Why marginal cost of production matters to a first-time founder
This cost helps decide whether an extra order or unit adds value at the current capacity. It usually excludes fixed costs that do not change. However, marginal cost can jump when more output requires overtime, another machine or expedited materials.
Examples of marginal cost of production
A bakery’s total production cost rises from ₦1 million for 500 loaves to ₦1.18 million for 600. Marginal cost over that range is (₦1.18 million − ₦1 million) ÷ (600 − 500) = ₦1,800 per additional loaf, assuming the range is meaningful.
Common misunderstanding
It is not average cost, which divides all production costs by all units. Marginal cost measures the change from extra output. It is also not always constant: supplier discounts can lower it, while capacity limits, waste or overtime can raise it.
When to use it
Use it when evaluating an incremental order, production volume or short-term price floor. Calculate it over the realistic change in output, not an imaginary single unit if production happens in batches. Include every cost that genuinely changes because of the decision.