The break-even point is the single most important number a small apparel business needs to know before spending money on advertising, launching a new design, or committing to a production run. It tells you exactly how many units you need to sell in a given period just to cover all your costs — the point at which you stop losing money and start making it.
Understanding break-even is not complicated, but it requires separating your costs into two categories and thinking about your business slightly differently than most sellers do. Once you understand it, every business decision — how much to spend on ads, whether to run a sale, whether a new product is worth launching — becomes much easier to evaluate.
This guide explains the concept, walks through a complete calculation for a typical t-shirt business, and shows you how to use break-even analysis to make better decisions about pricing, volume, and marketing spend.
Break-even analysis is built on the difference between two types of cost.
Fixed costs are costs you pay every month regardless of how many units you sell. Your Shopify subscription costs €27 whether you sell 10 shirts or 1,000 shirts. Your design software subscription, your workspace rent if you have one, your email marketing platform — these are all fixed. They exist before you make a single sale and they do not change with your sales volume.
Variable costs are costs that exist only when you make a sale. The blank garment, the print cost, the packaging, the shipping, the platform fee, the payment gateway fee — none of these costs exist unless a transaction happens. Every shirt sold generates these costs. Every shirt sold also generates revenue. The gap between revenue and variable cost per unit is called the contribution margin.
Break-even is the point at which your total contribution margin equals your total fixed costs. Before that point you are making a loss. After it you are in profit. The formula is:
Break-even units = Fixed costs divided by contribution margin per unit.
That is the whole calculation. Everything else is just filling in the right numbers.
Make a list of every cost your business pays monthly regardless of sales. Be thorough. Common fixed costs for a t-shirt seller include:
E-commerce platform subscription — Shopify Basic €27, Etsy Star Seller programme €10, or WooCommerce hosting €10 to €20. Design and creative tools — Adobe Creative Cloud €55, Canva Pro €13, Placeit or similar mockup subscription €15 to €30. Marketing and SEO tools — keyword research software, email marketing platform, social scheduling tools. These typically total €20 to €60 per month for a small seller. Any physical costs — workspace rent, electricity if you print in-house, equipment leasing. Marketing budget — if you run a fixed monthly ad spend rather than a per-sale budget, include it here.
A realistic monthly fixed cost total for a small Shopify-based t-shirt seller who outsources printing and uses basic tools: €80 to €150 per month. For a seller with their own DTF setup and workspace: €400 to €800 per month depending on location and equipment costs.
Your contribution margin is what is left from each sale after all variable costs are paid. It is what each unit contributes toward covering your fixed costs — and eventually toward profit once fixed costs are covered.
Take your selling price and subtract every cost that exists only because of that sale. For a typical Shopify seller using DTF printing at a €28.00 selling price:
Selling price: €28.00. Blank garment (Bella+Canvas 3001): €9.00. DTF print cost: €5.00. Packaging: €0.60. Shipping: €4.50. Shopify payment processing (2.9% plus €0.30): €1.112. Total variable cost: €20.212. Contribution margin per unit: €7.788.
Each shirt sold contributes €7.79 toward covering your fixed costs. Before you have sold enough units to cover your fixed costs you are in the red. Every unit sold after break-even is pure profit (minus your time cost).
With fixed costs and contribution margin calculated, the break-even formula is simple. Using the example above with monthly fixed costs of €120:
Break-even units = €120 divided by €7.788 = 15.4 units. Round up to 16 units.
You need to sell 16 shirts per month just to cover your fixed costs. Every shirt from unit 17 onwards generates €7.79 in profit.
At 30 units per month your monthly profit is (30 minus 16) multiplied by €7.79 = €109.06. At 50 units per month: (50 minus 16) multiplied by €7.79 = €264.86. At 100 units per month: (100 minus 16) multiplied by €7.79 = €654.36.
This is why scale matters in a fixed-cost business. Your fixed costs stay the same. Your contribution margin per unit stays the same. Every additional unit above break-even drops directly to profit.
This is where break-even analysis becomes particularly valuable for marketing decisions. When you start spending on advertising, you are adding a cost that can be treated either as fixed (a set monthly budget) or variable (a per-sale cost). How you treat it changes your break-even calculation.
If you set a fixed monthly ad budget of €150, add it to your fixed costs. New fixed costs: €270 per month. New break-even: €270 divided by €7.788 = 34.7, rounded to 35 units per month. Your ad spend has more than doubled your break-even requirement.
This is the critical check before launching any paid campaign. Can you realistically sell 35 units per month given your current traffic, conversion rate, and the audience size you can reach with €150 in ads? If the answer is no, the campaign will lose money regardless of how well the ads perform on click-through metrics.
Alternatively, treat ad spend as a variable cost by calculating your cost per sale. If €150 in ads generates 15 incremental sales, your CAC is €10.00 per sale. Subtract this from your contribution margin: €7.788 minus €10.00 = negative €2.212. Every ad-driven sale loses €2.21. The campaign is unprofitable regardless of volume.
This is one of the most common ways t-shirt sellers lose money. They run ads, see sales, assume the business is working, and do not realise until much later that each ad-driven sale was costing them money rather than making it.
Break-even analysis is equally useful when deciding whether to launch a new design or product. The question to ask is not "will this sell?" but "will this sell enough to justify the costs?"
If you are considering a screen print run of 50 units at €25.00 per shirt with a setup cost of €60 and per-unit cost of €12.00 including blank, you need to know how many units you need to sell to recover the setup cost before you start making money.
Variable cost per unit (excluding setup): €12.00. Selling price: €25.00. Contribution margin: €13.00. Setup cost as additional fixed cost: €60.00. Break-even for this run: €60 divided by €13.00 = 4.6 units, rounded to 5 units. You need to sell 5 shirts from this run just to recover the screen setup cost.
At 50 units that setup cost is only €1.20 per shirt — very manageable. But if you only sell 10 units from the run you have spent €60 in setup to generate (10 minus 5) multiplied by €13.00 = €65.00 in contribution — barely covering the setup with no contribution left for your monthly fixed costs.
Knowing the break-even for a specific run before you commit to it is the difference between a calculated risk and a blind one.
The T-Shirt Profit Margin Calculator automatically calculates your monthly break-even units as one of its primary outputs. It uses your variable cost inputs to calculate contribution margin, then divides your total monthly fixed costs (overhead plus marketing spend) to give you a break-even unit target.
Enter your real numbers and the calculator will tell you how many shirts you need to sell each month before you start making money. If that number feels unreachable at your current traffic and conversion rate, you have three levers: reduce fixed costs, reduce variable costs to improve contribution margin, or raise your selling price.
If you need help understanding the specific cost structure of DTF printing in Cyprus and the EU — including current supplier pricing that feeds into accurate variable cost calculations — TshirtJunkies.co prints using DTF and DTG and is happy to share realistic cost benchmarks for the European market.
The calculator shows your monthly break-even unit target automatically. Enter your costs and selling price and see exactly how many shirts you need to sell before you start making money.