Marginal costs refer to the additional expense sustained in the production of an extra unit of product or service. The cost is often obtained from the production variable cost, provided that fixed prices don't vary with output variations. This results in no extra costs in generating another unit of a product or service after the initiation of production.

On the other hand, marginal analysis is described as a measurement of the additional advantages of operations compared to the extra expenses incurred by the operation.

The other difference is that marginal costs are used in evaluating specific operations, while marginal analysis can be used in assessing general operations.