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Documentation Index

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Composite charges let you apply a percentage-based charge to a set of usage charges. A composite charge is calculated as a percentage of the total spend for a defined set of usage products (by product IDs or tags). Common use cases include platform fees and support charges—for example, “5% of all compute and storage spend.” Composite charges can include an optional minimum. For example: “10% of applicable spend, with a $500/month minimum.”

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Flexibility

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Percentage rates above 100%

Composite charge percentage rates can exceed 100% (for example, 150%). This can be useful for advanced pricing and discounting schemes where the composite represents a derived value rather than a simple surcharge.

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Tiered percentage rates

Composite charge percentage rates can be tiered - customers receive more favorable rates on support the more that they spend.

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Scope

Composite charges can be scoped to control where the line item appears:
  • Contract scope: The composite charge is calculated from spend on a specific contract and appears on that contract’s invoice.
  • Customer scope: The composite charge is calculated across spend within the same customer and is billed to one contract.

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How composite charges are calculated

Composite charges are based on usage spend for the applicable products and tags. The composite product acts like “derived spend” over a set of usage products, producing an invoice line item priced with a percentage rate and an optional minimum. Minimum behavior: If you configure a minimum, Metronome charges the greater of (a) the percentage-based composite amount and (b) the configured minimum for that invoice.