Break-even point: how many sales cover your costs?

Break-even is the sales level where contribution covers fixed costs for a chosen period. It does not automatically mean cash flow is healthy or that an initial investment has been recovered. The model describes a specific revenue-and-cost relationship.

Start with one time period

Do not add monthly rent to an annual software charge without converting them to the same period. Fixed costs do not immediately change with each unit sold. Variable cost is the additional product, packaging or processing cost of one more sale.

Fixed costs of 30,000

Assume a selling price of 500 and variable cost of 350 per unit.

• Contribution per unit: 500 − 350 = 150
• Break-even units: 30,000 ÷ 150 = 200
• Break-even revenue: 200 × 500 = 100,000
• Average over 30 days: 200 ÷ 30 ≈ 6.67 sales per day

The break-even calculator shows these results together. The daily figure is a simple 30-day average. Adjust your operational plan to actual selling days.

Why round units up?

If fixed costs were 30,100, the result would be 200.67 units. Assuming whole products, at least 201 sales are needed. The tool rounds units up and uses that rounded quantity for revenue.

How a cost change affects the target

If variable cost rises to 400, contribution falls to 100. Covering the same fixed costs now requires 300 sales. A cost increase of 50 raises the unit target by 50%. Recalculate contribution whenever testing a discount or supplier price change.

Zero or negative contribution

When price equals variable cost, each sale contributes nothing towards fixed costs. When price is lower, each additional sale increases the shortfall. With positive fixed costs there is no finite break-even quantity under those conditions.

The simple model assumes one product or a stable sales mix. Multiple products require a weighted contribution calculation. Use consistent tax treatment, and assess inventory payments, credit terms and collection timing separately. Review your margin and markup assumptions before setting volume targets.