Break-Even Analysis: How to Know Exactly When Your Business Starts Making Money

What break-even analysis tells you#

Break-even analysis answers the most fundamental question in any business decision: how much do I need to sell to cover this cost? Before hiring, opening a new location, launching a new product, or increasing marketing spend, break-even analysis tells you the incremental revenue required to justify the cost. It transforms vague optimism into a specific, testable hypothesis.

The break-even formula#

Break-Even Revenue = Fixed Costs / Gross Margin %. If your fixed costs are £80,000 per month and gross margin is 40%, your break-even revenue is £80,000 / 0.40 = £200,000 per month. In units: Break-Even Units = Fixed Costs / (Selling Price − Variable Cost Per Unit). At £50 price, £20 variable cost, and £80,000 fixed costs: £80,000 / (£50 − £20) = 2,667 units per month.

Break-even for hiring decisions#

Every new hire increases your fixed cost base. If a new hire costs £45,000 per year fully loaded, the break-even question is: what incremental revenue does this hire need to generate? At a 40% gross margin: £45,000 / 0.40 = £112,500 of incremental annual revenue — £9,375 per month. If a salesperson can generate £25,000 per month in new revenue within 3 months, the hire easily passes the break-even test.

Margin of safety: how far above break-even are you?#

The margin of safety is the difference between your actual revenue and your break-even revenue, expressed as a percentage. If you generate £300,000 monthly revenue and your break-even is £200,000, your margin of safety is 33%. Revenue can fall 33% before you break even. A margin of safety below 15% suggests the business is vulnerable to any revenue shock.

Tracking break-even in AskBiz#

AskBiz calculates your break-even point from your connected financial data — tracking your fixed cost base and gross margin continuously and recalculating your break-even revenue as both change. It also shows your current margin of safety as a real-time metric. Ask it: what is my current monthly break-even revenue, what is my margin of safety at current revenue levels, how many units of Product X do I need to sell to break even on the launch investment.