Break-Even Calculator
Find out exactly how many units — or how much revenue — you need before you stop losing money, plus your margin of safety above that point.
Below the break-even point you're operating at a loss (total cost line above revenue line); above it, every extra unit sold is pure contribution to profit.
Break-Even Doesn't Tell You If You're Profitable — It Tells You Exactly Where You Stop Losing Money
It's tempting to treat "break-even" and "profitable" as the same milestone, but they're not — break-even is the floor, not the goal. It's the precise sales volume at which your revenue exactly equals your total costs: no profit, no loss. Sell one unit less than that in a month and you've lost money. Sell one unit more and, from that unit onward, almost all of it drops straight to profit, because your fixed costs are already covered. Treating break-even as a target rather than a floor is how businesses end up "surviving" month after month without ever building a cushion.
The Three Numbers Everything Else Is Built On
Break-even analysis rests on separating your costs correctly, which trips up more businesses than the maths itself does:
- Fixed costs — the amount you pay whether you sell 1 unit or 10,000: rent, base salaries, insurance, loan EMIs, software subscriptions.
- Variable cost per unit — the amount that only exists because you made and sold that unit: raw materials, packaging, per-item labour, payment processing fees.
- Contribution margin — Selling Price − Variable Cost per Unit. This is what's left over from each sale to first pay off your fixed costs, and then become profit once they're covered.
Misclassifying a cost is the most common error here — packaging and card-processing fees are easy to forget and quietly get lumped into "overheads" as a fixed cost, which understates your variable cost and makes your contribution margin look bigger than it really is. That, in turn, makes your break-even point look lower than it actually is.
Worked Example: A Small Bakery
Say you run a small bakery selling a signature cupcake. Monthly fixed costs — rent, a part-time assistant's salary, insurance — come to ₹45,000. Each cupcake sells for ₹60, and the ingredients, packaging, and share of utilities work out to ₹22 in variable cost per cupcake.
Contribution margin = ₹60 − ₹22 = ₹38 per cupcake (a 63.3% contribution margin ratio).
Break-even units = ₹45,000 ÷ ₹38 = 1,184.2 → round up to 1,185 cupcakes a month.
Break-even revenue = 1,185 × ₹60 = ₹71,100.
If you're actually selling 1,500 cupcakes a month, your margin of safety is 1,500 − 1,185 = 315 units, or 21% of current sales — meaning sales could drop by 21% before you'd slip back into a loss. And if you wanted a ₹20,000 monthly profit rather than just breaking even, you'd need (₹45,000 + ₹20,000) ÷ ₹38 = 1,710.5 → 1,711 cupcakes a month, which is the number this calculator's "target profit" field solves for automatically.
Margin of Safety — Your Cushion Above Break-Even
Margin of safety answers a different, equally important question: not "when do I stop losing money," but "how far could sales fall before I would." A thin margin of safety (say, under 10%) means a routine slow month or a single lost client could tip you back into a loss — worth knowing before you take on new fixed costs like a lease renewal or a new hire. A wide margin of safety gives you room to absorb a bad month, discount aggressively during a promotion, or invest in growth without immediately risking the bottom line.
How to Use This Calculator
- Enter your total fixed costs for the period you're analysing — almost always easiest done monthly.
- Enter the selling price and variable cost for a single unit, service, or average transaction.
- Optionally add your current or expected sales volume to see your margin of safety, and a target profit figure to see exactly how many units get you there.
- The chart plots your revenue line against your total cost line — the point where they cross is your break-even point; everything to the right of it is profit territory.
Frequently Asked Questions
It means you're covering your costs, which is a real milestone — but "doing well" usually implies a healthy margin of safety and enough profit to reinvest or draw an income from. Treat break-even as the line between loss and survival, not the finish line.
Many real costs are semi-variable — a phone bill with a base fee plus usage charges, for instance. The common approach is to put the base/minimum amount in fixed costs and estimate the per-unit portion as variable, rather than forcing the whole cost into one bucket.
Yes, all else equal — a higher price increases contribution margin per unit, so you need fewer units to cover the same fixed costs. But it can also reduce demand, so the real-world effect on total sales volume matters just as much as the arithmetic.
Profit margin (see our Profit Margin Calculator) tells you what share of each sale is profit. Margin of safety tells you how much your total sales volume could fall before you'd have no profit at all — one is about a single sale, the other is about how much cushion your whole sales volume has.
No — every number stays in your browser for the calculation and nothing is stored, uploaded, or transmitted.
Conclusion
Break-even analysis turns a vague worry — "are we making enough?" — into three concrete numbers: how many units you need to sell, how much revenue that represents, and how much cushion you currently have above that line. Get your fixed and variable costs classified honestly, and the rest is just arithmetic this calculator handles instantly.