Break Even Calculator
Punch in your monthly overhead, unit price, and production costs to see the exact sales target where your venture stops losing cash and starts turning a profit.
How to Use This Calculator
I like having a hard number in front of me before spending a dime on inventory or tools. Here is how you can run your numbers in four quick steps:
-
1
Start with your recurring monthly overhead
Group together bills that come due whether you sell anything or not: workshop rent, software, domain hosting, insurance, and base payroll.
-
2
What will customers pay for one item?
Type in the retail checkout price for a single unit. Don't shave off payment processing fees yet — just use your sticker price.
-
3
Calculate your per-unit production expense
Every sale drains some cash. Add up raw blanks, ink, packaging boxes, postage, and processing fees tied to fulfilling one order.
-
4
Check your live target and profit floor
The card above spits out your volume quota and cash turnover instantly. You'll also see the net profit that stays with you on orders beyond that line.
The Formula
Break-even math boils down to four straightforward relationships that reveal how fast each sale chips away at your monthly bills:
Here is what each piece actually means when you run a real project:
- Fixed Costs: The monthly bills landing on your desk no matter what. Rent, software, and insurance don't care whether you had fifty customers or zero.
- Selling Price: The sticker price a buyer pays you at checkout for one distinct item or service package.
- Variable Cost: The cash spent making and fulfilling one unit. If you print a shirt, you pay for cotton and ink; if you sell nothing, this is zero.
- Contribution Margin: The leftover cash from one sale after covering its production costs. This money chips away at your fixed monthly bills.
- Contribution Ratio: The share of each sales dollar available for overhead. A 60% ratio means sixty cents pays rent, while forty cents buys materials.
Example
I find it easiest to picture a physical side hustle. Suppose you set up a custom screen-printed t-shirt brand from a rented workshop space. Here is how your monthly operating numbers shake out:
First, subtract your $10 variable shirt cost from the $25 retail price to find your contribution margin: $25 − $10 = $15 per shirt.
Next, divide your $10,000 fixed overhead by that $15 margin: $10,000 ÷ $15 = 666.67 shirts.
Because you can't sell two-thirds of a t-shirt, you round up: you must sell 667 shirts each month to break even. In revenue terms, that equals $16,675.00 in monthly sales (667 × $25). Those sales cover your $10,000 rent and $6,670 in blanks and ink. From shirt #668 onward, every shirt you sell puts the entire $15 margin directly into your pocket as pure profit. Honestly, GrabCalc is my first real money-making experiment — and I only calculated its break-even while building this very page. My costs are tiny, just about $12 a month for the domain and hosting, so that number now sits on my wall as the target.
Frequently Asked Questions
What is a break-even point?
It's the exact sales volume where incoming revenue matches total costs, leaving you at flat zero. Below that volume, you're funding the shortfall from your own pocket. Cross it, and each extra unit puts real cash in your wallet.
What are fixed vs variable costs?
Fixed bills hit your account monthly regardless of sales — rent, software, basic payroll. Variable costs only happen when an order ships, like blanks, boxes, and merchant swipe fees. Keeping those buckets distinct prevents painful budgeting surprises.
Why is the break-even rounded up?
You can't sell a fraction of an order. If math gives you 666.67 units, delivering 666 units leaves you short on rent. Rounding up to 667 guarantees every bill is fully paid.
How can I lower my break-even point?
You have three real levers: trim fixed bills, bump your unit price, or source cheaper materials. Even a modest price bump widens your margin and slashes the sales volume you need to stay afloat. Test a few inputs above to see your target drop.
Is break-even only for businesses?
Not at all. You can run break-even on rental properties, freelance contracts, or personal web projects. GrabCalc is my own test case: domain and hosting fees cost real money each month. Sooner than people would think, actually. With costs that small, the first month AdSense pays even a few dollars, GrabCalc is officially past its break-even — I'm expecting that sometime around the end of this year. After that, every dollar is pure margin. Any effort pairing fixed overhead with per-unit revenue benefits from this calculation.