fixed costs

Fixed costs are expenses whose total does not change in proportion to the activity of a business, within the relevant time period or scale of production. For example, a retailer must pay rent and utility bills irrespective of sales to be considered part of fixed costs, but treated differently. Unit fixed costs decline with volume, following a rectangular hyperbola as the inverse of the volume of production.
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Noun
1. a periodic charge that does not vary with business volume (as insurance or rent or mortgage payments etc.)
(synonym) fixed charge, fixed cost
(hypernym) charge
(hyponym) cover charge, cover

a cost that does not vary depending on production or sales levels.