Variable costs
Costs that move up and down with sales volume.
Last reviewed 12 September 2026
Materials, shipping, payment processing fees, contractor hours, usage-based infrastructure.
Variable costs are where margin improvements compound: shaving 3% off a per-unit cost repeats on every future sale.
Frequently asked
What is variable costs?+
Costs that move up and down with sales volume. Materials, shipping, payment processing fees, contractor hours, usage-based infrastructure. Variable costs are where margin improvements compound: shaving 3% off a per-unit cost repeats on every future sale.
Why does variable costs matter for founders?+
Variable costs are where margin improvements compound: shaving 3% off a per-unit cost repeats on every future sale.
Related terms
Fixed costs
Costs you pay regardless of how much you sell.
Contribution margin
Revenue minus all variable costs — what each sale contributes to fixed costs.
COGS (cost of goods sold)
Costs that exist only because you delivered the sale.
Unit economics
Revenue and cost measured per single unit — one customer, one order, one project.
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