Merch Profit Calculator

This is a contribution margin calculation applied to a decorated physical product. Every cost that varies with one additional unit - the blank garment, the decoration, outbound shipping, packaging, and the marketplace commission - is subtracted from the selling price to give profit per unit. The platform fee behaves differently from the others because it is a percentage of price rather than a fixed amount, so raising the price also raises that cost and the margin improves more slowly than intuition suggests. Margin and markup are routinely confused: markup equals margin divided by (1 - margin), so a 40 percent margin requires a 67 percent markup, and a 100 percent markup yields only a 50 percent margin. Realistic apparel inputs are a blank tee at 3 to 8 US dollars in wholesale case quantities, direct-to-garment decoration at roughly 3 to 8 dollars per piece with no setup charge, and screen printing under 2 dollars per piece once a run passes about 50 units but with 20 to 40 dollars of setup per screen per color. Print-on-demand fulfillment typically puts the all-in product cost of a printed tee at 10 to 16 dollars. Note what the break-even figure here means: it is the number of units of profit needed to recover one unit of cost, not the recovery of a separate fixed investment. The model also excludes returns, which run 5 to 15 percent on made-to-order apparel, advertising spend, and any monthly storefront subscription.

The economics here rest on two separate inventions. Screen printing entered Western commercial use when Samuel Simon patented a silk stencil process in England in 1907, and American printers in the following two decades added photographic emulsion stencils, which made accurate multi-color reproduction on fabric practical. Heat-cured plastisol inks spread through the 1950s and 1960s and made the printed shirt cheap and durable enough to work as an advertising and merchandise medium; licensed character shirts sold in Florida in the late 1940s are among the earliest documented examples of the modern merch trade. The second invention removed inventory risk. Direct-to-garment inkjet printing became commercially practical in the mid-2000s, eliminating screen setup and therefore the minimum order quantity, and a layer of on-demand fulfillment companies was built on it - CafePress from 1999, Zazzle and Redbubble in the mid-2000s, Printful from 2013. That shifted the seller's central problem from unsold stock to margin management, since per-unit costs no longer fall meaningfully with volume and the platform takes a percentage of every sale. The analytical frame, separating variable cost per unit from fixed cost and reading the difference as contribution, comes from managerial accounting and the break-even charting developed in the first half of the twentieth century.