<\/p>\n
An ecommerce shop\u2019s busiest holiday season could also be its least profitable.<\/p>\n
Ecommerce businesses face direct variable costs with every order. Two orders with the same revenue and gross profit might produce different bottom-line profits.<\/p>\n
Without an understanding of those costs, an entrepreneur could think the business is succeeding when it\u2019s actually failing.<\/p>\n
Take shipping and fulfillment, for example. Merchants face two cost increases this 2026 holiday season<\/a>.<\/p>\n Each order delivered via USPS or FBA during those periods contributes a little less.<\/p>\n \u201cContribution margin\u201d is a helpful indicator for tracking and modeling this sort of change. \u201cGross margin\u201d is revenue less the cost of goods sold. Contribution margin goes further to include all<\/em> variable costs:<\/p>\n Thus \u201ccontribution\u201d describes what is left to contribute toward fixed expenses such as salaries, software, insurance, and rent.<\/p>\n Anything remaining \u2014 contribution margin less fixed expenses \u2014 is operating profit.<\/p>\n Imagine a $100 ecommerce order.<\/p>\n The product costs $40, payment processing is $3, fulfillment and shipping total $12, expected returns account for $5, and performance advertising runs $15.<\/p>\n The order produces a $25 contribution margin before the USPS rate increase. An 8% increase adds 56 cents to the order cost, reducing contribution margin to $24.44.<\/p>\n <\/p>\n The $0.56 difference on a single order is small. Across 10,000 holiday orders, however, it represents $5,600 less contribution toward salaries, software, and rent.<\/p>\n The same exercise can model changes in FBA fees, advertising costs, return rates, discounts, or other variable expenses.<\/p>\n\n
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Contribution Margin<\/h3>\n
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Contribution margin = Revenue \u2212 Total variable costs
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Order Economics<\/h3>\n
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\n \nOrder Economics<\/th>\n Original<\/th>\n After 8% USPS Increase<\/th>\n<\/tr>\n<\/thead>\n \n Revenue<\/td>\n $100.00<\/td>\n $100.00<\/td>\n<\/tr>\n \n Product cost<\/td>\n -$40.00<\/td>\n -$40.00<\/td>\n<\/tr>\n \n Payment processing<\/td>\n -$3.00<\/td>\n -$3.00<\/td>\n<\/tr>\n \n Fulfillment<\/td>\n -$5.00<\/td>\n -$5.00<\/td>\n<\/tr>\n \n Shipping<\/td>\n -$7.00<\/td>\n -$7.56<\/strong><\/td>\n<\/tr>\n \n Expected returns<\/td>\n -$5.00<\/td>\n -$5.00<\/td>\n<\/tr>\n \n Performance advertising<\/td>\n -$15.00<\/td>\n -$15.00<\/td>\n<\/tr>\n \n Contribution margin<\/td>\n $25.00<\/td>\n $24.44<\/td>\n<\/tr>\n \n Contribution margin %<\/td>\n 25.0%<\/td>\n 24.4%<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n