it. In many SMEs, it is enough to work with real data from recent months, as long as a consistent criterion is maintained that allows comparing evolution over time.
From there, the margin of safety comes into play, which measures how much sales can drop before reaching the break-even point. It is calculated by comparing current sales with the sales level corresponding to the break-even point.
And when does a drop in sales start to become dangerous? Mainly when the margin of safety is small and, furthermore, the fixed cost structure is rigid. If the margin of safety is below 10% and the company has little capacity to adjust expenses within a few weeks, any incident —the loss of an important customer, the delay of a project, or a seasonal drop in activity— can quickly turn into a serious problem.
From a financial point of view, the true value of these metrics is that they force the prioritization of decisions. When the company approaches the break-even point, there are only three major levers of action: increase the contribution margin (by raising prices, improving the sales mix, or reducing variable costs), reduce fixed costs (by adjusting structure and recurring expenses), or stabilize the sales volume through greater recurrence, portfolio diversification, and reliability in delivery and collection.
The break-even point and the margin of safety do not replace a financial budget or cash flow control, but they do offer an immediate reading of operational risk. And when sales begin to weaken, that capacity for a quick reading makes the difference between reacting with clear criteria and anticipation or doing so too late, when the problem has already moved to the cash position.
Having personalized support, such as that offered by the Economic Office of Galicia, can be key to a successful implementation. Request free specialized advice and take advantage of the available resources to boost your business.
